Top JavaScript Developers
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Featured
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$5,000+$25 - $49 / hr50 - 249London, EnglandServices provided
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See all 89 projectsDigis, a Fiverr company (NYSE: FVRR), is a web development firm specializing in full-stack and custom website development. Reviews consistently highlight their exceptional project management, technical expertise, and strong communication skills. Approximately 90% of reviewers commend their proactive and reliable service, resulting in improved project delivery times and increased user satisfaction across various web applications.
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Undisclosed$100 - $149 / hr2 - 9Cincinnati, OH
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See all 3 projectsDispersal Digital Agency is a web development company specializing in creating user-friendly websites. The feedback highlights their effective communication, timely delivery, and alignment with client values. Every review is positive, with 100% of clients expressing satisfaction, particularly appreciating the agency’s comprehensive approach, including logo creation and resource linking.
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$10,000+$25 - $49 / hr2 - 9
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See all 4 projectsTalentsToday is a versatile technology services company specializing in building MVPs and providing talented software engineers and designers for fintech and online education startups. The company consistently receives positive feedback, with 100% of reviewers highlighting their ability to quickly meet project needs with high-quality talent, and their adaptability to client project management styles. No areas for improvement were noted by clients.
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$5,000+$25 - $49 / hr2 - 9Kharkiv, Ukraine
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See all 1 projectsSpodar Group is a software development company specializing in optimizing and refactoring code for complex email systems. Their exceptional troubleshooting skills and 24/7 availability have led to the successful resolution of critical issues, as evidenced by their ability to close all support tickets permanently. The company maintains a strong project management approach, with 100% of reviewers highlighting their effective communication and commitment to staying on budget and on time.
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$10,000+$25 - $49 / hr2 - 9Warszawa, Poland
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See all 1 projectsSuitedSoft is a custom software development company specializing in AI and machine learning solutions. They receive overwhelmingly positive feedback, with clients praising their strong technical leadership and effective project management. Approximately 90% of reviews highlight their expertise in AI and ML, and their capability to deliver high-quality results.
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$5,000+$50 - $99 / hr2 - 9
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See all 1 projectsSEMANTIG is a web development company specializing in custom website development and web application development. They have received 100% positive feedback, with clients praising their thorough research, effective communication, and timely project delivery. Reviewers consistently highlight their ability to create user-friendly online platforms, as evidenced by a seamless transition for a client's online store.
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$5,000+$100 - $149 / hr2 - 9Bury St Edmunds, England
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See all 1 projectsORBN Digital is a web development company specializing in creating sleek, user-friendly, and professional websites. They have received 100% positive feedback, with clients highlighting their ability to integrate modern design elements and transform visions into impressive online platforms. Notably, 100% of reviewers praised their responsiveness and project management.
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$5,000+$50 - $99 / hr10 - 49Montevideo, Uruguay
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See all 3 projectsInzol is a consultancy firm specializing in supply chain process redesign and optimization, particularly in adapting to new ERP solutions. Their professional team is praised for understanding client needs and providing effective solutions, with 100% of reviewers highlighting their impressive workflow and communication. Clients also appreciate their cost-benefit balance and innovative problem-solving strategies.
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UndisclosedUndisclosed2 - 9C.A.B.A, Argentina
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See all 7 projectsAgencia Buffalo is a versatile web development company specializing in Website Development and social media marketing. With 100% positive reviews, clients appreciate their flexibility, adherence to deadlines, and budget management. Notably, 75% of reviews highlight their adaptability and proactive communication throughout projects. Their services include custom website development and social media management, demonstrating a strong commitment to meeting clients' evolving needs.
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$1,000+$100 - $149 / hr10 - 49
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See all 14 projectsWeb Design Stop is a Web Design company that also offers Business Card Design services. The company is praised for its reasonable and reliable services, with 100% of the reviewers noting effective communication and timely delivery. An area for improvement is clearer cost explanations post-initial consultations.
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$5,000+$25 - $49 / hr10 - 49Lahore, Pakistan
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See all 5 projectsAlpha Squared is a web development company renowned for its expertise in web design and development, particularly in the academic sector. The reviews highlight their exemplary customer service and professional project management, with 100% of reviewers praising their exceptional delivery and expertise. The company was recommended for their high standard of service and has been effective in meeting project timelines.
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$50,000+$150 - $199 / hr10 - 49Philadelphia, PA
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See all 3 projectsThe Tactile Group is a web application development company, excelling in both front-end and back-end development. Feedback highlights their timely delivery within budget constraints and transparent project management. Their expertise is appreciated by 98% of stakeholders, and their ability to reduce data collection burdens by 89% demonstrates their innovative approach to complex technical challenges.
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$25,000+Undisclosed10 - 49Dublin, Ireland
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See all 3 projectsSolvers is a web development company specializing in UI and UX design for web applications, particularly in the FinTech sector. With 100% positive feedback, clients praise their effective communication, experience in designing financial service solutions, and ability to enhance user engagement. Their collaborative approach and innovative designs significantly contributed to achieving project goals.
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$1,000+$25 - $49 / hr10 - 49Navi Mumbai, India
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See all 2 projectsCentillion is a web development company specializing in custom website development and web application development. Clients appreciate their professional approach, with 100% of reviews highlighting their dedication and effective communication. However, 50% suggest including more in-person meetings and clearly defining project scope to enhance collaboration. Overall, Centillion demonstrates strong project management and a commitment to client satisfaction.
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$1,000+$25 - $49 / hr10 - 49Gurugram, India
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See all 2 projectsWebInfoMart (MCSAM) is a web development company specializing in complex web programming and custom website development, including API interfaces and full-stack web development. The company receives 100% positive feedback, with clients highlighting their ability to meet deadlines and deliver on project complexities. Reviewers consistently praise their project management and communication skills.
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$5,000+$25 - $49 / hr10 - 49Lahore, Pakistan
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See all 1 projectsVastmesh is a web development company known for their expertise in creating custom CRM solutions. The reviews highlight their dedication and timely project delivery, with 100% positive feedback regarding the quality of their work. Clients appreciate their effective communication and project management skills, contributing to successful and ongoing collaborations.
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$5,000+$25 - $49 / hr10 - 49Bogotá, Colombia
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See all 6 projectsSLABCODE is a web development company specializing in web application and full-stack development, exemplified by their work on the MiFirma project. The reviews indicate 100% positive feedback, highlighting their smooth workflow, proactive attitude, and adaptability. Their expertise in integrating front-end and back-end technologies, such as Angular and .NET Core, is consistently praised.
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$5,000+$100 - $149 / hr2 - 9
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See all 1 projectsLegitratech is a web development company specializing in Website Development and SEO services. Review feedback is overwhelmingly positive, with clients highlighting their excellent product, quick response time, and effective project management. Overall, 100% of the feedback is positive, indicating client satisfaction with their services.
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$1,000+< $25 / hr2 - 9Chennai, India
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See all 1 projectsCyberMind Works is a web development company renowned for its proficiency in Web Application Development and Custom Website Development. Over 90% of the feedback highlights their high-quality output and strong project ownership, with most projects delivered on time. Clients appreciate their effective communication and alignment with project goals.
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Undisclosed$25 - $49 / hrFreelancer
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See all 1 projectsFreelance Web House is a web development company known for its expertise in maintaining websites, hosting, and blogs. Reviews highlight excellent project management and responsiveness, with 100% positive feedback on communication and satisfaction with the company's services. Most reviewers appreciate their cost-effective pricing and the ability to meet project deadlines.
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$25,000+$25 - $49 / hr10 - 49Kyiv, Ukraine
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See all 1 projectsSourceX is a software development company specializing in telecommunications, focusing on billing and CRM systems using technologies like Java and React.js. Customers report a 100% satisfaction rate, highlighting their telecommunications expertise and flexibility in project scope. All reviews reflect positive outcomes and recommend SourceX for software development in the telecom sector.
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$10,000+$25 - $49 / hr2 - 9Dubai, United Arab Emirates
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See all 3 projectsQualascend is a web development company specializing in custom website and web application development. With a focus on clarity, timeline adherence, and cost-effectiveness, they have consistently delivered successful projects, as noted by 100% positive feedback from reviewers. Approximately 50% of clients highlight their effective communication and ability to meet budgets.
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$10,000+$100 - $149 / hr2 - 9Westbury, England
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See all 3 projectsHoneystone is a web development company known for its Custom Website Development and Web Design services. With 100% positive feedback, reviewers consistently highlight Honeystone's commitment to understanding client needs and delivering on time. Clients appreciate their effective communication and ability to adapt approaches to suit unique business requirements.
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$5,000+< $25 / hr2 - 9
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See all 1 projectsJoykal Infotech is a web development company specializing in custom website development and web application development. They are praised for their efficient project management and responsiveness, often responding within 48 hours. Notably, 100% of reviewers highlight their proactive problem-solving and ability to deliver unique solutions, demonstrating their strong expertise in online development.
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$1,000+$100 - $149 / hr2 - 9
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See all 1 projectsGOsustainably is a web development company specializing in custom website development, web design, and full-stack web development, utilizing platforms like WordPress, Joomla, and Magento. They receive positive feedback for their consistent delivery of high-functioning websites and exceptional project management, with 100% of reviewers highlighting their hands-on and responsive approach. Clients appreciate their ability to enhance online visibility through effective SEO strategies.
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$1,000+$50 - $99 / hr2 - 9New Delhi, India
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See all 1 projectsWontonee is a versatile digital solutions company specializing in branding, web development, and social media management. Reviews highlight their strong communication skills and impressive commitment to project success, with 100% of reviewers expressing satisfaction. Notably, one client's website traffic increased by 345% post-implementation, underscoring their effective service delivery.
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Undisclosed$50 - $99 / hr2 - 9Wrocław, Poland
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See all 1 projectsReds Code is a web development company specializing in enhancing web applications and server architecture. With 100% positive feedback, they are praised for their exceptional communication, collaborative approach, and effective project management. Their expertise in Database and Server enhancement led to improved user experiences and reliability, meeting evolving business needs efficiently.
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$1,000+< $25 / hr10 - 49Faisalabad, Pakistan
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See all 3 projectszawata Afnan Technologies is a Web Development company specializing in creating comprehensive digital solutions, including customer incentive platforms and scalable reservation systems. The reviews highlight their strong project management, timely delivery, and high-quality work, with approximately 100% of clients expressing satisfaction with their flexibility and attention to detail.
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$10,000+$150 - $199 / hr10 - 49Wilmington, NC
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See all 1 projectsDesignLoud, Inc. is a digital marketing agency known for enhancing inbound leads, brand awareness, and online discoverability. According to reviews, they increased website traffic by 50% and inbound leads by 200%, with 100% of feedback highlighting their exceptional communication and timely delivery. The company is praised for its alignment with client values and high standards in marketing services.
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$1,000+$25 - $49 / hr10 - 49Jaipur, India
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See all 2 projectsi4 Consulting Pvt Ltd is a versatile software development company specializing in web and mobile application development. The firm is praised for its thorough project documentation, flexible payment options, and commitment to delivering value, with 100% of reviewers highlighting their impressive project management and customer service. However, some feedback suggests room for improvement in managing development time and accommodating cultural holidays.
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$5,000+< $25 / hr10 - 49Chennai, India
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See all 2 projectsYsquare Technology is a proficient Web Development company specializing in custom web and mobile application development. With a solid track record of meeting project timelines, 100% of their feedback highlights their technical expertise and organizational skills. Clients praise their flexibility and effective project management, underscoring their capability to handle full-stack development projects effectively.
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$5,000+$25 - $49 / hr10 - 49
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See all 1 projectsOtimbi Labs is a web development company specializing in Website Development and Web Design, offering comprehensive services like custom website creation and mobile app design. The majority of feedback highlights their professionalism and timely delivery, though there is a noted need for improved language capabilities. Approximately 90% of reviewers praise their responsive project management and innovative design solutions.
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$5,000+$25 - $49 / hr10 - 49Jakarta, Indonesia
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See all 6 projectsCallour Studio is a web development and design company recognized for its expertise in Web Design, Website Development, and UI/UX product designs. With a 100% positive feedback rate, clients commend their project management, responsiveness, and technical skill. Notably, 50% of reviewers highlight their proficiency in managing and completing projects on time and within scope, underscoring their professional and efficient service delivery.
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$1,000+$25 - $49 / hr10 - 49
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See all 1 projectsSigma Square is a technology hub and creative strategy studio specializing in machine learning, AWS architecture, and mobile app development. Reviewers appreciate their problem-solving abilities, noting that 100% found their approach resilient and effective. However, 100% suggested improvements in project management, such as implementing JIRA tickets for better accountability. Overall, clients enjoy working with Sigma Square due to their seamless communication and adaptability.
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$1,000+$50 - $99 / hr2 - 9
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See all 3 projectsYolo Humans is a Web Development company that excels in creating responsive, custom WordPress websites with a focus on UI/UX design and functionality. Their projects consistently meet client expectations, with 100% of reviewers noting their responsiveness and ability to efficiently implement feedback. The company is praised for clear communication, although some suggest improvements in turnaround time.
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$25,000+< $25 / hr2 - 9Kallady, Sri Lanka
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See all 1 projectsMpowerr is a software development company specializing in advanced 3D rendering and image extraction solutions. Their services have been highly regarded, with 100% of reviews highlighting their cost-effectiveness and ability to meet project requirements. Clients appreciate their R&D capabilities and timely delivery, with no significant areas cited for improvement.
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$1,000+< $25 / hr10 - 49Gandhinagar, India
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See all 5 projectsRDFlex is an IT services company specializing in Odoo development and customization. Reviews indicate a mixed reputation; approximately 60% of feedback is positive, praising their flexibility, expertise, and project management, while about 40% highlight significant issues with communication and delivery timelines. Clients appreciate their technical proficiency but suggest improvements in commitment and responsiveness.
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$1,000+$25 - $49 / hr2 - 9Ahmedabad, India
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See all 2 projectsShanti InfoMainia is a web development company known for its exceptional creativity and professionalism in delivering custom website development projects. The client, Angelik Power Studio, praised their ability to create a user-friendly site that boosted business growth by 50%, highlighting the firm’s impressive project management and responsiveness. All feedback was positive, emphasizing their creativity and customer-centric approach.
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$5,000+$100 - $149 / hr2 - 9
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See all 1 projectsEB Media is a web development company specializing in creating and managing custom website development and digital marketing services. They have received overwhelmingly positive feedback, with 100% of reviewers praising their personalized service and effective communication. Clients report significant business growth, such as a 40% sales increase, highlighting EB Media's impactful contributions in online development and web programming.
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$50,000+Undisclosed10 - 49Derwood, MD
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See all 15 projectsProduct Savvy Consulting, LLC is a web development company that specializes in creating FinTech B2B enterprise-grade systems. Their work is highly praised for its seamless integration and robust functionality, with 100% positive feedback highlighting their exceptional comprehension of business needs and effective project management. Clients appreciate their adaptability and the ability to exceed expectations in delivering custom software solutions.
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$1,000+$25 - $49 / hr10 - 49Тошкент, Uzbekistan
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See all 3 projectsMimsoft is a web development company specializing in custom website development, with a focus on news publishing platforms. The feedback is predominantly positive, highlighting the quality of deliverables and the expertise of their team members, although some reviewers noted room for improvement in time management.
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$1,000+< $25 / hr10 - 49Ahmedabad, India
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See all 2 projectsRed Turtle is a versatile web development company specializing in Web Design, Custom Website Development, and Web Application Development. Their clients commend them for creativity and effective collaboration, with 90% positive feedback emphasizing their ability to transform imaginative ideas into reality. The team is praised for their project management skills and responsiveness, though continuous learning is suggested for technological advancement.
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Undisclosed$50 - $99 / hr10 - 49
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See all 1 projectsJankosoft is a web development company specializing in custom website development with a strong focus on building secure and user-friendly online platforms. Based on client feedback, 100% of reviewers express satisfaction with Jankosoft’s services, highlighting their exceptional service, support, and competitive pricing in web application development.
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$5,000+$25 - $49 / hr10 - 49
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See all 1 projectsSaadhvi Technology is a custom IT software development company, praised for delivering a stable applicant tracking system. Their well-structured and dedicated team, featuring highly skilled developers, ensures effective and timely project management. Feedback indicates 100% satisfaction, with no areas for improvement mentioned by reviewers.
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$5,000+Undisclosed10 - 49
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See all 2 projectsOne Zone Agency is a web development company specializing in Website Development, Branding, and SEO/SEM. The agency consistently receives positive feedback, with 100% of reviews highlighting their timely delivery and alignment with client needs. Reviewers frequently commend their ability to create unique corporate identities and effective social media management.
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Undisclosed$25 - $49 / hr10 - 49Anand, India
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See all 2 projectsEngineeous is a dynamic technology company specializing in software development and digital transformation solutions. With 100% positive feedback, reviewers commend their technical expertise, timely delivery, and strong project management. Clients appreciate their proactive approach and the innovative solutions provided by their team, particularly the engaging leadership of Kalpesh. While highly satisfied, some suggest enhancing developer onboarding processes.
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$5,000+Undisclosed10 - 49
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See all 1 projectsOdev is a web development company specializing in full-stack web development for web3 projects, including smart contract and node development. The overall feedback from reviewers is positive, highlighting Odev's high-quality developers and excellent cultural fit, with 100% of reviewers appreciating their responsiveness and integration as part of the client's team.
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$1,000+$25 - $49 / hr10 - 49
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See all 1 projectsEmporionSoft Pvt Ltd is a web development company that specializes in full-stack web development, focusing on both front-end and back-end development. Reviews highlight their exceptional project management and technical expertise, with 100% of reviewers praising their adaptability and responsiveness. However, some suggest more frequent project updates could improve client communication.
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$1,000+< $25 / hr2 - 9
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See all 3 projectsDigital GrowT excels in Shopify store development and digital marketing, providing comprehensive web development and online development services. With consistently positive feedback, 100% of reviewers commend their transparency, timely delivery, and innovative suggestions. Clients appreciate their proactive communication and ability to align with business goals, resulting in enhanced website functionalities and improved conversion rates.
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$1,000+$25 - $49 / hr10 - 49Faridabad, India
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See all 5 projectsMeta 11 Web Services Pvt. Ltd. is a distinguished web development company specializing in website development, web design, and digital marketing. Garnering 100% positive feedback, clients frequently commend their professional project management, timely delivery, and tailored solutions. Approximately 50% of reviewers emphasize their exceptional responsiveness and alignment with company values.
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$50,000+$100 - $149 / hr10 - 49London, England
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Made by ON is a web development firm. The London, England-based company specializes in Web Development and Digital Strategy.
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We evaluate service providers using a structured methodology that combines:
- In-depth client interviews and ratings
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- Market presence
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This data powers tools like the Leaders Matrix, which helps you compare agencies directly. Our research team curates rankings by weighing verified reviews most heavily, so the most trusted and experienced providers rise to the top.
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List of the Top 15 JavaScript Development Companies
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$75,000+$100 - $149 / hr50 - 249Vancouver, Canada
Ability to deliver
39.7/40.020/20 Reviews10/10 Clients & Experience9.7/10 Market PresenceService focus
90% Web Development50% JavaScript10% Other -
$25,000+$50 - $99 / hr50 - 249Kraków, Poland
Ability to deliver
39.3/40.019.4/20 Reviews10/10 Clients & Experience9.9/10 Market PresenceService focus
70% Web Development50% JavaScript30% Other -
$50,000+$50 - $99 / hr50 - 249Gliwice, Poland
Ability to deliver
39.3/40.019.4/20 Reviews10/10 Clients & Experience9.9/10 Market PresenceService focus
45% Web Development75% JavaScript55% Other -
$25,000+$50 - $99 / hr50 - 249Gliwice, Poland
Ability to deliver
39.8/40.020/20 Reviews10/10 Clients & Experience9.8/10 Market PresenceService focus
40% Web Development60% JavaScript60% Other -
$10,000+$50 - $99 / hr50 - 249Montevideo, Uruguay
Ability to deliver
39.5/40.020/20 Reviews10/10 Clients & Experience9.5/10 Market PresenceService focus
50% Web Development35% JavaScript50% Other -
$10,000+Undisclosed50 - 249San Francisco, CA
Ability to deliver
38.5/40.019.2/20 Reviews9.6/10 Clients & Experience9.7/10 Market PresenceService focus
40% Web Development50% JavaScript60% Other -
$25,000+< $25 / hr250 - 999Ahmedabad, India
Ability to deliver
39.7/40.020/20 Reviews10/10 Clients & Experience9.7/10 Market PresenceService focus
65% Web Development20% JavaScript35% Other -
$10,000+$50 - $99 / hr50 - 249Kuala Lumpur, Malaysia
Ability to deliver
39.3/40.020/20 Reviews10/10 Clients & Experience9.3/10 Market PresenceService focus
30% Web Development70% JavaScript70% Other -
$5,000+$50 - $99 / hr50 - 249Chicago, IL
Ability to deliver
39.7/40.020/20 Reviews10/10 Clients & Experience9.7/10 Market PresenceService focus
35% Web Development40% JavaScript65% Other -
$5,000+$25 - $49 / hr50 - 249L'viv, Ukraine
Ability to deliver
36.3/40.017.4/20 Reviews10/10 Clients & Experience8.9/10 Market PresenceService focus
70% Web Development50% JavaScript30% Other -
$10,000+$25 - $49 / hr250 - 999San Francisco, CA
Ability to deliver
39.9/40.020/20 Reviews10/10 Clients & Experience9.9/10 Market PresenceService focus
15% Web Development40% JavaScript85% Other -
$25,000+$25 - $49 / hr50 - 249Newark, DE
Ability to deliver
39.6/40.019.6/20 Reviews10/10 Clients & Experience10/10 Market PresenceService focus
40% Web Development35% JavaScript60% Other -
$10,000+$50 - $99 / hr250 - 999Marlborough, MA
Ability to deliver
39.3/40.019.6/20 Reviews10/10 Clients & Experience9.7/10 Market PresenceService focus
25% Web Development25% JavaScript75% Other -
$1,000+< $25 / hr250 - 999Walpole, MA
Ability to deliver
35.9/40.016.2/20 Reviews10/10 Clients & Experience9.7/10 Market PresenceService focus
40% Web Development35% JavaScript60% Other -
$50,000+$50 - $99 / hr1,000 - 9,999New York, NY
Ability to deliver
39.8/40.020/20 Reviews10/10 Clients & Experience9.8/10 Market PresenceService focus
10% Web Development25% JavaScript90% Other -
$50,000+$25 - $49 / hr50 - 249Kharkiv, Ukraine
Ability to deliver
36.4/40.016.6/20 Reviews10/10 Clients & Experience9.8/10 Market PresenceService focus
45% Web Development50% JavaScript55% Other -
$5,000+< $25 / hr50 - 249Ahmedabad, India
Ability to deliver
36.3/40.016.6/20 Reviews10/10 Clients & Experience9.7/10 Market PresenceService focus
60% Web Development45% JavaScript40% Other -
$10,000+< $25 / hr250 - 999Hanoi, Vietnam
Ability to deliver
38.7/40.019.2/20 Reviews10/10 Clients & Experience9.5/10 Market PresenceService focus
30% Web Development21% JavaScript70% Other -
$25,000+$25 - $49 / hr50 - 249L'viv, Ukraine
Ability to deliver
37/40.018/20 Reviews10/10 Clients & Experience9/10 Market PresenceService focus
40% Web Development50% JavaScript60% Other -
$50,000+$100 - $149 / hr1,000 - 9,999San Francisco, CA
Ability to deliver
38.3/40.018.4/20 Reviews9.9/10 Clients & Experience10/10 Market PresenceService focus
15% Web Development25% JavaScript85% Other -
$100,000+$25 - $49 / hr250 - 999Cebu City, Philippines
Ability to deliver
38.7/40.020/20 Reviews10/10 Clients & Experience8.7/10 Market PresenceService focus
30% Web Development20% JavaScript70% Other -
$10,000+$25 - $49 / hr250 - 999New York, NY
Ability to deliver
40/40.020/20 Reviews10/10 Clients & Experience10/10 Market PresenceService focus
28% Web Development15% JavaScript72% Other -
$10,000+$50 - $99 / hr10 - 49Warszawa, Poland
Ability to deliver
37.5/40.018.2/20 Reviews10/10 Clients & Experience9.3/10 Market PresenceService focus
50% Web Development70% JavaScript50% Other -
$10,000+$25 - $49 / hr1,000 - 9,999Plano, TX
Ability to deliver
36.5/40.016.8/20 Reviews10/10 Clients & Experience9.7/10 Market PresenceService focus
20% Web Development25% JavaScript80% Other -
$50,000+$150 - $199 / hr50 - 249Matlock, England
Ability to deliver
37.8/40.018/20 Reviews10/10 Clients & Experience9.8/10 Market PresenceService focus
100% Web Development30% JavaScript -
$50,000+$150 - $199 / hr250 - 999Irvine, CA
Ability to deliver
36.2/40.016.2/20 Reviews10/10 Clients & Experience10/10 Market PresenceService focus
30% Web Development30% JavaScript70% Other -
$50,000+$150 - $199 / hr50 - 249New York, NY
Ability to deliver
35.5/40.015.8/20 Reviews10/10 Clients & Experience9.7/10 Market PresenceService focus
60% Web Development45% JavaScript40% Other -
$5,000+$50 - $99 / hr50 - 249Maribor, Slovenia
Ability to deliver
36.1/40.020/20 Reviews10/10 Clients & Experience6.1/10 Market PresenceService focus
40% Web Development100% JavaScript60% Other -
$50,000+$50 - $99 / hr1,000 - 9,999L'viv, Ukraine
Ability to deliver
37.6/40.017.8/20 Reviews10/10 Clients & Experience9.8/10 Market PresenceService focus
21% Web Development18% JavaScript79% Other -
$25,000+$50 - $99 / hr50 - 249Poznań, Poland
Ability to deliver
40/40.020/20 Reviews10/10 Clients & Experience10/10 Market PresenceService focus
50% Web Development10% JavaScript50% Other
Top JavaScript Development Agencies
A JavaScript development company designs, builds, and maintains software products that rely on JavaScript across the stack. Teams typically handle front-end interfaces (React, Vue, or Angular), back-end services (Node.js, Express, NestJS), and database integrations. They translate business requirements into clean, maintainable code, implement third-party APIs, optimize performance, and provide ongoing support or feature enhancements. For startups, they may act as a dedicated product team; for enterprises, they often augment in-house engineers to accelerate delivery.
Most agencies bundle multiple offerings so clients can access full product life-cycle support:
- Discovery workshops & technical consulting
- UI/UX design and prototyping
- Front-end SPA or PWA development
- Server-side development with Node.js or Deno
- API design, GraphQL, and microservices architecture
- QA automation & performance testing
- DevOps, CI/CD, and cloud deployment (AWS, Azure, GCP)
- Post-launch maintenance and feature sprints
Some firms specialize in niches such as ecommerce storefronts, real-time dashboards, or IoT applications built with JavaScript frameworks like Next.js or Svelte.
Clutch data shows project budgets range widely:
- MVP or small web app - $15,000–$50,000
- Mid-size product build - $50,000–$200,000
- Enterprise-grade platform - $200,000–$1M+ | Hourly rates usually fall between $50–$149 depending on agency location, seniority, and specialization. Expect higher rates for U.S.-based teams and advanced services like real-time streaming or complex integrations.
- Align expertise: Verify experience with your required stack (e.g., React Native, TypeScript, serverless).
- Review case studies: Look for measurable outcomes—load-time reductions, user growth, or revenue lifts.
- Check communication style: Agile ceremonies, dedicated Slack channels, and transparent ticket tracking are green flags.
- Validate cultural fit: Long-term projects thrive when collaboration styles and time zones mesh.
- Compare total cost of ownership: Factor in maintenance, future scalability, and licensing—not just upfront build fees.
Shortlist 3-5 agencies on Clutch, schedule discovery calls, and request project roadmaps before signing an agreement.
- Guaranteed timelines without discovery
- No access to source code repositories during the engagement
- Outdated tech stacks (e.g., jQuery-only solutions for modern SPAs)
- Low developer retention or high turnover
- Vague pricing models or hidden fees
If an agency dismisses code reviews, ignores testing, or refuses to provide client references, proceed with caution
- Which JavaScript frameworks do you specialize in, and why?
- Can you walk me through a recent project with similar complexity?
- How do you ensure code quality—linting, peer reviews, automated tests?
- What is your approach to scalability and performance optimization?
- How will we communicate and track progress (tools, meeting cadence)?
- Who owns the intellectual property and source code upon project completion?
Clear answers reveal an agency’s maturity, processes, and commitment to delivering long-term value.
A freelancer is ideal for small fixes or short-term enhancements, offering lower overhead and flexible hours. Agencies provide multidisciplinary teams including project managers, UI designers, and QA engineers capable of delivering end-to-end solutions and scaling resources quickly. While agencies cost more, they reduce single-point-of-failure risk and accelerate time-to-market for complex products. How do JavaScript firms measure ROI? Common KPIs include page-load speed improvements, conversion rate uplifts, reduced infrastructure costs after code optimization, and user engagement metrics (session duration, churn reduction). Firms often set baseline metrics during discovery and provide post-launch analytics dashboards to demonstrate value.
Common KPIs include page-load speed improvements, conversion rate uplifts, reduced infrastructure costs after code optimization, and user engagement metrics (session duration, churn reduction). Firms often set baseline metrics during discovery and provide post-launch analytics dashboards to demonstrate value.