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Custom software development team

zerodays is a software development team specializing in end-to-end custom solutions. From ideation and initial design, prototyping to testing and delivering an outstanding final product, we are with you every step of the way. Our areas of work include AI development and consulting services, web and mobile apps, business digitalization, and process automation solutions as well as software for custom robots.

‍We've worked with various startups and visionaries as well as corporate clients.

  • Min project size
    $10,000+
  • Hourly rate
    $50 - $99 / hr
  • Employees
    10 - 49
  • Locations
    Ljubljana, Slovenia
  • Year founded
    Founded 2021

1 Locations

  • Ljubljana , Slovenia
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    Pricing Snapshot

    Min. project size $10,000+
    Avg. hourly rate $50 - $99 /hr
    Rating for cost 5 /5

    What Clients Have Said

    Zerodays is praised for providing good value for cost, with clients noting their pricing fit within budgets. Projects involved teams of 2-10 employees, and deliverables consistently met client expectations, enhancing user experience and increasing conversion rates.

    This summary is based on verified Clutch reviews.

    Most Common Project Size

    < $49,999 based on 6 reviews
    < $49,999 $50,000 - $199,999 $200,000 - $999,999 > $1,000,000
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    Highly Rated Similar Providers

    zerodays Review Insights

    Overall Review Rating

    5.0
    • Quality 5.0
    • Schedule 4.9
    • Cost 5.0
    • Willing to Refer 5.0

    Top Mentions

    Review Highlights

    • Areas for Improvement: Proactive Updates

      While communication is generally strong, one client suggested that proactive updates could be more frequent. This minor improvement could enhance the already excellent communication process.

    • Client-Centric Approach and Culture Fit

      Zerodays' alignment with client values and culture is a recurring theme. Clients appreciate their collaborative approach and commitment to client success, making them a preferred development partner.

    • Proficiency in Mobile and Web App Development

      Zerodays excels in developing mobile and web applications across various industries. Clients appreciate their technical skills in creating apps that integrate with hardware, manage data, and offer seamless user experiences.

    • Positive Impact on Client Business Metrics

      Zerodays' work has positively impacted client businesses, improving metrics such as user engagement, conversion rates, and operational efficiency. Their solutions drive tangible business results.

    • Flexibility and Adaptability

      Zerodays is recognized for their flexibility and ability to adapt to client needs and project changes. They offer valuable insights and are willing to pivot strategies to achieve better outcomes.

    • Commitment to Quality and User Experience

      Clients note zerodays' dedication to quality and user experience. They conduct thorough testing and quality assurance, resulting in reliable, secure, and user-friendly products that meet or exceed expectations.

    zerodays Reviews

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    Web & Mobile App Development for Electric Co

    • Custom Software Development Mobile App Development Web Development
    • Confidential
    • July 2024 - Mar. 2025
    5.0
    Quality
    5.0
    Schedule
    5.0
    Cost
    5.0
    Willing to Refer
    5.0

    "zerodays' exceptionally smart, well-organized, and friendly developers were outstanding."

    Managing Director, Grid Instruments
    Urban Kuhar
    • Electric
    • Ljubljana, Slovenia
    • 1-10 Employees
    • Online Review 
    • Verified

    zerodays has built an iOS and Android mobile app for an electric company using Flutter. The team has also built a multitenancy backend system with a web app for management. 

    MVP & Landing Page Design & Dev for Educational Software

    • Application Testing Web Design Web Development
    • $10,000 to $49,999
    • June - Sep. 2024
    5.0
    Quality
    5.0
    Schedule
    5.0
    Cost
    5.0
    Willing to Refer
    5.0

    "Their exceptional work, reliability, and commitment to exceeding expectations make them outstanding."

    Founder, Classmate
    Daniel Arzouman
    • Education
    • New York City, New York
    • 1-10 Employees
    • Online Review 
    • Verified

    zerodays designed an MVP for an educational software. The team designed and built a responsive landing page with custom graphics, created a Google Chrome extension, and worked on QA, testing, and support.

    Custom Software Dev for Tech Company

    • Custom Software Development Robotics Process Automation Web Development
    • $50,000 to $199,999
    • Jan. 2021 - Ongoing
    5.0
    Quality
    5.0
    Schedule
    5.0
    Cost
    5.0
    Willing to Refer
    5.0
    "They demonstrated excellent communication and execution skills."
    CEO, Zavod 404
    Rok Capuder
    • Pharmaceuticals
    • Ljubljana, Slovenia
    • 1-10 Employees
    • Online Review 
    • Verified

    A tech company has hired zerodays to build their application. They have developed the front- and backend, written code to drive the hardware, created a GUI, and offered maintenance.

    ERP Integration & AI Dev for E-Commerce Platform Provider

    • AI Development ERP Consulting and SI
    • $10,000 to $49,999
    • Jan. 2022 - Ongoing
    5.0
    Quality
    5.0
    Schedule
    4.5
    Cost
    5.0
    Willing to Refer
    5.0
    "zerodays has a highly professional yet user-friendly approach to conducting business."
    CEO, Appoteka d.o.o. / Shopamine
    Peter Brenko
    • eCommerce
    • Ljubljana, Slovenia
    • 1-10 Employees
    • Online Review 
    • Verified

    zerodays has assisted an e-commerce platform provider with ERP integration. They've connected Klaviyo and Mailchimp with e-commerce platforms and developed an AI tool for automatic product attribute generation.

    Web App Dev for SaaS-Driven Hospitality Marketplace

    • Application Testing Custom Software Development Web Development
    • $200,000 to $999,999
    • Dec. 2021 - Ongoing
    5.0
    Quality
    5.0
    Schedule
    5.0
    Cost
    5.0
    Willing to Refer
    5.0

    "Honestly, after 2 years, we see them as our team members, not an outsourced software agency."

    Founder & CEO, SaaS-Driven Hospitality Marketplace
    Anonymous
    • Software
    • United Kingdom
    • 1-10 Employees
    • Online Review 
    • Verified

    zerodays developed a SaaS-driven hospitality marketplace. The team used React JS, Python, and PostgreSQL to build the web app focusing on UX. The team also works on feature development and architecture design.

    Custom Coding Solutions for Premium Car Beds Company

    • Conversion Optimization E-Commerce Development Graphic Design
    • $10,000 to $49,999
    • June 2022 - Feb. 2023
    5.0
    Quality
    5.0
    Schedule
    4.5
    Cost
    5.0
    Willing to Refer
    5.0

    "I'm impressed with their ability to find solutions that are not obvious in terms of design."

    CEO, DreamCase
    William Frost
    • Automotive
    • Kranj, Slovenia
    • 11-50 Employees
    • Online Review 
    • Verified

    A premium car beds company hired zerodays to custom code a website and design its UI/UX. The site needed to be functional and stable; the team worked on simplifying the website and improving conversions.

    MVP Development for AI-Based Tuturing Company

    • AI Development Custom Software Development Web Development
    • Confidential
    • July 2023 - Ongoing
    5.0
    Quality
    5.0
    Schedule
    5.0
    Cost
    5.0
    Willing to Refer
    5.0

    "They went far and beyond to help us develop what we wanted."

    Founder, Astra AI
    Andrej P. Skraba
    • Education
    • Ljubljana, Slovenia
    • 1-10 Employees
    • Online Review 
    • Verified

    An AI-based tutoring company has hired zerodays to develop an MVP. The team has built the MVP and developed features like chat and interaction with an AI tutor using Azure OpenAI Service services.

    Custom Software Dev for Legal Services Firm

    • AI Development Custom Software Development IT Strategy Consulting
    • Confidential
    • June 2023 - June 2024
    5.0
    Quality
    5.0
    Schedule
    5.0
    Cost
    5.0
    Willing to Refer
    5.0

    "They were always solution-oriented and implemented a cost-performance approach."

    Partner & Legal Counsel, Legal Services Company
    Anže Skodlar
    • Legal
    • Ljubljana, Slovenia
    • 1-10 Employees
    • Online Review 
    • Verified

    zerodays set up an automated legal document for digital legal services, including automated legal document crafting services.

    Personalized Nutrition Mobile App Dev for Research Company

    • Mobile App Development
    • $50,000 to $199,999
    • Jan. 2024 - Ongoing
    5.0
    Quality
    5.0
    Schedule
    5.0
    Cost
    5.0
    Willing to Refer
    5.0

    "I’m impressed with the quality of their work and ethics."

    Senior Researcher, Jozef Stefan Institute
    Barbara Korousic Seljak
    • Research
    • Ljubljana, Slovenia
    • 501-1,000 Employees
    • Online Review 
    • Verified

    zerodays has developed a personalized nutrition mobile app for a research company. The team’s tasks include project management and software development. 

    Locations (1)

    6 - 9

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