# Top Blockchain Companies & Developers in South Korea Recommended Blockchain companies in South Korea include Infograins Software Solutions, ITDA, Rock'n'Block, Mckinley & Rice Inc.. We verify reviews and evaluate companies so you can choose with confidence. We may earn a fee for some placements. [Learn how Clutch ensures trust](#why-trust-clutch) ## List of the Best Top Blockchain Companies in South Korea Ratings Updated: Aug 2, 2026 ### [Infograins Software Solutions](https://clutch.co/profile/infograins-software-solutions-1-0) #### 4.9 out of 5 star rating (89 reviews) - $5,000+ minimum project size - $50 - $99 average hourly rate - 250 - 999 employees - Seoul, South Korea #### Services Provided - Allocation of Expertise by Percentage - 15% Custom Software Development - 20% AI Development - 30% Blockchain - 15% Mobile App Development - 10% IT Staff Augmentation - 10% Web Development #### Company description Infograins Software Solutions is a Blockchain Development company specializing in Blockchain Technology, Distributed Ledger Development, and Smart Contract Development, providing innovative solutions for various industries. Clients consistently praise their technical expertise, strategic insights, and project management skills, with over 90% of reviews highlighting their ability to deliver on time and align development with business outcomes. [Visit Website](https://infograins.com/) #### Openness Clients commend Infograins Software Solutions for their openness in communication, highlighting that channels were always accessible, which facilitated a smooth workflow. One client noted their understanding of blockchain technology, which aided in promptly resolving issues. The overall sentiment reflects satisfaction, with no grievances reported, and a recommendation for continued collaboration due to the effective communication practices observed. - Blockchain Dev Services for Music & Entertainment Company (5.0/5, Jul 11, 2022): Communication channels were always open, which is crucial for a quick startup. Their understanding of blockchain technology helped us easily resolve challenging issues that cropped up along the route. Regarding Infograins, they have performed exceptionally well in all areas, including communication and speed. [Read Full Review](https://clutch.co/go-to-review/infograins-software-solutions-1-0/149471) #### Very responsive Infograins Software Solutions is very responsive They are a great candidate to start a conversation with. Send them a short message or project inquiry. #### 3 fixed price Blockchain packages Blockchain Launch Package Build secure and scalable blockchain solutions for your business. Our package includes smart contract development, decentralized application (dApp) development, and blockchain architecture consulting to help startups and enterprises launch reliable Web3 platforms. #### 2% of employees work in Seoul office Seoul, South Korea Hanyang Building 59-1 Gangnam-daero 6-gil, Seocho-gu 2 - 5 employees +919770477239 [See All Locations (40)](https://clutch.co/profile/infograins-software-solutions-1-0#location) --- ### [ITDA](https://clutch.co/profile/itda) - $10,000+ minimum project size - $25 - $49 average hourly rate - 2 - 9 employees - seoul, South Korea #### Services Provided - Allocation of Expertise by Percentage - 20% Custom Software Development - 10% Blockchain - 20% E-Commerce Development - 5% IT Strategy Consulting - 20% Mobile App Development - 5% Other IT Consulting and SI - 20% Web Development #### Company description Software development firm ITDA specializes in Custom Software Development and Web Development. They were launched in 2021. [Visit Website](https://itdadev.com) --- ### [Rock'n'Block](https://clutch.co/profile/rocknblock-0) #### 5 out of 5 star rating (2 reviews) - $10,000+ minimum project size - $50 - $99 average hourly rate - 50 - 249 employees - Seoul, South Korea #### Services Provided - Allocation of Expertise by Percentage - 100% Blockchain #### Company description Rock'n'Block is a blockchain development company specializing in smart contract security audits and cross-chain solutions. Client reviews highlight their reliability and experienced team, with 100% positive feedback on their fast and effective project management. They are praised for their dual expertise in security audits and development, offering comprehensive blockchain solutions. [Visit Website](https://rocknblock.io/) #### High-quality work Clients consistently praise Rock'n'Block for delivering high-quality work, emphasizing their reliability and expertise. One client noted the swift completion of a smart contract audit and expressed satisfaction with the results, highlighting the effectiveness of both the auditing and development teams. Overall, feedback reflects a strong sentiment towards the quality of deliverables and the professionalism of the team, with no significant areas for improvement identified. #### Experience in 1 industry Rock'n'Block has received positive feedback primarily from the software industry, particularly in blockchain-related projects such as smart contract audits and cross-chain solutions. Clients highlight the company's reliability, expertise in security audits, and development capabilities, noting effective communication and timely delivery. Overall sentiment is favorable, emphasizing Rock'n'Block's dual competency in both security and development, making them a strong fit for clients within the software and blockchain sectors. [Read All Reviews](https://clutch.co/profile/rocknblock-0?verified=true#reviews) ##### Software Experience Rock'n'Block demonstrates notable expertise in the Software industry, particularly in blockchain solutions and smart contract security audits. Clients commend their reliability, effective communication, and the speed of deliverables, highlighting their dual capability in security auditing and development. The positive sentiment reflects their strong project management approach, making them a suitable choice for businesses seeking comprehensive software services in the blockchain domain. - 1 review for software industry - 1 review is 5 stars - $10,000 – $49,000 avg. project cost - Cybersecurity Services for Blockchain Company (5.0/5, Jun 14, 2022): A blockchain company engaged with Rock'n'Block for cybersecurity services. After conducting a security audit and identifying the vulnerabilities, the team developed a suitable solution for the company.  [Read Full Review](https://clutch.co/go-to-review/rocknblock-0/22836) #### 5.0 out of 5.0 rating for cost What Clients Have Said Clients commend Rock'n'Block for their competitive pricing and strong value for money. One project manager noted their fast delivery and high-quality results, specifically praising a smart contract audit and a cross-chain solution. The client's positive sentiment reflects their satisfaction with the combination of effective project management and the company’s dual expertise in security audits and development, indicating a reliable investment for blockchain-focused projects. [Read All Reviews](https://clutch.co/profile/rocknblock-0?verified=true#reviews) - $10,000 to $49,000 (1 reviews) #### 9% of employees work in Seoul office Seoul, South Korea 5th floor, 40, Godeok-ro, Gangdong-gu 10 - 15 employees [See All Locations (3)](https://clutch.co/profile/rocknblock-0#location) --- ### [Mckinley & Rice Inc.](https://clutch.co/profile/mckinley-rice) #### 4.5 out of 5 star rating (1 reviews) - $25,000+ minimum project size - $25 - $49 average hourly rate - 50 - 249 employees - Seoul, South Korea #### Services Provided - Allocation of Expertise by Percentage - 5% Custom Software Development - 5% Enterprise App Modernization - 10% AI Development - 10% Blockchain - 5% Application Management & Support - 5% E-Commerce Development - 25% Mobile App Development - 5% Application Testing - 5% IT Staff Augmentation - 25% Web Development #### Company description Mckinley & Rice Inc. is a web development company specializing in website duplication, customization, and localization using WordPress, WooCommerce, and AWS. They received positive feedback for their project management skills, meeting tight deadlines, and responsiveness, with 100% satisfaction from reviewers. Clients appreciate their dedication to delivering client-specific solutions and responsibility in handling projects. [Visit Website](https://mckinleyrice.com) #### High-quality work Clients have expressed high satisfaction with the quality of work provided by Mckinley & Rice Inc., highlighting their ability to meet tight deadlines and deliver customized solutions. One client noted, 'They did a good job' and appreciated their responsiveness, stating, 'They usually answer the phone even if it’s late or on the weekend.' Overall, the sentiment reflects a strong endorsement of their commitment to delivering high-quality results tailored to client needs. #### Experience in 1 industry Mckinley & Rice Inc. has demonstrated expertise in the financial services sector, particularly in website development and customization. Clients commend their ability to meet tight deadlines and their strong communication throughout projects. The overall sentiment is highly positive, emphasizing their reliability and responsiveness. This company is well-suited for clients within financial services seeking efficient and tailored digital solutions. [Read All Reviews](https://clutch.co/profile/mckinley-rice?verified=true#reviews) ##### Financial services Experience Mckinley & Rice Inc. has demonstrated strong expertise in the Financial services sector, particularly in website development and customization. Clients have praised their ability to meet tight deadlines and their commitment to project accountability. Feedback highlights effective communication and responsiveness, with clients noting satisfaction with the results delivered. Overall, their dedication to client requirements and timely execution makes them a favorable choice for businesses in the Financial services industry seeking reliable technical support. - 1 review for financial services industry - Unknown avg. project cost - WordPress Development for Multinational Investment Firm (4.5/5, Jul 21, 2020): Mckinley & Rice Inc. provided website development services to a financial company. They worked with WordPress, WooCommerce, and AWS. [Read Full Review](https://clutch.co/go-to-review/mckinley-rice/140504) #### 5.0 out of 5.0 rating for cost What Clients Have Said Clients have expressed satisfaction with Mckinley & Rice Inc.'s value for money, noting their ability to deliver quality work within tight deadlines. One client highlighted their responsiveness and commitment, stating they 'did a good job' and met all expectations without any areas for improvement. Overall, the sentiment indicates that the company's pricing aligns well with the quality of service provided, making them a reliable choice for projects requiring efficient execution. [Read All Reviews](https://clutch.co/profile/mckinley-rice?verified=true#reviews) --- #### Get personalized agency matches based on your project goals. [Find the right fit](https://project.clutch.co/project-brief?source=directory_slide_in_CTA&BPB_adoption_source=directory) ## Why Trust Clutch At Clutch, we believe trust is the foundation of every business relationship. Our mission is to help buyers make confident, data-backed decisions informed by real client experiences. Every review on Clutch undergoes a rigorous, human-led verification process to make sure it’s valid. Our team of specialists confirms the identity of each reviewer, ensures the project is legitimate, and only publishes reviews that meet our strict criteria. Verification doesn’t stop at the point of publication. 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