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Home Blockchain South Korea Seoul

Top Blockchain Companies & Developers in Seoul

Ratings Updated: April 8, 2026
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2 Leaders 2 Contenders

4 Companies

Country: South Korea
City: Seoul

List of the Top Seoul Blockchain Development Companies

  • Featured

    What are Featured Providers?

    RedDuck Logotype

    RedDuck

    5.0 13 reviews
    Verified
    $10,000+
    $50 - $99 / hr
    10 - 49
    Serves Seoul, South Korea

    Services provided

    100% Blockchain

    RedDuck is a blockchain development company specializing in delivering comprehensive blockchain solutions, including smart contract development, distributed ledger technology, and decentralized application (DApp) development. Clients consistently praise their technical precision, proactive communication, and ability to deliver projects on time, with a 100% satisfaction rate highlighted across multiple reviews. Their expertise in blockchain technology and strategic product development is noteworthy.

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    Reviews mention Professional

    Clients consistently highlight RedDuck's exemplary professionalism, noting their ability to manage complex projects with technical precision and creativity. One client emphasized their clear communication and responsiveness, stating, 'RedDuck showed a high level of professionalism and adaptability to our evolving requirements.' Another praised their structured approach, which left little room for concern, indicating a strong commitment to client success and satisfaction. Overall, feedback reflects a positive sentiment towards RedDuck's professional capabilities.
    • Blockchain Development for FinTech Company
      5.0 Apr 23, 2025

      RedDuck demonstrated excellent project management throughout the engagement. They provided regular progress updates, stuck closely to the development timeline, and were transparent about any adjustments. Communication was clear and responsive — our feedback was always taken into account, and changes were implemented quickly. Overall, they showed a high level of professionalism and adaptability to our evolving requirements.

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    Industry Experience

    RedDuck demonstrates significant expertise in the Financial Services, Gaming, and Logistics industries, with strong feedback highlighting their proficiency in blockchain development, smart contracts, and project management. Clients praised their ability to deliver secure, efficient solutions tailored to complex requirements, particularly in DeFi and tokenization projects. Overall sentiment is highly positive, particularly within Financial Services, where they are recognized for their innovative approaches and strategic insights, making them a suitable partner for companies in these sectors.

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    Financial services Other Industry Logistics & Supply Chain Gaming

    Average Project Cost Breakdown

    $50,000 to $199,999 (5) $10,000 to $49,000 (1)

    What Clients Have Said

    Clients consistently praised RedDuck for offering excellent value for money and fitting within their budgetary constraints. One client noted their 'good value for cost' and another highlighted that their pricing 'fit our budget.' Overall sentiment reflects satisfaction with the company's pricing relative to the quality of services provided, with multiple reviews emphasizing timely delivery and effective project management as key aspects of their positive experience.
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    Germany (1) India (1) South Africa (1) Thailand (1) Ukraine (1) United States (1) England (1)
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  • Rock'n'Block Logotype

    5.0 2 reviews
    $10,000+
    $50 - $99 / hr
    50 - 249
    Seoul, South Korea

    Services provided

    100% Blockchain

    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.

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    Industry Experience

    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.

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    Select Industry to see insights

    Software

    Average Project Cost Breakdown

    $10,000 to $49,000 (1)

    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.
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    Seoul, South Korea

    5th floor, 40, Godeok-ro, Gangdong-gu
    Seoul, South Korea 05251

    10 - 15

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  • Mckinley & Rice Inc. Logotype

    4.5 1 review
    $25,000+
    $25 - $49 / hr
    50 - 249
    Seoul, South Korea

    Services provided

    10% Blockchain
    25% Mobile App Development
    25% Web Development +7 services
    10% AI Development
    5% Application Management & Support
    5% Application Testing
    5% Custom Software Development
    5% E-Commerce Development
    5% Enterprise App Modernization
    5% IT Staff Augmentation

    Mckinley & Rice Inc. is a web development company specializing in website duplication, customization, and localization using platforms like WordPress and WooCommerce. Feedback is overwhelmingly positive, with 100% of reviews highlighting satisfaction with their fast delivery and responsiveness, particularly under tight deadlines. Clients appreciate their commitment to delivering as per client specifications.

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    Industry Experience

    Mckinley & Rice Inc. has demonstrated expertise in the financial services industry, particularly in website development and customization using WordPress and AWS. Clients commend their project management skills, timely delivery, and responsiveness, even under tight deadlines. Overall sentiment is highly positive, indicating strong performance and client satisfaction. This indicates that organizations within the financial sector seeking reliable web solutions and support would find Mckinley & Rice Inc. to be a suitable partner.

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    Financial services

    Average Project Cost Breakdown

    What Clients Have Said

    Clients have expressed satisfaction with Mckinley & Rice Inc.'s pricing relative to the value delivered. One reviewer noted that despite a tight schedule, the company successfully met deadlines and provided quality work, emphasizing their commitment to client requirements. The overall sentiment reflects a strong appreciation for their responsiveness and project management, with no significant concerns raised regarding cost-effectiveness. Clients feel they receive good value for their investment.
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    Review Rating from Clients

    4.5/5.0

    Quality

    4.0

    Schedule

    4.0

    Cost

    5.0

    Willing to Refer

    4.5

    In Seoul, clients highlight Mckinley & Rice Inc.'s expertise in website duplication, customization, and fast delivery. Their team of 2-3 developers efficiently managed complex projects, maintaining excellent communication and meeting strict schedules.
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  • ITDA Logotype

    Not yet reviewed

    $10,000+
    $25 - $49 / hr
    2 - 9
    seoul, South Korea

    Services provided

    10% Blockchain
    20% Custom Software Development
    20% E-Commerce Development +4 services
    20% Mobile App Development
    20% Web Development
    5% IT Strategy Consulting
    5% Other IT Consulting and SI

    Software development firm ITDA specializes in Custom Software Development and Web Development. They were launched in 2021.

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  • Infograins Software Solutions Logotype

    4.9 87 reviews
    $5,000+
    $50 - $99 / hr
    250 - 999
    Seoul, South Korea

    Services provided

    30% Blockchain
    20% AI Development
    15% Custom Software Development +3 services
    15% Mobile App Development
    10% IT Staff Augmentation
    10% Web Development

    Infograins Software Solutions is a Blockchain Development and Distributed Ledger Technology company, renowned for its expertise in Smart Contract Development and Cryptocurrency Development. Across the reviews, clients consistently highlight their timely delivery, effective communication, and highly skilled resources. Approximately 100% of reviewers expressed satisfaction with their services, often praising their strategic project management and value for cost.

    See all 87 projects

    Reviews mention Meets deadlines

    Infograins Software Solutions has received commendations for their ability to meet deadlines effectively. One client highlighted their commitment to improbable timelines, noting that Infograins completed a project in a tenth of the time suggested by other options. The team's responsiveness and accessibility were also praised, with the client emphasizing their capability to recognize time-sensitive tasks and deliver under pressure. Overall, the sentiment regarding their punctuality and reliability is highly positive.
    • SaaS Product Development for NFT Company
      5.0 Jul 11, 2022

      The entire crew was directly accessible to us, which made communication a breeze. Their ability to recognize when something is time-sensitive and meet deadlines under pressure is their most notable quality. Just stay on your current course.

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    1 of 1 reviews is 5 stars
    1 new review for Blockchain services
    $10,000 – $49,000 avg. project cost

    Reviewed 1 time in the past 6 months

    In the past six months, Infograins Software Solutions has received positive feedback for their project management and technical capabilities. A client praised their timely delivery and quality of work on an AI-based chat app with blockchain integration, noting the impressive breakdown of deliverables and effective communication. The client expressed satisfaction with their alignment in values and overall fit for the project, indicating no areas for improvement. Overall sentiment is highly favorable.
    Read 1 Recent Review

    View projects from:

    United States (21) United Arab Emirates (4) Germany (4) Australia (3) England (3) France (3) Singapore (2) Thailand (2) Italy (1) Ireland (1) Argentina (1) Netherlands (1) Portugal (1) India (1) South Africa (1) Spain (1) Sweden (1) Hong Kong (1) Croatia (1) Chile (1) Belgium (1)

    This provider is fluent in 2 languages:

    • English
    • Hindi

    This provider is available in 14 time zones:

    • Near East Time (NET)
    • Middle East Time (MET)
    • Brazil Eastern Time (BET)
    • Greenwich Mean Time (GMT)
    • India Standard Time (IST)
    • Eastern African Time (EAT)
    • Central European Time (CET)
    • Eastern European Time (EET)
    View all time zones
    $8,000 Basic smart contract and blockchain prototype deve $20,000 Smart contracts, dApp development, wallet integrat $50,000 Full blockchain platform including smart contracts

    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.
    View Packages
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1 Rock'n'Block
2 Mckinley & Rice Inc.

List of the Top 2 Seoul Blockchain Development Companies

  1. Rock'n'Block Logotype

    Rock'n'Block

    $10,000+
    $50 - $99 / hr
    50 - 249
    Seoul, South Korea

    Ability to deliver

    23.9/40.0
    16.2/20 Reviews
    1.8/10 Clients & Experience
    6/10 Market Presence

    Service focus

    100% Blockchain
    View Profile Visit Website
  2. Mckinley & Rice Inc. Logotype

    Mckinley & Rice Inc.

    $25,000+
    $25 - $49 / hr
    50 - 249
    Seoul, South Korea

    Ability to deliver

    23.6/40.0
    14.6/20 Reviews
    3.7/10 Clients & Experience
    5.3/10 Market Presence

    Service focus

    10% Blockchain
    90% Other
    View Profile Visit Website
  3. ITDA Logotype

    ITDA

    $10,000+
    $25 - $49 / hr
    2 - 9
    seoul, South Korea

    Ability to deliver

    11.7/40.0
    0/20 Reviews
    7.7/10 Clients & Experience
    4/10 Market Presence

    Service focus

    10% Blockchain
    90% Other
    View Profile Visit Website
  4. Infograins Software Solutions Logotype

    Infograins Software Solutions

    $5,000+
    $50 - $99 / hr
    250 - 999
    Seoul, South Korea

    Ability to deliver

    0/40.0
    0/20 Reviews
    0/10 Clients & Experience
    0/10 Market Presence

    Service focus

    30% Blockchain
    70% Other
    View Profile Visit Website

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