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Home Blockchain Sweden Stockholm

Top Blockchain Companies & Developers in Stockholm

Ratings Updated: June 24, 2026
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11 Companies

Country: Sweden
City: Stockholm

List of the Top Stockholm Blockchain Development Companies

  • Featured

    What are Featured Providers?

    Nextrope Logotype

    Nextrope

    5.0 18 reviews
    Premier Verified
    $25,000+
    $50 - $99 / hr
    10 - 49
    Serves Stockholm, Sweden

    Services provided

    70% Blockchain
    30% Custom Software Development

    Nextrope is a Blockchain Development company specializing in Blockchain Solutions, Smart Contract Development, and Crypto Application Development. All reviews highlight their proactive approach, adaptability, and strong sense of ownership, with 100% positive feedback on their ability to align technological and business strategies effectively. Their expertise contributed to a 60% reduction in manual work and faster investment processes.

    See all 18 projects
    1 of 1 Blockchain reviews are 5 stars
    $10,000 – $49,000 avg. project cost

    Blockchain PROJECT HIGHLIGHT

    Blockchain Platform Dev for Real Estate Investment Platform

    5.0 — Nextrope developed a blockchain-based real estate tokenization platform for a real estate investment platform. The team designed the system's core architecture and developed the front- and backend. Read more
    Read 1 Review

    Average Project Cost Breakdown

    $10,000 to $49,000 (10) Less than $10,000 (4) $50,000 to $199,999 (2)

    What Clients Have Said

    Overall, clients have expressed positive sentiments regarding Nextrope's cost and value for money. For instance, one CEO noted their selection was based on 'good value for cost,' while another highlighted that Nextrope's deliverables exceeded expectations, aligning with the standards of major consulting firms. Clients appreciated the flexibility and responsiveness of the team, often remarking on the high-quality outcomes delivered within reasonable budgets. Overall, Nextrope is perceived as a reliable partner that offers significant value relative to its pricing.
    Read All Reviews

    More responsive than most other service providers

    Nextrope is very responsive

    They are a great candidate to start a conversation with. Send them a short message or project inquiry.
    Get in Touch

    View projects from:

    Poland (11) United Arab Emirates (2) Estonia (1) Norway (1) England (1)
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    RedDuck Logotype

    RedDuck

    5.0 14 reviews
    $5,000+
    $50 - $99 / hr
    10 - 49
    Serves Stockholm, Sweden

    Services provided

    100% Blockchain

    RedDuck is a prominent Blockchain Development company known for delivering comprehensive blockchain solutions, including smart contract and cryptocurrency development. The company consistently receives praise for its technical expertise, project management, and responsive communication, with over 90% of reviewers highlighting their professionalism and ability to meet deadlines. Clients appreciate their strategic approach and commitment to delivering high-quality, secure, and user-friendly decentralized applications.

    See all 14 projects

    Reviews mention Transparent

    Clients have consistently praised RedDuck for their transparency throughout the project lifecycle. One CEO noted that RedDuck provided regular progress updates and was transparent about any necessary adjustments. Clear and responsive communication was highlighted, with feedback being quickly implemented. The overall sentiment reflects a strong appreciation for RedDuck's professionalism and adaptability, establishing them as a reliable development partner that prioritizes client engagement and satisfaction.
    • 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.

      Read Full Review
    Read All Reviews
    5 of 5 Blockchain reviews are 5 stars
    2 new reviews for Blockchain in past 6 months
    $50,000 – $199,999 avg. project cost

    Blockchain PROJECT HIGHLIGHT

    Blockchain Development for FinTech Company

    5.0 — RedDuck developed a DeFi platform for a financial technology company. The team built the client's smart contracts, backend infrastructure, frontend app, user dashboard, landing website, and a Read more
    Read 5 Reviews

    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.

    Read All Reviews

    Select Industry to see insights

    Financial services Other Industry Logistics & Supply Chain Gaming

    More responsive than most other service providers

    RedDuck is very responsive

    They are a great candidate to start a conversation with. Send them a short message or project inquiry.
    Get in Touch
    View Profile Visit Website
  • Slashdev Logotype

    5.0 18 reviews
    Verified
    $5,000+
    $50 - $99 / hr
    10 - 49
    Stockholm, Sweden

    Services provided

    10% Blockchain
    20% Custom Software Development
    20% Mobile App Development +4 services
    20% Web Development
    10% AI Development
    10% E-Commerce Development
    10% IT Staff Augmentation

    Slashdev is a versatile IT services company offering tailored solutions for software development, web and mobile app development, and recruitment of specialized developers. Based on extensive client feedback, Slashdev is praised for its strong technical expertise, flexibility, and timely delivery, with approximately 90% of reviews highlighting their exceptional project management and responsiveness. Clients also commend their ability to quickly understand complex systems and provide scalable solutions, although some suggest improvement in deliverable clarity during planning stages.

    See all 18 projects

    Reviews mention Great team

    Clients consistently praise Slashdev for their exceptional team, highlighting their quick response in recruiting skilled developers. One client noted, "Slashdev’s quickness to find a developer with the right set of skills" was impressive, as they sourced candidates within a weekend. The project management was also commended for fluent communication and effective tracking. Overall, the sentiment reflects a strong endorsement of Slashdev's team capabilities and dedication to client needs.
    • Front- & Backed Dev for SaaS Company
      5.0 Jun 19, 2023

      Great pool of talents, flexibility with in the frame of the company and approach, easy and quick communication from the management.

      Read Full Review
    • Kotlin Development for IT Services Company
      5.0 Feb 2, 2023

      I was most impressed with Slashdev’s quickness to find a developer with the right set of skills. Slashdev has a team of developers, so they immediately understood the project's technical requirements and found the right professional.

      Read Full Review
    Read All Reviews

    Average Project Cost Breakdown

    $10,000 to $49,000 (4) Less than $10,000 (3) $50,000 to $199,999 (1)

    What Clients Have Said

    Clients consistently highlight Slashdev's competitive pricing and excellent value for money. One client noted they selected Slashdev due to their 'good value for cost' and 'pricing fit our budget.' Another emphasized that they received 'the best value on the market' and appreciated the company's commitment to delivering high-quality results at a fraction of competitors' prices. Overall, feedback reflects strong satisfaction with the balance between cost and the quality of service provided.
    Read All Reviews

    View projects from:

    England (4) United States (3) Sweden (2) Armenia (1) Brazil (1) Canada (1) Greece (1)

    Review Rating from Clients

    5.0/5.0

    Quality

    5.0

    Schedule

    5.0

    Cost

    5.0

    Willing to Refer

    5.0

    Swedish clients in Stockholm commend Slashdev for their swift, high-quality mobile development, including banking apps and EdTech features. Reviewers value their transparency, skilled senior engineers, and proactive project management, resulting in successful, timely project outcomes.
    Read Local Reviews
    View Profile Visit Website
  • ERRNA Logotype

    4.8 2 reviews
    $5,000+
    < $25 / hr
    1,000 - 9,999
    Stockholm, Sweden

    Services provided

    60% Blockchain
    10% Cybersecurity
    10% Marketing Strategy +2 services
    10% Mobile App Development
    10% Web Design

    ERRNA offers services including Blockchain Development, Smart Contract Development, and Decentralized Application (DApp) Development. The client feedback highlights ERRNA's ability to deliver secure and effective blockchain solutions on time and within budget. Clients appreciate their professionalism, project management, and the high quality of their developed applications.

    See all 2 projects

    Industry Experience

    ERRNA has received positive feedback primarily from the education industry, with clients highlighting their strengths in product development and project management. Their expertise in managing product roadmaps and backlog prioritization has been beneficial for educational platforms like MyTutor. Overall sentiment reflects strong satisfaction, particularly in communication and alignment with client values, making ERRNA a suitable choice for projects focused on educational technology and development.

    Read All Reviews

    Select Industry to see insights

    Education

    Average Project Cost Breakdown

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

    What Clients Have Said

    Clients have expressed satisfaction with ERRNA's pricing structure, highlighting it as a good fit for their budget and noting the overall value for money. One client emphasized that the company aligned with their values and provided effective project management. Additionally, the quality of team communication and transparency was praised, reinforcing the perception of ERRNA as a cost-effective choice for product development needs.
    Read All Reviews

    Stockholm, Sweden

    61 Sandhamnsgatan
    Stockholm, Sweden 115 28

    2 - 5

    +1-435-800-0086

    See All Locations (33)
    View Profile
  • OpenGeeksLab Logotype

    4.9 17 reviews
    $10,000+
    $25 - $49 / hr
    50 - 249
    Stockholm, Sweden

    Services provided

    30% Blockchain
    30% Custom Software Development
    20% Mobile App Development +1 service
    20% Web Development

    OpenGeeksLab is a blockchain development company specializing in integrating blockchain technology to enhance security, transparency, and efficiency. The company has received 100% positive feedback for its expertise in smart contract development and project management. Clients commend OpenGeeksLab for its professionalism and ability to tailor blockchain solutions to specific business needs, ensuring successful project delivery.

    See all 17 projects

    Reviews mention High-quality work

    Clients consistently praise OpenGeeksLab for delivering high-quality work that meets project requirements and deadlines. One client noted that the code produced was of such high standard that it required very few hotfixes post-launch, emphasizing its reliability. Another client appreciated the developer's logical approach and commitment to quality, stating they felt confident in the expertise provided. Overall, feedback reflects a strong sentiment of satisfaction regarding the quality and effectiveness of the services rendered.
    • Web Revamp for Apparel & Accessories Shop
      5.0 May 20, 2023

      Outstanding expertise, professionalism, and dedication set OpenGeeksLab apart as an impressive and unique company in the web development industry. Their deep understanding of the retail apparel and fashion sector allowed them to deliver tailored solutions that exceeded our expectations. From visually appealing designs to seamless user experiences, their attention to detail was evident.

      Read Full Review
    • Web-Based NFT App Dev for Metaverse Platform
      5.0 Oct 19, 2022

      I admire the overall approach and workflow: thoughtful planning, software architecture, well-established communication, timely delivery, and well-coordinated teamwork. Also, I’d like to mention high-quality post-release support and adding new features.

      Read Full Review
    • ReactJS Platform Development for Logistics Company
      5.0 Jun 8, 2021

      After launch, we had relatively few hotfixes to the code as the code was to such a high standard that it was pretty bulletproof.

      Read Full Review
    Read All Reviews

    Industry Experience

    OpenGeeksLab has demonstrated expertise across diverse industries, including retail apparel, advertising, cryptocurrency, education, and business services. Clients from the fashion industry praised their ability to enhance user engagement through modern website redesigns, while those in advertising appreciated their collaborative approach for optimized web projects. In cryptocurrency and other specialized sectors, OpenGeeksLab's flexibility and responsiveness were highlighted. Overall, feedback reflects a strong sentiment towards their professionalism, effective communication, and high-quality deliverables, making them suitable for various industry needs.

    Read All Reviews

    Select Industry to see insights

    Beauty & Cosmetics Advertising & marketing Software Logistics & Supply Chain Other Industry Business services Education

    Average Project Cost Breakdown

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

    What Clients Have Said

    Clients consistently praised OpenGeeksLab for their competitive pricing and exceptional value for money. A Director of Business Development noted that their pricing fit the budget while delivering great value, leading to a 30% increase in online sales. Similarly, a project manager highlighted their cost-efficiency, stating they were the most flexible and cost-effective choice after interviewing multiple vendors. Overall, the sentiment reflects high satisfaction with the balance of quality and cost-effectiveness.
    Read All Reviews

    View projects from:

    Canada (3) United States (2) England (2) France (1) United Arab Emirates (1) Ukraine (1)
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  • Blocksism Logotype

    4.0 1 review
    $5,000+
    $25 - $49 / hr
    Freelancer
    Stockholm, Sweden

    Services provided

    80% Blockchain
    10% Custom Software Development
    10% Web Development

    Blocksism is a blockchain development company specializing in creating smart contracts and blockchain prototypes, particularly within Hyperledger and Ethereum environments. The reviews highlight their responsiveness, agile project management, and competitive pricing, with 100% of reviewers noting successful prototype validation. They are recommended for small-scale projects due to their niche expertise and adaptability.

    See all 1 projects

    Industry Experience

    Blocksism has demonstrated expertise in the blockchain sector, particularly within the staffing and recruiting industry. Their strengths include effective communication, responsiveness, and agile project management, as noted in client feedback. They successfully developed a blockchain prototype using Hyperledger technology, validating all project requirements. Overall sentiment is positive, with clients appreciating their approachability and niche focus, although they could benefit from diversifying their technical frameworks beyond Ethereum.

    Read All Reviews

    Select Industry to see insights

    Other Industry

    Average Project Cost Breakdown

    What Clients Have Said

    Clients have expressed satisfaction with Blocksism's pricing, noting it as 'good' and reflecting strong value for money. One client mentioned spending $2,000 on a blockchain prototype, which met all validation goals. They appreciated Blocksism's responsiveness and adaptability to changing requirements, enhancing their overall experience. However, potential clients are advised to clarify costs and project scope upfront, and to consider starting with smaller projects to gauge the company’s capabilities.
    Read All Reviews
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  • More Digital Studios Sweden AB Logotype

    Not yet reviewed

    $5,000+
    $100 - $149 / hr
    10 - 49
    Stockholm, Sweden

    Services provided

    15% Blockchain
    30% Digital Strategy
    25% Advertising +3 services
    10% AR/VR Development
    10% UX/UI Design
    10% Web Development

    Headquartered in Piteå, Sweden and Stockholm, Sweden, More Digital Studios Sweden AB is a Digital Strategy company. Their services include Digital Strategy and Advertising.

    Read more

    Stockholm, Sweden

    7 Nybrogatan
    Stockholm, Sweden 114 34

    6 - 9

    +46703983649

    See All Locations (2)
    View Profile
  • Erlang Solutions Logotype

    Not yet reviewed

    $10,000+
    Undisclosed
    50 - 249
    Stockholm, Sweden

    Services provided

    10% Blockchain
    40% Custom Software Development
    20% IT Strategy Consulting +4 services
    10% IoT Development
    10% Other Application Development
    5% Computer Engineering
    5% Mobile App Development

    Erlang Solutions is a software development company. The London, England-based team specializes in Custom Software Development and IT strategy consulting.

    Read more

    Stockholm, Sweden

    Blekholmstorget 30 F
    Stockholm, Sweden 111 64

    21 - 30

    +44 (0) 20 7456 1020

    See All Locations (5)
    View Profile
  • skilledpeople. Logotype

    Not yet reviewed

    $10,000+
    $100 - $149 / hr
    2 - 9
    Stockholm, Sweden

    Services provided

    40% Blockchain
    40% Business Consulting
    20% Digital Strategy

    Skilledpeople. Is a small Blockchain company located in Stockholm, Sweden. Their services include Blockchain and Business Consulting.

    Read more
    View Profile
  • Clever Compliance Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9
    Stockholm, Sweden

    Services provided

    40% Blockchain
    60% Custom Software Development

    Clever Compliance is a software development firm. Their small team is based in Stockholm, Sweden and Sollentuna, Sweden. Their services include Custom Software Development and Blockchain.

    Read more
    View Profile
  • Sierratech Logotype

    5.0 1 review
    $5,000+
    $50 - $99 / hr
    50 - 249
    Stockholm, Sweden

    Services provided

    20% Blockchain
    30% Web Development
    20% AI Development +3 services
    10% AR/VR Development
    10% Custom Software Development
    10% Low/No Code Development

    Sierratech offers services in Blockchain Development, focusing on secure platform development, user interface creation, and cryptocurrency integration. Reviews highlight Sierratech's cutting-edge expertise in blockchain technology, exemplary project management, and robust security measures. Clients commend their proactive communication and tailored solutions, ensuring projects are delivered on time with high standards of quality and compliance.

    See all 1 projects
    View Profile
  • Inc Dev Logotype

    Not yet reviewed

    $1,000+
    $25 - $49 / hr
    10 - 49
    Stockholm, Sweden

    Services provided

    17% Blockchain
    17% Custom Software Development
    17% UX/UI Design +3 services
    17% Web Development
    16% DevOps Managed Services
    16% Mobile App Development

    Inc Dev is a Stockholm, Sweden-based UX company. They focus on UX/UI Design and Custom Software Development.

    Read more
    View Profile
  • Dwellir Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    10 - 49
    Uppsala, Sweden

    Services provided

    100% Blockchain

    Dwellir is a Blockchain company. The team is located in Uppsala, Sweden, and their services include Blockchain.

    Read more
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1 ERRNA
2 OpenGeeksLab
3 Slashdev
4 Blocksism

List of the Top 4 Stockholm Blockchain Development Companies

  1. ERRNA Logotype

    ERRNA

    $5,000+
    < $25 / hr
    1,000 - 9,999
    Stockholm, Sweden

    Ability to deliver

    32.9/40.0
    16.2/20 Reviews
    9.7/10 Clients & Experience
    7/10 Market Presence

    Service focus

    60% Blockchain
    40% Other
    View Profile Visit Website
  2. OpenGeeksLab Logotype

    OpenGeeksLab

    $10,000+
    $25 - $49 / hr
    50 - 249
    Stockholm, Sweden

    Ability to deliver

    33.4/40.0
    15.6/20 Reviews
    10/10 Clients & Experience
    7.8/10 Market Presence

    Service focus

    30% Blockchain
    70% Other
    View Profile Visit Website
  3. Slashdev Logotype

    Slashdev

    $5,000+
    $50 - $99 / hr
    10 - 49
    Stockholm, Sweden

    Ability to deliver

    35.3/40.0
    16.8/20 Reviews
    10/10 Clients & Experience
    8.5/10 Market Presence

    Service focus

    10% Blockchain
    90% Other
    View Profile Visit Website
  4. Blocksism Logotype

    Blocksism

    $5,000+
    $25 - $49 / hr
    Freelancer
    Stockholm, Sweden

    Ability to deliver

    19.4/40.0
    13/20 Reviews
    1.8/10 Clients & Experience
    4.6/10 Market Presence

    Service focus

    80% Blockchain
    20% Other
    View Profile Visit Website
  5. More Digital Studios Sweden AB Logotype

    More Digital Studios Sweden AB

    $5,000+
    $100 - $149 / hr
    10 - 49
    Stockholm, Sweden

    Ability to deliver

    14.3/40.0
    0/20 Reviews
    9/10 Clients & Experience
    5.3/10 Market Presence

    Service focus

    15% Blockchain
    85% Other
    View Profile Visit Website
  6. Erlang Solutions Logotype

    Erlang Solutions

    $10,000+
    Undisclosed
    50 - 249
    Stockholm, Sweden

    Ability to deliver

    12.2/40.0
    0/20 Reviews
    4.8/10 Clients & Experience
    7.4/10 Market Presence

    Service focus

    10% Blockchain
    90% Other
    View Profile Visit Website
  7. skilledpeople. Logotype

    skilledpeople.

    $10,000+
    $100 - $149 / hr
    2 - 9
    Stockholm, Sweden

    Ability to deliver

    8.4/40.0
    0/20 Reviews
    3.8/10 Clients & Experience
    4.6/10 Market Presence

    Service focus

    40% Blockchain
    60% Other
    View Profile Visit Website
  8. Clever Compliance Logotype

    Clever Compliance

    Undisclosed
    Undisclosed
    2 - 9
    Stockholm, Sweden

    Ability to deliver

    5.3/40.0
    0/20 Reviews
    0/10 Clients & Experience
    5.3/10 Market Presence

    Service focus

    40% Blockchain
    60% Other
    View Profile Visit Website
  9. Sierratech Logotype

    Sierratech

    $5,000+
    $50 - $99 / hr
    50 - 249
    Stockholm, Sweden

    Ability to deliver

    4.9/40.0
    0/20 Reviews
    0/10 Clients & Experience
    4.9/10 Market Presence

    Service focus

    20% Blockchain
    80% Other
    View Profile Visit Website
  10. Inc Dev Logotype

    Inc Dev

    $1,000+
    $25 - $49 / hr
    10 - 49
    Stockholm, Sweden

    Ability to deliver

    6.1/40.0
    0/20 Reviews
    2.1/10 Clients & Experience
    4/10 Market Presence

    Service focus

    17% Blockchain
    83% Other
    View Profile Visit Website
  11. Dwellir Logotype

    Dwellir

    Undisclosed
    Undisclosed
    10 - 49
    Uppsala, Sweden

    Ability to deliver

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

    Service focus

    100% Blockchain
    View Profile Visit Website

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