Leave a Review For Providers 0 0
  • Post a Project
Home Blockchain Sweden Stockholm

Top Blockchain Companies & Developers in Stockholm

Ratings Updated: July 21, 2026
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

4 Leaders 7 Contenders

Get Matched

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

    Reviews mention High-quality work

    Nextrope has consistently received high praise for delivering high-quality work across various projects. Clients noted the thoroughness and applicability of their analyses, with one CEO highlighting the 'MBB-style business consultancy deck' that exceeded expectations. Another client emphasized the impressive quality of the web platform and mobile application they developed, which led to a 90% response rate from potential clients. Overall, clients commend Nextrope for their creativity, responsiveness, and commitment to excellence, with little to no areas for improvement identified.
    • Business Dev Consultancy for Construction Services Startup
      5.0 May 27, 2022

      Nextrope conducted a very thorough analysis of business cases and problems we brought to them and delivered a detailed workshop, together with MBB-style business consultancy deck. Everything was delivered on time and the final result exceeded our expectations. I was particularly impressed by the business applicability and usefulness of the information delivered in the consultancy, which was on the standard of big consulting companies (MBB, Big4).

      Read Full Review
    • Cybersecurity Audit for Blockchain-Based Company
      5.0 Dec 8, 2021

      The quality of the code has been improved and thoroughly checked, which is tantamount to smart contract security. Nextrope demonstrated great efficiency and speed in carrying out the audit. There were no unnecessary delays.

      Read Full Review
    • Web Development & Branding for Lifestyle Media Channel
      5.0 Apr 1, 2020

      The developed website design was subsequently carried over to all of our social media channels, as well as onto our visual and video content. The latter was one of the main contributors to our recent successes – our video collaborations with some of the biggest names with Poland were hailed for their visual quality, some of which was even deemed revolutionary and never seen before in the industry. I must say in this way the impact of Nextrope's work was much more far-reaching than the original contract work.

      Read Full Review
    • Web & Mobile App Development for Content Management Company
      5.0 Apr 2, 2020

      Nextrope is very creative in their solutions, they provide only the highest quality of work and never settle on less. They also work very fast and respond very quickly to any changes that are required.

      Read Full Review
    Read All Reviews
    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

    Industry Experience

    Nextrope has garnered positive feedback across multiple industries, including Real Estate, Business Services, Financial Services, Education, and Information Technology. Their expertise in blockchain solutions, project management, and adaptability has been highlighted, particularly for developing platforms and consulting on tokenization processes. Clients praised their proactive communication, timely delivery, and ability to provide tailored solutions. Overall, sentiments are highly favorable, suggesting that they are well-suited for projects in technology-driven sectors, particularly those involving blockchain and digital platforms.

    Read All Reviews

    Select Industry to see insights

    Information technology Financial services IT Services Education Engineering Retail Media Business services Real estate Manufacturing

    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 Profile Visit Website
    RedDuck Logotype

    RedDuck

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

    Services provided

    100% Blockchain

    RedDuck is a prominent Blockchain Development company specializing in Smart Contract Development, Decentralized Application (DApp) Development, and Blockchain Solutions. With a 100% positive feedback rate from reviewers, clients commend RedDuck for their technical precision, strategic product delivery, and exceptional project management. Approximately 80% of reviews highlight their responsive communication and ability to exceed expectations within budget constraints.

    See all 14 projects

    Reviews mention Professional

    Clients consistently highlight RedDuck's high level of professionalism, particularly in project management and communication. One client noted their 'excellent project management,' with timely delivery and clear updates. Another praised their 'proactive' and 'detail-oriented' approach, emphasizing their ability to manage complex projects with both technical precision and creative vision. Overall, feedback indicates a strong sentiment of trust and satisfaction, with clients appreciating RedDuck's adaptability and commitment to project success.
    • 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.

      Read Full Review
    Read All Reviews
    5 of 5 Blockchain reviews are 5 stars
    $50,000 – $199,999 avg. project cost

    Blockchain PROJECT HIGHLIGHT

    Custom Software Dev for Crypto Development Company

    5.0 — RedDuck designed and developed a custom frontend interface for a crypto development company. The scope included conceptualizing and building an advanced algorithmic bot to interact with the Read more
    Read 5 Reviews

    Industry Experience

    RedDuck has demonstrated expertise across telecommunications, financial services, gaming, and other industries. In telecommunications, they efficiently developed an API interface, enhancing client satisfaction with on-time delivery. In financial services, their comprehensive development capabilities for DeFi projects garnered positive feedback for strong project management and effective communication. Clients from gaming appreciated their ability to deliver complex projects swiftly. Overall, RedDuck is well-regarded for its technical precision, strong project management, and adaptability, making them a suitable partner for tech-driven initiatives in these sectors.

    Read All Reviews

    Select Industry to see insights

    Other Industry Logistics & Supply Chain Gaming Financial services

    Average Project Cost Breakdown

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

    What Clients Have Said

    RedDuck is consistently recognized for providing good value for money across various projects. Clients noted that their pricing fit within budget constraints while delivering high-quality outcomes. For example, one client appreciated RedDuck's 'good value for cost' and timely delivery, while another highlighted their 'excellent project management' and responsiveness. Overall, feedback reflects a positive sentiment regarding the company's cost efficiency and commitment to meeting client expectations.
    Read All Reviews
    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 software development company specializing in web and mobile applications, as well as offering recruitment services for specialized developers. The reviews indicate a high level of satisfaction, with approximately 85% of feedback highlighting their timeliness, effective project management, and flexibility. Clients commend their ability to quickly understand project requirements and deliver quality work, though some suggest improving planning clarity and integrating their management systems.

    See all 18 projects

    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 commend Slashdev for their competitive pricing and high value for money. For instance, one client noted that they selected Slashdev due to their pricing fitting within budget and providing great value. Another emphasized that Slashdev delivered beyond expectations at a fraction of the cost compared to competitors. Overall, the sentiment reflects satisfaction with the affordability of services while maintaining quality, with clients expressing a willingness to continue partnerships based on these favorable financial aspects.
    Read All Reviews

    View projects from:

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

    Stockholm, Sweden

    Mäster Samuelsgatan 36
    Stockholm, Sweden 111 57

    2 - 5

    See All Locations (8)

    Review Rating from Clients

    5.0/5.0

    Quality

    5.0

    Schedule

    5.0

    Cost

    5.0

    Willing to Refer

    5.0

    Local clients highlight Slashdev's strong technical knowledge in banking and EdTech sectors, with successful outcomes in app improvements and feature development. They value their efficient communication, fair pricing, and rapid talent matching for demanding, time-sensitive projects.
    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

    Industry Experience

    OpenGeeksLab has demonstrated expertise across various industries, including retail apparel and fashion, cryptocurrency, education, and business services. Clients consistently highlight the company's strengths in web and mobile application development, effective project management, and strong communication. Positive feedback emphasizes their ability to enhance user experience, increase sales, and deliver projects on time. Overall, OpenGeeksLab is well-suited for businesses seeking robust digital solutions in dynamic sectors such as e-commerce, technology, and education.

    Read All Reviews

    Select Industry to see insights

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

    Average Project Cost Breakdown

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

    What Clients Have Said

    OpenGeeksLab is recognized for delivering strong value for money, with several clients highlighting their cost-effectiveness and quality of service. For instance, one client noted that their pricing fit the budget and provided great value, while another emphasized their flexibility and cost-efficiency compared to competitors. Overall, feedback reflects a positive sentiment regarding the company's pricing structure, with many clients expressing satisfaction with the outcomes relative to their investment.
    Read All Reviews

    View projects from:

    Canada (3) United States (2) England (2) France (1) United Arab Emirates (1) Ukraine (1)
    View Profile

    • Share your project goals, and we’ll connect you with verified partners who fit your budget and timeline.

    Get My Matches
  • 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 utilizing Hyperledger technology. Reviews highlight their agility, responsiveness, and effective communication, with 100% of feedback emphasizing a successful prototype completion. Clients appreciate their competitive pricing, although suggestions include exploring frameworks beyond Ethereum. Overall, Blocksism delivers efficiently on niche blockchain solutions with a clear emphasis on client collaboration.

    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
    View Profile
  • 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
    View Profile

Tell us what you need — we’ll match you with top agencies in minutes.

Get My Matches
tracking image

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. Our Trust & Safety team routinely audits older reviews against our guidelines. When reviews fall short of our standards, we remove them.

We evaluate service providers using a structured methodology that combines:

  • In-depth client interviews and ratings
  • Comprehensive project details
  • Market presence
  • Portfolio examples and industry recognition

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.

Using this unique combination of verified client feedback and provider-supplied insights, Clutch distills the most important details into clear, digestible summaries so you have everything you need to make confident, informed decisions quickly.

We take fraud seriously. Providers who violate our guidelines may face lower rankings, restricted visibility, or removal from the platform altogether.

Clutch’s commitment to transparency is ongoing. We’re constantly refining our systems to protect the integrity of reviews and support you in finding the right agency.

Ability to deliver
Focus
Clutch Leaders Matrix

Rollover to see company insights or click a company below for more details.

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

Similar Categories

Related Services

AR/VR in Stockholm IoT in Stockholm Ruby on Rails in Stockholm DOTNET in Stockholm Software Testing in Stockholm Web Developers in Stockholm Software Developers in Stockholm Mobile App Development in Stockholm eCommerce in Stockholm

Specialties

Decentralized Finance Ethereum Initial Coin Offering Consulting Metaverse Development Smart Contract Auditing Smart Contract Development Tokenization web3
View More

Get matched with the 5 best-fit agencies for your project—in 4 minutes or less.