Top Blockchain Companies & Developers in Stockholm

Ratings Updated: April 24, 2026

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4 Leaders 7 Contenders

11 Companies

Country: Sweden

City: Stockholm

List of the Top Stockholm Blockchain Development Companies

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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.

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Reviews mention Accessible
Clients have consistently praised Nextrope for their accessibility and responsiveness throughout project collaboration. One reviewer highlighted the 'more than satisfactory' availability and response rate of their dedicated project manager, which facilitated effective communication. Furthermore, clients appreciate Nextrope's proactive approach in providing valuable resources, such as insightful articles and newsletters, enhancing the overall client experience. Overall, the sentiment regarding accessibility is highly positive, indicating a strong commitment to client engagement.

Ethereum Wallet for Technology Company

5.0 Aug 6, 2020

Our company was assigned a dedicated project manager and his availability and response rate both for calls and messages was more than satisfactory.
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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
Recent reviews for Nextrope reflect a highly positive sentiment, emphasizing their proactive approach and adaptability during project execution. Clients highlighted the team's strong ownership and commitment, noting significant improvements such as a 100% automated KYC/AML onboarding flow and a 60% reduction in manual work. The ability to quickly respond to evolving requirements was particularly valued, with one client stating that updates were implemented swiftly following brief alignment calls. Minor areas for improvement were suggested, but overall satisfaction remains high.
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Industry Experience

Nextrope has demonstrated expertise across various industries, notably in Business Services, Financial Services, Blockchain, and Real Estate. Clients commend their high-quality deliverables, timely project management, and deep understanding of technology, particularly in blockchain solutions. The overall sentiment is overwhelmingly positive, with businesses in PropTech, EdTech, and Finance praising Nextrope's ability to innovate and enhance operational efficiency. Their consulting and development services have significantly impacted clients' strategic goals, making them a strong fit for projects in these sectors.
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Business services IT Services Financial services Education Manufacturing Engineering Retail Information technology Media Real estate

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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.
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RedDuck

5.0 13 reviews

$10,000+

$50 - $99 / hr

10 - 49

Serves Stockholm, Sweden

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 Hard working
Clients consistently express appreciation for RedDuck's hard work and dedication. One client noted, "If they tell me something will be ready in four weeks, they actually do it in 2–3 weeks," highlighting their commitment to timely delivery. Additionally, feedback emphasizes their willingness to work late hours to meet deadlines, with the client stating, "RedDuck works hard, and if they can’t get their stuff together, they work late in the night." Overall, the sentiment reflects a strong admiration for their work ethic.

Web Development for Blockchain Game

5.0 Jan 27, 2022

RedDuck works hard, and if they can’t get their stuff together, they work late in the night. I live in Thailand, so it’d be nice for me if they started working at 10:00 or 11:00 a.m. I understand that it's too early for them, and they work late nights. However, it’d be a nice upgrade if they hired someone to pick up work in the morning.
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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
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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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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.
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Slashdev

5.0 18 reviews

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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 and recruitment company specializing in web and mobile application development, as well as providing skilled developers for clients’ specific project needs. Overall, the feedback is highly positive, with approximately 90% of reviews highlighting their efficiency, strong project management, and technical expertise. Clients commend their quick recruitment process and flexibility, although some suggest improvements in deliverables clarity and payment systems.

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Industry Experience

Slashdev has demonstrated expertise across various industries, including Education, Information Technology, Software, Healthcare, Business Services, Real Estate, and Retail. Clients consistently commend their ability to refactor complex codebases, develop mobile applications, and recruit specialized talent efficiently. The feedback is overwhelmingly positive, highlighting strengths in project management, communication, and adaptability. Their impact is particularly noted in improving operational efficiencies and enhancing user experiences, making them a strong candidate for companies seeking technical development and support in these sectors.
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Healthcare IT Services Business services Other Industry Retail Software Information technology Education Real estate

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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.
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Stockholm, Sweden

Mäster Samuelsgatan 36
Stockholm, Sweden 111 57
2 - 5

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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.
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ERRNA

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.

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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.
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Education

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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.
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Stockholm, Sweden

61 Sandhamnsgatan
Stockholm, Sweden 115 28
2 - 5

+1-435-800-0086

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OpenGeeksLab

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.

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Reviews mention Communicative
The overall sentiment regarding OpenGeeksLab's communication is highly positive. Clients consistently highlight their responsiveness and efficiency, noting that communication is clear and collaborative. One client emphasized the developer's availability for questions and updates, praising their logical approach to work. Another client mentioned that OpenGeeksLab's communication was fast and easy, which contributed to a successful partnership. This strong emphasis on effective communication reinforces the company's commitment to meeting client needs throughout the project lifecycle.

Staff Augmentation for Custom Software Dev Company

5.0 Mar 16, 2023

The communication is clear and efficient, and we are able to work collaboratively with their specialist to define project requirements, set deadlines, and track progress. Their specialist is highly responsive and engaged throughout the project, and he is always available to answer questions or provide updates as needed.
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Web-Based NFT App Dev for Metaverse Platform

5.0 Oct 19, 2022

We are following Agile practices, which involve constant collaboration between our team and theirs, and continuous improvement at every stage. I admire the overall approach and workflow: thoughtful planning, software architecture, well-established communication, timely delivery, and well-coordinated teamwork.
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Industry Experience

OpenGeeksLab has demonstrated expertise across multiple industries, including Beauty & Cosmetics, Advertising & Marketing, Software, Logistics & Supply Chain, Education, and Business Services. Clients consistently commend their professionalism, timely delivery, and ability to create tailored web solutions that enhance user engagement. Positive feedback highlights their strengths in project management and communication, particularly in developing user-friendly platforms and e-commerce systems. Overall, they are well-suited for projects in retail, software development, and educational platforms.
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Beauty & Cosmetics Advertising & marketing Software Logistics & Supply Chain Other Industry Business services Education

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Average Project Cost Breakdown

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

What Clients Have Said
Clients consistently highlight OpenGeeksLab's competitive pricing and excellent value for money. One client noted that their pricing 'fit our budget' while another emphasized their 'good value for cost.' Overall sentiment reflects satisfaction with the affordability of services, suggesting that clients perceive a strong return on investment. Despite some minor suggestions for improvement, the majority of feedback underscores the company's ability to deliver high-quality results within budget constraints.
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Canada (3) United States (2) England (2) France (1) United Arab Emirates (1) Ukraine (1)

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Blocksism

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.

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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.
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Other Industry

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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.
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More Digital Studios Sweden AB

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.
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Stockholm, Sweden

7 Nybrogatan
Stockholm, Sweden 114 34
6 - 9

+46703983649

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Erlang Solutions

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.
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Stockholm, Sweden

Blekholmstorget 30 F
Stockholm, Sweden 111 64
21 - 30

+44 (0) 20 7456 1020

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skilledpeople.

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.
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Clever Compliance

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.
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Sierratech

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.

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Inc Dev

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.
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Dwellir

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.
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Ability to deliver

Focus

Proven

Market Leaders

Emerging

Niche

Clutch Leaders Matrix

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

1 ERRNA

2 OpenGeeksLab

3 Slashdev

4 Blocksism

A Clutch Leaders Matrix provides a broad view of the top-performing companies in a particular service or location. Each company featured in a Leaders Matrix is evaluated based on Focus and Ability to Deliver. The size of each circle indicates that company’s size.

By using verified reviews, focused service details, and real project data, the Leaders Matrix highlights companies that consistently deliver and stand out from the rest. Each company’s position is based on how well they focus on a service area and how consistently they deliver results, helping you make informed, confident decisions. Learn More

Focus (x-axis)

Focus accounts for a company’s specialization within a certain service.

Ability to Deliver (y-axis)

Ability to Deliver considers three criteria:

Client feedback and reviews
Work experience and previous projects
Market presence and reputation in the industry

List of the Top 4 Stockholm Blockchain Development Companies

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

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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

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Slashdev

$5,000+

$50 - $99 / hr

10 - 49

Stockholm, Sweden

Ability to deliver

35.5/40.0

17/20 Reviews

10/10 Clients & Experience

8.5/10 Market Presence

Service focus

10% Blockchain

90% Other

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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

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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

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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

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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

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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

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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

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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

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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

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Top Blockchain Companies & Developers in Stockholm

List of the Top Stockholm Blockchain Development Companies

Reviews mention Accessible

Ethereum Wallet for Technology Company

Reviewed 1 time in the past 6 months

Industry Experience

Select Industry to see insights

Nextrope is very responsive

Reviews mention Hard working

Web Development for Blockchain Game

Blockchain Development for FinTech Company

Average Project Cost Breakdown

What Clients Have Said

RedDuck is very responsive

Industry Experience

Select Industry to see insights

Average Project Cost Breakdown

What Clients Have Said

Industry Experience

Select Industry to see insights

Average Project Cost Breakdown

What Clients Have Said

Reviews mention Communicative

Staff Augmentation for Custom Software Dev Company

Web-Based NFT App Dev for Metaverse Platform

Industry Experience

Select Industry to see insights

Average Project Cost Breakdown

What Clients Have Said

Industry Experience

Select Industry to see insights

Average Project Cost Breakdown

What Clients Have Said

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List of the Top 4 Stockholm Blockchain Development Companies

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