Top Blockchain Companies & Developers in Stockholm

Ratings Updated: April 3, 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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RedDuck

5.0 13 reviews
Verified

$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 Timely
Overall, client feedback highlights RedDuck's strong commitment to timely delivery. One client noted their 'impeccable experience and deliverable product in extremely timely manner,' while another emphasized their 'productive time management' and consistent on-time deliveries. Additionally, responsiveness was praised, with one client mentioning that most inquiries received a response within an hour. This consistent sentiment indicates that RedDuck effectively meets deadlines and maintains proactive communication throughout project phases.

Platform Development for Financial Services Company

5.0 Jul 31, 2023

RedDuck has been very productive in their time management and has always delivered on time. They have been very proactive in communication with daily stand-ups and managers holding the junior devs responsible for the delivery timeline promised.
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Smart Contract Development for Metaverse

5.0 May 26, 2023

The RedDuck team responses extremely in-time. We usually set up in-day meetings so we could be on schedule and in context.
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Smart Contract Development for Blockchain Company

5.0 May 17, 2023

Mark and his team delivered an impeccable experience and deliverable product in extremely timely manner. These guys were the best! Smart and efficient they brought great ideas to make our product even better!
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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

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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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Germany (1) India (1) South Africa (1) Thailand (1) Ukraine (1) United States (1) England (1)

This provider is fluent in 4 languages:

English

German

Ukrainian

Russian

This provider is available in 37 time zones:

Colombia Time (COT)

Near East Time (NET)

Middle East Time (MET)

China Taiwan Time (CTT)

Gulf Standard Time (GST)

Brazil Eastern Time (BET)

Greenwich Mean Time (GMT)

India Standard Time (IST)

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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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1 of 1 reviews is 5 stars

Unknown avg. project cost

Reviewed 1 time in the past 6 months
In recent reviews, clients have praised Slashdev for their strong project management and flexibility, noting a 50% reduction in onboarding time and a 15% increase in Google reviews. One client highlighted the effective integration of a web service that enhanced customer experience and streamlined operations. However, there was feedback regarding the need for clearer communication on deliverables during the planning phase. Overall, the sentiment is positive, with clients appreciating the quality of work delivered.
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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 Easy to work with
Clients regard openGeeksLab as exceptionally easy to work with, highlighting their professional services and strong understanding of project requirements. One client emphasized the developers' collaborative nature, stating, "OpenGeeksLab has developers that are easy to work with" and praised their motivation and planning skills. Overall, the sentiment reflects a positive experience, with a suggestion for improved communication during project challenges.

Software Development for Business Management Company

4.0 Feb 12, 2018

OpenGeeksLab has developers that are easy to work with. They provide professional services in management and development. Their understanding and effort of work are unquestionable.
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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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Focus

Proven

Market Leaders

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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 Timely

Platform Development for Financial Services Company

Smart Contract Development for Metaverse

Smart Contract Development for Blockchain Company

Industry Experience

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Average Project Cost Breakdown

What Clients Have Said

Reviewed 1 time in the past 6 months

Average Project Cost Breakdown

What Clients Have Said

Industry Experience

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Average Project Cost Breakdown

What Clients Have Said

Reviews mention Easy to work with

Software Development for Business Management Company

Industry Experience

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Average Project Cost Breakdown

What Clients Have Said

Industry Experience

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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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