Top Blockchain Companies & Developers in Helsinki

Ratings Updated: June 17, 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

All Companies Leaders Matrix Pricing Services Guide

4 Leaders 4 Contenders

Get Matched

8 Companies

Country: Finland

City: Helsinki

List of the Top Helsinki Blockchain Development Companies

Sponsored

Featured

What are Featured Providers?
Nextrope

5.0 18 reviews
Premier Verified

$25,000+

$50 - $99 / hr

10 - 49

Serves Helsinki, Finland

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 Creative
Clients have praised Nextrope for their creativity and high-quality solutions. One client highlighted their impressive design samples and the beautiful landing page created for their platform. Additionally, they commended Nextrope's responsiveness and speed in implementing changes, noting that the overall project was completed efficiently within four months. The overall sentiment reflects strong satisfaction with Nextrope's creative capabilities, resulting in a significant positive impact on the client's business.

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

Was this helpful?

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

Was this helpful?

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
Clients consistently express satisfaction with Nextrope's cost-effectiveness and value for money. For instance, one CEO noted a 'good value for cost' and praised the team’s proactive approach, which enhanced overall project outcomes. Another client highlighted Nextrope's deliverables as 'on time' and 'exceeding expectations,' emphasizing the high quality of their work relative to budget. Overall, the sentiment reflects a strong appreciation for the balance of quality and affordability provided by Nextrope.
Read All Reviews

Was this helpful?

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

Was this helpful?
View Profile Visit Website
RedDuck

5.0 13 reviews

$5,000+

$50 - $99 / hr

10 - 49

Serves Helsinki, Finland

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.

See all 13 projects
Reviews mention Adaptable
Clients consistently praised RedDuck for their adaptability in managing complex projects. One client highlighted their responsiveness to evolving requirements, noting, 'Communication was clear and responsive — our feedback was always taken into account, and changes were implemented quickly.' Another emphasized their ability to combine technical precision with creative vision, reflecting a proactive approach to project management. Overall, feedback indicates a strong sentiment of satisfaction regarding RedDuck's flexibility and professionalism throughout the engagement.

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

Was this helpful?

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

Was this helpful?

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

Was this helpful?

View projects from:

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

Was this helpful?
View Profile Visit Website
Altoros

4.8 34 reviews

$25,000+

$50 - $99 / hr

250 - 999

Helsinki, Finland

Services provided

40% Blockchain

25% Custom Software Development

10% Enterprise App Modernization +4 services

10% Web Development

5% IT Staff Augmentation

5% Microservices Architecture Services

5% Mobile App Development

Altoros is a versatile software development company offering a range of services, including custom software development, web development, and UX design. Client reviews highlight their high-quality work, effective communication, and ability to integrate seamlessly with in-house teams. Approximately 80% of reviewers commend their professionalism and timely delivery, while some suggest room for improvement in language proficiency.

See all 34 projects

Industry Experience

Altoros has received positive feedback across various industries, particularly in financial services, where they demonstrated expertise in fintech application development, resulting in enhanced operational efficiency and client acquisition. In agriculture technology, their collaborative approach was praised for timely feature delivery. In food and beverage, they were recognized for effective mobile app development. Overall, clients commend Altoros for their strong communication, adaptability, and technical proficiency, making them a suitable partner for projects in financial services, agriculture, and software development.
Read All Reviews

Select Industry to see insights

Financial services Agriculture Food & Beverages Software Engineering Healthcare IT Services Advertising & marketing Other Industry Information technology Research Consumer Products Media

Was this helpful?

Average Project Cost Breakdown

$200,000 to $999,999 (8) $50,000 to $199,999 (6) $10,000 to $49,000 (4) $1,000,000 to $9,999,999 (4) Less than $10,000 (1)

What Clients Have Said
Clients have consistently praised Altoros for offering good value for money, highlighting their competitive pricing and high-quality deliverables. One client noted, 'Great culture fit and good value for cost,' while another emphasized, 'Their pricing is impressive.' Overall, feedback indicates that Altoros effectively balances cost with quality, making them a reliable choice for various projects, as evidenced by long-term partnerships and repeat engagements.
Read All Reviews

Was this helpful?

View projects from:

United States (15) Norway (2) Switzerland (2) Australia (2) Germany (2) Finland (1) Israel (1) Poland (1) Singapore (1) South Africa (1) Sweden (1) Denmark (1) Canada (1) England (1)

Was this helpful?

Review Rating from Clients

5.0/5.0

Quality

4.5

Schedule

4.5

Cost

4.5

Willing to Refer

5.0

Reviewers in Espoo praise Altoros for their high-quality SaaS and mobile app solutions, emphasizing their agile development process and proactive communication. Their team efficiently managed complex projects, ensuring timely delivery and innovative features, making them a reliable partner for tech-driven initiatives.
Read Local Reviews

Was this helpful?

View Profile
TX Tomorrow Explored Oy

5.0 3 reviews

Undisclosed

$100 - $149 / hr

10 - 49

Helsinki, Finland

Services provided

50% Blockchain

25% Blockchain Marketing

25% UX/UI Design

TX Tomorrow Explored Oy is a Blockchain Development company specializing in blockchain solutions, tokenomics, and smart contract development. Client feedback highlights their meticulous project management and quality of deliverables, with 100% of reviews praising their attention to detail and effective communication. Clients appreciate their structured discovery process, leading to successful outcomes in decentralized system development.

See all 3 projects
Reviews mention Timely
The sentiment regarding the timeliness of TX Tomorrow Explored Oy's delivery is overwhelmingly positive. Clients highlighted their ability to deliver projects on time, with one stating they 'always delivered on time' and another noting their 'quick turnaround on iterations.' The consistent feedback reflects a strong commitment to meeting deadlines and responding promptly to client needs, contributing to overall satisfaction with their services.

Blockchain Development for Blockchain Company

5.0 Mar 31, 2023

They kept diligent notes of our conversations, made changes according to feedback, and had a quick turn around on iterations.
Read Full Review

Web3 Design & Dev Services for Decentralized Data Network

5.0 Mar 16, 2023

TX Tomorrow Explored Oy always delivered on time and listened carefully to our needs. They also helped us understand some unknown unknowns that has saved us a lot of time and money over the years.
Read Full Review

Read All Reviews

Was this helpful?
2 of 2 Blockchain reviews are 5 stars

$50,000 – $199,999 avg. project cost

Blockchain PROJECT HIGHLIGHT

Blockchain Development for Blockchain Company
5.0 — A blockchain company hired TX Tomorrow Explored Oy to draft a whitepaper that memorialized their tokenomics model. Read more
Read 2 Reviews

Was this helpful?

Industry Experience

TX Tomorrow Explored Oy has demonstrated expertise in the IT Services and Software industries, particularly in blockchain and Web3 technologies. Clients praise their collaborative approach, attention to detail, and ability to refine value propositions. Their strengths include effective project management and a strong understanding of tokenomics and decentralized networks. Overall sentiment is highly positive, making them a suitable choice for projects in logistics, AI, and decentralized data solutions.
Read All Reviews

Select Industry to see insights

IT Services Software

Was this helpful?

View projects from:

United States (2) Switzerland (1)

Was this helpful?
View Profile
Keytech OY

5.0 1 review

$10,000+

$50 - $99 / hr

10 - 49

Helsinki, Finland

Services provided

10% Blockchain

50% Mobile App Development

20% IoT Development +2 services

10% E-Commerce Development

10% Web Development

Keytech OY is a web and mobile app development company known for its effective project management and cost-efficient services. With a small team of 2-5 employees, 100% of reviewers highlight their experienced team and ability to integrate with existing software. However, 100% of reviewers also suggest improving communication regarding project updates.

See all 1 projects

Industry Experience

Keytech OY has garnered positive feedback in the automotive industry, specifically for their web and mobile application development services. Clients highlight their expertise in enhancing operational efficiency and communication within car service companies. The overall sentiment reflects satisfaction with their project management and value for cost, though suggestions for improving communication on deliverables were noted. This indicates that potential clients in the automotive sector can expect a reliable partnership focused on technological improvements.
Read All Reviews

Select Industry to see insights

Automotive

Was this helpful?

Average Project Cost Breakdown

$50,000 to $199,999 (1)

What Clients Have Said
Keytech OY is noted for providing good value for cost, as highlighted by a client who appreciated their pricing fitting within budget constraints. The client emphasized the company's effective project management and the positive outcomes, including time and cost savings. Overall, sentiment regarding pricing and value indicates satisfaction, though there is a suggestion for improved communication about project updates.
Read All Reviews

Was this helpful?

View Profile

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

Get My Matches

Oivan

4.5 13 reviews

$10,000+

$50 - $99 / hr

50 - 249

Helsingfors, Finland

Services provided

10% Blockchain

25% Web Development

15% Custom Software Development +5 services

15% Cybersecurity

15% Mobile App Development

10% Application Management & Support

5% Cloud Consulting & SI

5% UX/UI Design

Oivan is a versatile IT solutions provider, offering services in IT infrastructure assessment, software and web development, mobile app development, and custom CMS solutions. Across the reviews, clients praise Oivan for their flexibility, resourcefulness, and ability to understand business needs, with approximately 90% of feedback being positive. They are noted for delivering practical recommendations and effective communication, though suggestions for improvement include enhancing local expertise and addressing initial communication hiccups.

See all 13 projects
Reviews mention Knowledgeable
Clients have consistently praised Oivan for their knowledgeable approach, highlighting their understanding of both technical and business aspects. One client noted that Rami Korhonen, the founder, demonstrated a clear grasp of their business model, providing valuable insights beyond mere software development. The ability to align with client needs and offer sound business advice was deemed impressive, marking Oivan as a knowledgeable partner in their projects.

WordPress Dev for Performing Arts Site

4.5 Sep 26, 2017

It was critical that we be on the same page from the beginning, and they were able to provide good business advice, not just technical knowledge. Fortunately, we had a fruitful start. Based on my discussions with other IT or tech people, this is not typical. Rami understood the business side as well, which was nice.
Read Full Review

Read All Reviews

Was this helpful?
Industry Experience

Oivan has demonstrated extensive expertise across diverse industries including Financial Services, Real Estate, Education, and Arts & Entertainment. Clients commend their ability to deliver tailored IT infrastructure solutions in Financial Services, effective project management in Real Estate, and user-friendly app development in Education and Arts sectors. Overall sentiment reflects a strong capability in understanding client needs, providing innovative solutions, and maintaining collaborative communication, positioning them as a suitable partner for companies in these fields.
Read All Reviews

Select Industry to see insights

Financial services IT Services Arts, entertainment & music Real estate Education Nonprofit Other Industry

Was this helpful?

View projects from:

Finland (10) Saudi Arabia (1) Thailand (1)

Was this helpful?

Review Rating from Clients

4.4/5.0

Quality

4.5

Schedule

4.2

Cost

4.4

Willing to Refer

4.8

Finnish clients commend IWA for their reliable, flexible approach in creating mobile apps, web systems, and UI/UX designs. Their team’s deep understanding of local markets and effective project execution have resulted in successful, well-received solutions for startups, NGOs, and established companies alike.
Read Local Reviews

Was this helpful?
View Profile
Blockchain Business Security Solutions Finland

Not yet reviewed

$100,000+

$300+ / hr

2 - 9

Helsinki, Finland

Services provided

100% Blockchain

Blockchain company Blockchain Business Security Solutions Finland was founded in 2022. The team focuses on Blockchain and is based in Helsinki, Finland.
Read more

View Profile
Nordivo

Not yet reviewed

$10,000+

$50 - $99 / hr

10 - 49

Helsinki, Finland

Services provided

100% Blockchain

Nordivo is a small Helsinki, Finland-based Blockchain company. Their services include Blockchain.
Read more

View Profile
Seita Technologies Oy

Not yet reviewed

Undisclosed

Undisclosed

10 - 49

Helsinki, Finland

Services provided

40% Blockchain

20% Custom Software Development

10% E-Commerce Development +3 services

10% IT Managed Services

10% IT Strategy Consulting

10% Mobile App Development

Seita Technologies Oy is a Helsinki, Finland-based Blockchain company. Launched in 2012, the team provides Blockchain and Custom Software Development.
Read more

View Profile
HeyDay Pro

Not yet reviewed

$5,000+

$100 - $149 / hr

10 - 49

Helsinki, Finland

Services provided

25% Blockchain

25% AR/VR Development

20% BI & Big Data Consulting & SI +2 services

15% AI Development

15% IoT Development

Established in 2000, HeyDay Pro is a small Helsinki, Finland-based AR/VR development company. Their team provides AR/VR development and Blockchain.
Read more

View Profile

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

Get My Matches

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

Proven

Market Leaders

Emerging

Niche

Clutch Leaders Matrix

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

1 Altoros

2 TX Tomorrow Explored Oy

3 Keytech OY

4 Oivan

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 Helsinki Blockchain Development Companies

Altoros

$25,000+

$50 - $99 / hr

250 - 999

Helsinki, Finland

Ability to deliver

35.7/40.0

16.2/20 Reviews

10/10 Clients & Experience

9.5/10 Market Presence

Service focus

40% Blockchain

60% Other

View Profile Visit Website
TX Tomorrow Explored Oy

Undisclosed

$100 - $149 / hr

10 - 49

Helsinki, Finland

Ability to deliver

31.4/40.0

16.2/20 Reviews

9.9/10 Clients & Experience

5.3/10 Market Presence

Service focus

50% Blockchain

50% Other

View Profile Visit Website
Keytech OY

$10,000+

$50 - $99 / hr

10 - 49

Helsinki, Finland

Ability to deliver

23.7/40.0

16.2/20 Reviews

2.2/10 Clients & Experience

5.3/10 Market Presence

Service focus

10% Blockchain

90% Other

View Profile Visit Website
Oivan

$10,000+

$50 - $99 / hr

50 - 249

Helsingfors, Finland

Ability to deliver

23.4/40.0

14.6/20 Reviews

3.6/10 Clients & Experience

5.2/10 Market Presence

Service focus

10% Blockchain

90% Other

View Profile Visit Website
Blockchain Business Security Solutions Finland

$100,000+

$300+ / hr

2 - 9

Helsinki, Finland

Ability to deliver

4/40.0

0/20 Reviews

0/10 Clients & Experience

4/10 Market Presence

Service focus

100% Blockchain

View Profile Visit Website
Nordivo

$10,000+

$50 - $99 / hr

10 - 49

Helsinki, Finland

Ability to deliver

4/40.0

0/20 Reviews

0/10 Clients & Experience

4/10 Market Presence

Service focus

100% Blockchain

View Profile Visit Website
Seita Technologies Oy

Undisclosed

Undisclosed

10 - 49

Helsinki, Finland

Ability to deliver

0/40.0

0/20 Reviews

0/10 Clients & Experience

0/10 Market Presence

Service focus

40% Blockchain

60% Other

View Profile Visit Website
HeyDay Pro

$5,000+

$100 - $149 / hr

10 - 49

Helsinki, Finland

Ability to deliver

0/40.0

0/20 Reviews

0/10 Clients & Experience

0/10 Market Presence

Service focus

25% Blockchain

75% Other

View Profile Visit Website

Similar Categories

Related Services

AR/VR in Helsinki IoT in Helsinki Ruby on Rails in Helsinki Software Testing in Helsinki Web Developers in Helsinki Software Developers in Helsinki Mobile App Development in Helsinki eCommerce in Helsinki Artificial Intelligence in Helsinki

Specialties

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

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

Top Blockchain Companies & Developers in Helsinki

List of the Top Helsinki Blockchain Development Companies

Reviews mention Creative

Web & Mobile App Development for Content Management Company

Blockchain Platform Dev for Real Estate Investment Platform

Average Project Cost Breakdown

What Clients Have Said

Nextrope is very responsive

Reviews mention Adaptable

Blockchain Development for FinTech Company

Blockchain Development for FinTech Company

RedDuck is very responsive

Industry Experience

Select Industry to see insights

Average Project Cost Breakdown

What Clients Have Said

Reviews mention Timely

Blockchain Development for Blockchain Company

Web3 Design & Dev Services for Decentralized Data Network

Blockchain Development for Blockchain Company

Industry Experience

Select Industry to see insights

Industry Experience

Select Industry to see insights

Average Project Cost Breakdown

What Clients Have Said

Reviews mention Knowledgeable

WordPress Dev for Performing Arts Site

Industry Experience

Select Industry to see insights

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

Why Trust Clutch

List of the Top 4 Helsinki Blockchain Development Companies

Similar Categories

Related Services

Specialties