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Blockchain in Warsaw, ranked for 2027

Best blockchain software houses in Warsaw

Przemysław Zalewski·Data verified: ·21 min read

Ask for audited smart contracts on mainnet and who did the audit. Blockchain agencies come and go with the market cycle, so check the company age and filings. I found 19 companies with an office in Warsaw that show blockchain work in at least one source (19 by their Clutch profile), and checked each in the court register, its latest filing and its employee reviews. 16 meet the ranking criteria and the 6 highest scores are below. I sell the alternative: one senior engineer working with AI agents.

In short: The highest-scoring blockchain software houses in Warsaw for 2027 are Innowise (score 84), Evojam (score 78) and SENLA (score 75). The 0 to 100 score combines court register data, the latest financial statement, Clutch client reviews, GoWork employee reviews and open roles on the job boards. Paid Clutch positions do not count.

Get matched offers in 24 hoursSee the top 6Download the data (CSV)

  • 19companies checked
  • 6verified in KRS
  • 6with a financial statement
  • 7with an employee review profile
  • 6ranked

Which company fits your project

  • InnowiseBlockchain is 10% of service lines on its Clutch profile. Score 84, 4.9 on Clutch from 73 reviews, profit in 2025.
  • EvojamBlockchain is 20% of service lines on its Clutch profile. Score 78, 4.9 on Clutch from 12 reviews, profit in 2025.
  • SENLABlockchain is 15% of service lines on its Clutch profile. Score 75, 4.9 on Clutch from 19 reviews, profit in 2025.
  • CowchainBlockchain is 40% of service lines on its Clutch profile. Score 74, 5.0 on Clutch from 36 reviews, profit in 2025.
  • One senior instead of a teamIf the project fits one person with coding agents, compare the cost before you pay an agency margin.

The picks come from the data in the full table, not from who paid. A company enters this list when at least one source shows blockchain work; the share on Clutch is what the company declares.

The top 6 at a glance

Click a column to sort.

#CompanyPeopleClutchRateFocusScore
1
Innowiseprofit 3M PLN (2025)GoWork 65/10
1000-99994.9 · 7350–99 USD/hCustom software84
2
Evojamprofit 95K PLN (2025)GoWork 6/1
10-494.9 · 1250–99 USD/hCustom software78
3
SENLAprofit 1.7M PLN (2025)
250-9994.9 · 1925–49 USD/hStaff augmentation75
4
Cowchainprofit 83K PLN (2025)
50-2495.0 · 3625–49 USD/hWeb3 full-stack74
5
Computoolsloss 387K PLN (2025)
250-9994.9 · 10625–49 USD/hIT consulting and business analysis66
6
Interexyloss 16K PLN (2025)
250-9994.9 · 7425–49 USD/hAI66

The ranking

The order below is the score from five axes: transparency, client reputation, stability, specialization and activity. Here specialization measures how strong the blockchain evidence is. Weights and the full method are on the guide page.

Financial figures come from the latest filing of the Polish company. For subsidiaries of foreign groups they can be far from the size of the real business. Open the sources under each entry before you shortlist.

Innowise

Very large outsourcing and staff augmentation company with a Warsaw headquarters claim and a catalog covering almost every technology.

Clutch: 4.9 (73 reviews)Rate: 50–99 USD/hMin. project: 10,000 USD

Best for: Teams that must add several developers quickly and can manage an outsourced team under their own tech lead.

Pros

  • The Polish company reported 251.2M PLN of revenue and a profit of 3.0M PLN in its 2025 filing.
  • Clutch shows 4.9 from 73 reviews.
  • GoWork employee reviews lean positive, with 65 positive and 10 negative.
  • The site lists ISO 9001, ISO 27001 and ISO 13485.

Cons

  • The margin is thin, with profit at about one percent of revenue.
  • The case studies page names no clients and warns that details may be generalized or modified. The portfolio cannot be checked.
  • The Polish company dates from 2021, while the site claims 2007. The footer gives a registered address in Boston, and the job boards showed no open roles at the last snapshot.

From their website and Clutch profile

  • The about page claims 3,500+ people, 1,600 projects and a founding year of 2007. The Polish company in KRS dates from 2021 (source).
  • The FAQ names Warsaw as headquarters, while the footer gives a registered address in Boston, MA (source).
  • The case studies page names no clients and warns that client details may be generalized or modified (source).
  • Innowise sells staff augmentation openly, promising CVs in 1 to 2 days and a team joining in 3 to 5 days (source).

Clients they name: Hays, Spar, Tietoevry, Topcon, NTT Data, Commercial Bank of Qatar

Custom software developmentStaff augmentation and dedicated teamsTesting and QAData, AI and MLERP and CRMLegacy modernizationAI
Innowise homepage
Homepage of innowise.com, screenshot taken October 28, 2026. Content and marks belong to Innowise.

Verdict. Use Innowise for staff augmentation under your own tech lead when you need CVs fast across many technologies. Skip it when you need a partner whose past work you can verify.

Evojam

Warsaw software consultancy working since 2014, building web and mobile apps for startups and real estate companies.

Clutch: 4.9 (12 reviews)Rate: 50–99 USD/hMin. project: 10,000 USD

Best for: Proptech firms and startups that need an MVP or a TypeScript platform, blockchain included, starting with discovery.

Pros

  • GoWork reviews lean positive, with 6 positive entries against 1 negative.
  • Clutch shows 4.9 from 12 reviews.
  • Named clients include Autogala, Kompas Inwestycji and Taskworld.
  • Clutch puts 75% of its work in custom software and 20% in blockchain.

Cons

  • Profit in 2025 was 95K PLN on 5.3M PLN of revenue, a thin margin.
  • Several case studies describe clients only by city, without a name.

From their website and Clutch profile

  • The home page names startups and real estate as its primary focus since 2014. (source)
  • Case studies include a blockchain protocol in Scala for a San Francisco company and an anti-piracy video system. (source)
  • The Autogala app was built by a designer, five developers and a project manager. (source)
  • The privacy policy gives KRS 0000522575, matching the register. (source)

Clients they name: Autogala, Kompas Inwestycji, Enthought, Otro Global, Buildo, Virtual Control, Taskworld

Custom software developmentProduct discovery workshopsUX/UI designCode and architecture auditsERP and CRM with Open MercatoESG data and digital twins for proptech

Verdict. Pick Evojam for a proptech or startup MVP with discovery up front. Skip it if you need a large team fast.

SENLA

Outsourcing group that rents engineers through staff augmentation, dedicated teams and development centers, with a Warsaw office.

Clutch: 4.9 (19 reviews)Rate: 25–49 USD/hMin. project: 10,000 USD

Best for: Media or telecom company that wants to rent developers at $25–49 per hour and manage them in-house.

Pros

  • The site claims more than 800 technical experts, so it can staff a team quickly.
  • Profitable in 2025, with 1.7M PLN of profit on 25.8M PLN of revenue.
  • Clutch shows 4.9 from 19 reviews at $25–49 per hour.
  • Case studies name Bosch and Bayer.

Cons

  • Mainly staffing and body leasing, with staff augmentation and development centers as the main offers.
  • The old senlainc.com domain redirects to the Russian-language senla.ru, so ask where engineers sit and where data goes.
  • Certification and award headings on the site list nothing.

From their website and Clutch profile

  • The about page sells three engagement models, staff augmentation, dedicated team and development center (source).
  • The site lists Przyokopowa 31 in Warsaw, the same address as in KRS (source).
  • The site claims more than 800 technical experts and over 1,000 projects since 2012 (source).
  • The older senlainc.com domain redirects to senla.ru, a Russian-language site of the same brand (source).

Clients they name: Bosch, Bayer, We4G, Banx.one

Staff augmentationDedicated teamsDevelopment centersBackend and frontend developmentMobile developmentSalesforce and SAP Hybris

Verdict. Pick SENLA to add engineers to a team you already run, at a low rate. Skip it if you need a product partner.

Cowchain

Web3 development team building dApps, smart contracts, DeFi and AI agent platforms for crypto startups.

Clutch: 5.0 (36 reviews)Rate: 25–49 USD/hMin. project: 25,000 USD

Best for: Crypto startup that needs a DeFi protocol, bridge or dApp built by a Web3 team.

Pros

  • Works only in Web3, with dApps, DeFi and smart contracts as core work.
  • Clutch shows 5.0 from 36 reviews.
  • Shows shipped products such as RetroBridge, with $200M bridged volume.
  • Clutch lists rates of $25 to $49 an hour.

Cons

  • The Polish company reported only 109K PLN of revenue in 2025 while the site claims 50+ developers.
  • The site lists no address or legal entity, so check who signs the contract.
  • The site shows little Rust or embedded C++ work.

From their website and Clutch profile

  • The site gives no address or legal entity, only the name Cowchain Co. in the footer. (source)
  • The home page claims 50+ Web3-native developers. (source)
  • The RetroBridge case claims $200M bridged volume and 1M+ transactions. (source)
  • GoodFirms lists cowchain.io at Chałubińskiego 8 in Warsaw, the KRS address. (source)

Clients they name: RetroBridge, StepApp, GMX Blueberry Club, agnt.hub, Hybrid

Web3 full-stack developmentSmart contracts and DeFiBlockchain consultingWhite-label solutionsWeb3 UI/UX designSmart contract security audits
Cowchain homepage
Homepage of cowchain.io, screenshot taken October 28, 2026. Content and marks belong to Cowchain.

Verdict. Pick Cowchain for a Web3 product built by a crypto-native team, after checking the contracting entity. Skip it outside blockchain.

Computools

US-headquartered IT consulting and software firm with a Warsaw office, 250+ engineers and a blockchain practice.

Clutch: 4.9 (106 reviews)Rate: 25–49 USD/hMin. project: 25,000 USDVerified

Best for: Fintech startups that need a crypto exchange or lending MVP from a large outsourcing team.

Pros

  • Clutch shows 4.9 from 106 reviews.
  • Shows ISO 9001 and ISO 27001 on its site.
  • Has built a crypto exchange MVP and a crypto lending marketplace.
  • Clutch lists rates of $25 to $49 per hour.

Cons

  • The Polish company lost 387K PLN in 2025 on 1.6M PLN of revenue.
  • The privacy policy names a US company as data controller, so check which entity signs your contract.
  • The Warsaw address on the site differs from the one in KRS.

From their website and Clutch profile

  • The privacy policy names Computools LLC in Delaware as data controller (source).
  • The locations page lists a Warsaw office at Al. Jerozolimskie 81, while KRS registers the Polish company at Branickiego 21 (source).
  • The home page shows two crypto projects, the CryptoTrade exchange MVP and the Crypdrift lending marketplace (source).
  • The about page dates Computools to 2013, while the Polish company entered KRS in 2021 (source).

Clients they name: Visa, Epson, IBM, Dior, Bombardier, British Council

IT consulting and business analysisAI developmentBlockchain developmentWeb and mobile developmentDevOps, QA and cloud migrationDedicated teamsAI
Computools homepage
Homepage of computools.com, screenshot taken October 28, 2026. Content and marks belong to Computools.

Verdict. Pick Computools for a crypto or fintech MVP when a large distributed team suits you. Check which entity signs the contract before you start.

Interexy

Clutch: 4.9 (74 reviews)Rate: 25–49 USD/hMin. project: 10,000 USDVerified

Pros

  • Owned by private individuals (KRS)
  • 4.9 on Clutch from 74 reviews

Cons

  • Loss of -16K PLN (2025)
AI
Interexy homepage
Homepage of interexy.com, screenshot taken October 28, 2026. Content and marks belong to Interexy.

Verdict. Strongest on transparency and client reputation. Weakest axis: stability (1.3/5).

Every company we checked

The table below has the 19 companies with blockchain evidence in Warsaw, including the ones that do not qualify for the ranking, with the reason. Sort by any column.

Show all 19 companies
Size: Rate: · 19
#CompanyHQ (KRS)PeopleClutchRateRevenueProfitFocusScoreLinks
1
InnowiseCustom software
Warsaw1000-99994.9 · 7350–99 USD/h251.2M PLN3M PLNCustom software84WebsitePortfolioClutchKRS
2
EvojamCustom software
Warsaw10-494.9 · 1250–99 USD/h5.3M PLN95K PLNCustom software78WebsitePortfolioClutchKRS
3
SENLAStaff augmentation
Warsaw250-9994.9 · 1925–49 USD/h25.8M PLN1.7M PLNStaff augmentation75WebsitePortfolioClutchKRS
4
CowchainWeb3 full-stack
Warsaw50-2495.0 · 3625–49 USD/h109K PLN83K PLNWeb3 full-stack74WebsitePortfolioClutchKRS
5
ComputoolsIT consulting and business analysis
Warsaw250-9994.9 · 10625–49 USD/h1.6M PLN-387K PLNIT consulting and business analysis66WebsitePortfolioClutchKRS
6
Warsaw250-9994.9 · 7425–49 USD/h1.2M PLN-16K PLNAI66WebsiteClutchKRS
–
Infograins Software Solutionstoo little client evidence
n/a250-9994.9 · 8950–99 USD/hn/an/aAI50WebsiteClutch
–
Altorostoo little client evidence
n/a250-9994.8 · 3450–99 USD/hn/an/a45WebsiteClutch
–
Dashbouquet Developmenttoo little client evidence
n/a50-2494.9 · 3450–99 USD/hn/an/aAI45WebsiteClutch
–
Novus Teamtoo little client evidence
n/a10-495.0 · 1250–99 USD/hn/an/a45WebsiteClutch
–
PixelPlextoo little client evidence
n/a50-2494.9 · 3350–99 USD/hn/an/aAI45WebsiteClutch
–
Wise Visiontoo little client evidence
n/a50-2495.0 · 1225–49 USD/hn/an/a44WebsiteClutch
–
GO ONLINEtoo little client evidence
n/a10-495.0 · 1125–49 USD/hn/an/aAI43WebsiteClutch
–
Symfatoo little client evidence
n/a50-2494.9 · 1850–99 USD/hn/an/aAI43WebsiteClutch
–
UASOFTDEVtoo little client evidence
n/a50-2495.0 · 1125–49 USD/hn/an/aAI43WebsiteClutch
–
CROSStoo little client evidence
Opole50-2495.0 · 250–99 USD/hn/an/aAI42WebsiteClutch
–
INtoo little client evidence
n/a10-495.0 · 425–49 USD/hn/an/aAI42WebsiteClutch
–
Smartym Protoo little client evidence
n/a10-494.7 · 1525–49 USD/hn/an/a40WebsiteClutch
–
Madifftoo little client evidence
n/a50-2494.9 · 450–99 USD/hn/an/aAI39WebsiteClutch

All companies in the data set, with the same score. Companies without a confirmed office, sole traders, body-leasing firms and product companies are listed but not ranked.

Who is not in the top 6, and why

Paid placements and “serves the city” without an office

On the Clutch city list the first positions are bought with ads (links through ppc.clutch.co) or a “serves” entry. These companies have no office in the city according to KRS or their own site, so they are not ranked here.

None in this city.

Struck off the register or in liquidation

They still show up on other people’s “best of” lists. Here they appear only in the full table.

None in this city.

Body leasing, product companies and other services

Renting people into someone else’s team is a different service from delivering a project. A product company, a marketing agency or an SAP partner does not sell software projects either. They are in the full table with a label.

None in this city.

On the city’s Clutch list, but based elsewhere

Clutch shows them on this city’s page, but KRS and our data do not confirm an office here. They are ranked in their own city.

None in this city.

Ranked 11th and below

They qualify but score lower. Their full rows are in the table below; the gap between 10th and 15th is often a few points.

  • Infograins Software Solutions
  • Altoros
  • Dashbouquet Development
  • Novus Team
  • PixelPlex
  • Wise Vision
  • GO ONLINE
  • Symfa
  • UASOFTDEV
  • Smartym Pro

Too little client evidence, under 10 people, sole traders

Without 5 Clutch reviews or 2M PLN of revenue in a filing there is no fair way to compare a company with the rest. That is a data gap, not a verdict.

  • CROSS · Opole
  • IN
  • Madiff

What they charge

On Clutch, the companies in this table most often declare 50 to 99 USD an hour. The rate is what the agency bills; the developer on your project is paid less than half of it.

For comparison, my own rate is 36 to 54 USD an hour (45 USD base, pricing). The cost estimator shows what a project like yours costs with and without coding agents.

25-49 USD/h950-99 USD/h10100-149 USD/h0150-199 USD/h0
Rates declared on Clutch, 19 companies with an office in the city. In brackets: companies “serving” the city without an office.

Check any agency yourself in 10 minutes

  1. Ask for audited smart contracts on mainnet and who did the audit. Blockchain agencies come and go with the market cycle, so check the company age and filings.
  2. Find the legal entity in the National Court Register: the seat, the share capital and the shareholders. An office here with a seat in another city is a sales office, not a team.
  3. Read the last financial statement on rejestr.io: revenue, profit or loss, and whether it was filed on time.
  4. Check the VAT white list: active, and the name matches the contract.
  5. On the Clutch list hover over the company link; a link through ppc.clutch.co is an ad. Then read the reviews themselves.
  6. On GoWork read the employee reviews, not the stars, and look for layoffs and rotation.
  7. Ask who exactly will work on your project, and check those people on LinkedIn.

Get offers from the best-fit agencies

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Questions

What are the best blockchain software houses in Warsaw in 2027?

By the score on this page: 1. Innowise (84), 2. Evojam (78), 3. SENLA (75), 4. Cowchain (74), 5. Computools (66). The score adds up transparency in the court register, client reviews on Clutch, profit and stability in the latest filing, specialization and current hiring. The full table shows every company checked.

How much do blockchain agencies in Warsaw charge?

Most companies in this table declare 50 to 99 USD an hour on Clutch. My own rate as a senior engineer working with AI agents is 36 to 54 USD an hour.

How do you know a company does blockchain?

From at least one of three sources: the service, industry and framework shares on the Clutch profile, the skills in open roles on JustJoin.it, or my own Wrocław catalog. Companies with two or three sources score higher on specialization. The software house finder shows the same tags for every company.

Did any company pay to be on this list?

No. There are no paid placements and no affiliate links. The only business interest is mine: I sell senior engineering as the alternative to an agency.

Can I get my company added or corrected?

Yes. Write to ciunkos@gmail.com with the KRS number and the correction.

How this ranking was made

  • 1,485companies in the data set
  • 708checked in the National Court Register
  • 453with a financial statement
  • 7,436Clutch listing positions read, paid ones marked
  • 451employee review profiles on GoWork
  • 2+months of data collection, since September 2026

The company list comes from a full read of the Clutch city listing (every page, with paid positions marked by their ppc.clutch.co links), the ITCORNER cluster, Google results and job ads. Every company was checked in the National Court Register (KRS) for its seat, legal form, capital and shareholders, in rejestr.io for revenue and profit from the latest filing, on GoWork for employee sentiment, layoff mentions and review clusters, and on the JustJoin.it and No Fluff Jobs boards for open roles and the stack they actually pay for. The 0 to 100 score is five axes with published weights: transparency, client reputation, stability, specialization, activity. A paid Clutch placement does not raise the score.

Disclosures

  • I worked at Sanddev (Wrocław) as the founding engineer of its Sandtime product until November 2026. Sanddev appears in the full table with the same score as everyone else and no editorial favor.
  • As a contractor I have talked with, or applied to, some of the agencies on these lists. None of them knew about this ranking and none of it changed a score.
  • No agency pays for a position, there are no affiliate links, and no company has seen its entry before publication. If any of that changes, the disclosure changes first.
  • My business interest is on every page: I sell senior engineering with AI agents as the alternative to hiring an agency.
  • Written with AI (Claude) from the data set. Every number in the editorial text is checked automatically against the company record or the research notes, and every top entry was read against the company’s own website. Sources and check dates are under each entry.

Spotted an error or want your company added? Write to ciunkos@gmail.com. Full methodology and weights →

Przemysław Zalewski

About the author

Przemysław Zalewski, a senior full-stack engineer in Wrocław with 15+ years of shipping software. I ran this catalog for two months while choosing my own next clients, so every number here was useful to me before it was useful to you. I build with coding agents, work with clients in the US and the UK, and I sell the alternative to the agencies on this list.

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