I checked 106 companies with an office in Warsaw that show fintech work in at least one source (106 by their Clutch profile) against the court register, their latest filing and their employee reviews. 51 meet the ranking criteria, and the 10 highest scores are below. I sell the alternative: one senior engineer working with AI agents.
In short: The highest-scoring fintech software houses in Warsaw for 2027 are LeanCode (score 89), ISOLUTION (score 87) and Sunscrapers (score 86). 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.
LeanCodeBanks and large brands that have chosen Flutter and want the team behind Patrol, an open source Flutter testing tool. Fintech is 60% of client industries on its Clutch profile. Score 89, 5.0 on Clutch from 40 reviews, profit in 2025.
ISOLUTIONBank, insurer or public body that needs Java development plus GDPR, whistleblowing and security work. Fintech is 55% of client industries on its Clutch profile. Score 87, 5.0 on Clutch from 7 reviews, profit in 2025.
SunscrapersVC firms and data-heavy SaaS companies that need Python, Django and data pipeline work. Fintech is 50% of client industries on its Clutch profile. Score 86, 4.9 on Clutch from 32 reviews, profit in 2025.
InnowiseTeams that must add several developers quickly and can manage an outsourced team under their own tech lead. Fintech is 30% of client industries on its Clutch profile. Score 82, 4.9 on Clutch from 73 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 fintech work; the share on Clutch is what the company declares.
The order below is the score from five axes: transparency, client reputation, stability, specialization and activity. Here specialization measures how deep the company goes into fintech (its share of the Clutch profile and of open roles) and weighs 35% instead of 15%, so specialists rank above large generalists. 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.
1
LeanCode
Warsaw Flutter specialist that builds mobile apps for banks and large brands and created the Patrol testing framework.
Flutter mobile app developmentWeb and custom software (.NET, React)Scoping and design thinking workshopsMobile app auditsAutomated UI testing with PatrolFlutter training
Homepage of leancode.co, screenshot taken October 28, 2026. Content and marks belong to LeanCode.
2
ISOLUTION
Warsaw Java software house running custom projects, team leasing and its own compliance and cloud products.
Best for: Bank, insurer or public body that needs Java development plus GDPR, whistleblowing and security work.
Verdict. Pick ISOLUTION for a Java system in banking or insurance that needs GDPR and whistleblower compliance. Ask for named references first.
Pros
Sells its own compliance products, Esignaller for whistleblowing and Wizards for test data anonymization.
Offers security audits and penetration tests next to Java development.
Revenue reached 27M PLN in 2025.
Clutch shows 5.0 from 7 reviews.
Cons
Lists team leasing among its IT services, so part of the business is body leasing.
The site names no clients and shows no energy-sector work.
Thin margin in 2025, with 619K PLN of profit on 27M PLN of revenue.
From their website and Clutch profile
The home page claims over 100 employees, over 150 projects and over 100 clients (source).
The solutions page lists Esignaller for the EU whistleblower directive and Wizards for anonymizing test data (source).
Cloud services include security audits and penetration tests, with team leasing listed under IT services (source).
The site names no clients, and its case studies describe a bank and a top-three Polish insurer without names (source).
Custom software development (Java)Team leasingCloud advisory, security audits and penetration testsEsignaller whistleblower platformWizards personal data anonymizationIT training and Enterprise Architect
Homepage of isolution.pl, screenshot taken October 28, 2026. Content and marks belong to ISOLUTION.
3
Sunscrapers
Warsaw Python and data engineering house building software for venture capital firms, health tech and SaaS companies.
Best for: VC firms and data-heavy SaaS companies that need Python, Django and data pipeline work.
Verdict. Choose Sunscrapers for Python data platforms, deal sourcing tools or ETL work. For a mobile-first consumer app, pick a team with mobile case studies.
Pros
Revenue was 17.7M PLN in 2025, with a profit of 485K PLN.
The site claims 200+ projects and 50+ clients since 2010.
Case studies name 15Five, Codility and COTA.
Clutch shows 4.9 from 32 reviews.
Cons
GoWork has 11 negative and 6 positive entries, with 2 mentions of layoffs.
The minimum project on Clutch is 25,000 USD.
It also sells dedicated teams, so agree on who owns delivery.
From their website and Clutch profile
The footer names Sunscrapers sp. z o.o. at Tadeusza Czackiego 15/17 in Warsaw. (source)
The about page says the company was founded in 2010 and lists 40+ team members, 50+ clients and 200+ projects. (source)
The about page claims scaleup clients raised 280M USD. (source)
Featured case studies include 15Five, COTA and Codility. (source)
Best for: Teams that must add several developers quickly and can manage an outsourced team under their own tech lead.
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.
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).
Best for: Banks, telecoms and large retailers that need integration, data platforms or managed services from a vendor with a corporate owner.
Verdict. Pick BlueSoft for corporate integration, data and managed services backed by a telecom group. For a startup or a single small product, it is too heavy.
Pros
BlueSoft reported 300.9M PLN of revenue and a profit of 43.8M PLN in 2025.
Orange Polska has owned BlueSoft since 2019, which helps with procurement and continuity.
Named case studies cover Canal+, Biedronka, GATX and Hellenic Cables. Clutch shows 4.8 from 13 reviews.
One of the biggest recruiters on the job boards in this set.
Cons
GoWork employee reviews are negative (13 positive, 39 negative), with 2 mentions of layoffs.
The minimum project is 50,000 USD and the processes are enterprise-grade, so an MVP is a poor fit.
Many case studies are for Orange companies, the owner, so outside references are fewer than they look.
From their website and Clutch profile
BlueSoft has belonged to the Orange Polska group since 2019, together with Craftware and Essembli (source).
Several case studies are for Orange companies, the owner, next to clients such as Canal+, Biedronka and GATX (source).
The site claims 1000+ experts and 200+ active clients and says it is hiring 118 people (source).
The site shows partner logos for AWS, Microsoft, Google, MuleSoft, Salesforce and Databricks (source).
Product discoveryUX/UI designMobile development (iOS, Android, Flutter)Web and back-end developmentSupport and maintenance teamManaged teams and staff augmentation
Homepage of itcraftapps.com, screenshot taken October 28, 2026. Content and marks belong to itCraft.
10
Relevant Software
Software development and consulting firm from Lviv with a Warsaw office, building custom platforms, IoT and AI products.
Full-cycle software developmentDedicated development teamsAI and machine learningIoT development and consultingData and BISecurity and compliance (HIPAA, penetration testing)AI
Homepage of relevant.software, screenshot taken October 28, 2026. Content and marks belong to Relevant Software.
Every company we checked
The table below has the 106 companies with fintech evidence in Warsaw, including the ones that do not qualify for the ranking, with the reason. Sort by any column.
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 10, 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.
Geniusee (paid)
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.
KITRUM
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.
EffectiveSoft
RevoTech PRO
DevTalents
Website not confirmed
The website could not be tied to the registered company. Without that I cannot tell whose filing and reviews I am reading, so the company is not ranked.
NG Logic
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.
Solvd
Clurgo
GLOBALDEV
Order Group
YND
Andersen
WEBSENSA
Mobile Reality
N7 Mobile
Elinext
ITSG Global
Darly Solutions
+ 29 more in the full table
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.
Neontri
Finture
MintyMint
SoftwiseAI
TUATARA
CROSS · Opole
AA
Processifier
Weak evidence for fintech
They meet the data criteria, but the topic rests on a small Clutch share, a few job ads or a single source. They may do it; the data just does not show it.
The Codest
10Clouds Financial Institutions
Ftech-it
Itexus
Quantum
RNDpoint
Aligned Code
KnubiSoft
LINKERSOFT GROUP
Sunmait Technologies
Symfa
Smartym Pro
+ 29 more in the full table
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/h32
50-99 USD/h67
100-149 USD/h4
150-199 USD/h0
Rates declared on Clutch, 103 companies with an office in the city.
Check any agency yourself in 10 minutes
Ask about PSD2, DORA and audits they passed with a client, and who signs the outsourcing agreement your regulator needs. Fintech experience on a profile often means one payments integration.
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.
Read the last financial statement in the Financial Documents Repository (free, by KRS number): revenue, profit or loss, and whether it was filed on time.
Check the VAT white list: active, and the name matches the contract.
On the Clutch list hover over the company link; a link through ppc.clutch.co is an ad. Then read the reviews themselves.
On GoWork read the employee reviews, not the stars, and look for layoffs and rotation.
Ask who exactly will work on your project, and check those people on LinkedIn.
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Questions
What are the best fintech software houses in Warsaw in 2027?
By the score on this page: 1. LeanCode (89), 2. ISOLUTION (87), 3. Sunscrapers (86), 4. Innowise (82), 5. BlueSoft (82). 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 fintech 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 fintech?
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.
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 and the Financial Documents Repository 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
Until November 2026 I work at Sanddev (Wrocław) as the founding engineer of its Sandtime product. 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.
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.
“a true bias for action” client CTO, public LinkedIn recommendation
Confidential by default. NDA is standard. I never show your project, name or screenshots without written consent, which is why this site names no clients without permission.
Your code, your accounts. Code and data stay in your repository and accounts. AI tools run with training on your data turned off, and secrets never reach a model.
A handover you can use. Every project ends with the same checklist: a README that gets it running, one architecture diagram, written decisions, CI, a runbook and a recorded walkthrough. It is done when someone outside the project can run it from the docs.
Boring technology where it counts. I pick a stack you can hire for. Anything experimental needs your yes and an exit plan.
Approach matched to your risk appetite. Prototype, product or regulated: the level decides how much autonomy the agents get and how much review and validation each change needs.
Everything checkable. Every number on my pages links to its source. My tools are free, and the idea validator skill is open source (MIT).
My pledge
Reply within 24 hours. I reply within 24 hours on working days, personally, not a bot. Weekend messages: by Monday noon.
Late means free. If I am late, the first hour of work is free. You do not have to ask.
Scope in writing within 24 hours. A free 30-minute call with no company deck, then the scope and the price in writing within 24 hours. You decide.
The person who does the work. You talk to the person who does the work. No sales layer, no handoff.
Follow-up only with news. I follow up only when I have something new for you. Never a "did you see my offer".
Honest "not a fit". If I am not the right person, I say so on the call and point you to someone who is.
LeanCode
