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Data engineering and BI in Warsaw, ranked for 2027

Best data engineering and BI software houses in Warsaw

Przemysław Zalewski·Data verified: ·23 min read

Ask for the data model and the pipeline tests, not the dashboards. Dashboards are cheap; trustworthy numbers come from the plumbing behind them. I found 55 companies with an office in Warsaw that show data engineering and BI work in at least one source (40 by their Clutch profile, 23 by their open roles on JustJoin.it), and checked each in the court register, its latest filing and its employee reviews. 29 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 data engineering and BI software houses in Warsaw for 2027 are Itransition (score 87), Innowise (score 84) and BlueSoft (score 84). 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 10Download the data (CSV)

  • 55companies checked
  • 33verified in KRS
  • 26with a financial statement
  • 33with an employee review profile
  • 1paid or office-less positions excluded

Which company fits your project

  • ItransitionData engineering and BI is 10% of service lines on its Clutch profile. 7 open roles with data engineering and BI in the requirements. Score 87, 4.9 on Clutch from 42 reviews, profit in 2025.
  • InnowiseData engineering and BI is 10% of service lines on its Clutch profile. Score 84, 4.9 on Clutch from 73 reviews, profit in 2025.
  • BlueSoftData engineering and BI is 20% of service lines on its Clutch profile. 1 open role with data engineering and BI in the requirements. Score 84, 4.8 on Clutch from 13 reviews, profit in 2025.
  • DevapoData engineering and BI is 35% of service lines on its Clutch profile. 1 open role with data engineering and BI in the requirements. Score 82, 4.9 on Clutch from 9 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 data engineering and BI work; the share on Clutch is what the company declares.

The top 10 at a glance

Click a column to sort.

#CompanyPeopleClutchRateFocusScore
1
Itransitionprofit 3.6M PLN (2025)foreign-owned
1000-99994.9 · 4225–49 USD/hERP and Microsoft Dynamics 36587
2
Innowiseprofit 3M PLN (2025)GoWork 65/10
1000-99994.9 · 7350–99 USD/hCustom software84
3
BlueSoftprofit 43.8M PLN (2025)GoWork 13/39
1000-99994.8 · 1350–99 USD/hCustom software84
4
Devapoprofit 182K PLN (2025)GoWork 6/10
50-2494.9 · 950–99 USD/hProcess automation82
5
DS Streamprofit 5.2M PLN (2025)
50-2495.0 · 650–99 USD/hAI77
6
Instinctoolsprofit 537K PLN (2025)foreign-owned
250-9994.7 · 3625–49 USD/hAI73
7
MITRIX Technologyprofit 746K PLN (2025)
50-2495.0 · 1650–99 USD/hAI73
8
SENLAprofit 1.7M PLN (2025)
250-9994.9 · 1925–49 USD/h72
9
WEBSENSAprofit 5K PLN (2025)
10-494.9 · 1350–99 USD/hAI72
10
Brightspaid placement
50-2495.0 · 4125–49 USD/hAI71

The ranking

The order below is the score from five axes: transparency, client reputation, stability, specialization and activity. Here specialization measures how strong the data engineering and BI 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.

Itransition

Large global IT services group with a Warsaw entity, working in ERP, CRM, Microsoft Dynamics, Salesforce and data.

Clutch: 4.9 (42 reviews)Rate: 25–49 USD/hMin. project: 25,000 USDPremier Verified

Best for: Mid-size and large companies rolling out Microsoft Dynamics, Salesforce or an ERP that want a global vendor with a Polish invoice.

Pros

  • The Polish company reported 83.4M PLN of revenue and a profit of 3.6M PLN in its 2025 filing.
  • Clutch shows 4.9 from 42 reviews and a Premier Verified badge.
  • Itransition has been a Microsoft partner since 2008. The site also lists Odoo Silver, Salesforce and AWS partnerships.
  • The job boards showed 27 open roles, 24 of them remote.

Cons

  • The Polish company belongs to Itransition Holdco Limited, and Clutch puts the group headquarters in Decatur, GA.
  • The declared rate of 25 to 49 USD is the offshore band, so ask where your team will sit.
  • GoWork shows few employee reviews, all negative (0 positive, 4 negative), and 2 of them mention layoffs.

From their website and Clutch profile

  • The homepage claims 3,000+ engineers, 800+ clients and over 25 years in business. The Polish company in KRS dates from 2017 (source).
  • The homepage names only two clients, and most case studies describe an unnamed retailer, pharma company or manufacturer (source).
  • Clutch lists 12 offices, with headquarters in Decatur, GA, and Warsaw among them. The site shows no office list we could open (source).
  • The site lists a Microsoft partnership since 2008, plus Odoo Silver, Salesforce and AWS partnerships (source).

Clients they name: The Economist, OPED Digital Health Solutions

ERP and Microsoft Dynamics 365CRM and SalesforceCustom software developmentData and BIAI and generative AIManaged IT servicesPythonJavaDockerJavaScript

Verdict. Pick Itransition for Dynamics, Salesforce or ERP rollouts at company scale. For a small custom product, the 25,000 USD minimum and the global delivery model are a poor fit.

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

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.

BlueSoft

Warsaw enterprise integrator owned by Orange Polska, focused on data, integration, cloud and AI for banks, telecom and retail.

Clutch: 4.8 (13 reviews)Rate: 50–99 USD/hMin. project: 50,000 USD

Best for: Banks, telecoms and large retailers that need integration, data platforms or managed services from a vendor with a corporate owner.

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.
  • The job boards showed 72 open roles at the last snapshot.

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).

Clients they name: Orange Polska, Canal+, Biedronka, GATX, Hellenic Cables, Raiffeisen Bank

Custom software developmentData platforms and BISystem integration (MuleSoft)Cloud migrationAI agents and document processingManaged servicesJavaPythonTerraformPostgreSQL

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.

Devapo

Warsaw process automation and integration house built around Camunda and IBM, with an Amsterdam entity.

Clutch: 4.9 (9 reviews)Rate: 50–99 USD/hMin. project: 25,000 USD

Best for: Insurers, telecoms and banks automating processes on Camunda or IBM BPM, or integrating legacy systems.

Pros

  • Devapo focuses on process automation on Camunda and IBM. It maintains an open-source Camunda connector and gives conference talks.
  • Clutch shows 4.9 from 9 reviews, and the job boards showed 14 open roles, 9 of them remote.
  • Devapo reported a profit of 182K PLN on 12.7M PLN of revenue in 2025.
  • The site lists a team of 62 by role, and an Amsterdam entity serves Dutch clients.

Cons

  • Employee reviews lean negative (6 positive, 10 negative).
  • The margin is thin, and several references are other software houses, which suggests subcontracting.
  • Most of the 13 case studies hide the client. The founding year differs, with 2016 on the site and 2018 in KRS.

From their website and Clutch profile

  • The about page gives 2016 as the founding year and lists 62 team members. KRS dates the company from 2018 (source).
  • Most of the 13 case studies do not name the client (source).
  • Several testimonials and Clutch reviewers are other software houses, such as Future Processing and SoftwareHut, which points to subcontracting (source).

Clients they name: Gränges, PKF Agility, Genesis, T-Mobile, Metronet

Process automation (Camunda, IBM BPM)AI process automationLegacy transformationData engineeringCustom developmentOutsourcing and staff augmentationKubernetesJavaPythonAzure

Verdict. Call Devapo for Camunda and BPM work. For a consumer app or a general product the niche does not help, and you should ask about the employee reviews.

DS Stream

Clutch: 5.0 (6 reviews)Rate: 50–99 USD/hMin. project: 10,000 USD

Pros

  • Profit of 5.2M PLN (2025)

Cons

  • n/a
AI

Verdict. Strongest on stability and transparency. Weakest axis: activity (1.5/5).

Instinctools

Clutch: 4.7 (36 reviews)Rate: 25–49 USD/hMin. project: 10,000 USDPremier Verified

Pros

  • Profit of 537K PLN (2025)

Cons

  • Foreign-owned
AI

Verdict. Strongest on transparency and stability. Weakest axis: activity (1.5/5).

MITRIX Technology

Clutch: 5.0 (16 reviews)Rate: 50–99 USD/hMin. project: 10,000 USD

Pros

  • Profit of 746K PLN (2025)
  • Owned by private individuals (KRS)

Cons

  • n/a
AI

Verdict. Strongest on transparency and stability. Weakest axis: activity (1.0/5).

SENLA

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

Pros

  • Profit of 1.7M PLN (2025)
  • Owned by private individuals (KRS)

Cons

  • n/a

Verdict. Strongest on transparency and stability. Weakest axis: activity (1.0/5).

WEBSENSA

Clutch: 4.9 (13 reviews)Rate: 50–99 USD/hMin. project: 25,000 USDPremier Verified

Pros

  • Profit of 5K PLN (2025)
  • Owned by private individuals (KRS)

Cons

  • n/a
AI

Verdict. Strongest on transparency and stability. Weakest axis: activity (1.5/5).

Brights

Clutch: 5.0 (41 reviews)Rate: 25–49 USD/hMin. project: 10,000 USDPremier VerifiedPaid placement on Clutch

Pros

  • Owned by private individuals (KRS)
  • 5.0 on Clutch from 41 reviews

Cons

  • Paid placement on the Clutch city list (link through ppc.clutch.co)
AI

Verdict. Strongest on transparency and client reputation. Weakest axis: activity (1.5/5).

Every company we checked

The table below has the 55 companies with data engineering and BI evidence in Warsaw, including the ones that do not qualify for the ranking, with the reason. Sort by any column.

Show all 55 companies
Size: Rate: · 55
#CompanyHQ (KRS)PeopleClutchRateRevenueProfitFocusScoreLinks
1
ItransitionERP and Microsoft Dynamics 365
Warsaw1000-99994.9 · 4225–49 USD/h83.4M PLN3.6M PLNERP and Microsoft Dynamics 36587WebsitePortfolioClutchKRS
2
InnowiseCustom software
Warsaw1000-99994.9 · 7350–99 USD/h251.2M PLN3M PLNCustom software84WebsitePortfolioClutchKRS
3
BlueSoftCustom software
Warsaw1000-99994.8 · 1350–99 USD/h300.9M PLN43.8M PLNCustom software84WebsitePortfolioClutchKRS
4
DevapoProcess automation
Warsaw50-2494.9 · 950–99 USD/h12.7M PLN182K PLNProcess automation82WebsitePortfolioClutchKRS
5
Warsaw50-2495.0 · 650–99 USD/h51.6M PLN5.2M PLNAI77ClutchKRS
6
Warsaw250-9994.7 · 3625–49 USD/h14M PLN537K PLNAI73WebsiteClutchKRS
7
Warsaw50-2495.0 · 1650–99 USD/h17.3M PLN746K PLNAI73ClutchKRS
8
Warsaw250-9994.9 · 1925–49 USD/h25.8M PLN1.7M PLN72ClutchKRS
9
Warsaw10-494.9 · 1350–99 USD/h9.3M PLN5K PLNAI72ClutchKRS
10
Warsaw50-2495.0 · 4125–49 USD/h8.3M PLNn/aAI71WebsiteClutchKRS
–
Ideamotivebody leasing
Warsaw10-495.0 · 2750–99 USD/h13.1M PLN606K PLNDocker83WebsiteClutchKRS
–
ALTEN Polskabody leasing
Warsaw1000-99995.0 · 1025–49 USD/h406.7M PLN36.2M PLNEngineering services81WebsiteClutchKRS
–
ITDSbody leasing
Warsaw250-9994.9 · 11n/a141M PLN12.7M PLNJava78ClutchKRS
–
Commoditechbody leasing
Warsaw50-2495.0 · 1225–49 USD/h10.7M PLN1.2M PLNBody leasing76WebsitePortfolioClutchKRS
–
Kyotu Technologytoo little client evidence
Warsaw10-495.0 · 450–99 USD/h11.4M PLN942K PLNPython76ClutchKRS
–
B3 Consulting Polandbody leasing
Warsaw50-2494.9 · 625–49 USD/h55.7M PLN6.2M PLNIT consultants extending client teams74PortfolioClutchKRS
–
Acaisofttoo little client evidence
Warsaw250-9995.0 · 650–99 USD/h34.1M PLN4M PLN71ClutchKRS
–
Qodecatoo little client evidence
Warsaw50-2495.0 · 950–99 USD/h22.5M PLN486K PLN70WebsiteClutchKRS
–
Appsilontoo little client evidence
Warsaw50-2495.0 · 33100–149 USD/hn/a9.9M PLN69WebsiteClutchKRS
–
Sigma Software Grouptoo little client evidence
n/a1000-99994.8 · 3750–99 USD/h28M PLN909K PLNPython69ClutchKRS
–
Stellanstoo little client evidence
Warsaw10-494.9 · 6n/a3.7M PLN700K PLNAI69ClutchKRS
–
ITSG Globaltoo little client evidence
Warsaw50-2494.8 · 6n/a17.5M PLN799K PLN68ClutchKRS
–
Directiotoo little client evidence
Warsaw50-2494.8 · 650–99 USD/h29.1M PLN-437K PLN66WebsiteClutchKRS
–
Stepwisetoo little client evidence
Warsaw10-494.9 · 2950–99 USD/h800K PLN-355K PLNAI64ClutchKRS
–
GS Servicesbody leasing
Warsaw50-249no Clutch profile25–49 USD/h9.2M PLN6K PLNPython63ClutchKRS
–
TantusDatatoo little client evidence
Warsaw10-494.9 · 1050–99 USD/h3.5M PLN-82K PLNAI60ClutchKRS
–
Code Inspirationtoo little client evidence
Warsaw10-494.9 · 2025–49 USD/h9K PLN-199K PLN59WebsiteClutchKRS
–
Nexio Managementtoo little client evidence
n/a250-999no Clutch profile50–99 USD/hn/an/aPython49WebsiteClutchKRS
–
Addepto (Part of KMS Technology)too little client evidence
n/a50-2494.9 · 1950–99 USD/hn/an/aAI47Clutch
–
The Codesttoo little client evidence
n/a50-2494.8 · 2750–99 USD/hn/an/aPython46Clutch
–
Onwelotoo little client evidence
n/a250-9994.8 · 350–99 USD/hn/an/aPython44Clutch
–
Webelliantoo little client evidence
n/a50-2494.8 · 325–49 USD/hn/an/aPython44Clutch
–
GetInData now Xebiatoo little client evidence
n/a50-2495.0 · 13n/an/an/aAI43Clutch
–
Lightpoint Globaltoo little client evidence
n/a50-2495.0 · 1325–49 USD/hn/an/a43Clutch
–
Reenbittoo little client evidence
n/a50-2495.0 · 2325–49 USD/hn/an/aAI43Clutch
–
eConsultingtoo little client evidence
n/a50-2495.0 · 6n/an/an/aAzure42Clutch
–
Fabritytoo little client evidence
n/a250-9994.7 · 1125–49 USD/hn/an/aAI42Clutch
–
PixelPlextoo little client evidence
n/a50-2494.9 · 3350–99 USD/hn/an/aAI42Clutch
–
Pretiustoo little client evidence
n/a50-2494.8 · 850–99 USD/hn/an/aPython42ClutchKRS
–
SoftwareMilltoo little client evidence
n/a50-2494.9 · 3050–99 USD/hn/an/aAI42Clutch
–
Transition Technologies MStoo little client evidence
n/a250-9995.0 · 150–99 USD/hn/an/aPython42ClutchKRS
–
Billenniumtoo little client evidence
n/a1000-99995.0 · 1n/an/an/aJava41ClutchKRS
–
apreelbody leasing
n/a250-9994.8 · 325–49 USD/hn/an/aJava40ClutchKRS
–
CodiLimetoo little client evidence
n/a250-9994.8 · 250–99 USD/hn/an/aPython40ClutchKRS
–
ITRextoo little client evidence
n/a250-9994.9 · 1750–99 USD/hn/an/aAI40Clutch
–
Pragmiletoo little client evidence
n/a50-2494.9 · 425–49 USD/hn/an/aAI40Clutch
–
Symfatoo little client evidence
n/a50-2494.9 · 1850–99 USD/hn/an/aAI40Clutch
–
Chaos Gearstoo little client evidence
n/a10-495.0 · 150–99 USD/hn/an/aAWS39Clutch
–
CROSStoo little client evidence
Opole50-2495.0 · 250–99 USD/hn/an/aAI39Clutch
–
10 Sensesunder 10 people
n/a2-95.0 · 350–99 USD/hn/an/aAI38Clutch
–
PinoByteunder 10 people
n/a2-95.0 · 225–49 USD/hn/an/aAI37Clutch
–
Lingarotoo little client evidence
n/a1000-99994.8 · 4n/an/an/aAI36Clutch
–
QED Softwaretoo little client evidence
n/a10-495.0 · 2100–149 USD/hn/an/aAI36Clutch
–
Processifiertoo little client evidence
n/a10-495.0 · 150–99 USD/hn/an/aAI34Clutch
–
Veturaitoo little client evidence
n/a10-495.0 · 1100–149 USD/hn/an/aAI34Clutch

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.

  • Brights (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.

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.

  • Ideamotive
  • ALTEN Polska
  • ITDS
  • Commoditech
  • B3 Consulting Poland
  • GS Services
  • apreel

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.

  • Acaisoft
  • Qodeca
  • Appsilon
  • Sigma Software Group
  • Stellans
  • ITSG Global
  • Directio
  • Stepwise
  • TantusData
  • Code Inspiration
  • Addepto (Part of KMS Technology)
  • GetInData now Xebia
  • and 7 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.

  • Kyotu Technology
  • Nexio Management
  • The Codest
  • Onwelo
  • Webellian
  • eConsulting
  • Pretius
  • Transition Technologies MS
  • Billennium
  • CodiLime
  • Pragmile
  • Chaos Gears
  • and 7 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/h1650-99 USD/h29100-149 USD/h3150-199 USD/h0
Rates declared on Clutch, 48 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 the data model and the pipeline tests, not the dashboards. Dashboards are cheap; trustworthy numbers come from the plumbing behind them.
  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.

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Questions

What are the best data engineering and BI software houses in Warsaw in 2027?

By the score on this page: 1. Itransition (87), 2. Innowise (84), 3. BlueSoft (84), 4. Devapo (82), 5. DS Stream (77). 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 data engineering and BI 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 data engineering and BI?

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
  • 709checked in the National Court Register
  • 454with 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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Best software houses in Warsaw10 agencies ranked by registers, filings and reviews, out of 489 checked.Best data engineering and BI companies in Poland10 companies ranked out of 104 with data engineering and BI evidence in Poland.Best React software houses in Warsaw10 companies ranked out of 168 with React evidence in Warsaw.Best Next.js software houses in Warsaw10 companies ranked out of 49 with Next.js evidence in Warsaw.Best Node.js software houses in Warsaw10 companies ranked out of 136 with Node.js evidence in Warsaw.Best TypeScript software houses in Warsaw10 companies ranked out of 83 with TypeScript evidence in Warsaw.Best Angular software houses in Warsaw10 companies ranked out of 101 with Angular evidence in Warsaw.Best Vue.js software houses in Warsaw10 companies ranked out of 59 with Vue.js evidence in Warsaw.Best Kotlin software houses in Warsaw10 companies ranked out of 55 with Kotlin evidence in Warsaw.Best .NET software houses in Warsaw10 companies ranked out of 97 with .NET evidence in Warsaw.Best PHP and Laravel software houses in Warsaw10 companies ranked out of 96 with PHP and Laravel evidence in Warsaw.Best Ruby on Rails software houses in Warsaw10 companies ranked out of 43 with Ruby on Rails evidence in Warsaw.
Przemysław Zalewski

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Przemysław Zalewski · 15+ years shipping software

“a true bias for action” client CTO, public LinkedIn recommendation

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