About Callstack
Callstack is a Technology company based in Wrocław (Poland) founded in 2016 by Anna Lankauf, and was acquired by Viking Global Investors in July 2025. Transformative software applications are developed by the engineering consultancy. Its chief executive, as recorded, is Krzysztof Lis. Its website callstack.com draws about 241 thousand monthly visits. Callstack offers products and services including Product Development, Tech Stack Upgrade, and Team Upskilling. Its focus areas include Business Services, IT Services and Suite. Its legal entity is Callstack.io Sp. z o.o.
Company details
Callstack was founded in 2016 and is headquartered in Wroclaw, Poland. Software engineering consultancy services are provided, with specialization in microfrontends, React Native, and observability. Applications are built and optimized for clients, alongside expertise in product development, growth strategies, and performance enhancements. Operations focus on delivering tailored software solutions across various organizational needs.
- Headquarters Wrocław, Poland
- Founders Anna Lankauf
- Stage Acquired
- SectorsTechnology
- Email••••••••
- Phone•••• ••••
- Website callstack.com
- Social LinkedIn X Facebook YouTube
- Acquired by Viking Global Investors (Jul 2025)
- Legal Name Callstack.Io Sp. Z O.O.
- Investors
- Acquired byViking Global Investors
(Jul 2025)
Products & Services of Callstack
Callstack offers a comprehensive portfolio of products and services, including Product Development, Tech Stack Upgrade, and Team Upskilling.
Assists in creating innovative software products
Upgrades technologies for improved performance and scalability
Equips developers with knowledge in modern tools and practices
Apps and channels of Callstack
its YouTube channel Callstack has 18.3K subscribers and 30 videos.
Videos from Callstack
The most watched videos on Callstack's YouTube channel, Callstack (18.3K subscribers). Click a video to play it here.
More on Callstack.
Investors in Callstack
Callstack has secured backing from 1 investor, including venture fund investors. Prominent investors backing the company include Viking Global Investors.
| Investor | Description | Founded Year | Domain | Location |
|---|---|---|---|---|
Private investment firm focused on multiple sectors | vikingglobal.com | Greenwich, United States |
Investor details for Callstack
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- Complete investor list
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People of Callstack
42 people are tracked at Callstack (8 in leadership, 1 in board & advisors, 33 in team).
| Name | Role | Group |
|---|---|---|
Anna Lankauf | Co-Founder | Leadership |
Krzysztof Lis | CEO | Leadership |
Kris Lis | CEO & Board Member | Leadership |
Agnieszka Czmochowska | CFO | Leadership |
Michał Marlinga | Head of Operations | Leadership |
Radek Chrzempka | Head of People & Culture Team | Leadership |
Michał Pierzchała | Head of Technology | Leadership |
Michał Chudziak | Director of Engineering | Leadership |
Mike Grabowski | Co-Founder & Supervisory Board Member | Board & advisors |
Maciej Jastrzębski | Innovation Lead in Technology | Team |
MacIej Kabata | Sales Operation Manager | Team |
Weronika Szałwińska | Junior IT Sourcer | Team |
Piotr Drapich | Expert Software Engineer | Team |
Robert Pasiński | Senior Software Developer | Team |
Tomasz Misiukiewicz | Software Engineer | Team |
Wiktor Szlegier | Software Engineer | Team |
Thiago Brezinski | Software Engineer | Team |
Jakub Romańczyk | Software Engineer | Team |
Eduardo Graciano | Software Engineer | Team |
Przemysław Gawron | Software Engineer | Team |
22 more people are available in the full profile.
Complete people profiles for Callstack
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Timeline of Callstack
2 dated milestones of Callstack across 9 years, from founding to its latest funding, stage changes and deals.
- Founded Callstack is founded.
- Exit Acquired by Viking Global Investors.
Web traffic of Callstack
The website of Callstack (callstack.com) receives about 240.7K visits a month.
- Monthly visits240.7K
▲ 14.3% vs previous month
Websites whose visitors overlap most with Callstack. Affinity shows how closely the audiences match.
| Website | Domain | Audience affinity | Monthly visits | Global rank | Profile |
|---|---|---|---|---|---|
togo-pac.com | togo-pac.com | 100% | #9,153,985 | – | |
missionpinball.org | missionpinball.org | 93% | #4,340,061 | – | |
| npmjs.com | 92% | 6.6M | #9,643 | View details | |
| sentry.io | 92% | 2.8M | #17,019 | View details | |
amanhimself.dev | amanhimself.dev | 91% | #969,727 | – | |
| •••••••••• | ••••••.com | ••% | •.•M | #••••• | – |
| •••••••••• | ••••••.com | ••% | •.•M | #••••• | – |
| •••••••••• | ••••••.com | ••% | •.•M | #••••• | – |
All 40 similar websites and full traffic analytics for Callstack
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Related news about Callstack
Complete news archive for Callstack
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Frequently Asked Questions about Callstack
Callstack was founded in 2016.
Callstack is headquartered in Wrocław, Poland. It is registered at Wrocław, Lower Silesian Voivodeship, Poland.
Krzysztof Lis is the CEO of Callstack, as recorded in our data.
Callstack was founded in 2016 and is headquartered in Wroclaw, Poland. Software engineering consultancy services are provided, with specialization in microfrontends, React Native, and observability. Applications are built and optimized for clients, alongside expertise in product development, growth strategies, and performance enhancements. Operations focus on delivering tailored software solutions across various organizational needs.
Callstack offers Product Development, Tech Stack Upgrade, and Team Upskilling.
Callstack has 1 investor. Key investors include Viking Global Investors.
Callstack operates through Callstack.Io Sp. Z O.O..
Yes. Callstack was acquired by Viking Global Investors in July 2025.
The website of Callstack receives about 241 thousand visits a month.