Business angel · Venture capital · Angel syndicates
Capital from someone who has built and fixed companies.
I back early-stage founders as a business angel, through venture funds in Europe and together with angel syndicates. Tickets from €25k to €150k, and hands-on help with product, technology and the next round.
Three ways in
One investor, three routes to your round
Early rounds are rarely filled by a single cheque. Depending on what your round needs, I can come in alone, bring other angels, or work through a fund.
Business angel
My own capital, my own decision. Suited to pre-seed and seed rounds where speed and a hands-on partner matter more than a big name on the cap table.
Venture capital
I invest as a partner in venture funds across Europe. When a company fits a fund's thesis, the conversation can continue there, with larger follow-on capacity.
Angel syndicates
I co-invest with groups of experienced angels. One conversation can bring several investors into the round, with one person coordinating the process.
Ticket size
€25k to €150k
Per company, from my own capital. Larger amounts are possible together with syndicates or funds.
How it works
From your deck to a partnership
A short, predictable process. You always know what happens next, and a no comes with the reasons.
Six steps, one person accountable for the answer
- You send a short deck and a few lines about the round, through the form below or by email. No warm introduction needed.
- I read every submission myself and check the fit: sector, stage, team and whether I can genuinely help. If it is not a fit, you hear that early.
- A call with the founders about the problem, the product and the people. I care more about how you think than about polished slides.
- A focused look at the product and the technology: architecture, data, delivery risk and what it will take to scale. This is where my background matters most.
- A clear decision with the ticket, between €25k and €150k, and the route: on my own, with an angel syndicate, or alongside a fund.
- After the money: board or advisory work, product and technology reviews, interim leadership when needed, and introductions for the next round.
What I look for
Sectors I invest in
Technical founders with a real problem to solve, and markets where engineering depth is an advantage rather than a cost.
Healthcare
Healthtech, care delivery and medical data, where trust, privacy and reliability are part of the product.
Telemetry and big data
IoT, time series and data platforms that turn large streams of signals into decisions.
AI and machine learning
Applied AI with a defensible data loop: evaluation, reliability and unit economics, not just a model call.
Developer tools
Products built for engineers, where I can judge the product as a user.
B2B and vertical SaaS
Software that runs a business process end to end, with a clear path to retention.
Fintech, edtech and marketplaces
Where the portfolio has its strongest exits so far.
Beyond the cheque
What founders get
Technical due diligence, from the inside
An architect's view of your product: what will break at scale, what to fix first, and how to explain it to the next investors.
Interim leadership
When the company needs it, I can step in as acting CTO or support the CEO through a critical phase.
Board experience
Supervisory and management board work: governance that helps the company move instead of slowing it down.
Exit experience
Companies I backed have been acquired by Wirtualna Polska, PKO Bank Polski, WP Engine, TransPerfect and others.
Portfolio
Companies I have backed
Investments made through Hedgehog Fund and Experior Venture Fund, ordered from the strongest outcomes. Further investments are confidential and not listed here.
Exits
17 of 27Stakes sold, companies acquired, merged or listed. Returns appear only where publicly reported.
Software for hair and beauty salons. Combined with Booksy in December 2020, continuing exposure through the merged company.
Global marketplace for online language tutoring. The stake was sold in 2022 at 14x cash-on-cash, as reported by the fund's partner.
Marketplace for private medical services, formerly Tourmedica.
Taxi ordering platform for consumers and businesses.
Fashion offer aggregator. Domodi, part of the Wirtualna Polska group, bought 100% in 2015; Forbes described the return as roughly 6x.
Card-linked loyalty platform. PKO Bank Polski, Poland's largest bank, acquired 100% of the shares in January 2017.
Management platform for translation businesses. The fund's stake was bought out in 2020; XTRF was later acquired by K1 in a separate deal.
Automated website updates (AutoUpdater). WP Engine acquired the technology and the engineering team in 2019.
Crowdsourced data collection and annotation for AI. TransPerfect acquired it in 2021 to expand its DataForce AI data business.
Mobile loyalty programmes for restaurants. POSbistro, another portfolio company, bought 100% of the shares in 2017.
Online marketplace for used cars. The fund's shares were sold by 2019; terms were not disclosed.
Educational dolls and toys for girls, built to travel internationally. The investment was exited by 2018.
Event registration and ticketing platform.
Marketplace for food from local farmers. The fund exited in 2022, when a media group took control of the company.
Study materials and services for students and employers. The fund exited in 2016.
Mobile and browser games studio. Both funds exited, in 2020 and 2024.
Bluetooth mesh lighting control, listed on the main market of the Warsaw Stock Exchange in July 2018.
Still building
6 of 27No exit yet. Later rounds and valuations are not shown as returns.
Made-to-measure furniture designed online; co-investors included Paua Ventures and Gruner + Jahr.
AI that connects offline shopping behaviour with online marketing.
EnsoVisual and textual programming for data workflows, formerly Luna.
Debugging and observability tooling for code running in production.
Automated predictive modelling and data analytics.
Point-of-sale and management system for restaurants; among its first investors.
Closed
4 of 27Part of early-stage investing. Each one taught something about timing, markets or execution.
Status as found in public sources (company announcements, court registers, press) as of November 2026. A missing exit does not mean the fund still holds shares; registry changes and mergers are shown as such, not as profitable exits. Amounts and multiples appear only where publicly reported.
Get in touch
Send your pitch
A short deck is enough to start: the problem, the product, the team, traction so far and what the round is for. Attach files or share links (DocSend, Google Drive, Notion, a demo video).
Prefer email? Write to marcin@devinside.cloud.
Questions founders ask
What ticket size do you invest?
From €25k to €150k per company from my own capital. Together with angel syndicates or funds the round can be larger.
Which stages?
Early stage: mostly pre-seed and seed, where a hands-on investor with product and technology experience can make the biggest difference.
Do you only invest in technology companies?
Almost always. The strongest fit is a company where engineering, data or AI is central to the product: healthcare, telemetry and large-scale data, AI and machine learning, developer tools and B2B software.
Can you bring other investors?
Yes. I co-invest with angel syndicates and work with venture funds in Europe, so one conversation can reach more than one investor when the company fits.
What happens to the files I send?
They are read only to evaluate the investment and are not shared outside that purpose without your permission. See the privacy notice.