ReaktorX
deco

From idea to
first funding.

Investing in exceptional U25 first-time founders
from CEE and flying them to Silicon Valley.

Applications opening in
02days
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Made real by SMOK Ventures Creative Motion
$50K
Cash Investment
1 Month
In San Francisco
6
Week Program
15
Teams Per Batch

ReaktorX Batch #12 Demo Day

Batch #11 Demo Day

Everything you need
to go global.

$50K
Cash via SAFE
5% equity. No debt, no repayment.
1 Month
In San Francisco
Live and work from The European Startup Embassy. Meetings with investors, founders, and operators in Silicon Valley.
Apply Now
1:1
Lead Mentor
Matched by skills & personality. On-demand experts included.
$75K+
Tool Credits
AWS, GCloud, Stripe, Notion, Mixpanel & 15+ more — day one access.

From first meeting
to San Francisco.

01
Mar–May · Ongoing
Brainstorming Events
Meet the team IRL.
Events across CEE.
02
Until May 30th
Apply Online
Takes 20 minutes.
Deadline is firm.
03
June
Selection
Top 40 interviewed.
15 accepted by end of June.
04
July · 2 Weeks
2 Weeks in EU
Kickoff in one CEE city.
Build, align, meet your cohort.
05
August · Full Month
1 Month in SF
The European Startup Embassy.
Investors, founders, operators.

Teams We've Backed.

A few startups from recent ReaktorX batches, now building and scaling globally.

E-commerce · 3D
3DAPI

Sell globally and made locally. Bringing product personalisation and 3D commerce to every store.

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Gaming · Dev Tools
Haip

Playtest like Valve — without Valve's budget or headcount. AI-powered game playtesting at scale.

Learn more
AI · Enterprise
DIMA AI

Deploy and manage AI tools securely across your entire organization with unified workspaces.

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QA · AI
Triberry

AI-powered user flows map to ship top-quality releases faster by imitating real users' behavior.

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Sales · AI
SalesPad

Every offline campaign is measurable. Connecting physical advertising to digital attribution.

Learn more
Logistics · SaaS
EXPI

Inventory management for distributors and retailers, keeping them informed with live updates on order status.

Learn more
Exited
Health · Speech
The Linghos

Speech therapy reinvented. Making professional speech support accessible, engaging, and effective.

Learn more
AI · Conversational
Grais

Agentic AI in any conversation through a zero-integration overlay — no backend changes required.

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Health · AI
Vivid Mind

Voice reveals the invisible. AI-powered voice biomarkers for early mental health detection.

Learn more

What founders say
about ReaktorX.

I seriously doubt hiPets would even have taken off if it wasn't for ReaktorX. I won't list everyone who talked to me during my ReaktorX because I'm sure I'll forget someone, so I'll say collectively that Reaktor, thank you for bringing the best people who gave their time and shared their know how and experience with me.

Dorota
Dorota Rymaszewska
CEO @ hiPets
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Great organization, connection with mentors who were supportive at every step, ad hoc consultations with the best, intensive pitching sessions — all this resulted in a completely different approach and a look at our business. Thanks to the support of the entire ReaktorX team, we managed to redefine our goals and consistently implement them.

Nikoletta
Nikoletta Mańkowska
CEO @ ViralTalk

ReaktorX's mentorship was crucial in refining our business model and strategy — emphasizing assumption validation before development and facilitating connections that led to beneficial partnerships and funding opportunities.

Marta
Marta Szymanowska
CEO @ Nethica
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How did ReaktorX help? By a very individual approach to our business case, but also creating great structure shared with other startups.

Jan
Jan Bartnik
Co-founder @ HAIP

I'm a seasoned entrepreneur with lots of love for the Youth Travel industry. Despite being in the business for over 14 years, ReaktorX gave me a lot on shaping a start-up vs. a regular business. We expect to have booming growth in the post-COVID times.

Szymon
Szymon Panfil
CEO @ Strivio
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ReaktorX helped me build my routine. I met my first business mentor in ReaktorX — Uldis Leiterts. Uldis is a serial entrepreneur with a history of successes but also failures — thanks to that we quickly hit it off. The knowledge, pieces of advice, and motivation that he shared with me have been bearing fruit up until today.

Eva
Eva Galant
CEO @ Hashiona

The ReactorX team just gets it. The program gave us exactly what we needed: honest feedback on early-stage development of our product, industry insights from successful founders, and network connections that actually matter. The best part? Months after demo day, they're still in our corner.

Mateusz
Mateusz Oziębłowski
Co-founder @ BuyerMind
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ReaktorX infused us with hands-on knowledge in an exceptionally supportive environment.

Mariusz
Mariusz Pitura
Co-founder @ The Linghos

Based on the work done within the program, we were able to make an important product pivot, increasing the value of our product. Our special thanks to ReaktorX for the mentor who shared his extensive experience and helped us to form a go-to-market strategy.

Eugene
Eugene Zhebko
Co-founder @ Pipeliner.Online

The program opened my eyes to many relevant aspects of running a startup, though the most significant benefit of taking part in it was the network. I met fantastic people, including like-minded founders, mentors, and investors, many of whom I am still in touch with.

Kacper
Kacper Zambrzycki
Head of Operations @ AhoyConnect

The program helped a lot along the way from advice (even harsh advice) to commitment, contacts, deep understanding and learning all the steps required to build and manage the "next big thing". People from ReaktorX and SMOK rock in so many ways even after the program ended.

Paul
Paul Muntean
CEO @ DIMA
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Starting Renderro was one of the biggest changes of my life. There were problems that my previous experience couldn't provide me with solutions. How to transform your idea into a solution that helps people? How to make a product out of it? ReaktorX was the best place to find those answers.

Piotr
Piotr Chomczyk
Founder @ Renderro

When I joined ReaktorX in 2020 I had a lot of doubts and mixed feelings, especially when people I talked about it assumed that I would be a mentor and not participate in the program myself. 😅 In my opinion, ReaktorX is the best accelerator in CEE.

Paulina
Paulina Wardęga
CEO @ Heroify
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Quite surprisingly, the no. 1 value that I drew from ReaktorX were not the workshops. Sure, they were amazing and very well suited to what we needed. But it's almost nothing compared to the incredible network I got access to thanks to ReaktorX.

Tomek
Tomek Wiszniewski
Lofty

The ReaktorX team just gets it. The program gave us exactly what we needed: honest feedback on early-stage development of our product, industry insights from successful founders, and network connections that actually matter. Months after demo day, they're still in our corner, supporting BuyerMind's growth.

Sebastian
Sebastian Sulma
Co-founder @ BuyerMind
Program Mentors

Meet the mentors
inside the program.

Every accepted team gets matched with a lead mentor from our network. Operators, founders, and investors who've built globally and work hands-on with you throughout the program.

Program partners

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$75,000+ in credits
from the tools
that matter.

Every accepted team gets immediate access to credits and perks from our partner ecosystem — the same stack used by the world's fastest-growing startups, now in your hands from day one.

Infrastructure SaaS Tools Finance & Legal
75% off year 1, 50% year 2, 25% year 3
$10,000 in AWS credits
6 months of Zendesk Suite for free
$15,000 credits for online payments
300 Visa virtual cards for free
Extended 30-day trial + 20% off for 12 months
Up to $100,000 in Google Cloud credits
$6K free — 6 months + unlimited AI
1h professional & tax consultancy for free
$10,000 in Beefree SDK credits
20% off + 3-month free trial on global hiring
Up to 80% off on SEO solution
First year of Mixpanel free (up to $50,000)
30 days free on Hotjar
$1,000 free Retool credits
Startup Basic Plan FREE or 90% off Plus Plan
$250 off Loom Business tier
25,000 free email credits
25% off Slack Business+
$10,000 in Lovable credits
75% off year 1, 50% year 2, 25% year 3
$10,000 in AWS credits
6 months of Zendesk Suite for free
$15,000 credits for online payments
300 Visa virtual cards for free
Extended 30-day trial + 20% off for 12 months
Up to $100,000 in Google Cloud credits
$6K free — 6 months + unlimited AI
1h professional & tax consultancy for free
$10,000 in Beefree SDK credits
20% off + 3-month free trial on global hiring
Up to 80% off on SEO solution
First year of Mixpanel free (up to $50,000)
30 days free on Hotjar
$1,000 free Retool credits
Startup Basic Plan FREE or 90% off Plus Plan
$250 off Loom Business tier
25,000 free email credits
25% off Slack Business+
$10,000 in Lovable credits
Eligibility

Is ReaktorX
right for you?

You're a fit if…
You're under 25 and a first-time founder
You're based in CEE — Poland, Romania, Baltics, Czech Republic, Hungary, Ukraine, and neighboring countries
You have a technical background or a strong technical co-founder
You're building something with genuine global ambition
You can commit fully — including one month in San Francisco
You want a hands-on team, not a lecture series
Probably not if…
You're a repeat founder or already have significant VC backing
You're building a local or lifestyle business with no plans to scale
You're not willing to give equity or have a co-founder who isn't on board
You can't commit to the full program timeline
You're looking for a grant, not a co-investor
You want a stamp on your CV more than you want to build a company

Your questions,
answered.

ReaktorX is the top accelerator for first-time founders from Central and Eastern Europe. We find the sharpest young builders in the region — Olympiad winners, self-taught hackers, obsessive tinkerers — and bring them to Silicon Valley before anyone else does. We invest in them, fly them to San Francisco, and plug them directly into the US startup ecosystem.
You're under 25, from Central or Eastern Europe, and you've been winning math, IT, or physics olympiads, shipping side projects, or obsessing over hard problems for years. You tinker with hardware, hack together prototypes, and outwork everyone around you. You've never founded a startup before — but you know you're going to. ReaktorX is your launchpad.
No. We invest in people, not pitch decks. Some founders join with a clear idea, others come in pre-idea and figure it out during the program. What matters is your track record of building, competing, and solving hard problems — not whether you have a slide deck ready.
A $50K investment ticket, a one-month residency in San Francisco at the European Startup Embassy (coworking + coliving), access to events and mentorship in the heart of the SF startup ecosystem, inclusion in ESE's deal flow report sent to 100+ US and EU investors, and a network of CEE founders and operators who've been through the same journey.
We invest $50K via a SAFE (Simple Agreement for Future Equity) for approximately 5% equity. There are no board seats, no complicated terms — it's designed to be founder-friendly and fast. This is a discovery ticket: we're betting on you early, before anyone else will, and giving you the capital to get started.
There are three phases. Selection runs from March through June — applications are open while we scout in-person across 15+ CEE countries. In mid-July, there's a two-week kickoff in a CEE country to prepare for the US. Then the entire month of August is spent in San Francisco, living and working from the European Startup Embassy.
ESE is a coworking and coliving hub in the heart of San Francisco at 461 Bryant Street, right next to major VCs like Menlo Ventures, A16Z, Reach Capital, Index Ventures, and South Park Commons. ReaktorX is a founding partner. During the program, you'll live in the coliving house in Japantown, work from the office, and be surrounded by other European founders building in the US.
Very. We receive 500+ applications per batch and select only 15 teams. We're looking for exceptional people with proof of excellence — olympiad medals, shipped projects, hackathon wins, or anything that shows you're in the top fraction of builders in your country.
Both. Applications are open online, but we also don't wait around — our team personally tours 15+ CEE countries every year, hosting meetup sessions at universities, hacker houses, and with local ecosystem partners. If you're active in olympiad, hackathon, or builder communities in the region, there's a good chance we'll cross paths.
You work on your startup full-time from the European Startup Embassy office. You attend curated events, meet investors, get mentored by operators who've scaled companies in the US, and connect with the broader SF founder community. Your startup also gets listed in the ESE deal flow report that goes out to 100+ investors. The goal is to compress years of network-building and market exposure into one intense month.
Housing is covered — both during the two-week kickoff in Europe and during the month in San Francisco at the ESE coliving space in Japantown. Flights are not covered, but the $50K investment is yours to allocate, and many founders use part of it to cover travel and living expenses during the program.
We help you navigate the visa process. Most participants travel on a B-1 business visitor visa, which covers attending meetings, events, and working on your own startup. Our team has experience coordinating this across multiple CEE countries and will guide you through it.
No. The SF residency is one month. After the program, many founders return to Europe to build while maintaining the US connections and market access they gained. Some eventually move to the US, but it's not a requirement.
You leave with capital, US market exposure, investor relationships, and a network of fellow CEE founders. ReaktorX continues to support you post-program — we help with follow-on fundraising introductions, remain available as advisors, and keep you connected to the alumni community. Top performers from any batch are also eligible for follow-on investment from ReaktorX.
During the program, you're embedded in the European Startup Embassy ecosystem alongside founders from across Europe. You get access to curated mentorship from operators, investors, and founders who've built and scaled companies in the US market. After the program, you stay connected through the ReaktorX alumni network — a growing community of CEE builders who understand your background and your ambition.
We scout across 17 countries in Central and Eastern Europe, including Poland, Romania, Czech Republic, Hungary, Bulgaria, Estonia, Lithuania, Latvia, Croatia, Serbia, Ukraine, and others. Our network of ecosystem partners spans the entire region, including ultra-local communities that global VCs have zero access to.
Our portfolio spans AI, developer tools, health tech, gaming, and commerce. Alumni include 3DAPI (3D commerce and product personalization), HAIP (AI-powered game playtesting), Dima AI (enterprise AI deployment), Grais (agentic AI overlays), Triberry (AI user flow testing), Sales Pad (offline-to-digital ad attribution), EXPI (inventory management), Vivid Mind (voice biomarkers for mental health), and The Linghos (speech therapy — exited).
Luca Stirbat — Forbes 30 Under 30 Romania, TEDx speaker, ex-IT and Robotics Olympiad winner, and founder of a startup studio with 8 startups built and 120+ concepts tested. He's organized 30+ hackathons, accelerators, and incubators across the region over the past 10+ years, and leads community and operations at the European Startup Embassy in San Francisco. He's been in your shoes — and he built the program he wished existed.
Yes. If you're asking this question, you're probably exactly the kind of person we're looking for. The founders we back often underestimate themselves — they're missing access, not skill. That's the whole point of ReaktorX. Apply, and let us decide.

Your startup.
Global from day one.

$50K to build. $75K+ in tools. A month in SF to grow.
15 spots per batch.

Apply Now