The entire startup ecosystem, in one place
Network, dataroom, startup profiles and fundraising. Founders, investors and mentors, together.
The startup ecosystem onefive is built for
What raising in Europe actually looks like
European tech companies raised around $44B in 2025, a 7% rise on 2024 and still well below the 2021 peak, according to Atomico's State of European Tech. Money is available, but it is concentrated: fewer rounds, larger cheques, and a longer wait between them.
PitchBook put the median European seed deal at €2.2M in the first quarter of 2025, on a median valuation of €5.6M. Dealroom's European funnel shows roughly 24% of seed companies going on to raise a Series A. Raising a seed already puts a company in a minority; it does not make the next round a formality.
Speed matters more than founders expect. DocSend's 2024 research found that most successful seed and pre-seed companies closed in twelve weeks or less, and measured the average investor visit to a seed deck at 3 minutes 44 seconds. A process that stalls while documents are assembled is a process that loses its window.
The reasons companies fail are better documented than most advice suggests. CB Insights analysed 431 shutdowns and found poor product-market fit behind 43% of them. Running out of capital appears in 70% of cases, but the firm is explicit that this is the final symptom rather than the cause.
European tech investment in 2025 (Atomico)
Median European seed deal, Q1 2025 (PitchBook)
Seed companies reaching Series A (Dealroom)
Average investor visit to a seed deck (DocSend)
How Onefive works
Four steps, in the order a real raise happens. Everything described here is live today; investor updates and a pipeline CRM are on the roadmap and are not part of the product yet.
1. Build a startup profile
Team, market, traction, and the round you are raising, in the order an investor scans them. The profile is public; your documents are not.
2. Organise the dataroom
Files sit in private storage and are served through links that expire in under a minute. Permissions are set per group and per category, so legal, financial, and product folders stay separate.
3. Meet the right investors
Matching runs on sector, stage, and geography, against verified profiles rather than a purchased contact list. A warm path to a fund that already backs companies like yours beats a cold list every time.
4. See who is actually reading
Every file records its own views, and view-only PDFs carry a watermark with the reader's name, email, and timestamp. You know who to follow up, and you can revoke access the moment a conversation ends.
Who Onefive is for
Four roles, one workspace, each with what its own work requires.
- Founders
- Raising pre-seed to Series A, replacing a spreadsheet, a file-sharing link, and a personal inbox with one place.
- Investors
- Angels and funds sourcing qualified deal flow, filtering by stage, sector, and geography before requesting access.
- Mentors and advisors
- Supporting portfolio companies with visibility on where each raise stands.
- Accelerators
- Running whole cohorts, each company in its own isolated workspace, with a portfolio-level view for programme managers.
Go deeper
Frequently asked questions
What is Onefive?+
Onefive is a platform that connects entrepreneurs, investors and experts. It brings three things founders usually spread across separate tools into one workspace: a fundraising dataroom with per-group permissions, a verified startup profile investors can review, and a network of investors and mentors matched by sector and stage. It was founded in 2025 and ships in English and French.
Who is Onefive for?+
Four groups. Founders raising pre-seed to Series A rounds, who want to replace a spreadsheet, a file-sharing link and a personal inbox with one place. Angel investors and funds sourcing qualified deal flow. Mentors and advisors supporting portfolio companies. And accelerators running whole cohorts, each company in its own isolated workspace.
What is the Onefive dataroom?+
A secure space to share your startup's documents with investors during a fundraise. Files are held in private storage, never behind a public URL, and served through signed links that expire in under a minute. Permissions are set per group and per category, so legal, financial and product folders stay separate, and access can be revoked at any time.
How do I get access to Onefive?+
Onefive is in pre-launch, so access runs through a waitlist. Join it from the homepage and we will notify you as soon as your workspace opens. The product is free during pre-launch, with 1 GB of storage per dataroom and a 50 MB limit per file.
Where is Onefive based?+
Onefive was founded in 2025 and is based in Paris, France. The product is available in English and French, and documents are handled in line with the GDPR. The ambition is global; Europe is simply the first market, which is why the interface and the investor filters are built around European stages.
What are the main startup funding stages?+
Startup funding typically moves from pre-seed through seed, Series A, B and C, then growth rounds and eventually an IPO or acquisition. PitchBook put the median European seed deal at €2.2M in Q1 2025, on a median valuation of €5.6M. Dealroom's European funnel shows roughly 24% of seed companies going on to raise a Series A. Our funding-stages guide covers typical cheque sizes, dilution and conversion rates at each stage.
What is a fundraising dataroom?+
A fundraising dataroom is the secure online space where a startup gathers the documents investors review during due diligence: the pitch deck, the financial model, the cap table, incorporation papers and IP assignments. Unlike a shared drive folder, it controls who sees what, records who opened which file, and lets you withdraw access when a conversation ends.
How do I find investors for my startup?+
Start by narrowing rather than broadening: stage, sector, cheque size and geography, then a short named list rather than hundreds of addresses. A warm introduction from someone who already backed a company like yours consistently outperforms a cold email. Onefive matches founders with investors on sector, stage and geography, against verified profiles rather than a purchased contact list.
How long does it take to raise a seed round?+
Most European seed processes run four to six months from the first investor meeting to close. DocSend's 2024 research found that the majority of successful seed and pre-seed companies closed in twelve weeks or less, and measured the average investor visit to a seed deck at 3 minutes 44 seconds. A process that stalls while documents are assembled is a process that loses its window.
