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From idea to
funded startup.

Zero to One is a 12-week accelerator for pre-seed founders. We invest €500K, open our network, and help you build the company you imagined.

500 k€
Invested per startup
120+
Portfolio companies
2,1 Md€
Combined valuation
84%
Follow-on rate

Portfolio

Companies we've backed

Flux AI
Flux AI
AI/ML
W23
Raised$4.2M
Vanta Pay
Vanta Pay
Fintech
S23
Raised$8.1M
NeuraStack
NeuraStack
Developer Tools
W23
Raised$3.5M
Clio Health
Clio Health
HealthTech
S22
Raised$6.8M
Arco Climate
Arco Climate
CleanTech
W22
Raised$12M
Forma Studio
Forma Studio
Design Tools
S23
Raised$2.9M

The Program

12 weeks. Zero fluff.

A structured sprint from idea validation to Series A readiness. Every week has a purpose.

Phase 1
Weeks 1–4

Foundation

  • Problem-market fit validation
  • User interview sprints (50 interviews)
  • ICP definition workshop
  • Revenue model architecture
Phase 2
Weeks 5–8

Build & Validate

  • MVP development sprints
  • First paying customers
  • Retention and NPS tracking
  • Growth loop identification
Phase 3
Weeks 9–12

Scale & Raise

  • Series A deck preparation
  • Investor introductions (200+)
  • Pitch coaching with GPs
  • Demo Day (500 attendees)

What you get

More than capital.

We built Zero to One because we know what founders actually need. Not just money — but the right introductions, the hard feedback, and the community that keeps you going.

500 k€ investis
No strings, no advisor shares, no board seat required.
120+ mentor network
Des dirigeants qui ont bâti des entreprises à plus de 100 M€.
Investor warm intros
200+ VCs and angels at Demo Day. Warm intros to the right ones.
Lifetime alumni access
Perks, events, and co-founder matching — forever.
Founders at Zero to One
Next Demo Day
14 mars 2027 · Paris
500 attendees

Mentors

Learn from the best.

Sarah Chen
Sarah Chen
Partner @ Sequoia
Growth
Marcus Reid
Marcus Reid
Founder @ Linear
Product
Priya Nair
Priya Nair
CTO @ Stripe
Engineering
Tom Brandt
Tom Brandt
GP @ a16z
GTM

FAQ

Common questions

How much equity do you take?
Is the program remote or in-person?
What stage do you invest at?
When is the next application deadline?

Apply Now

Build something
that matters.

Applications for Cohort W24 are open. 20 companies selected. We read every application.

Date limite : 15 novembre 2026 · Réponses le 1er décembre

Portfolio

Companies we've backed

120+ startups across AI, fintech, health, climate, and developer tools. Here are some of the teams we're proudest to partner with.

120+
Companies funded
2,1 Md€
Combined valuation
84%
Follow-on rate
6
Unicorn-track startups
Flux AI

Flux AI

AI/ML
Cohort W23

Flux AI builds foundational models for real-time video generation. Their diffusion architecture processes 4K frames 12× faster than competitors, powering creative tools for filmmakers and game studios worldwide.

Raised
$4.2M
Team
32 people
Growth
18× ARR YoY
HQ
San Francisco, CA
Investors: Sequoia, a16z, Zero to One
Vanta Pay

Vanta Pay

Fintech
Cohort S23

Vanta Pay is rebuilding cross-border payments for African merchants. Their instant settlement rails handle $2B+ annually, enabling SMBs across 14 countries to accept payments in local currencies with sub-1% fees.

Raised
$8.1M
Team
85 people
Growth
4.2× transaction volume YoY
HQ
Lagos & London
Investors: Stripe, Y Combinator, Zero to One
NeuraStack

NeuraStack

Developer Tools
Cohort W23

NeuraStack provides an AI-native observability platform for engineering teams. Their anomaly detection engine surfaces production issues 40 minutes before traditional monitoring, used by 400+ engineering orgs.

Raised
$3.5M
Team
28 people
Growth
320% user growth in 12 months
HQ
Berlin, Germany
Investors: Index Ventures, Zero to One
Clio Health

Clio Health

HealthTech
Cohort S22

Clio Health uses LLMs to automate clinical documentation for doctors. Physicians save an average of 2 hours per day, reducing burnout and improving patient outcomes across 200+ clinics.

Raised
$6.8M
Team
54 people
Growth
6× clinic partnerships in 6 months
HQ
Boston, MA
Investors: General Catalyst, Zero to One
Arco Climate

Arco Climate

CleanTech
Cohort W22

Arco Climate builds carbon accounting software for industrial manufacturers. Their IoT sensor network provides real-time Scope 1-3 emissions tracking, helping Fortune 500 companies meet ESG targets.

Raised
$12M
Team
72 people
Growth
$8M ARR, doubling annually
HQ
Paris, France
Investors: Lowercarbon Capital, Breakthrough Energy, Zero to One
Forma Studio

Forma Studio

Design Tools
Cohort S23

Forma Studio is a collaborative 3D design tool for product teams. Their browser-based engine renders production-quality models in real-time, replacing legacy desktop CAD software for 15,000+ designers.

Raised
$2.9M
Team
19 people
Growth
200% MoM in first 6 months post-launch
HQ
Stockholm, Sweden
Investors: Accel, Zero to One

Want to be on this list?

The Program

12 weeks that change everything.

Our accelerator is structured around three phases — Foundation, Build, and Scale. Each week has specific deliverables, workshops, and office hours designed to move you forward faster than you thought possible.

€500K
Direct investment
120+
Mentors & advisors
48
Workshops & sessions
Paris
In-person program

Phase 1 — Foundation

Weeks 1–4

Week 1

Problem Validation Sprint

  • Onboarding & cohort kickoff dinner
  • Problem statement workshop with mentors
  • Competitive landscape deep-dive
  • Set up 25 customer discovery interviews
Week 2

Customer Discovery

  • Complete 50 user interviews
  • Synthesize pain points into insight map
  • ICP (Ideal Customer Profile) definition
  • Office hours: Sarah Chen (Growth)
Week 3

Market Sizing & Positioning

  • TAM/SAM/SOM analysis workshop
  • Positioning & messaging framework
  • Pricing strategy fundamentals
  • Office hours: Tom Brandt (GTM)
Week 4

Revenue Architecture

  • Business model canvas v2
  • Unit economics deep-dive
  • Revenue model stress-testing
  • Phase 1 checkpoint — present to partners

Phase 2 — Build & Validate

Weeks 5–8

Week 5

MVP Sprint Kickoff

  • Define MVP scope (max 3 features)
  • Technical architecture review with Priya Nair
  • Sprint planning & milestone setting
  • Cloud credits activation ($100K in AWS/GCP)
Week 6

Build & Ship

  • Daily standups with engineering mentor
  • UX review session with design partners
  • Landing page & waitlist optimization
  • Office hours: Marcus Reid (Product)
Week 7

First Customers

  • Launch to first 10 paying customers
  • Onboarding flow optimization
  • Set up retention & NPS tracking
  • Customer feedback synthesis workshop
Week 8

Growth Loops

  • Identify primary growth loop
  • Referral & viral mechanics workshop
  • Metrics dashboard setup (key KPIs)
  • Phase 2 checkpoint — present metrics to partners

Phase 3 — Scale & Raise

Weeks 9–12

Week 9

Fundraising Foundations

  • Investor narrative crafting workshop
  • Financial model & projections review
  • Term sheet fundamentals with Tom Brandt
  • Build target investor list (200+)
Week 10

Pitch Perfect

  • Pitch deck v1 review with all partners
  • Story structure coaching session
  • Practice pitch (recorded + feedback)
  • 1:1 investor intro strategy meetings
Week 11

Investor Roadshow

  • Warm intros to 50+ target investors
  • Back-to-back pitch meetings
  • Follow-up & data room preparation
  • Live deal negotiation coaching
Week 12

Demo Day & Beyond

  • Final pitch rehearsals
  • Demo Day — 500 investors & press
  • Post-Demo Day investor follow-up
  • Alumni onboarding & lifetime access activation

Weekly Schedule

Monday
9:00 AM
Cohort standup & weekly sprint planning
Monday
2:00 PM
Workshop session (rotating topics)
Tuesday
10:00 AM
1:1 office hours with assigned mentor
Tuesday
4:00 PM
Product review & design critique
Wednesday
9:00 AM
Guest speaker fireside chat
Wednesday
2:00 PM
Peer feedback & founder roundtable
Thursday
10:00 AM
Technical deep-dive (engineering focus)
Thursday
3:00 PM
Investor readiness session
Friday
10:00 AM
Demo & progress review
Friday
6:00 PM
Cohort social & networking dinner

Ready for the most intense 12 weeks of your life?

Mentors

Learn from operators, not observers.

Our mentors have built, scaled, and invested in companies worth billions. They've lived through the problems you're facing — and they're here every week to help you solve them.

Sarah Chen

Sarah Chen

Growth

Partner @ Sequoia

Sarah Chen is a Partner at Sequoia Capital, where she leads early-stage investments in consumer and enterprise SaaS. Before joining Sequoia, Sarah was VP of Growth at Notion, where she scaled the product from 1M to 30M users in under three years. She started her career as a product manager at Google, working on Search and YouTube growth. Sarah holds an MBA from Stanford GSB and a BS in Computer Science from MIT. She's passionate about helping founders find their first 1,000 true fans.

Companies built
Notion (VP Growth), Google (PM)
Investment thesis
PLG, community-driven growth, bottom-up SaaS
Expertise areas
Growth loops, retention, pricing, GTM
15+ years in tech · 40+ portfolio companies · 3 unicorns backed
Marcus Reid

Marcus Reid

Product

Founder @ Linear

Marcus Reid is the co-founder and CEO of Linear, the project management tool loved by thousands of engineering teams. Before Linear, Marcus spent 6 years at Uber as a Staff Product Manager, where he led the Rider Experience team across 70+ countries. He previously co-founded a developer tools startup that was acquired by Atlassian in 2016. Marcus is known for his obsession with product craft — he believes great products are built through relentless simplification, not feature addition. He advises our founders on product-market fit, user experience, and building opinionated products.

Companies built
Linear (CEO), Uber (Staff PM), Atlassian (acquired)
Investment thesis
Opinionated tools, developer-first products
Expertise areas
Product-market fit, UX, roadmap prioritization
12+ years in product · 2 companies built · 1 acquisition
Priya Nair

Priya Nair

Engineering

CTO @ Stripe

Priya Nair is the CTO of Stripe, where she oversees a 3,000-person engineering organization building the economic infrastructure for the internet. Before Stripe, Priya was an engineering director at Meta, leading the Payments & Commerce infrastructure team that processed $100B+ in annual transactions. She started her career at Amazon Web Services, where she helped launch DynamoDB. Priya is deeply technical and brings a systems-thinking approach to startups — she helps founders make the right architecture decisions early, build engineering culture, and hire their first 10 engineers.

Companies built
Stripe (CTO), Meta (Eng Dir), AWS (DynamoDB)
Investment thesis
Infrastructure, fintech, deep-tech platforms
Expertise areas
System design, scaling, eng hiring, tech debt
18+ years in engineering · 3,000+ engineers managed · $100B+ infrastructure
Tom Brandt

Tom Brandt

GTM

GP @ a16z

Tom Brandt is a General Partner at Andreessen Horowitz, where he focuses on enterprise SaaS and go-to-market strategy. Before a16z, Tom was the co-founder and CEO of Lever (acquired by Employ Inc. in 2022), an ATS used by 5,000+ companies worldwide. He previously led sales at Palantir during its hypergrowth phase, scaling the enterprise team from 15 to 200+ reps. Tom is an expert at helping founders navigate the messy early days of enterprise sales — building pipeline, closing first customers, and figuring out pricing. He runs a weekly office hour on fundraising and GTM for our cohort.

Companies built
Lever (CEO, acquired), Palantir (Sales Lead)
Investment thesis
Enterprise SaaS, vertical software, sales-led growth
Expertise areas
GTM strategy, enterprise sales, pricing, fundraising
14+ years in GTM · 1 exit · $2B+ AUM at a16z

Want to work with these mentors?

Cohort W24 — Applications Open

Start your application

Apply to the Zero to One 12-week accelerator. We invest €500K and help you scale. Takes ~15 minutes to complete.

Deadline: 15 novembre 2026. Results by 1 décembre 2026.

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Last updated: juin 2026

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