the reactor
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the reactor
◆ ~5 min survey

The Community for Startups.

Help for first-time founders. One place to work through what to do next, whether anyone wants it, and who can help — no fixed syllabus.

  • Do next — ranked moves, not a score on your idea
  • Evidence — interviews, surveys, who reacted
  • Who can help — mentors and peers by expertise
  • Documentation kit — one intake, plan, deck, personas
  • Private — until you're ready to share
Take the survey →

No account needed. About five minutes.

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The Reactor
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The Reactor

Guidance and support for first-time founders.

5 assumptions3 evidence2 mentors○ Public

One place to work through what to do next, whether anyone wants it, and who can help — no fixed syllabus.

Do next
Test: founders adopt it inside their communityLog one more interview this week
Test it →
Fill the one-page briefProblem and customer still thin

Help us build it

We are in active development with a real cohort. Take a short survey — about five minutes, no account needed — and tell us what would actually help.

Take the survey →
How it works

One place, three questions.

What do I do next? Does anyone actually want this? Who can help? Work in any order — nothing is a gate, and your idea is never scored.

Do next

Ranked by what moves the idea most — not by a score.

  • Every item opens the right form
  • Assumptions and evidence on one register
  • No viability bar — just what is still missing
Take the survey →
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The Reactor
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Do next
Test: a community will pay once founders adopt itHighest-risk assumption — no evidence yet
Test it →
Gather one more data point on interview loggingUnder 30 seconds is still unproven
Ask the community for co-foundersNeeds listed — no offers yet
Evidence

Does anyone actually want this?

  • Test assumptions — log interviews, surveys, reactions
  • Build a survey in minutes, send one link
  • A count of what happened — never a grade on your idea
Take the survey →
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Evidence

Assumptions, interviews, surveys — one register.

Founders adopt it inside their communityTesting · 1 interview logged
Test it →
Surveys
How do you track idea validation today?14 responses · live
Live
People

Who can help — mentors, peers, and more.

  • Find mentors by expertise, not a warm-intro lottery
  • Request a chat in one step
  • One account, many badges — founder, scout, mentor
Take the survey →
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People

Browse by role and expertise, then reach out with a specific question.

Any roleAny expertiseA to Z
Mentors
Kwame OseiGo-to-market · 3 mentoring
Mentor
Rachel MertonFinance · 3 intros offered
Mentor
Capture & build

Get the idea down once. Every answer feeds the kit.

  • Quick capture or a guided intake — work in any order
  • Change an answer, every document that uses it updates
  • Copy a prompt for your own LLM — nothing auto-applied
The documentation kit
  • Business plan
  • Company profile
  • Response deck
  • Investor deck
  • Brand guidelines
  • Brand persona
  • Ideal customer persona
  • My user manual
  • Web design brief
  • Products and services
  • Financial model inputs
  • Operational model inputs
  • Organisation chart
  • Shareholding and equity
  • Elevator pitch & founder bio
Take the survey →
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Start a new project

Guided intake — answer once, reuse everywhere.

1The basics✓Solution3Market4Customer
The basics · 1 of 23

What are you calling it?

The Reactor
← BackContinue
Publish

Private, community, or public — you choose the audience.

  • Private means private — not even programme hosts can look inside
  • Ask mentors to review; pick what shows on the public page
  • Public share pages end in a demand test — real interest, not just views
Take the survey →
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The Reactor
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Share & review — "The Reactor"
General access
○ Public — anyone with the link
Ask for review
They get a request in their inbox.
RRachel MertonMentor
Send review request
Respond

Reviews, intros, and offers land in one inbox.

  • "Needs you" — review requests, help offers, introductions
  • Community announcements and activity in one feed
  • Scouts react on other people's projects without starting their own
Take the survey →
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Hi Aman

What needs you, and your next move.

Needs you
Rachel Merton asked you to review The ReactorMentor · this morning
Review
Kwame Osei offered an introductionTo a payments lead he used to work with
Take the survey →

No account needed. About five minutes.

For mentors

Advise on the record — not a rehearsed pitch.

  • Be findable on People by expertise and role
  • Accept review requests — read the register, not a deck
  • Leave mentor feedback that is tagged distinctly from peer reactions
  • Carry assigned projects from your Home and profile
Take the survey →
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The Reactor
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The Reactor

Review for Rachel Merton — assumptions and evidence.

Register
Founders adopt it inside their community1 supporting · testing
Leave mentor feedback
Strongest on interview logging — worth testing with one more founderDraft · not sent yet
Mentor
For programmes

Run the cohort — spot who is stuck, assign mentors, nudge founders.

  • Needs attention queue — stalled projects, open flags, idle mentors
  • Mentor matching and assignment grid
  • Pitch deck submissions, announcements, curated resources
  • No ranking founders by evidence count
CohortsCompaniesUniversitiesNetworks
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Needs attention

Each row has an action — it disappears when handled.

FairSplit — no mentor assigned3 weeks · assign mentor
Assign
AirCool — no evidence logged yetFounder · nudge
Nudge
Roster
8 founders4 mentors2 facilitators
All of it, in one place

Everything you get.

The full product for founders, mentors, and programmes — your idea is never scored.

Do next and evidence

  • Ranked moves — not a viability score
  • Assumptions, interviews, and surveys on one register
  • Log evidence against contacts in under a minute
  • See what is still missing, not whether you passed

Documentation kit

  • 13 documents from one guided intake
  • Change an answer — every doc stays in step
  • One-pager, pitch deck, personas, and more
  • Copy prompts for your own LLM — nothing auto-applied

Publish and share

  • Private, community, or public — you choose
  • Ask mentors to review specific sections
  • Chrome-free public share page
  • Demand test at the end — real interest, not just views

People and inbox

  • Find mentors and peers by expertise
  • Reviews, intros, and offers in one place
  • Mentor feedback tagged distinctly from peers
  • Scouts react without starting their own project

For programmes

  • Needs-attention queue for stalled founders
  • Mentor matching and assignment
  • Announcements and a curated resource library
  • No ranking founders by evidence count

Built for real cohorts

  • Works on your own or inside a programme
  • Accounts and sign-in live today
  • Private by default until you widen access
  • Keep your work when a programme ends
Pricing

Start free. Upgrade for the price of a coffee.

If a community you belong to has a licence, you already have everything.

Free
$0forever

Get one idea out of your head and in front of people.

  • One project
  • Quick capture and guided intake
  • Publish to your community
  • The one-page brief
  • Feedback, intros and offers of help
  • The full document kit
  • Surveys and contacts
Coming soon
Premium
Coming soon

Everything, for as many ideas as you have. Pricing lands after the pilot.

  • Unlimited projects
  • All 13 documents
  • Surveys with live results
  • Contacts and version history
  • Every AI assist, with your own model
  • A public page with a demand test
  • Keep everything when a programme ends
Communities
Contact usannual licence

A licence for a cohort, company, university or network.

  • Premium for every member
  • Every project at a glance
  • Visibility policy and announcements
  • A resource library you curate
  • Assign mentors, flag, nudge
  • Priced on members and cohorts
  • Members keep their work afterwards
What hosts get

This is a working prototype. Nothing is charged and no payment details are collected anywhere. The prices above are the intended model, not a live checkout.

Questions

The things people ask first.

Is this finished?

No, and we would rather say so. It is a working prototype in active development, built alongside a real cohort instead of in a vacuum. Accounts and sign-in work today; we are still filling out the document kit and tightening the pilot flows.

Your idea is never scored — do next ranks what might move it forward, not whether it is "good enough".

How is this different from a business plan tool?

LivePlan and the rest write you one document, on your own. The Reactor builds the whole set from a single intake, keeps them consistent with each other, and puts your work in front of people who can actually help.

Why not just use a doc and ChatGPT?

You can, and most founders do. The problem is nothing compounds: you rewrite the same facts in five places, they drift apart, and none of it is shareable as one coherent thing.

Here you answer once, everything stays in step, and you send one link at whatever fidelity you choose.

Do I need to be in a programme?

No. It works perfectly well on your own, and you can publish to invited people or to a public page without belonging to anything. If your accelerator, university or company does have a licence, you get Premium free while it runs.

Who owns what I write?

You do. If you joined through a programme and it ends, your projects and documents stay yours: you carry them onto a free or personal plan rather than losing them.

How is my idea kept private?

Private is the default and it means private: only you, plus anyone you explicitly invite. Not even a programme host can look inside a private project. You choose when to widen it, and you can narrow it again.

Your idea deserves better than a folder.

Answer a few questions and watch it start becoming a company. Show it to whoever you like, whenever you are ready.

Take the survey →

No account needed. About five minutes.

the reactor
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Help us build The Reactor — take the survey, join the waitlist, and we will email when it opens.