Evidence before code

Build what's
worth building.

Cepheus is where founders work out whether the idea holds up — the problem, the people who have it, what already exists, and which parts are actually supported by evidence.

Start your journey See how it works

Free while you explore
10 one-time AI credits
AI only when you ask

cepheus.app / workspace / overviewsample project

Workspace

Overview

Customer Discovery

Market Landscape

Solution

Board

Documents

Build

Flexible housing for movers

Exploring · anchored to a real-world problem

Stage

Exploring

Next move

Talk to 3 people

Problem
People relocating for work can't find flexible housing near the office
Target
Professionals relocating for a job
Insight
Hybrid work moves people more often, for shorter stays

Stage and progress are calculated from your own records — no AI involved.

Click a stage · this is the real workspace, with sample project data

The founder's path

Six stages, in the order that saves you money.

Each stage produces something the next one uses. Nothing is a template you fill in and forget.

The part that matters

Know what you know. Know what you don't.

Good decisions don't need certainty. They need you to know which parts are grounded in evidence and which still have to be tested. Try it on a real interview line.

Raw interview line

“I gave up looking and signed a 12-month lease I didn't want.”

Participant 04 · relocated twice

No model runs here — this is the rule Cepheus applies. One sentence contains a fact, a belief and a gap, and they are not the same thing.

Evidence

Settled for a longer lease than intended

Said, first-hand · P04

Assumption

Would pay more for a shorter stay

You believe it. Nobody said it.

Question

What did they compare before giving up?

Ask this in the next interview

Insight

The constraint is term length, not price

Holds only while 3 of 3 agree

Evidence

What you actually observed or sourced. Keeps its source.

Assumption

What you currently believe. Flagged until something tests it.

Question

What nobody has answered yet. Becomes your next interview.

Insight

What the evidence may be telling you. Never promoted silently.

Honest AI

Ten one-time introductory credits. Spent only when you ask.

AI helps summarise, extract and synthesise. It does not decide, and it does not run in the background — so it can't quietly burn your allowance or turn a guess into a fact.

AI credits · introductory

one-time, no reset

0 / 10credits used

Nothing spent yet. Spend one below and watch it get recorded.

What one credit buys

Ask Cepheus a questionOne reply, with your project as context
Refresh the recommendation with AIOtherwise it is calculated, not generated
Synthesise evidencePatterns across what you already accepted
Extract from an interviewSuggested quotes and pains, for you to accept or reject
Compile a documentBrief assembled from the project, gaps named

Progress, counts, stage and the default recommendation are calculated from your records — no model runs on a page load, so browsing Cepheus is always free.

You can do this in docs. It just won't hold together.

Capability	Cepheus	Docs & whiteboards	A general AI chat
Evidence keeps the interview it came from
Belief and fact are structurally separate
Next move derived from your project state
Says what is missing instead of filling it in
AI cost is capped and visible
Everything in one project context