IdeaLedger · by Scalable Podcast
Validate a startup idea before building the wrong thing.
A 5-phase method, 15 operational frameworks, and two agent skills that turn startup ideas, decks, and evidence into better decisions.
- Claude · Codex · Antigravity
- No IdeaLedger account required
- Scalable Intelligence optional
- Initial diagnosisWhere the idea or the startup actually stands today.
- Main riskThe one assumption that would break everything if false.
- Recommended toolOne of the 15 frameworks — only if it fits the risk.
- Next evidenceWhat you have to go and collect before the next decision.
Two ways to use IdeaLedger
Pick based on the decision you have to make, not on the tool you want to use.
I'm validating my own idea
IdeaLedger Method starts from wherever you are, finds the most urgent risk and applies the right tool: customer discovery, market sizing, MVP, first customers, metrics or fundraising.
Output: a validation dossier, an Evidence Ledger and your next actions.
I'm evaluating a startup
IdeaLedger Evaluator helps angels, scouts, accelerators and open-innovation teams turn pitch decks, one-pagers and founder calls into a structured risk diagnosis.
Output: a risk memo, questions for the founder and the next checks to run.
IdeaLedger Evaluator produces a preliminary risk diagnosis, not an investment recommendation.
From the question to the dossier
The flow is the same for the Founder Skill and the Evaluator Skill: what changes is the input material, not the method.
Install the skill
Pick the Founder or Evaluator version and install it in the AI environment you already use.
Give it the context
Describe the idea, or upload pitch decks, one-pagers, notes and any material you already have.
Follow the diagnosis
IdeaLedger identifies the main risk and applies only the tools that are actually useful.
Collect evidence
You get a local dossier, the questions still open and the next actions to take.
The free version requires no IdeaLedger account. What you provide is still processed by the AI platform you are using.
Why — why IdeaLedger exists
Most founders don't fail from a lack of ideas.
They fail because they turn an intuition directly into a product, without ever stopping to ask what must be true for that intuition to actually work. The result is always the same: months of work, a well-built product, and nobody buying it.
Every startup idea contains three overlapping levels that rarely align:
The intuition — often right, often partial. It's the starting point, not the destination.
Real customer behaviour, often different from expectations. Not what they say — what they do.
Measurable reality, rarely pleasant. The only foundation worth building on.
It's not a business plan. It's not a pitch deck. It's not a motivational checklist. It's a disciplined way to understand what must be true for the idea to work.
How — how the method works
The IdeaLedger Method — 5 phases
An operational path that takes a raw idea all the way to the first real market evidence, phase by phase.
You don't have to start from Phase 1: IdeaLedger picks the entry point based on the risk and on the evidence you already have.
What — the operational guides
15 tools, one for every node in the journey
Each tool has its own guide, linked to a European startup analyzed on Scalable Podcast. Not sure where to start? Start from the risk you want to reduce.
Clarify and stress-test the idea
Explain the idea in one sentence — then break it before the market does.
Idea Stress Test
Pressure-test the idea before you spend months on it: surfaces the hidden assumptions and the questions you cannot yet answer.
Open the guide →Lean Canvas
Turns the intuition into a one-page business model: problem, segment, solution, channels and defensible advantage.
Open the guide →Validate the problem
Understand how the customer lives the problem today, before you exist.
Define customer, market and competition
A segment is not a market: define who buys, what it's worth and what you have to beat.
Buyer Persona
Makes the buying decision concrete: role, budget, selection criteria and the recurring objections of the real decision-maker.
Open the guide →TAM / SAM / SOM
Sizes the market in a defensible way: from the theoretical total to what you can realistically serve in the next few years.
Open the guide →Competition & Status Quo
Maps direct and indirect competitors, and above all the status quo: the spreadsheet, the phone call, doing nothing at all.
Open the guide →Go-to-market and first customers
Turn validation into traction with the smallest possible product.
First 10 Customers
An operational plan to find your first ten customers by hand: channels, message and verifiable weekly milestones.
Open the guide →Go-to-Market Strategy
Turns validation into traction: priority segment, repeatable channel, message and acquisition engine.
Open the guide →MVP in 2 Weeks
The smallest experiment that answers your most dangerous hypothesis with a yes or a no. Build that, and nothing more.
Open the guide →Scale and fundraising
Show the numbers hold up before you scale and before you talk to investors.
Product-Market Fit
The signals that separate interest from real demand: retention, repeat usage and revenue that renews itself.
Open the guide →KPI for Startups
Which metrics actually matter at each stage, and how to tell decision-driving numbers from vanity metrics.
Open the guide →Unit Economics
Understand whether growth makes you money or bleeds you dry: CAC, LTV, contribution margin and payback period.
Open the guide →The Stages of a Startup
Where your startup actually stands and what work matters now: priorities, risks and milestones for each stage.
Open the guide →Pitch Deck
The narrative structure an investor expects: problem, evidence, market, traction and the ask.
Open the guide →Fundraising
How a raise actually works: timing, instruments, dilution and what must be true before you start.
Open the guide →Scalable Intelligence · optional add-on
When the method meets real startup data
The free skills run the entire IdeaLedger method. Scalable Intelligence adds comparables and benchmarks drawn from the Scalable database of over 2,000 European startups.
- Compare startups in the same sector, country or stage
- Use real benchmarks for market, competition and fundraising
- Spot patterns and comparable cases in the Scalable database
| Feature | Free skill | Scalable Intelligence |
|---|---|---|
| Full method | Included | Included |
| Local dossier | Included | Included |
| Comparables from the Scalable database | Not included | Included |
| Benchmarks by sector and stage | Not included | Included |
Comparables provide context and benchmarks. They are not problem validation and not investment advice.
Keep building your Evidence Ledger
Every week: European startup analysis, frameworks applied in practice, and new cases from the Scalable database.
Frequently asked questions
What's included, what isn't, and what happens to your material.
Is IdeaLedger free?
Yes. The method, the 15 guides and both IdeaLedger agent skills are free. Scalable Intelligence is a separate, optional add-on.
Which skill should I choose?
The Founder Skill if you are validating your own idea. The Evaluator Skill if you are assessing someone else's startup — as an angel, scout, accelerator, incubator, venture studio or corporate open-innovation lead.
Which platforms does it run on?
The skills are written in the standard SKILL.md format and run on Claude, OpenAI Codex and Google Antigravity.
Are my materials uploaded to the IdeaLedger site?
No. The free version uses no IdeaLedger backend and requires no account: dossiers stay as local files on your machine. What you provide is however processed by the AI platform you are using, under its own terms.
What does Scalable Intelligence add?
It adds comparables and benchmarks drawn from the Scalable database of over 2,000 European startups, pulled in via API during the analysis. The method itself is unchanged.
Does IdeaLedger Evaluator give an investment recommendation?
No. It produces a preliminary risk diagnosis, the questions to ask the founder and the next checks to run. The investment decision stays with you.
Which risk do you want to reduce first?
Pick your path, install the skill for free, and start from the decision you have to make today.