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How to validate a developer tool idea without an audience

Validate a developer tool by shipping the smallest useful version publicly and measuring whether strangers get it working alone: publish a CLI, script or library, post it once where the problem is discussed, and track how many people install it and return within a week. Developers do not respond to landing pages — they respond to working code and a five-minute time-to-value. Ten unprompted stars mean little; ten people using it weekly, and two asking for a hosted version, is validation.

21 days $0 to run6 stepsUpdated 2026

The workflow

0/6 done

  1. Whatever the tool eventually becomes, find the single command or function that delivers the value and ship only that. Developers evaluate in minutes, not meetings, and a tool needing configuration before it does anything useful loses most of its trial audience at install. If your idea cannot be reduced to one command, that reduction is your first design problem.

  2. Time yourself doing a clean install on a fresh machine following only your own README. Anything above five minutes needs cutting, and the usual culprits are credentials, config files and unclear prerequisites. This is the highest-leverage work in developer tools — adoption tracks setup friction more closely than it tracks features.

  3. One post in the place where people complain about the problem — a subreddit, a language-specific forum, a relevant Hacker News thread, a Discord. Lead with the problem and the command, not with your journey. Developer communities are unforgiving about marketing and generous about useful code, and the difference is entirely in the framing.

  4. Stars are a bookmark; installs are curiosity; a second week of use is a signal. Track weekly returning users through package downloads, anonymous telemetry the user opts into, or simply asking. Ten developers using it in week two beats a thousand stars, and founders who optimise for the visible number build tools nobody runs twice.

    Idea ValidatorFull tool
    Input
    CLI that diffs staging and production database schemas. 340 installs first week, 61 in week two, 210 stars, 9 issues opened.
    What comes back
    CONTINUE. 18% week-two retention on a CLI is genuinely strong, and nine issues means people are using it on real projects rather than trying it once. The commercial question is untested: nobody has asked for a hosted version yet, so ask the nine issue-openers directly what they would pay to stop maintaining it themselves.

    Run it yourself — free, no signup:

    Who it's for, what it does, what they pay. The more specific the sentence, the sharper the read.

  5. The business inside a developer tool is almost never the tool — it is the hosting, the team features, the audit trail, the alerting, the compliance. Ask your returning users which part they would pay to stop operating. The answers are consistent and specific, and they tell you what the paid tier is long before you have to guess at one.

  6. Individual developers pay reluctantly for tools; their employers pay routinely for anything that touches reliability, security or on-call. If your validation surfaced a team-level pain, price for the team from the start — and expect to discover it through a returning user asking whether it can run in their CI, which is the question that means a company is involved.

    Pricing GraderFull tool
    Input
    Free CLI, $19/mo individual hosted version, schema-diff tool for backend teams
    What comes back
    The individual tier is the wrong wedge — the pain is CI and on-call, which is company-funded. Keep the CLI free forever, drop the $19 tier, and sell a $99/mo team plan with CI integration, history and alerting. Same product, roughly five times the revenue per account.

    Run it yourself — free, no signup:

    0
    / 100 — Broken

    This page is costing you money from people who already decided to buy. Rebuild it around the unchecked rows before you spend another dollar on traffic.

    Fix in this order
    1. 1.A real price is on the page
    2. 2.Three or fewer plans
    3. 3.The price scales on a value metric

    Weighted by what each one costs you. Do the top item, ship, then measure — fixing all three at once tells you nothing about which worked.

Questions founders ask about this

How do you validate a developer tool without an audience?
Ship the smallest working version publicly and post it once where the problem is discussed. Working code substitutes for reputation with developers, and returning weekly users are the signal — not stars or upvotes.
Do GitHub stars indicate a developer tool has demand?
Barely. Stars are bookmarks and cost nothing. Week-two returning usage, opened issues from real projects, and questions about running it in CI are far better indicators that someone depends on it.
Should a developer tool be open source?
Open source is a distribution strategy for tools developers must trust and inspect. Keep the local tool free and open, and charge for what teams would rather not operate — hosting, history, alerting and access control.
Why do developers refuse to pay for tools?
Individuals often will not, but companies routinely do. The successful pattern is a free tool used by the developer and a paid tier bought by their employer for reliability, collaboration or compliance reasons.
How fast does a developer tool need to be usable?
Under five minutes from a clean machine to first useful output, timed against your own README. Setup friction predicts abandonment more reliably than any missing feature.

Next, founders usually do this

The tools used above have their own pages — Idea Validator and Pricing Page Grader — and the SOP SOP: Validate a SaaS idea in 7 days runs the same ground in more depth. Also worth reading: the Nine Lives Doctrine, and real verdicts from ideas kitty has run this workflow on.

kitty.build runs this entire workflow for you

Every step above — the research, the competitor read, the numbers, the honest verdict — is what nine specialist AI boards do automatically when you feed her an idea. She will tell you to kill it if it deserves killing. First idea is free.

Feed her an idea — free

No card · Failed tasks are free · Your repo, your domain, your revenue