Validation guides / Dev tool
How to validate a developer tool idea before you build it
The worst way to learn if a developer tool idea will sell is to build it first. Here's how to get real proof of demand in an afternoon — measuring buy-intent, not vanity views — so you only build the ideas people actually want.
The 4-step fake-door test
- 1
Write the promise, not the product
Turn a developer tool idea into a single landing page: a headline, a subtitle, and a “buy” button. No app, no code — just the promise you'd make to a customer.
- 2
Put it in front of the right people
Share the link where this audience already is — Hacker News, r/programming, dev X, and language/framework Discords. A sharp post or a small ad sends enough traffic to read a signal.
- 3
Measure intent, not curiosity
Track who leaves an email and, crucially, who clicks buy. The buy-click is the honest signal: a click on a paid “Team” tier — with devs, any pay-intent above the free-expectation baseline is the real signal.
- 4
Read the rate, then decide
Judge by rate (intent ÷ views), never raw clicks. A big channel inflates volume; the rate tells you if the idea itself has pull.
Why rate beats raw clicks
An idea with 2,000 views and 100 emails (5%) looks like it's winning over one with 80 views and 40 emails (50%) — but the second is 10× more promising. Volume rewards your biggest distribution channel, not your best idea. For a developer tool idea, always compare on rate.
What a good result looks like for dev tool
500
views
11%
email conv.
6%
buy-intent
Dev tools skew free, so a 6% buy-intent rate on 500 HN-style visitors is a genuinely good sign.
Common mistakes validating dev tool ideas
- ✕Devs default to “I’d just build it myself” — test willingness to pay, not just interest.
- ✕Confusing GitHub stars with revenue. Stars are applause, not a business.
- ✕Building an open-source project with no paid wedge and hoping money appears.
Example ideas to test
Spin up a test page for each of these in minutes and let the rate pick the winner:
Stop guessing. Start knowing.
Get real proof for a developer tool idea before it costs you a weekend.
Questions about validating dev tool ideas
How many visitors do I need to validate a developer tool idea?
ProofBench measures a rate, not raw traffic, so even 50-100 targeted visitors give a real read. In the worked example above, 500 visitors were plenty to trust the 6% buy-intent rate.
What's the strongest signal that a developer tool idea will work?
Not an email — a click on a paid “Team” tier — with devs, any pay-intent above the free-expectation baseline is the real signal. A fake-door "buy" click is far closer to money than a signup.
Where do I send my first visitors?
For this category, Hacker News, r/programming, dev X, and language/framework Discords. A single sharp post or a small ad is enough to start collecting signal.
Do I need to build anything to test a developer tool idea?
No. You create a test page in minutes — a headline, a subtitle, and a "buy" button — and measure who signs up and who clicks. You only build the product once the demand is proven.