Test your startup idea before you build it
For solo founders and early-stage teams testing ideas before they commit to building.
Type your startup idea. bl0x runs a real validation test with a landing page, ads, and outreach, so you know if anyone wants it before you build.
How it works
Describe
Type your startup idea in one sentence. That's all bl0x needs.
Test
bl0x launches a landing page, runs real ads, and sends outreach to find demand.
Decide
See who signed up, which message worked, and whether to build, pivot, or kill it.
You don't need to become a marketer
Facebook, Instagram, Google, TikTok, email, ChatGPT — bl0x runs them all. No juggling accounts.
Multiple angles, multiple languages. bl0x writes and tests them — you pick the winners.
Encrypted sandbox. No other user can see your work.
Landing page, ads, outreach, and course correction — live and learning before most teams finish a brief.
What your validation report looks like
... ideas tested. Here's what you get back.
Who responded
Real outreach to real prospects. See who opened, who replied, and what they said.
Which message won
6 angles tested head-to-head. You see which headline, which audience, which pitch converts.
What to do next
Build, pivot, or kill. Based on data, not gut feel, not friend advice. Real market signal.
Validated with bl0x
Real ideas tested with real people. Here's what came out.
Frequently asked questions
Join the founders who test before they build
Every day you spend building an unvalidated idea is a day you could have spent on the one that actually works.