Ship behind a flag in 30 seconds.
Wrap any change in a flag, deploy to production, and control the rollout from the dashboard. No code redeploys, no late-night rollbacks.
What you get
Built for teams that deploy multiple times a day.
Wrap any change in a flag, deploy to production, and control the rollout from the dashboard. No code redeploys, no late-night rollbacks.
1%. 10%. 50%. 100%. Move the slider when you're ready. Roll back instantly if you're not.
One toggle disables a broken feature for everyone, everywhere, in under 50ms.
Ship to specific users, plans, regions, or any custom rule you can write.
Errors, latency, engagement — watch them move as your flag rolls out. No tab-switching, no waiting for the next dashboard refresh.
For developers
Native SDKs for every language your team writes.
import { Booleans } from '@booleans/sdk'
const flags = new Booleans({ apiKey: process.env.BOOLEANS_KEY })
if (await flags.check('new-checkout', user)) {
return <NewCheckout />
}
return <Checkout />This is a real flag
This toggle is a Booleans flag wired into this page. That's exactly how it works in production.
Your first 10,000 evaluations are free. No credit card.
Start freeUsed by teams at Linear, Vercel, Cursor, Resend, and 2,000+ more.