Feature flags
Release to 1%, then to everyone
Boolean and multivariate flags with percentage rollouts, property targeting and JSON payloads, evaluated in the browser, on your server or in your iOS app.
What you can do with feature flags
01
Gradual rollouts
Release to a percentage of users. The hash is deterministic, so a user keeps the same value on every device and visit.
02
Precise targeting
Release groups match on person properties, cohorts or companies: internal users first, then beta customers, then everyone.
03
Payloads and variants
Send a JSON payload with a flag to change copy, limits or layout without a deploy.
04
Fast on the server
The Node.js SDK evaluates flags locally from cached definitions, with no network call per request.
- Instant kill switch
- Usage of each flag in the app
- Bootstrap flags for zero flicker
- Change history
Works with the rest of Tracklyne
- Product analyticsTrends, funnels, retention, paths, stickiness, lifecycle and SQL.
- Web analyticsVisitors, pages, sources and countries, without cookies.
- Session replayWatch real sessions with console, network and events.
- HeatmapsClicks, rage clicks and scroll depth on any page.
- ExperimentsA/B tests on top of flags, with significance computed for you.
- SurveysNPS, ratings and open questions, in-app.
- Error trackingExceptions grouped into issues, with stack traces and replays.
- Data pipelinesWebhook destinations, exports and imports, PostHog included.
- Dashboards & alertsDashboards, alerts, cohorts and notebooks for the team.
Try feature flags on your product
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