Feature flags? PostHog does that.

Safely roll out features to select users or cohorts.

Feature flags are really, really critical for us and you don’t see them as a feature in other analytics tools. They very valuable though, because you can often use feature flag data to make other product decisions.

Francesco Agosti

CTO & Co-founder, Phantom

Choose who gets access to features

Customize your release strategy based on your goals with release conditions.

By percentage of traffic
Roll out a feature to a percentage of all visitors
By user or group properties
Choose specific people, or allow access by user or group property (like organization or multi-seat account)
By cohort
Cohorts can dynamically update with user properties

Multivariate feature flags

Simultaneously test multiple versions against a control group.

Test changes without touching your codebase

After a feature flag is installed, JSON payloads let you make changes to your product or website without subsequent deployments.

This includes text, visuals, or even entire blocks of code.

Automated usage reports

Insights are automatically created for each feature flag, including overall flag usage and usage by specific users

History & activity feed
See who hit a feature flag, the flag’s value, and which page they were on
Local evaluation
Improves speed by caching a flag’s value on initial load
Instant rollbacks
Disable a feature without touching your codebase
Bootstrapping
Get flags and values to trigger changes immediately on page load
Persist flags across authentication steps
Make sure users have a consistent experience after login
Flag administration
See the history of a feature flag or control who can modify flags with user roles
SDKs or API
Copy code snippets for your library of choice, or implement yourself with the API
Multi-environment support
Test flags in local development or staging by using the same flag key across PostHog projects

Pairs with...

PostHog products are natively designed to be interoperable using Product OS.

PostHog vs...

How does PostHog Feature flags compare?

	LaunchDarkly	Optimizely	Flagsmith	GrowthBook	PostHog
Feature flags
Target by percentage
Target by user properties
Flag scheduling
Experimentation
Multivariate flags
Unlimited flags for free
3rd party plugins for free
Activity logs
Data export
Multi-environment support

Docs & resources

Visit docs

Feature flags docs

Tutorials

Blog posts that mention Feature flags

Roadmap

Here's what the Experimentation Team is building next.

Feature flag support for strings (JSON)
Progress
- Feature flag support for Strings
Users & recordings linked to feature flags
We want to make it easier for those who use feature flags to get information on users attached to a particular feature flag, and gather more information on those users' experience through session recordings.
Progress
- See Users & Recordings linked to feature flags