Feature checklists rarely decide anything. What decides it is the pricing metric, who has to write the tests, and which limitation you can live with.
Entry price
From $80 per month (indicative, hosted Pro)
Free tierFrom $12 per seat/month plus context-based usage (indicative)
PaidWhat drives the bill
The metric that actually scales your invoice.
Self-hosted open source is genuinely free; enterprise adds SSO, audit and change requests.
Priced on seats plus monthly contexts (roughly, unique users evaluated). High-traffic consumer products get expensive.
Free tier
Open-source edition is free and self-hosted with no user limits.
14-day trial; no permanent free tier.
Open source
Apache-2.0 (core)
Self-hostable
No-code authoring
Languages
Platforms
Fits teams
Adoption
Widely used
Unleash / Bricks Software · since 2014
Category standard
LaunchDarkly · since 2014
Strengths
Limitations
Best for
Privacy-sensitive or cost-sensitive teams that want flags without sending user data to a vendor.
Engineering organisations where flags are critical infrastructure and governance is required.
All of these integrate with: Datadog, Slack, Jira, Terraform.
Pricing last reviewed August 2026 and is indicative only — confirm on each vendor’s own page.