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 $45 per month (indicative, Start-up plan)
Free tierFrom $80 per month (indicative, hosted Pro)
Free tierWhat drives the bill
The metric that actually scales your invoice.
Considerably cheaper than LaunchDarkly, and self-hosting removes usage pricing entirely.
Self-hosted open source is genuinely free; enterprise adds SSO, audit and change requests.
Free tier
Free cloud tier with a monthly request allowance; open-source self-hosting is unlimited.
Open-source edition is free and self-hosted with no user limits.
Open source
BSD-3-Clause (core)
Apache-2.0 (core)
Self-hostable
No-code authoring
Languages
Platforms
Fits teams
Adoption
Established
Flagsmith · since 2018
Widely used
Unleash / Bricks Software · since 2014
Strengths
Limitations
Best for
Teams wanting straightforward flags without LaunchDarkly pricing or Unleash's operational depth.
Privacy-sensitive or cost-sensitive teams that want flags without sending user data to a vendor.
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.