Listed alphabetically. A tool is ranked by its reviews once it has 3.
| Tool | Reviews | Lowest paid plan | Free plan | Free trial | Public API | Runs on | Main features |
|---|---|---|---|---|---|---|---|
 FlagsmithOpen source feature flag service | ReviewsNone yetWrite one for Flagsmith | Lowest paid plan$45per monthStart-Up, as of October 23, 2026 | Free planYes | Free trial14 days | Public APIYes | Runs onSlack | Main features
|
 FliptGit-native feature flags that eliminate deployment fear | ReviewsNone yetWrite one for Flipt | Lowest paid plan$200per monthFlipt Pro, as of October 23, 2026 | Free planYes | Free trial14 days | Public APIYes | Runs onNot confirmed | Main features
|
| GO Feature FlagOpen-source feature flags built on OpenFeature. | ReviewsNone yetWrite one for GO Feature Flag | Lowest paid planSee plans | Free planYes | Free trialNot confirmed | Public APINot confirmed | Runs onNot confirmed | Main features
|
 GrowthBookThe warehouse-native platform for experimentation, feature flags, and product analytics | ReviewsNone yetWrite one for GrowthBook | Lowest paid plan$40per seat per monthPro, as of October 23, 2026 | Free planYes | Free trialNot confirmed | Public APIYes | Runs onSlack | Main features
|
 KameleoonAn AI platform to build, test and roll out experiments in one place. | ReviewsNone yetWrite one for Kameleoon | Lowest paid plan$495per monthPBX Starter, as of October 28, 2026 | Free planNot confirmed | Free trialNot confirmed | Public APIYes | Runs onWeb | Main features
|
 UnleashThe FeatureOps control plane built for enterprises | ReviewsNone yetWrite one for Unleash | Lowest paid plan$75per seat per month, billed monthly by credit cardPay-As-You-Go, as of October 23, 2026 | Free planYes | Free trial14 days | Public APIYes | Runs onSlack | Main features
|
From each tool's own website. “Not confirmed” means we couldn't confirm it there, not that the tool doesn't have it. Each tool's page says when its facts were checked.
How this list is made
A tool is listed here only when we've confirmed on its own website that it has a self-hosted version. Tools we couldn't confirm it for are left out, even if they may have it. Vendors can't pay for a place on this list. Add a tool we missed