Feature flag management tools help teams release changes gradually, turn features on or off without redeploying, and keep risky rollouts contained. This section uses the supplied ToolVitals data for May 2026, including ToolVitals score, health score, shipping score, GitHub stars, status, openness_label, license_label, and pricing_scope.
The ranking includes open/source-visible tools only. Tools are ordered by ToolVitals score first, with GitHub stars used as a secondary popularity signal when scores are close.
Rankings
| Rank | Tool | Openness | License | Health | Shipping | GitHub Stars | Score | Status |
|---|---|---|---|---|---|---|---|---|
| 1 | Go Feature Flag | OSI-approved OSS | MIT | 83 | 87 | 2019 | 87 | 🟢 Excellent |
| 2 | OpenFlags | OSI-approved OSS | MIT | 54 | 41 | 17 | 59 | 🟡 Fair |
| 3 | Switchflag | OSI-approved OSS | MIT | 51 | 24 | 0 | 53 | 🟡 Fair |
| 4 | Flagent | OSI-approved OSS | Apache-2.0 | 46 | 34 | 4 | 52 | 🟡 Fair |
Top 3 Highlights
Go Feature Flag ranks first by a wide margin with a ToolVitals score of 87, a health score of 83, and a shipping score of 87. It is labeled OSI-approved OSS with an MIT license_label, has no listed pricing scope, and has 2,019 GitHub stars, making it the strongest option in this data set on both project score and visible adoption.
OpenFlags ranks second with a ToolVitals score of 59, a health score of 54, and a shipping score of 41. It is labeled OSI-approved OSS with an MIT license_label and no listed pricing scope, but its 17 GitHub stars show a much smaller visible community than Go Feature Flag.
Switchflag ranks third with a ToolVitals score of 53, a health score of 51, and a shipping score of 24. It is labeled OSI-approved OSS with an MIT license_label and no listed pricing scope, but it has 0 GitHub stars in the supplied data, so the ranking is driven by ToolVitals score rather than visible GitHub popularity.
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