Choosing a feature flag management tool means balancing capabilities with signs of current project health. This October 2026 comparison uses the supplied ToolVitals dataset, including ToolVitals, health, shipping, openness, license, and GitHub-star fields.
The ranking covers open/source-visible tools only. Tools are ordered by ToolVitals score descending, with health and shipping used to break equal scores. GitHub stars provide context only and do not determine placement.
Rankings
| Rank | Tool | Openness | License | Health | Shipping | GitHub Stars | Score | Status |
|---|---|---|---|---|---|---|---|---|
| 1 | Flagsmith | OSI-approved OSS | BSD-3-Clause | 97 | 96 | 6610 | 97 | 🟢 Excellent |
| 2 | GrowthBook | OSI-approved OSS | MIT | 96 | 95 | 8512 | 96 | 🟢 Excellent |
| 3 | Unleash | OSI-approved OSS | AGPL-3.0 | 96 | 94 | 13892 | 96 | 🟢 Excellent |
| 4 | Go Feature Flag | OSI-approved OSS | MIT | 95 | 95 | 2125 | 95 | 🟢 Excellent |
| 5 | Flipt | OSI-approved OSS | MIT | 94 | 92 | 4923 | 93 | 🟢 Excellent |
| 6 | FeatBit | OSI-approved OSS | MIT | 91 | 88 | 1946 | 89 | 🟢 Excellent |
| 7 | Flipper | OSI-approved OSS | MIT | 86 | 80 | 3972 | 84 | 🟢 Excellent |
| 8 | Featurevisor | OSI-approved OSS | MIT | 55 | 31 | 812 | 46 | 🟡 Fair |
| 9 | ConfigDN | OSI-approved OSS | AGPL-3.0 | 46 | 33 | 2 | 40 | 🟡 Fair |
| 10 | Rollout.io | OSI-approved OSS | Apache-2.0 | 14 | 4 | 23 | 10 | 🔴 Needs Attention |
| 11 | Flagbridge | OSI-approved OSS | Apache-2.0 | 10 | 2 | 2 | 7 | 🔴 Needs Attention |
| 12 | Switchflag | OSI-approved OSS | MIT | 9 | 0 | 0 | 6 | 🔴 Needs Attention |
| 13 | OpenFlags | OSI-approved OSS | MIT | 8 | 2 | 16 | 6 | 🔴 Needs Attention |
| 14 | Flagent | OSI-approved OSS | Apache-2.0 | 8 | 2 | 4 | 5 | 🔴 Needs Attention |
| 15 | Bandeira | OSI-approved OSS | MIT | 7 | 2 | 19 | 5 | 🔴 Needs Attention |
| 16 | Abby | OSI-approved OSS | AGPL-3.0 | 1 | 0 | 166 | 1 | 🔴 Needs Attention |
| 17 | Flagasaurus | OSI-approved OSS | MPL-2.0 | 0 | 0 | 16 | 0 | 🔴 Needs Attention |
| 18 | SwitchFeat | OSI-approved OSS | AGPL-3.0 | 0 | 0 | 205 | 0 | 🔴 Needs Attention |
Top 3 Highlights
Flagsmith ranks first with a ToolVitals score of 97, a health score of 97, and a shipping score of 96. Its supplied first-party description identifies it as an open source feature flagging and remote config service with self-hosted and hosted options. The dataset lists its openness_label as OSI-approved OSS and its license_label as BSD-3-Clause.
GrowthBook ranks second with a ToolVitals score of 96, a health score of 96, and a shipping score of 95. Its supplied first-party description covers open source feature flags, experimentation, and product analytics. The dataset lists its openness_label as OSI-approved OSS and its license_label as MIT; its 8,512 GitHub stars are context only.
Unleash ranks third with a ToolVitals score of 96 and a health score of 96. Its shipping score of 94 places it behind GrowthBook on the stated tie-break. The supplied first-party description calls it an open-source feature management platform, and the dataset lists its openness_label as OSI-approved OSS and its license_label as AGPL-3.0.
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