Teams comparing Feature Flag Management Tools in June 2026 need to separate maintained, source-visible options from projects that may not be shipping much.
The ranking includes open/source-visible tools only and sorts first by ToolVitals score, with GitHub stars used only as a secondary popularity signal. License and openness are reported exactly from the data, including OSI-approved OSS labels and the listed MIT, Apache-2.0, AGPL-3.0, and MPL-2.0 licenses.
Rankings
| Rank | Tool | Openness | License | Health | Shipping | GitHub Stars | Score | Status |
|---|---|---|---|---|---|---|---|---|
| 1 | Go Feature Flag | OSI-approved OSS | MIT | 85 | 90 | 2044 | 90 | 🟢 Excellent |
| 2 | Rollout.io | OSI-approved OSS | Apache-2.0 | 65 | 70 | 20 | 75 | 🟢 Good |
| 3 | Flipper | OSI-approved OSS | MIT | 77 | 36 | 3954 | 69 | 🟢 Good |
| 4 | Featurevisor | OSI-approved OSS | MIT | 64 | 18 | 802 | 56 | 🟡 Fair |
| 5 | Flagbridge | OSI-approved OSS | Apache-2.0 | 46 | 34 | 2 | 55 | 🟡 Fair |
| 6 | ConfigDN | OSI-approved OSS | AGPL-3.0 | 51 | 19 | 2 | 51 | 🟡 Fair |
| 7 | Switchflag | OSI-approved OSS | MIT | 44 | 7 | 0 | 44 | 🟡 Fair |
| 8 | OpenFlags | OSI-approved OSS | MIT | 27 | 4 | 17 | 36 | 🔴 Needs Attention |
| 9 | Flagent | OSI-approved OSS | Apache-2.0 | 29 | 4 | 4 | 36 | 🔴 Needs Attention |
| 10 | Bandeira | OSI-approved OSS | MIT | 27 | 4 | 19 | 33 | 🔴 Needs Attention |
| 11 | Flagasaurus | OSI-approved OSS | MPL-2.0 | 26 | 0 | 17 | 29 | 🔴 Needs Attention |
| 12 | SwitchFeat | OSI-approved OSS | AGPL-3.0 | 6 | 0 | 205 | 21 | 🔴 Needs Attention |
Top 3 Highlights
Go Feature Flag ranks first with a ToolVitals score of 90, the highest shipping score in the set at 90, and an Excellent status.
Rollout.io ranks second with a ToolVitals score of 75 and a Good status. Its GitHub star count is modest at 20, but it scores ahead of higher-star projects because the ranking prioritizes ToolVitals score over popularity. It is listed as OSI-approved OSS under the Apache-2.0 license.
Flipper ranks third with a ToolVitals score of 69 and the largest GitHub audience in the set at 3,954 stars. Its health score is strong at 77, but its shipping score is lower at 36, which keeps it behind Go Feature Flag and Rollout.io in a score-first ranking. It is listed as OSI-approved OSS under the MIT license.
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