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Best feature flag platform

3 models · updated 2026-06-29

The verdict

Statsig leads — All 3 models rank Statsig the top startup.

Combined ranking

  1. 1
    Statsig—12 pts
    GPT #2Claude #2Gemini #2· Strong experimentation velocity with modern product analytics.
  2. 2
    GrowthBook—4 pts
    GPT #5Claude —Gemini #3· Leading warehouse-native open-source platform giving complete control over data.
  3. 3
    PostHog—3 pts
    GPT —Claude #5Gemini #4· Developer-friendly all-in-one suite combining feature flags, analytics, and session replays.
  4. 4
    Harness—3 pts
    GPT #3Claude —Gemini —· Robust flags plus governance for engineering teams.
  5. 5
    Eppo—2 pts
    GPT #4Claude —Gemini —· Excellent warehouse-native experimentation with rigorous metrics.
  6. 6
    Split—2 pts
    GPT —Claude #4Gemini —· Strong feature flags with built-in impact measurement, now backed by Harness's delivery platform.
  7. 7
    Flagsmith—1 pts
    GPT —Claude —Gemini #5· Extremely flexible open-source option supporting simple self-hosting and private clouds.

Not ranked (incumbents): LaunchDarkly, Optimizely

By model

ChatGPT

  1. 1.LaunchDarkly
  2. 2.Statsig
  3. 3.Harness
  4. 4.Eppo
  5. 5.GrowthBook

Claude

  1. 1.LaunchDarkly
  2. 2.Statsig
  3. 3.Optimizely
  4. 4.Split
  5. 5.PostHog

Gemini

  1. 1.LaunchDarkly
  2. 2.Statsig
  3. 3.GrowthBook
  4. 4.PostHog
  5. 5.Flagsmith

Tracked by ModelsAgree · rank 1 = 5 pts … rank 5 = 1 pt · re-polled continuously