Open source alternatives to LaunchDarkly

2 projects on starwire do the same job. Ranked by how much of what LaunchDarkly does each one covers, read from its README and website. Ties go to the most active.

What LaunchDarkly does

  1. Feature flagscore
  2. Gradual rollouts and targetingcore
  3. A/B experiments
  4. Kill switches
  5. SDKs for many languages
  6. Audit log
  7. Approvals

Each dot in the table is one job, in this order. Square dots are core jobs and count double. Full means yes, half means partly. "See the evidence" under a project shows the line behind each one. Coverage is what a project documents, not how well it works or how hard it is to move to. How we score this

ProjectCoversStarsCommits, 12 weeksLast releaseClosed vs openedSetupLicense
unleashFeature flag and feature management platform Replaces it94%14k+100
831
 16 days ago93% Hosted version AGPL-3.0
Covers all 2 core jobs. Partly: Approvals.See the evidence
  • Feature flagscoreYesFeature flags in Unleash let you test your code
  • Gradual rollouts and targetingcoreYesCanary releases / gradual rollouts
  • A/B experimentsYesA/B testing
  • Kill switchesYesKill switches
  • SDKs for many languagesYes15 official client and server SDKs
  • Audit logYesAudit logs
  • ApprovalsPartlyrole-based access control, change requests
growthbookFeature flags, A/B testing and product analytics platform Replaces it72%8.6k+21
651
 11 days ago100% Hosted, free plan Custom license
Covers all 2 core jobs. Partly: Kill switches. Not shown: Audit log; Approvals.See the evidence
  • Feature flagscoreYesFeature flags with advanced targeting, gradual rollouts, and experiments
  • Gradual rollouts and targetingcoreYesFeature flags with advanced targeting, gradual rollouts, and experiments
  • A/B experimentsYesWorld class experiment stats engine
  • Kill switchesPartlyauto-rollbacks and ramp schedules with guardrails
  • SDKs for many languagesYes24 SDKs including React, Python, Android, and iOS.
  • Audit logNot shownNeither the README nor the website mentions it.
  • ApprovalsNot shownNeither the README nor the website mentions it.

Vital signs from GitHub, checked weekly. How we read these · How setup is read

These also replace

Optimizely1

All repos

New repos every two days, stars refreshed daily. Visits are counted without cookies, and the numbers are public. How it works Data RSS Newsletter

The best new open source, once a weekOne short email: the repo everyone is suddenly starring, a handful worth trying, and one hidden gem, each with a plain note on what it does. Free, with no tracking pixels.

Read past issues

↑ ↓ to move   Enter to choose   Esc to close
Follow starwire by RSSCopy an address into your feed reader.
The day's bestOne item a day: the repos rising fastest and the biggest new picks.starwire.foo/top.xml
Every new pickAll of them as they are added, up to 60 a day.starwire.foo/feed.xml
The weekly emailEach issue of the newsletter, once a week.list.starwire.foo/archive.xml