Open-source alternative
Replace LaunchDarkly with Unleash / Flagsmith
The best open-source alternative to LaunchDarkly is Unleash or Flagsmith, self-hosted on Railway. Feature flags you host. Unleash and Flagsmith replace LaunchDarkly without the service-connection and MAU meter.
Estimated save $2,400 a year.
Open the stackStart on Railway
How LaunchDarkly compares
| LaunchDarkly | Unleash / Flagsmith | |
|---|---|---|
| Pricing model | Service connections + client-side MAU | Open-source or fair-code license; you pay the host |
| Hosting | Vendor cloud | Self-hosted on Railway or any VPS |
| Rough monthly cost | Foundation: $10/service connection/mo; $8.33 per 1,000 client-side MAU/mo source | Hosting only — no SaaS seat meter in this repo |
- Unleash
Open-source feature-management platform
- Flagsmith
Open-source flags, remote config, and experiments
FAQ
- Is it free?
- The Unleash / Flagsmith licenses are open source or fair-code. You still pay hosting (Railway or any VPS) and any APIs the stack calls. There is no LaunchDarkly seat or task bill on this path.
- Can I migrate from LaunchDarkly?
- Yes. Start with the workflows or data you actually use, then cut over. The Unleash / Flagsmith stack page has the agent prompt and the cost table; most teams rebuild the slice that matters and leave old LaunchDarkly links until they expire.
- How do I deploy it?
- Open the Unleash / Flagsmith stack, copy the agent prompt, and deploy on Railway (one service, PORT, and a volume when the app needs disk). Placeholder: Unleash or Flagsmith + Postgres. SDKs stay in the apps; this box is the control plane.
- What does this replace?
- LaunchDarkly. The published small-team estimate on this stack is $2,400 a year.
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