OpenFeature vs GrowthBook
Both are alternatives to LaunchDarkly. Here's how they stack up — verified facts, no spin.
Also searched as GrowthBook vs OpenFeature — same comparison, one verdict.
OpenFeature
Not a platform — the standard that makes the platform swappable.
OpenFeature is a CNCF specification and set of SDKs defining a vendor-neutral API for evaluating feature flags. You write against OpenFeature, then plug in a provider — LaunchDarkly, Unleash, Flagsmith, GrowthBook, or a local file — and changing vendors becomes changing one line at startup instead of touching every call site. It stores nothing and manages nothing, so it is not an alternative in the usual sense. It is listed here because it is the highest-leverage thing on this page: adopt it and the rest of this decision becomes cheap to change your mind about. Apache-2.0 under the CNCF.
GrowthBook
Flags plus a real statistics engine — the experimentation answer.
GrowthBook is the option to look at when the reason you want flags is experiments rather than toggles. It runs A/B tests against your existing data warehouse — Snowflake, BigQuery, Redshift, Postgres — so the analysis happens where your data already lives instead of in a second copy, and it offers Bayesian and frequentist statistics rather than one opinionated method. Around 8.1k stars. The licence needs stating precisely: the core is MIT, but three enterprise directories are carved out under a separate commercial licence, so it is MIT-with-exceptions rather than plain MIT.
Side by side
| OpenFeature | GrowthBook | |
|---|---|---|
| Sovereignty Score | 97 | 83 |
| Open source | Yes | Yes |
| Self-hostable | Yes | Yes |
| Local-first | Yes | Yes |
| License | Apache-2.0 | MIT core, with enterprise directory carve-outs |
| Pricing | Free and open source. It is a specification and a set of SDKs. | Self-hostable core free. Cloud and enterprise tiers are paid. |
OpenFeature edges it on the Sovereignty Score, but the right pick depends on the trade-offs below.
OpenFeature
Strengths
- +Removes SDK lock-in entirely — swap providers in one line
- +CNCF-governed vendor-neutral standard with broad provider support
- +LaunchDarkly itself ships a provider, so adopting it costs you nothing today
- +Makes this whole comparison a reversible decision
Trade-offs
- −Not a flag platform — you still need something behind it
- −Thin abstraction: vendor-specific features may not be exposed
- −One more layer between your code and the evaluation
- −Provider maturity varies across the ecosystem
GrowthBook
Strengths
- +Genuine statistics engine — Bayesian and frequentist, not a toggle with a chart
- +Runs experiments against your existing warehouse, no data duplication
- +Warehouse-native means no second source of truth to reconcile
- +Self-hostable with a real free path
Trade-offs
- −Enterprise directories are carved out of the MIT licence
- −Heavier to set up than the pure flag tools — you need a warehouse
- −Flag management is less polished than Unleash's
- −Overkill if you only want to turn features on and off
Related alternative guides
Facts verified 2026-07-31. Licenses and pricing change — spotted something out of date? That's a correction we want.