Optimizely alternatives
Killing Custom ($10k+/yr typical) (~$120/yr) — here are 2 verified escapes, honest trade-offs included.
the answer medium migration
GrowthBook · Free / self-host free ⭐ 8.2K stars Flags + A/B testing with a stats engine, self-hostable.
you stop paying Custom ($10k+/yr typical) → keep ~$120/yr
head-to-head
| Optimizely | GrowthBook | |
|---|---|---|
| price | Custom ($10k+/yr typical) | Free / self-host free |
| self-hostable | no | yes |
| license | proprietary | MIT |
| verified | — | 2026-08 |
| migration | — | medium effort |
free & open source (2)
Free / self-host free
Flags + A/B testing with a stats engine, self-hostable.
trade-offs: Stats setup needs care
github →Free / self-host free
Feature flags and experiments bundled into product analytics.
trade-offs: Experiment traffic requirements
github →faq
What is the best free alternative to Optimizely?
GrowthBook is the top free option — Flags + A/B testing with a stats engine, self-hostable.
How much can I save by switching from Optimizely?
Optimizely costs Custom ($10k+/yr typical), so switching to a free alternative saves roughly $120/year per seat.
Can Optimizely be self-hosted?
Yes — GrowthBook and PostHog (experiments) can be self-hosted for free.