Optimizely vs Statsig
Both are in A/B testing. Here is how their plans, prices and features compare, taken from each vendor's own site.
The main differences
- Fees: Optimizely Custom, request a demo; Statsig 5M events included, then $0.05 per 1,000, Custom; event or experiment based contracts.
| Optimizely | Statsig | |
|---|---|---|
| Starting price | Not verified yet | Free plan · from $150/mo |
| Free plan | Not stated by the vendor | Yes |
| Free trial | Not stated by the vendor | Not stated by the vendor |
| Plans | Agentic Experimentation () | Developer ($0); Pro ($150/mo); Enterprise () |
| Fees | Custom, request a demo | 5M events included, then $0.05 per 1,000; Custom; event or experiment based contracts |
| Best for | Not stated | Not stated |
| Key features | A/B, multi-page, feature and server-side testing; Proprietary Stats Engine; Real-time personalization and audience targeting; Warehouse-native analytics | A/B tests and experimentation, Bayesian and frequentist; Feature flags and dynamic configs; Product and web analytics; Session replays |
| Checked on | 2026-10-01 | 2026-10-03 |
Prices change; confirm on the vendor's site before you buy. Full details and sources are on each tool's page.
Optimizely
- Covers web, feature and server-side experimentation in one product
- Warehouse-native analytics
- Part of a wider content and commerce platform
Trade-offs
- No public pricing; plans are packaged individually through a sales conversation
- Built for larger teams rather than small sites
- No free trial listed
Statsig
- Free Developer plan: 2M events a month and unlimited seats
- Unlimited flag and config checks on every plan
- Experimentation, flags, analytics and replays in one tool
Trade-offs
- Developer keeps analytics for 1 year and replays at 50,000 a month
- Pro is $150 a month with extra events at $0.05 per 1,000 after 5M
- SSO, HIPAA eligibility and warehouse native need Enterprise