Optimizely alternatives
12 other tools do this job. Which one is right depends on why Optimizely is not working for you — so start from the reason, not the list.
Why teams leave Optimizely
- Expensive, with a suite-oriented sales motion that pushes adjacent products.
- Client-side testing causes flicker and is increasingly blocked by browsers and blockers.
- Heavyweight for teams that only need a handful of experiments.
Worth saying: Optimizely is genuinely strong at this — the most capable visual editor for non-technical experiment authoring. If that is the part you rely on, switching may cost more than it saves.
If you need open source
Optimizely is proprietary; these are not.
GrowthBook
A/B & Flags
Open-source feature flags and experimentation that runs on your data warehouse.
Unleash
A/B & Flags
Open-source feature management with a privacy-first, self-hosted architecture.
Flagsmith
A/B & Flags
Open-source feature flags and remote config with straightforward self-hosting.
If it has to run on your own infrastructure
Optimizely is cloud-only; these can be self-hosted.
GrowthBook
A/B & Flags
Open-source feature flags and experimentation that runs on your data warehouse.
Unleash
A/B & Flags
Open-source feature management with a privacy-first, self-hosted architecture.
ConfigCat
A/B & Flags
Simple, cheap feature flags with unlimited team members on every plan.
Flagsmith
A/B & Flags
Open-source feature flags and remote config with straightforward self-hosting.
Everything else in A/B & Flags
Ranked by how widely adopted they are. Compare any two to see the differences that matter.
Experimentation plus heatmaps, replay and surveys in one conversion-optimisation suite.
European experimentation and personalisation platform with strong GDPR positioning.
Experimentation and personalisation with a strong hybrid client/server model.
Feature flags, experimentation and product analytics in one warehouse-friendly platform.
The enterprise feature-flag platform, with experimentation layered on top.
Open-source feature flags and experimentation that runs on your data warehouse.
Open-source feature management with a privacy-first, self-hosted architecture.
Simple, cheap feature flags with unlimited team members on every plan.
Open-source feature flags and remote config with straightforward self-hosting.
Privacy-focused A/B testing with unlimited experiments and no data selling.
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