vs Comparison
Trevo vs Optimizely
Optimizely provides mature web and feature-experimentation infrastructure. Trevo starts from a different constraint: the experiment has not been designed or coded yet.
Reviewed September 2, 2026 · Optimizely Feature Experimentation documentation
Trevo or Optimizely — which should you choose?
Choose Optimizely when you want a enterprise experimentation suite and have a team ready to implement the variants. Choose Trevo when implementation is the constraint: Trevo starts where the backlog starts: it reads your connected repo, proposes experiments grounded in files that exist, writes the variant as a pull request you review, and opens a cleanup PR when the result is in. Server-side changes rank above surface tweaks, assignment resolves in your own code from a synced snapshot, and the winning diff is simply merged.
What Optimizely does well
Optimizely spans a visual web editor for marketer-driven tests and Feature Experimentation SDKs for engineer-built ones, with its Stats Engine for sequential analysis and the governance features large programs need. It is sales-led and priced for enterprises, and it works: big teams run big programs on it.
Where Optimizely stops
Optimizely can run client- and server-side tests, but your team still authors the hypothesis and implements code-level variants behind its flags. That distinction matters when engineering capacity, rather than assignment or analysis, is the bottleneck.
What Trevo does differently
Trevo starts where the backlog starts: it reads your connected repo, proposes experiments grounded in files that exist, writes the variant as a pull request you review, and opens a cleanup PR when the result is in. Server-side changes rank above surface tweaks, assignment resolves in your own code from a synced snapshot, and the winning diff is simply merged.
At a glance
| Trevo | Optimizely | |
|---|---|---|
| Who finds the opportunity | Trevo, from a scan of your repo and site | Your team ideates and prioritizes |
| Who writes the variant | Trevo — every experiment arrives as a pull request on a trevo/* branch | Marketers in the visual editor; engineers for everything else |
| What can change | Any code path — pricing, handlers, prompts, and the front end | DOM via snippet, or whatever your engineers build behind flags |
| Where winners end up | Merged into your repo like any other change | Behind platform flags until rebuilt |
| Losing variants | Removed by an automatic cleanup PR | Manual teardown |
| Statistics | mSPRT, always-valid — peek anytime | Stats Engine (sequential) |
Choose Optimizely if
- –You run a large experimentation program that needs enterprise governance, roles, and process across many teams.
- –Marketers must launch DOM-level tests themselves in a visual editor.
Choose Trevo if
- ✓The bottleneck is engineering time, not ideas — you want the variant written for you, as a reviewable PR.
- ✓The tests that matter are in server code: pricing, API behavior, prompts, ranking.
- ✓You want winners merged into the repo and losers cleaned up automatically, not accumulating in a vendor dashboard.
Frequently asked questions
Is Trevo an Optimizely alternative?
For teams whose constraint is engineering time, yes. Optimizely provides the platform and your team does the experimenting; Trevo proposes the experiments, writes each variant as a pull request in your repo, measures it with always-valid statistics, and cleans up after the result.
Can Trevo test things a visual editor cannot?
Yes. Because variants are code in your repository, Trevo can test pricing logic, API handlers, prompts, and ranking — code paths a DOM editor never reaches — as well as ordinary front-end changes.
Does Trevo deploy code to production by itself?
No. Trevo writes to trevo/* branches and opens pull requests. Your team reviews and merges; nothing ships without your approval.
Explore Trevo: for growth teams · for startups · pricing experiments · onboarding experiments · PostHog integration · GitHub integration
More comparisons: Trevo vs VWO · Trevo vs AB Tasty · Trevo vs Coframe · Trevo vs Statsig · Trevo vs GrowthBook · Trevo vs Eppo · Trevo vs LaunchDarkly
See what Trevo would test on your stack.
Connect the repo and Trevo proposes experiments grounded in what it read. Or preview the ideas on your domain first — the scan is free and cites its sources.