GrowthBook vs Optimizely: Which Should You Choose in 2026?
Choosing between GrowthBook and Optimizely comes down to understanding what each tool does best. This comparison breaks down the key differences so you can make an informed decision based on your specific needs, not marketing claims.
Short on time? Here's the quick answer
We've tested both tools. Here's who should pick what:
GrowthBook
Open-source feature flags and A/B testing
Best for you if:
- • You want to try before committing
Optimizely
Digital experience optimization platform
Best for you if:
- • You want the higher-rated option (8.8/10 vs 8.2/10)
| At a Glance | ||
|---|---|---|
Price | Free + Paid | Paid |
Best For | Analytics | Analytics |
Rating | 82/100 | 88/100 |
| Feature | GrowthBook | Optimizely |
|---|---|---|
| Pricing Model | Freemium | Paid |
| Editorial Score | 82 | 88 |
| Community Rating | No ratings yet | No ratings yet |
| Total Reviews | 0 | 0 |
| Community Upvotes | 0 | 0 |
| Categories | Analytics | Analytics |
Understanding the Differences
Both GrowthBook and Optimizely solve similar problems, but they approach them differently.GrowthBook positions itself as "open-source feature flags and a/b testing" while Optimizelyfocuses on "digital experience optimization platform". These differences matter depending on what you're trying to accomplish.
When to Choose GrowthBook
GrowthBook makes sense if you're looking for a budget-friendly option with a free tier solution.
When to Choose Optimizely
Optimizely is worth considering if you need a professional-grade tool. Scoring 88/100, it edges ahead in our evaluation.
Who Should Use What?
Bootstrapped or small team?
When every dollar counts, GrowthBook lets you get started without pulling out your credit card.
We'd pick: GrowthBook
Growing fast?
Your team doubled last quarter and you need tools that won't break when you add 50 more people. Optimizely is built for teams that are leveling up.
We'd pick: Optimizely
Enterprise with complex needs?
You need SSO, compliance certifications, and a support team that picks up the phone. Optimizely takes enterprise seriously.
We'd pick: Optimizely
Still not sure? Answer these 3 questions
How much can you spend?
Tight budget? Start free with GrowthBook, upgrade when you're ready.
Do you care what other users think?
Both have similar review counts. Read a few before you commit.
Expert opinion or crowd wisdom?
Our team rated Optimizely higher (88/100). But the community has upvoted Optimizely more (0 votes). Pick your source of truth.
Key Takeaways
What Optimizely Does Better
- Higher overall score (88/100)
- Our recommendation for most use cases
Consider GrowthBook If
- You want to start free and scale later
- Its specific features better match your workflow
- You prefer its interface or design approach
The Bottom Line
If we had to pick one, we'd go with Optimizely (88/100). But the honest answer is that "better" depends on your situation. Optimizely scores higher in our analysis, but GrowthBook might be the right choice if its specific strengths align with what you need most. Take advantage of free trials to test both before committing.
Frequently Asked Questions
Is GrowthBook or Optimizely better?
Based on our analysis, Optimizely scores higher with 88/100. GrowthBook isfreemium while Optimizely is paid. The best choice depends on your specific needs and budget. We recommend testing both with free trials if available.
Can I switch from GrowthBook to Optimizely easily?
Migration difficulty varies. Check if both tools support data export/import in compatible formats. Some tools offer migration assistance or have integration partners who can help with the transition.
Do GrowthBook and Optimizely offer free trials?
Most software in this category offers free trials or free tiers. GrowthBook is freemium with a free tier.Optimizely is paid with potential trial. Visit their websites for current trial offers.