Prefab vs GrowthBook: Which Should You Choose in 2026?
Choosing between Prefab and GrowthBook 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.
By Toolradar Team · Last updated February 28, 2026 · Methodology
Short on time? Here's the quick answer
We've tested both tools. Here's who should pick what:
Prefab
Developer Rocket Fuel for Feature Flags, Dynamic Logging, and Secret Management.
Best for you if:
- • You need a/b testing features specifically
- • Manages feature flags, dynamic logging, and secrets from a single platform.
- • Offers developer-focused tools like CLI and editor plugins for real-time control and visibility.
GrowthBook
Open-source feature flags and A/B testing
Best for you if:
- • You want the higher-rated option (8.2/10 vs 0.0/10)
- • You need product analytics features specifically
- • Open-source feature flags
- • Self-host for full control
| At a Glance |  Prefab |  GrowthBook |
|---|---|---|
Price | Free + Paid | Free + Paid |
Best For | A/B Testing | Product Analytics |
Rating | —/100 | 82/100 |
| Feature | Prefab | GrowthBook |
|---|---|---|
| Pricing Model | Freemium | Freemium |
| Editorial Score | — | 82 |
| Community Rating | No ratings yet | No ratings yet |
| Total Reviews | 0 | 0 |
| Community Upvotes | 0 | 0 |
| Categories | A/B TestingLog Management | Product AnalyticsA/B Testing |
How Prefab and GrowthBook Compare
Prefab
Developer Rocket Fuel for Feature Flags, Dynamic Logging, and Secret Management.
Free tier available
GrowthBook
Open-source feature flags and A/B testing
Free tier available · 82/100 score
Prefab is a a/b testing tool. GrowthBook is in product analytics.
Who Should Use What?
On a budget?
Both are freemium. Compare plans on their websites.
Go with: Prefab
Want the highest-rated option?
GrowthBook scores 82/100. Prefab is unrated.
Go with: GrowthBook
Value user reviews?
Neither has user reviews yet.
Go with: GrowthBook
3 Questions to Help You Decide
What's your budget?
Both are freemium. Pricing won't help you decide here.
What's your use case?
Prefab is a a/b testing tool. GrowthBook is in product analytics. Pick the category that matches your needs.
How important are ratings?
Not all tools have been rated yet.
Key Takeaways
GrowthBook
- Higher score: 82/100 vs unrated
- Free tier available
- Our pick for this comparison
Prefab
- Better fit for a/b testing
The Bottom Line
GrowthBook (82/100) is our pick.
Frequently Asked Questions
Is Prefab or GrowthBook better?
GrowthBook scores 82/100 in our evaluation. Both are freemium.
What are Prefab and GrowthBook used for?
Prefab: Developer Rocket Fuel for Feature Flags, Dynamic Logging, and Secret Management.. GrowthBook: Open-source feature flags and A/B testing.
What does Prefab cost vs GrowthBook?
Prefab is freemium (free tier + paid plans). GrowthBook is freemium (free tier + paid plans). Visit their websites for detailed pricing.