GrowthBook vs Prefab: Pricing and Ratings Compared (2026)
Entry prices and free plans as read on each vendor's pricing page, and user ratings as published on review sites, for GrowthBook and Prefab side by side. This page compares data; it is not a hands-on review.
On the data: On the data below, GrowthBook leads on lower entry price. We do not name an overall winner for this pair.
Short on time? Here's the quick answer
Based on published vendor pricing and features and on public review data, here's who should pick what:
GrowthBook
Open-source feature flags and A/B testing
Best for you if:
- • You want warehouse-native approach means experiment data never leaves your infrastructure
Prefab
Developer Rocket Fuel for Feature Flags, Dynamic Logging, and Secret Management.
Best for you if:
- • You want developer-focused experience with powerful editor integrations
| At a Glance | GrowthBook | Prefab |
|---|---|---|
Starts at | Free plan, paid from $40/user/mo, billed monthly Pro (Cloud) plan | Free plan, paid from $99/mo, billed monthly Pro plan |
Category | Feature Flags A/B Testing | Feature Flags DevOps |
Rating | 4.6/5 G2 4.6 26 reviews | n/a |
Free plan | Yes | Yes |
Watch out for | n/a | Overage fees for exceeding request limits |
Choose GrowthBook or Prefab?
Choose GrowthBook if
- You want warehouse-native approach means experiment data never leaves your infrastructure
- You want generous free tier with unlimited flags, experiments, and traffic
- Budget matters ($40/user/mo, billed monthly vs $99/mo, billed monthly)
Choose Prefab if
- You want developer-focused experience with powerful editor integrations
- You want combines feature flags, dynamic logging, and secret management in one tool
In-Depth Analysis
GrowthBook
Open-source feature flags and A/B testing
GrowthBook offers a very generous Starter tier at $0/month for up to 3 users, making it highly accessible for small teams.
Strengths
- Pro: Warehouse-native approach means experiment data never leaves your infrastructure
- Pro: Generous free tier with unlimited flags, experiments, and traffic
- Pro: Open-source edition supports unlimited users at no cost
- Pro: Ultra-lightweight SDKs with local evaluation keep latency near zero
- Pro: Enterprise-grade statistics (CUPED, sequential, bandits) included in Pro plan
Weaknesses
- Con: Requires a data warehouse connection for experiment analysis, not plug-and-play
- Con: Free cloud plan limited to 3 users with no advanced statistics
- Con: Pro plan at $40/user/month can get expensive for large teams
- Con: Self-hosted deployment needs infrastructure expertise and ongoing maintenance
- Con: Visual editor and advanced testing features are only available on paid plans
Key features
Prefab
Developer Rocket Fuel for Feature Flags, Dynamic Logging, and Secret Management.
Prefab's pricing is quite generous, especially with its robust Free tier offering unlimited flags and users, and a substantial 1.5M requests.
Watch out
Overage fees for exceeding request limits
Strengths
- Pro: Developer-focused experience with powerful editor integrations.
- Pro: Combines feature flags, dynamic logging, and secret management in one tool.
- Pro: Real-time updates and observability into flag usage.
- Pro: Fair, usage-based pricing model.
- Pro: Robust enterprise features like audit logging and advanced permissions available at scale.
Weaknesses
- Con: AB Testing Analysis is not explicitly detailed as an in-tool feature.
- Con: Some advanced features like Business Support SLA and 2yr Audit Log Retention are only available on higher tiers.
Key features
Plans and prices: GrowthBook vs Prefab
| Tool | Plans and prices | Source |
|---|---|---|
| GrowthBook |
| growthbook.io/pricing read Oct 19, 2026 |
| Prefab |
| prefab.cloud/pricing read Oct 5, 2026 |
Prices as read on each vendor's own pricing page on the date shown. Plans are listed per tool and are not matched against the other tool's plans: a plan name or price in one column says nothing about the same row in the other. Details on GrowthBook pricing and Prefab pricing.
Key Takeaways
GrowthBook
- Lower entry price: $40/user/mo, billed monthly vs $99/mo, billed monthly
Prefab
- Choose if you want developer Rocket Fuel for Feature Flags, Dynamic Logging, and Secret Management
What the data shows
On the data below, GrowthBook leads on lower entry price. We do not name an overall winner for this pair.
- Only GrowthBook has a published user rating (4.6/5 from 26 reviews); Prefab has none we can show.
- GrowthBook has the lower entry price: $40/user/mo, billed monthly (Pro (Cloud)) against $99/mo, billed monthly (Pro) for Prefab.
- Both have a free plan.
Criteria: user rating (only above 20 reviews on both sides, gap of 0.2 or more), entry price (only on the same billing basis), free plan. How we rate
Frequently Asked Questions
How do GrowthBook and Prefab compare in 2026?
On the data below, GrowthBook leads on lower entry price. We do not name an overall winner for this pair. Only GrowthBook has a published user rating (4.6/5 from 26 reviews); Prefab has none we can show. GrowthBook has the lower entry price: $40/user/mo, billed monthly (Pro (Cloud)) against $99/mo, billed monthly (Pro) for Prefab. Both have a free plan.
What are GrowthBook and Prefab used for?
GrowthBook: Open-source feature flags and A/B testing. Prefab: Developer Rocket Fuel for Feature Flags, Dynamic Logging, and Secret Management.
What does GrowthBook cost vs Prefab?
GrowthBook's cheapest paid plan is Pro (Cloud) at $40/user/mo, billed monthly; it also has a free plan. Prefab's cheapest paid plan is Pro at $99/mo, billed monthly; it also has a free plan. Prices read on the vendors' pricing pages, latest check Oct 19, 2026.
What's the main difference between GrowthBook and Prefab?
GrowthBook's main strength: warehouse-native approach means experiment data never leaves your infrastructure. Prefab's main strength: developer-focused experience with powerful editor integrations.