Marketing · head to head
Convert vs GrowthBook
GrowthBook
Testing
Open source feature flags and A/B testing that run experiment analysis inside your own data warehouse
- From
- Free
- Rated
- -
The short version
- Each has a real cost: Convert pricing is driven by monthly tested users, starting at $399 per month for 100,000 monthly tested users on Growth and $599 on Pro; GrowthBook warehouse-native analysis is only an advantage if you have a warehouse with clean event data in it; without one, GrowthBook has nothing to compute against and you are back to buying an event-collecting platform.
- They diverge on capability: Convert covers A/B testing, GrowthBook covers Feature flags.
- Prices and features above were last checked on 2 September 2026.
Where they differ
Only the attributes on which Convert and GrowthBook actually diverge.
| Attribute | Convert | GrowthBook |
|---|---|---|
| Pricing model | subscription | Per user per month |
| Platforms | Web | Web, Self-hosted, Docker |
| Category | Marketing | Testing |
| Founded | 2012 | Unknown |
Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated).
What each one covers
Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.
Only in Convert
- A/B testing
- Multivariate testing
- Analytics
- API access
- Google Analytics
- SSL encryption
- Cloud deployment
- Web support
Only in GrowthBook
- Feature flags
- Warehouse-native analysis
- Reusable metric definitions
- Bayesian and frequentist engines
- CUPED variance reduction
- Visual editor
- Self-hosting
- Guardrail metrics
What people use each for
The jobs each tool is most often brought in to do.
Convert
- A/B and multivariate testing for conversion optimizationnot GrowthBook
- Full-stack experimentation on web and mobilenot GrowthBook
- Sequential testing and statistical confidence trackingnot GrowthBook
GrowthBook
- An engineering team that wants feature flags without a per-monthly-active-user bill that grows with product successnot Convert
- A data team that needs experiment results to reconcile exactly with the metrics reported in its BI toolnot Convert
- A company with data residency or privacy constraints that cannot send user-level event data to a third-party vendornot Convert
- Running long-tail experiments where sequential testing and CUPED shorten the time to a decision on low-traffic surfacesnot Convert
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
Convert
- Pricing is driven by monthly tested users, starting at $399 per month for 100,000 monthly tested users on Growth and $599 on Pro
- Single Sign-On requires the Pro plan at $599 per month
- Multivariate testing, multi-page testing, full stack and feature flags, sequential testing and raw test data export are all withheld from the Growth plan
- Phone support, change history and guided onboarding require Pro
- The advertised $299 and $420 per month rates require paying the full year up front at $3,588 or $5,040
- The Enterprise plan is price on request, is only available as an annual plan, and its data segregation feature carries additional costs
- Listed prices exclude VAT, GST and other taxes, which are added at checkout
- Above 5 million monthly tested users there is no published rate
GrowthBook
- Warehouse-native analysis is only an advantage if you have a warehouse with clean event data in it; without one, GrowthBook has nothing to compute against and you are back to buying an event-collecting platform.
- Metrics are SQL, so a marketing or product team without data engineering support cannot define or fix them, and a badly written metric silently produces a confident wrong answer.
- Cloud Pro bills per seat and then adds CDN request and bandwidth overages, so a high-traffic site can find the variable component exceeds the seat cost it budgeted for.
- Self-hosting means you own the Mongo database, the SDK endpoint availability and the upgrade path, and a flag service that is down is a production incident, not an analytics inconvenience.
- The statistics engine exposes real choices, Bayesian versus frequentist, sequential testing, variance reduction, and the tool will not stop a team that configures them wrongly, so it rewards statistical literacy and punishes its absence.
Pricing, plan by plan
Convert
Free- Growth$399/month
- Pro$599/month
- Enterprise$undefined/mo
GrowthBook
Free- Open source (self-hosted)Free
- Unlimited users, feature flags and experiments
- One project
- MIT licensed, you run the infrastructure
- Starter (cloud)Free
- Up to 3 users
- 1 project
- Unlimited flags, experiments and traffic
- Pro (cloud)$40/month
- Per seat, up to 50 users
- 3 projects
- CDN overage at $10 per million requests beyond the included allowance
- Enterprise$undefined/year
- Unlimited users and projects
- SSO, audit logs and advanced permissions
- Available on cloud or self-hosted
Which should you pick?
Choose Convert if
- You need a/b testing.
- You want to start without paying.
- You also want multivariate testing.
Choose GrowthBook if
- You need feature flags.
- You want to start without paying.
- You work on Web, Self-hosted, Docker.
- You also want warehouse-native analysis.
Questions people ask
- Is Convert or GrowthBook better?
- Neither clearly leads. Convert starts at Free and GrowthBook at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Convert or GrowthBook?
- Convert starts at Free and GrowthBook at Free.
- Does Convert or GrowthBook run on more platforms?
- Convert runs on Web. GrowthBook runs on Web, Self-hosted, Docker.
- Can I use Convert for free?
- Both have a free tier, so you can try either at no cost before committing.
- What is Convert best used for?
- Convert is most often used for a/b and multivariate testing for conversion optimization, full-stack experimentation on web and mobile, sequential testing and statistical confidence tracking. Of those, a/b and multivariate testing for conversion optimization and full-stack experimentation on web and mobile are not what GrowthBook is typically brought in for.
- What can Convert do that GrowthBook cannot?
- Convert covers A/B testing, Multivariate testing, Analytics, API access. GrowthBook covers Feature flags, Warehouse-native analysis, Reusable metric definitions, Bayesian and frequentist engines.
Answered from the vendors’ own pages
Convert: What is the starting price for Convert?
The Growth plan starts at $399/month (or $299/month billed annually for 25% savings) with 100K monthly tested users, 5 projects, and 5 active experiences per project.
SourceGrowthBook: Is the self-hosted version actually usable, or crippled?
It is genuinely usable: unlimited users, flags and experiments on one project under an MIT licence. The paid tiers add multiple projects, SSO, audit logs and support.
Convert: What is the difference between Growth and Pro plans?
Both cap at 100K tested users/month, but Pro ($599/month or $420/month annual) adds 30 active projects (vs 5), unlimited experiences per project (vs 5), unlimited domains (vs 10), multivariate testing, full-stack testing, sequential testing, and phone support.
SourceGrowthBook: Do I need a data warehouse?
For experiment analysis, effectively yes. Feature flagging works without one, but the reason to choose GrowthBook over a flag-only tool is the warehouse-native statistics.
Convert: How much does the Enterprise plan cost?
Enterprise pricing is available 'on request.' It supports 1M+ monthly tested users (12M+ annually), unlimited projects, experiences, and domains, plus dedicated account manager and custom terms.
SourceGrowthBook: How does the cost compare with LaunchDarkly or Optimizely?
GrowthBook charges per seat rather than per monthly active user or per tracked event, so cost stops scaling with traffic. At high volume that difference is large.
Convert: What is the cost to exceed my monthly tested user limit?
Growth overages cost $399 per 100K additional users. Pro/Enterprise overages cost $699 per 250K additional users. Customers can also upgrade mid-cycle at any time.
SourceGrowthBook: Does it support mobile and server-side flags?
Yes, there are SDKs across JavaScript, React, Python, Go, Ruby, PHP, Java, Kotlin, Swift and more, covering client, server and mobile evaluation.
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