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Testing · head to head

GrowthBook vs Mautic

GrowthBook logo

GrowthBook

Testing

Open source feature flags and A/B testing that run experiment analysis inside your own data warehouse

From
Free
Rated
-
Full reviewWebsite
Mautic logo

Mautic

Marketing

The main open source marketing automation platform, self-hosted and GPL licensed

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: 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.; Mautic mautic depends on reliably scheduled cron jobs to process segments and send campaigns, and a misconfigured or silently failing schedule stops sends without an obvious error, which is the most common way Mautic deployments fail in production.
  • They diverge on capability: GrowthBook covers Feature flags, Mautic covers Visual campaign builder.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which GrowthBook and Mautic actually diverge.

Attributes where GrowthBook and Mautic differ
AttributeGrowthBookMautic
Pricing modelPer user per monthOpen source, no licence fee
PlatformsWeb, Self-hosted, DockerWeb, Linux, Self-hosted, Docker
CategoryTestingMarketing

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 GrowthBook

  • Feature flags
  • Warehouse-native analysis
  • Reusable metric definitions
  • Bayesian and frequentist engines
  • CUPED variance reduction
  • Visual editor
  • Self-hosting
  • Guardrail metrics

Only in Mautic

  • Visual campaign builder
  • Contact management and segmentation
  • Landing pages and forms
  • Lead scoring
  • Dynamic web content
  • Email builder and A/B testing
  • Self-hosted data control
  • No feature gating

What people use each for

The jobs each tool is most often brought in to do.

GrowthBook

  • An engineering team that wants feature flags without a per-monthly-active-user bill that grows with product successnot Mautic
  • A data team that needs experiment results to reconcile exactly with the metrics reported in its BI toolnot Mautic
  • A company with data residency or privacy constraints that cannot send user-level event data to a third-party vendornot Mautic
  • Running long-tail experiments where sequential testing and CUPED shorten the time to a decision on low-traffic surfacesnot Mautic

Mautic

  • A marketing agency running automation for many clients that cannot pass on per-contact SaaS pricing at scalenot GrowthBook
  • A European university or public body whose data protection position requires contact data to stay on infrastructure it controlsnot GrowthBook
  • A company with a list of several hundred thousand contacts where SaaS per-contact pricing has become the largest line in the marketing budgetnot GrowthBook
  • A team that needs to modify the automation logic itself, not just configure it, and wants source access to do sonot GrowthBook

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

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.

Mautic

  • Mautic depends on reliably scheduled cron jobs to process segments and send campaigns, and a misconfigured or silently failing schedule stops sends without an obvious error, which is the most common way Mautic deployments fail in production.
  • Email sending is not included: you must arrange, pay for and warm up your own sending infrastructure through Amazon SES, SendGrid or similar, and deliverability problems become entirely your problem with no vendor to escalate to.
  • Acquia owns the commercial descendant, Campaign Studio, and is the largest contributor, so the loudest commercial interest in the ecosystem benefits from a hosted product rather than from the self-hosted one being easy.
  • Upgrades between major versions have historically been disruptive, requiring database migrations and plugin compatibility checks, so a neglected instance can become expensive to bring current.
  • The interface and the reporting are noticeably behind commercial platforms, so marketing teams that came from HubSpot or ActiveCampaign will find everyday tasks slower and will need training.

Pricing, plan by plan

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

Mautic

Free
  • Self-hosted communityFree
    • GPL licensed, no licence fee and no contact limits
    • All features included, no paid edition
    • You provide hosting, database, cron scheduling and email sending
  • Managed Mautic hosting$undefined/month
    • Third-party managed hosting listed by the project
    • Updates, backups and cron scheduling handled for you
    • Pricing varies by provider and is not set by the project

Which should you pick?

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.
GrowthBook review

Choose Mautic if

  • You need visual campaign builder.
  • You want to start without paying.
  • You work on Web, Linux, Self-hosted, Docker.
  • You also want contact management and segmentation.
Mautic review

Questions people ask

Is GrowthBook or Mautic better?
Neither clearly leads. GrowthBook starts at Free and Mautic at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, GrowthBook or Mautic?
GrowthBook starts at Free and Mautic at Free.
Does GrowthBook or Mautic run on more platforms?
GrowthBook runs on Web, Self-hosted, Docker. Mautic runs on Web, Linux, Self-hosted, Docker.
Can I use GrowthBook for free?
Both have a free tier, so you can try either at no cost before committing.
What is GrowthBook best used for?
GrowthBook is most often used for an engineering team that wants feature flags without a per-monthly-active-user bill that grows with product success, a data team that needs experiment results to reconcile exactly with the metrics reported in its bi tool, a company with data residency or privacy constraints that cannot send user-level event data to a third-party vendor, running long-tail experiments where sequential testing and cuped shorten the time to a decision on low-traffic surfaces. Of those, an engineering team that wants feature flags without a per-monthly-active-user bill that grows with product success and a data team that needs experiment results to reconcile exactly with the metrics reported in its bi tool are not what Mautic is typically brought in for.
What can GrowthBook do that Mautic cannot?
GrowthBook covers Feature flags, Warehouse-native analysis, Reusable metric definitions, Bayesian and frequentist engines. Mautic covers Visual campaign builder, Contact management and segmentation, Landing pages and forms, Lead scoring.

Answered from the vendors’ own pages

GrowthBook: 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.

Mautic: Is Mautic free?

Yes, GPL licensed with no licence fee and no contact limits. You pay for hosting, email sending and the staff time to maintain it.

GrowthBook: 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.

Mautic: Does Acquia own Mautic?

Acquia acquired the founding commercial entity in 2019 and sells Campaign Studio built on it, but the Mautic trademark sits with the Open Source Collective and the project is community governed.

GrowthBook: 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.

Mautic: What breaks most often?

Cron scheduling. If segment rebuilding and campaign triggers are not running on schedule, campaigns quietly stop sending with no alert.

GrowthBook: 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.

Mautic: Can it handle large contact lists?

Yes, but performance at several hundred thousand contacts depends on database tuning and queue configuration, which is work you must do yourself.

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