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Teams wanting open-source experimentation
DIY setup for self-hosted
Typical cost: Free
Teams wanting open-source experimentation
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GrowthBook is an open-source A/B testing platform. Feature flags, experiments, and Bayesian statistics with self-hosted or cloud options.

PostHog
FreemiumProduct analytics, session recording, feature flags, and A/B testing.
Best for: Developer-first teams who want full product insights without vendor lock-in

Hotjar
FreemiumUnderstand how users behave on your site.
Best for: Non-technical teams focused on UX optimization and qualitative user feedback

Mailchimp
FreemiumAll-in-one Marketing Platform for small business.
Best for: Small businesses needing an all-in-one marketing platform with proven track record

HubSpot
FreemiumFree CRM with powerful marketing, sales, and service tools.
Best for: Startups wanting a full-featured free CRM that can scale with marketing and sales tools
Not sure if GrowthBook is right for you? Our decision guide covers key criteria, questions to ask yourself, and helps you pick the best option for your startup.
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User interface (UI) refers to the visual elements users interact with in a product—buttons, icons, t...
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Strong dev-tools solution. Teams wanting open-source experimentation.
Reviewed Dec 2025 by our editorial team
Includes: Unlimited on self-hosted
Note: Cloud has usage limits