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Home/Categories/Product & Project Management/GrowthBook
icon of GrowthBook

GrowthBook

Open source alternative to LaunchDarkly, Optimizely and Statsig

An open-source feature flag and A/B testing platform for releasing code better and measuring impact with your own data.

7.8K starsTypeScriptActive this month
Visit websiteGitHub repo
image of GrowthBook
Contents
  1. 01Who GrowthBook is for
  2. 02The problem it solves
  3. 03How it solves it
  4. 04Strengths and trade-offs
  5. 05GrowthBook vs alternatives
  6. 06Install and self-host
  7. 07Tech stack
  8. 08FAQ
  9. 09Similar open-source tools
TL;DR

GrowthBook is an open-core feature flag, experimentation, and product analytics tool for teams that want LaunchDarkly-style rollout control with warehouse-native measurement. It supports feature flags, 24 SDKs, advanced experiment statistics, 11 data sources, webhooks, REST API, and self-hosting. Best for product and engineering teams that want experimentation connected to their own data warehouse.TypeScript · 7.8K stars · Active this month

who it's for

Who GrowthBook is for#

Product teams running A/B tests from warehouse data

GrowthBook lets teams define metrics against their existing data warehouse and connect those results to feature flag rollouts.

Skip if:

Skip it if your team has no event pipeline or wants a fully managed analytics suite with minimal SQL involvement.

Engineering teams replacing managed feature flags

Teams can self-host flag infrastructure, use SDKs across services, and automate workflows through APIs and webhooks.

Skip if:

Choose a managed flag vendor if uptime responsibility and SDK support should sit fully with an external provider.

the problem

The problem it solves#

Feature delivery and experimentation often split across multiple paid tools: one for flags, one for A/B tests, one for analytics, and another for data warehouse analysis. That fragmentation makes it harder to connect releases to product impact, and per-seat or event-based pricing can punish teams as usage grows.

Teams with strong data infrastructure also need experimentation logic that respects their metric definitions. If metrics live in a warehouse, exporting data into a vendor dashboard creates governance and accuracy problems.

how GrowthBook solves it

How it solves it#

Feature flags with targeting

GrowthBook supports advanced targeting, gradual rollouts, and experiments, so teams can release changes to segments before full production exposure.

24 SDKs

The README lists 24 SDKs, including React, Python, Android, and iOS, which helps teams run consistent flags across web, backend, and mobile surfaces.

Warehouse-native experiments

GrowthBook queries 11 data sources, including BigQuery, Snowflake, Databricks, Redshift, and ClickHouse, so experiment analysis can use existing warehouse data.

Advanced statistics engine

GrowthBook documents CUPED, sequential testing, Bayesian methods, post-stratification, bandits, and SRM checks for teams that need more than basic conversion-rate comparisons.

Product analytics and API access

Built-in analytics, webhooks, and a REST API let teams build dashboards and automate flag workflows around the same experimentation data.

strengths · trade-offs

Strengths and trade-offs#

Strengths

  • Flags and experiments in one workflowGrowthBook connects rollout control to measurement, so product teams can test a feature and analyze impact without moving between unrelated vendors.
  • Works with existing warehousesWarehouse-native analysis is a strong fit for teams that already govern metrics in BigQuery, Snowflake, Redshift, Databricks, or ClickHouse.
  • Self-hosting path is documentedThe README gives a Docker Compose quick start, which makes local evaluation and self-hosted deployment easier to validate than API-only experimentation tools.

Trade-offs

  • -Open-core licensingGrowthBook says the bulk of the code is MIT licensed, but some directories use a separate commercial enterprise license. Teams need to check whether required features sit in the open or enterprise tier.
  • -Data warehouse setup affects valueGrowthBook is strongest when metrics already live in a supported data source. Teams without clean event tracking or SQL-owned metrics will need data work before experiments are useful.
versus alternatives

GrowthBook vs alternatives#

GrowthBook vs LaunchDarkly

GrowthBook and LaunchDarkly both support feature flags and controlled rollouts, but GrowthBook adds warehouse-native experimentation and a self-hosted path. LaunchDarkly is a managed proprietary feature management service with a mature hosted operations model.

GrowthBook is the better fit when a team wants feature flags tied to its own warehouse metrics and wants the option to self-host. LaunchDarkly is still the safer choice when the organization prioritizes vendor-managed reliability, enterprise support, and a fully hosted flag service over data ownership.

install · self-host

Install and self-host#

bash
git clone https://github.com/growthbook/growthbook.git
cd growthbook
docker compose up -d
tech stack · detected from GitHub

What it's built on#

Languages
PythonTypeScript
Frameworks
ExpressNext.jsReact
Databases
MongoDBMySQLPostgreSQL
Infrastructure
AWS
frequently asked

FAQ#

Can GrowthBook be self-hosted?

Yes. The README includes a Docker Compose quick start and links to full self-hosting instructions.

Does GrowthBook only do feature flags?

No. GrowthBook combines feature flags, experimentation, product analytics, metric definitions, APIs, and warehouse-native analysis.

What is GrowthBook's license model?

GrowthBook is open core. The project states that most code is MIT licensed, with separate commercial licensing for some enterprise directories.

also worth a look

Similar open-source tools#

OpenFlags

OpenFlags

Self-hosted feature flags for JavaScript with zero dependencies

17TypeScriptMIT
Flipt

Flipt

Feature flags that store and evaluate on your own infrastructure

4.8KGoMIT
Flagsmith

Flagsmith

Open source feature flags and remote config, self-hosted

6.4KPythonBSD-3-Clause
Unleash

Unleash

LaunchDarkly alternative with SDK for 30+ languages, self-hosted

13.5KTypeScriptAGPL-3.0
CocoIndex

CocoIndex

Incremental data framework for AI agents.

9.7KPythonApache-2.0
OpenObserve

OpenObserve

Self-hosted observability for logs, metrics, and traces

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Repository

Stars
7.8K
Forks
750
Latest
v4.3.0
Last commit
8 days ago
Last verified
May 25, 2026
Repo
growthbook/growthbook ↗

Additional details

Language
TypeScript
Open issues
835
Contributors
130
First release
2021

Categories

Product & Project ManagementData & AnalyticsDevOps & CI/CD

Tags

Feature FlagA/B TestingWeb AnalyticsData VisualizationDeveloper ToolsDevOps ToolsOpen CoreSelf Hosted