Ship A/B tests at the speed of thought
Describe the change. Watch it happen. The AI-first visual editor for GrowthBook turns plain English into production-ready experiments. no CSS, no dev ticket, no flicker.
Trusted by 3,000+ companies worldwide
Effortless Experimentation
Install the Chrome Extension
Install the extension from the Chrome store
Log into GrowthBook
Log into your GrowthBook account (if you're not already)
Create Experiments
Open the extension and create experiments on your site!
AI-powered visual editor
Prompt-powered website changes
AI suggested improvements
Manual element editor
Image generation and manipulation
Preview and edit
Multi-language & dark mode!
Unlock your teams creativity
Prompt first UI
Simply describe any change you want to make. Ask for suggestions, rearange the page, or replace or generate new images all from a prompt interface.
Image Generation and Manpulation
Ask the AI to change images, or select any image (or background image) and ask for alternatives.
Manual WYSIWYG no-code editor
Click on any element and get a full set of styles and content to edit.
Full change list and complete Transparency
Any change can be previewed, the changes are shown in full as to how they will target your page. Simply view, edit, or delete. Preview, QA, and ship with confidence.
One warehouse-native platform for modern product development
Experimentation
Feature Flags
Product Analytics
“GrowthBook gave us a modern experimentation and release platform that actually fits how Dropbox works. We can run analytics directly on our data lake, roll features out safely in stages, and support teams across different stacks without duplicating data or tooling.”
“Being able to turn a feature on and off with a flip of a switch is fantastic... That’s so much easier than having to do a deploy or a roll-back.”
“People only see the wins, but there’s actually greater value in avoiding losses. We’ve stopped changes that could have cost millions.”
“GrowthBook has changed the way we think about experiments... It allowed us to uplevel our code, speed up decision-making, and focus on what we do best.”
“Experimentation showed what customers actually do rather than what we assume they’ll do.”
“We don’t need any code changes, we don’t need an app release. We just configure the new tests and launch right away.”
"We are always experimenting now. It’s a natural part of product development. This is due to GrowthBook and the ease of usage both in the UX and in the seamless integration with Snowflake/DWH."
"GrowthBook's results speak for themselves. Every time we do a test, we see benefits for our audiences and our partners. These posters are our one shot, and we wouldn't want to fly blind."
“GrowthBook lets us build experiments exactly how we want. The ability to target based on culture and geography, as granular as needed, is a major win for us.”
"GrowthBook's results speak for themselves. Every time we do a test, we see benefits for our audiences and our partners. These posters are our one shot, and we wouldn't want to fly blind."
"We are always experimenting now. It’s a natural part of product development. This is due to GrowthBook and the ease of usage both in the UX and in the seamless integration with Snowflake/DWH."
“GrowthBook gave us a modern experimentation and release platform that actually fits how Dropbox works. We can run analytics directly on our data lake, roll features out safely in stages, and support teams across different stacks without duplicating data or tooling.”
FAQs
GrowthBook is built agent-ready from the API up. Anything your team can do in the GrowthBook app, your agents can do through the MCP server or REST API. That includes creating and updating feature flags, managing revisions and approvals, configuring ramp schedules and targeting, setting up experiments from your org's templates, monitoring running experiments through the Decision Framework, querying product metrics and dashboards through MCP or REST, concluding experiments and shipping winners, and finding and archiving stale flags.
An agent-native platform exposes the same surface to agents that it exposes to humans, with the same permissions and audit trail behind both. GrowthBook does that through an open MCP server and REST API that connect to the same backend as the visual app. Your agents are not a side channel. They are first-class users of the platform.
Any AI tool that supports the Model Context Protocol works with the GrowthBook MCP server, including Claude Code, Cursor, VS Code, and Codex. For tools without MCP support, custom agents you build yourself, or any HTTP client, the REST API exposes the same functionality.
MCP (Model Context Protocol) is a standard that connects AI models with external software, databases, workflows, and tools. GrowthBook launched the first open-source production MCP server for experimentation and product development in early 2025. It brings feature flags and testing into AI development environments so engineering teams can measure what they ship without breaking flow.
The MCP server works with agentic clients that support the Model Context Protocol, like Claude Code, Cursor, VS Code, and Codex. The REST API works with any programmatic method, including scripts, CI jobs, internal tools, and custom agents you build yourself. Both hit the same backend with the same permissions, approval flows, and audit trail. Most teams use both: the MCP server lives in their editor, and the REST API powers their automation.
Yes, both the MCP server and the REST API work with self-hosted GrowthBook. Point your API key at your instance URL instead of api.growthbook.io, and the same code that runs in the cloud runs on your hardware. See the self-hosting guide.
GrowthBook applies the same controls to AI agents that it applies to your team: role-based permissions, scoped API keys, approval workflows, environment limits, and audit logs. Every agent action through GrowthBook's MCP server or REST API goes through these guardrails automatically, with no extra configuration.
GrowthBook takes privacy and security seriously. The GrowthBook MCP server runs locally on your machine. It connects only to your GrowthBook instance using your API key, with no telemetry and no third-party calls. The REST API works the same way. Your prompts and source code stay between you and the AI tool you connect, so review that tool's privacy policy separately.
Yes. A GrowthBook instance, cloud or self-hosted, is required before you connec either the MCP server or the REST API. Sign up free, then visit our MCP server docs for tool-specific setup instructions and API docs for the REST reference.
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