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Head to head · Analytics experiments · October 2026 research run

GrowthBook vs Statsig

Statsig scores 72.3 (BB) on agent readiness against GrowthBook's 70.1 (BB), and leads in 3 of 7 scored categories. GrowthBook leads on reliability, agent ergonomics and maintenance & community. Both do analytics experiments.

GrowthBookGrowthBook, Inc. · HTTP API BB70.1/100#142 of 722 StatsigAmplitude, Inc. · HTTP API BB72.3/100#94 of 722

Which one, for what

GrowthBook BB

Good for Teams that want flags and experiments analysed against their own warehouse, with an open-source core and a self-hosted option.

Ahead on

  • Reliability, 86 against 79
  • Agent ergonomics, 76 against 71
  • Maintenance & community, 89 against 81

Also in its favour

  • Runs on your own machine
  • Open source

Watch for

The API tools take a path and a JSON string and don't validate payloads, so correct calls depend on the bundled skills

Statsig BB

Good for An agent that creates, updates and cleans up feature gates, dynamic configs and experiments, and reads experiment results and audit history.

Ahead on

  • Schema & documentation, 82 against 76
  • Security & auth, 74 against 68

Also in its favour

  • No incidents deducted, where GrowthBook loses 3 points for them

Watch for

Console API errors carry only status and message, and the spec documents no 429 response

Score by category

CategoryWeight this runGrowthBookStatsigEdge
Reliability16%208679GrowthBook +7
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.27682Statsig +6
Agent ergonomics13%16.27671GrowthBook +5
Security & auth14%17.56874Statsig +6
Payments & pricing10%12.54040even
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.88981GrowthBook +8
Transparency & trust7%8.87475Statsig +1
Negative events≤15-30
Total70.1 · BB72.3 · BB

Facts side by side

FactGrowthBookStatsig
KindHTTP APIHTTP API
VendorGrowthBook, Inc.Amplitude, Inc.
Hosted endpointhttps://mcp.growthbook.io/mcphttps://api.statsig.com/v3/mcp
TransportsHTTP, Streamable HTTP, stdioHTTP, Streamable HTTP
AuthOAuth or keyOAuth or key
PricingFreemiumFreemium
x402nono
LicenceMIT for the core and for the MCP server. Three enterprise directories in the main repository are under GrowthBook's enterprise licence. GrowthBook Cloud is a hosted service under the Customer AgreementProprietary hosted service under Statsig's self-service or enterprise terms. The SDKs and the agent skills repository on GitHub are ISC
Tools exposed418
Read-only variant documentednono
llms.txtyesyes
MCP registryio.github.growthbook/growthbook-mcpcom.statsig/statsig-mcp-server
Last release2026-10-062026-09-28
Terms last updated2025-06-192025-08-04
Privacy policy last updated2026-06-082026-08-31
Customer content may train modelsyesnot found in the text
Terms restrict automated accessnot found in the textnot found in the text
Terms restrict benchmarkingyesyes
Terms or service can change without noticenot found in the textyes
Arbitration or class-action waivernot found in the textyes
Popularity8.5k stars, 1.3M npm/wk, 433k PyPI/wk4.2M npm/wk, 894k PyPI/wk

Verdicts

GrowthBook

GrowthBook Cloud's MCP server has four tools with read and write annotations, OAuth with dynamic client registration, and a 414-operation OpenAPI spec behind it. The free plan needs no card. The API tools pass paths and JSON bodies through without validation, every key is limited to 60 requests a minute, and audit logs are Enterprise only.

Statsig

Statsig suits agents that manage feature gates and experiments and read their results. Its MCP server has 18 default tools, OAuth, read-only access by project and role, and a confirmation on updates. Errors carry only a status and a message, no idempotency keys were found, and the privacy notice is Amplitude's and doesn't name Statsig.

Before you call either

GrowthBook

  1. Connect to https://mcp.growthbook.io/mcp and complete OAuth in a browser. Use https://mcp.growthbook.io/mcp/api for the two API tools alone
  2. Call growthbook_list_skills and growthbook_read_skill before writing. The API tools don't validate payloads, so use the paths the skill names
  3. Stay under 60 requests a minute per key. On 429 wait for the RateLimit-Reset seconds before retrying
  4. List calls return 10 items by default. Pass limit up to 100 and offset to page
  5. A 422 is a soft warning. Resubmit with ?ignoreWarnings=true only after reading the message

Statsig

  1. Connect to https://api.statsig.com/v3/mcp. The official MCP registry entry still lists the V1 URL, which has 93 tools
  2. Call get_context first to learn the project, your permissions and the review settings
  3. Read the resource before gate_update, experiment_update or dynamic_config_update. They replace the whole resource, so resend every field you want kept
  4. Use discover_tools for partial edits, and fetch a fresh operationHandle when one expires
  5. On a 429 slow down and back off with jitter. Rejected attempts count towards the quota of about 1,800 mutations per 15 minutes

Questions

Which is better for AI agents, GrowthBook or Statsig?

Statsig scores 72.3 (BB) on agent readiness against GrowthBook's 70.1 (BB), and leads in 3 of 7 scored categories. GrowthBook leads on reliability, agent ergonomics and maintenance & community.

Do GrowthBook and Statsig need an API key?

Both take an API key or an OAuth sign-in.

Can an agent call GrowthBook and Statsig without installing anything?

Yes. GrowthBook has a hosted endpoint at https://mcp.growthbook.io/mcp and Statsig at https://api.statsig.com/v3/mcp.

Are GrowthBook and Statsig open source?

GrowthBook is open source (MIT for the core and for the MCP server. Three enterprise directories in the main repository are under GrowthBook's enterprise licence. GrowthBook Cloud is a hosted service under the Customer Agreement). No open-source release is listed for Statsig.

Other comparisons with GrowthBook or Statsig

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