{ "data": { "a": { "slug": "growthbook", "name": "GrowthBook", "vendor": "GrowthBook, Inc.", "vendorUrl": "https://www.growthbook.io", "kind": "http-api", "category": "product-analytics", "summary": "GrowthBook is an open-source platform for feature flags, experiments and product analytics, sold as GrowthBook Cloud or run self-hosted. Agents reach it through a REST API with a public OpenAPI spec and an official MCP server.", "url": "https://www.anchorterminal.com/tools/growthbook", "markdownUrl": "https://www.anchorterminal.com/tools/growthbook.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/growthbook.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/growthbook.json", "repo": "https://github.com/growthbook/growthbook", "license": "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", "transports": [ "http", "streamable-http", "stdio" ], "remoteUrl": "https://mcp.growthbook.io/mcp", "packages": [ { "registry": "npm", "name": "@growthbook/mcp" }, { "registry": "npm", "name": "@growthbook/growthbook" }, { "registry": "pypi", "name": "growthbook" } ], "auth": "mixed", "authNotes": "The hosted MCP server uses OAuth with PKCE, dynamic client registration, refresh tokens and a revocation endpoint, with api.growthbook.io as the authorisation server. A person signs in and consents in a browser. The only scopes are openid, profile, email and offline_access, so the token carries the user's own permissions. The REST API takes a Personal Access Token or a Secret Key as a Bearer token or as the HTTP Basic username. Both are self-serve in the app. A Secret Key can hold any built-in or custom role with per-project overrides and environment limits, and both key types can expire. On the Free plan members can only hold the Admin role.", "pricing": "freemium", "pricingNotes": "Starter is free with no card, for up to 3 users and 1 project, so an agent's owner can start without a contract. Pro is $40 a seat a month for up to 30 users. Enterprise is by contract. Flags, experiments and traffic are unlimited on every plan, and API and MCP calls are not billed. Pro meters CDN requests, CDN bandwidth and Managed Warehouse events above its allowance. Self-hosting the open-source edition is free (https://www.growthbook.io/pricing, checked 2026-10-08).", "priceSummary": "$40 / seat-mo", "where": "both", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the docs index, the OpenAPI spec, the MCP server source or the pricing page (checked 2026-10-08).", "endpoints": [] }, "toolCount": 4, "popularity": { "githubStars": 8484, "npmWeekly": 1290544, "pypiWeekly": 432892, "asOf": "2026-10-08" }, "docsUrl": "https://docs.growthbook.io", "llmsTxt": "https://docs.growthbook.io/llms.txt", "openapi": "https://api.growthbook.io/api/v1/openapi.yaml", "registryName": "io.github.growthbook/growthbook-mcp", "capabilities": [ "analytics.experiments", "analytics.flags", "analytics.query", "analytics.events" ], "tags": [ "official", "hosted", "open-source", "self-hosted", "mcp", "oauth", "openapi", "llms-txt", "free-tier", "no-card", "status-page", "soc2" ], "lastRelease": "2026-10-06", "graded": true, "anchor": { "graded": true, "score": 70.1, "grade": "BB", "agentReady": true, "rank": 142, "ranked": true, "rankOf": 722, "categoryRank": 2, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 76, "maintenance": 89, "payments": 40, "reliability": 86, "schema": 76, "security": 68, "transparency": 74 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-08" }, "negative": -3, "negativeNotes": [ "10 August 2026. MCP server 2.1.0 replaced `growthbook_call_api` with two tools in a minor version, eleven days after 2.0.0 removed every 1.x tool, while the docs tell users to install `@growthbook/mcp@latest`. Both are marked breaking in the changelog with migration steps, and we found no advance notice, so the deduction is the minimum (https://github.com/growthbook/growthbook-mcp/blob/main/CHANGELOG.md)." ], "verdict": "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.", "bestFor": "Teams that want flags and experiments analysed against their own warehouse, with an open-source core and a self-hosted option.", "strengths": [ "The MCP server has four tools, each with readOnlyHint and destructiveHint, and a second endpoint with only the two API tools", "OAuth with PKCE, dynamic client registration, refresh and revocation on GrowthBook Cloud, so no API key sits in the MCP config", "Public OpenAPI 3.1 spec with 306 paths and 414 operations, plus llms.txt and a Markdown copy of every docs page", "Starter plan is free with no card, with unlimited flags, experiments and traffic for up to 3 users", "MIT core with a self-hosted option, and the same MCP server published on npm and as a Docker image" ], "weaknesses": [ "The API tools take a path and a JSON string and don't validate payloads, so correct calls depend on the bundled skills", "API keys are limited to 60 requests a minute on Cloud, and no idempotency keys were found", "Audit logging is an Enterprise feature, and Free plan members can only hold the Admin role", "The Customer Agreement grants GrowthBook a right to use Customer Data to train its AI algorithms, and no opt-out was found", "MCP 2.0.0 and 2.1.0 replaced the whole tool surface in July and August 2026, the second in a minor version" ], "agentNotes": [ "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", "Call `growthbook_list_skills` and `growthbook_read_skill` before writing. The API tools don't validate payloads, so use the paths the skill names", "Stay under 60 requests a minute per key. On 429 wait for the `RateLimit-Reset` seconds before retrying", "List calls return 10 items by default. Pass `limit` up to 100 and `offset` to page", "A 422 is a soft warning. Resubmit with `?ignoreWarnings=true` only after reading the message" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 0, "avgRating": 0, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "BB", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 70.1 } ], "editorialScores": { "ergonomics": 76, "maintenance": 89, "payments": 40, "reliability": 86, "schema": 76, "security": 68, "transparency": 66 }, "provenanceScore": 81 }, "connect": { "install": "npx -y @growthbook/mcp@latest", "http": "curl https://api.growthbook.io/api/v1/features -H \"Authorization: Bearer secret_abc123DEF456\"", "claudeCode": "claude mcp add --transport http growthbook https://mcp.growthbook.io/mcp", "config": { "mcpServers": { "growthbook": { "url": "https://mcp.growthbook.io/mcp" } } } }, "letme": { "capability": "https://letme.dev/analytics.experiments", "tool": "https://letme.dev/growthbook" }, "area": "business", "unitPrices": [ { "item": "Pro plan seat", "unit": "seat-month", "usd": 40, "note": "Up to 30 users and 3 projects" }, { "item": "CDN requests", "unit": "1k-requests", "usd": 0.01, "note": "Pro plan, above 2 million a month ($10 per million)" }, { "item": "Managed Warehouse event", "unit": "tx", "usd": 0.00003, "note": "Pro plan, above 2 million a month ($30 per million)" }, { "item": "CDN bandwidth", "unit": "gb", "usd": 1, "note": "Pro plan, above 20 GB a month" } ], "provenance": { "legalEntity": "GrowthBook, Inc.", "domain": "growthbook.io", "domainRegistered": "2020-05-19", "endpointOnVendorDomain": true, "terms": "https://www.growthbook.io/legal/customer-agreement", "privacy": "https://www.growthbook.io/legal/privacy-notice", "statusPage": "https://status.growthbook.io", "changelog": "https://github.com/growthbook/growthbook/releases", "securityTxt": "none", "checked": "2026-10-08", "notes": [ "The Customer Agreement (effective 19 June 2025) is between the customer and GrowthBook, Inc., with notices to 1950 W Corporate Way #34560, Anaheim, CA 92801, under California law.", "The Privacy Notice (effective 8 June 2026) covers the website and related services and names GrowthBook, Inc. at the same address. The Customer Agreement refers to it for Customer Data.", "The MCP server answers at mcp.growthbook.io and the REST API at api.growthbook.io. OAuth metadata names https://api.growthbook.io as issuer.", "www.growthbook.io/.well-known/security.txt and growthbook.io/.well-known/security.txt return 404. Reports go to a form on the disclosure page or to security@growthbook.io.", "RDAP for growthbook.io gives a registration date of 2020-05-19.", "The MCP server keeps its own changelog at https://github.com/growthbook/growthbook-mcp/blob/main/CHANGELOG.md." ], "score": 81 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/growthbook.json", "live": { "slug": "growthbook", "probe": { "target": "https://mcp.growthbook.io/mcp", "method": "get", "lastAt": "2026-10-08T21:12:11.864716877Z", "lastOk": true, "lastStatus": 401, "lastMs": 257, "lastNote": "asks for credentials", "authRequired": true, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 257, "p95ms24h": 331, "samples24h": 41, "samples30d": 41, "days": [ { "date": "2026-10-08", "probes": 41, "ok": 41 } ] }, "vendorStatus": { "page": "https://status.growthbook.io", "indicator": "unknown", "summary": "no machine-readable status found", "checkedAt": "2026-10-08T19:38:39.1501551Z" }, "pages": [ { "url": "https://www.growthbook.io/pricing", "kind": "pricing", "status": 200, "checkedAt": "2026-10-08T18:28:10.646220771Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "aa2bc7a1a779" }, { "url": "https://www.growthbook.io/legal/privacy-notice", "kind": "privacy", "status": 200, "checkedAt": "2026-10-08T18:28:08.637436983Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "e574320b3fc5" }, { "url": "https://www.growthbook.io/legal/customer-agreement", "kind": "terms", "status": 200, "checkedAt": "2026-10-08T18:28:06.588048036Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "d5b28f2fb91f" } ], "updatedAt": "2026-10-08T21:12:11.864716877Z" } }, "answer": "GrowthBook scores 70.1 (BB) on agent readiness against Optimizely Experimentation's 62.6 (B), and leads in 6 of 7 scored categories.", "b": { "slug": "optimizely", "name": "Optimizely Experimentation", "vendor": "Optimizely", "vendorUrl": "https://www.optimizely.com", "kind": "http-api", "category": "product-analytics", "summary": "Optimizely Experimentation is a hosted platform for A/B tests, feature flags and personalisation, covering Web Experimentation and Feature Experimentation. Agents reach it through a hosted MCP server with seven tools and through REST APIs.", "url": "https://www.anchorterminal.com/tools/optimizely", "markdownUrl": "https://www.anchorterminal.com/tools/optimizely.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/optimizely.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/optimizely.json", "repo": "https://github.com/optimizely/javascript-sdk", "license": "Proprietary hosted service under Optimizely's Online Software Subscription Agreement and its API, SDK and MCP terms. The Feature Experimentation SDKs on GitHub are Apache 2.0", "transports": [ "http", "streamable-http" ], "remoteUrl": "https://exp.mcp.opal.optimizely.com/mcp", "packages": [ { "registry": "npm", "name": "@optimizely/optimizely-sdk" }, { "registry": "pypi", "name": "optimizely-sdk" } ], "auth": "mixed", "authNotes": "Sales-led. Access needs a subscription. The MCP server uses OAuth 2.0 through Opti ID with PKCE and dynamic client registration, and needs an account with Opal enabled and linked to a Feature Experimentation or Web Experimentation instance. The REST APIs take a personal access token, created under Profile then API Access, in the `Authorization: Bearer` header, or OAuth 2.0 for a registered application. Tokens and MCP sessions act with the user's role.", "pricing": "paid", "pricingNotes": "No price is published. The plans page says every plan is individually packaged and leads to a demo request. No free plan, trial or sandbox was found, so an agent cannot start without a contract. MCP use does not consume Opal credits (https://www.optimizely.com/plans/, checked 2026-10-08).", "priceSummary": "Paid", "where": "hosted", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the docs index, the v2 Swagger spec or the plans page (checked 2026-10-08).", "endpoints": [] }, "toolCount": 7, "popularity": { "githubStars": null, "npmWeekly": 460480, "pypiWeekly": 85924, "asOf": "2026-10-08" }, "docsUrl": "https://docs.optimizely.com/experimentation-strategy/docs/optimizely-experimentation-mcp-server-overview", "llmsTxt": "https://docs.optimizely.com/llms.txt", "openapi": "https://api.optimizely.com/v2/swagger.json", "capabilities": [ "analytics.experiments", "analytics.flags", "analytics.query" ], "tags": [ "official", "hosted", "mcp", "oauth", "openapi", "llms-txt", "closed-source", "sales-led", "enterprise", "webhooks", "status-page", "sla", "soc2", "iso27001", "bug-bounty" ], "lastRelease": "2026-09-18", "graded": true, "anchor": { "graded": true, "score": 62.6, "grade": "B", "agentReady": false, "rank": 330, "ranked": true, "rankOf": 722, "categoryRank": 7, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 68, "maintenance": 78, "payments": 0, "reliability": 73, "schema": 74, "security": 66, "transparency": 75 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-08" }, "negative": 0, "verdict": "Optimizely Experimentation suits agents working for an existing customer that manage flags and experiments and read results. The hosted MCP server has seven tools behind OAuth and carries the user's permissions, and the main REST API has a public Swagger spec. No price, free plan or trial is published, and no 429 or idempotency guidance was found.", "bestFor": "An agent working for an existing Optimizely customer that lists and creates flags, experiments and audiences, reads experiment results and writes SDK integration code.", "strengths": [ "Hosted MCP server with seven tools for querying, managing and implementing flags and experiments, released on 29 April 2026", "MCP sign-in is OAuth 2.0 with PKCE and dynamic client registration, and the server sees only what the user's account can see", "Public Swagger 2.0 spec for the Optimizely API with 93 operations, each with a description, plus llms.txt and a Markdown copy of every docs page", "Rate limits are published with numbers, 120 requests a minute on the Feature Experimentation API and 100 a minute on the Optimizely API", "Change history is readable through the REST API, and change approvals route flag changes to reviewers since 6 August 2026" ], "weaknesses": [ "No price is published. The plans page says every plan is individually packaged and leads to a demo request", "No free plan or trial was found, and the MCP server needs an account with Opal enabled", "No 429 response, `Retry-After` header or idempotency key was found in the spec or the pages read", "The REST OAuth flow has one scope, `all`, described as full access to the account", "The spec for the Feature Experimentation API at `/flags/v1` answers 401 without a token, and the MCP server is not in the official MCP registry" ], "agentNotes": [ "Connect to https://exp.mcp.opal.optimizely.com/mcp and complete OAuth in a browser. The session is time-limited, so expect to sign in again", "Call `exp_get_schemas` before `exp_execute_query`, and `exp_get_entity_templates` before `exp_manage_entity_lifecycle`, to learn the fields each entity needs", "Confirm the project and environment with the user before any create or update. Changes go to live Optimizely data", "Use the Visual Editor for Web Experimentation variation code. The MCP server does not write custom HTML, CSS or JavaScript", "Over REST, stay under 2 requests a second on `/flags/v1`, 100 a minute on `/v2` and 20 a minute on the results endpoints" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 0, "avgRating": 0, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "B", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 62.6 } ], "editorialScores": { "ergonomics": 68, "maintenance": 78, "payments": 0, "reliability": 73, "schema": 74, "security": 66, "transparency": 63 }, "provenanceScore": 86 }, "connect": { "http": "curl -H \"Authorization: Bearer YOUR_ACCESS_TOKEN\" \"https://api.optimizely.com/v2/projects\"", "claudeCode": "claude mcp add --transport http optimizely-exp https://exp.mcp.opal.optimizely.com/mcp", "config": { "mcpServers": { "optimizely-exp": { "type": "http", "url": "https://exp.mcp.opal.optimizely.com/mcp" } } } }, "letme": { "capability": "https://letme.dev/analytics.experiments", "tool": "https://letme.dev/optimizely" }, "area": "business", "provenance": { "legalEntity": "Optimizely North America Inc.", "domain": "optimizely.com", "domainRegistered": "2010-01-11", "endpointOnVendorDomain": true, "terms": "https://www.optimizely.com/legal/terms/", "privacy": "https://www.optimizely.com/legal/privacy-notice/", "statusPage": "https://status.optimizely.com", "changelog": "https://docs.optimizely.com/feature-experimentation/release-notes", "securityTxt": "none", "checked": "2026-10-08", "notes": [ "The Online Software Subscription Agreement 2025-11, published 10 November 2025, names Optimizely North America Inc as the contracting entity for customers in the USA, Canada, Mexico, Australia, New Zealand, APJ and the rest of the world, Optimizely AB for the Nordics, UK, Ireland, EU, UAE and Saudi Arabia, and Optimizely GmbH for DACH.", "The API, SDK and MCP terms, version 2026-08 published 26 August 2026, are a PDF linked from https://www.optimizely.com/legal/api-sdk-mcp-terms/ and form part of the subscription agreement.", "The privacy notice, V 2026-07 published 1 July 2026, says it does not apply to customer data, which Optimizely processes under the subscription agreement and the Data Processing Agreement (V 2026-01).", "The MCP server answers at exp.mcp.opal.optimizely.com and the REST APIs at api.optimizely.com.", "www.optimizely.com/.well-known/security.txt and www.optimizely.com/security.txt both return 404.", "RDAP for optimizely.com gives a registration date of 2010-01-11." ], "score": 86 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/optimizely.json", "live": { "slug": "optimizely", "probe": { "target": "https://exp.mcp.opal.optimizely.com/mcp", "method": "get", "lastAt": "2026-10-08T21:12:17.737693254Z", "lastOk": true, "lastStatus": 401, "lastMs": 147, "lastNote": "asks for credentials", "authRequired": true, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 146, "p95ms24h": 196, "samples24h": 21, "samples30d": 21, "days": [ { "date": "2026-10-08", "probes": 21, "ok": 21 } ] }, "vendorStatus": { "page": "https://status.optimizely.com", "indicator": "none", "summary": "All Systems Operational", "checkedAt": "2026-10-08T21:06:19.531982091Z" }, "updatedAt": "2026-10-08T21:12:17.737693254Z" } }, "facts": [ { "a": "HTTP API", "b": "HTTP API", "name": "Kind" }, { "a": "GrowthBook, Inc.", "b": "Optimizely", "name": "Vendor" }, { "a": "https://mcp.growthbook.io/mcp", "b": "https://exp.mcp.opal.optimizely.com/mcp", "name": "Hosted endpoint" }, { "a": "HTTP, Streamable HTTP, stdio", "b": "HTTP, Streamable HTTP", "name": "Transports" }, { "a": "OAuth or key", "b": "OAuth or key", "name": "Auth" }, { "a": "Freemium", "b": "Paid", "name": "Pricing" }, { "a": "no", "b": "no", "name": "x402" }, { "a": "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", "b": "Proprietary hosted service under Optimizely's Online Software Subscription Agreement and its API, SDK and MCP terms. The Feature Experimentation SDKs on GitHub are Apache 2.0", "name": "Licence" }, { "a": "4", "b": "7", "name": "Tools exposed" }, { "a": "no", "b": "no", "name": "Read-only variant documented" }, { "a": "yes", "b": "yes", "name": "llms.txt" }, { "a": "io.github.growthbook/growthbook-mcp", "b": "not listed", "name": "MCP registry" }, { "a": "2026-10-06", "b": "2026-09-18", "name": "Last release" }, { "a": "2025-06-19", "b": "no date given", "name": "Terms last updated" }, { "a": "2026-06-08", "b": "no date given", "name": "Privacy policy last updated" }, { "a": "yes", "b": "not found in the text", "name": "Customer content may train models" }, { "a": "not found in the text", "b": "not found in the text", "name": "Terms restrict automated access" }, { "a": "yes", "b": "yes", "name": "Terms restrict benchmarking" }, { "a": "not found in the text", "b": "not found in the text", "name": "Terms or service can change without notice" }, { "a": "not found in the text", "b": "not found in the text", "name": "Arbitration or class-action waiver" }, { "a": "8.5k stars, 1.3M npm/wk, 433k PyPI/wk", "b": "460k npm/wk, 86k PyPI/wk", "name": "Popularity" } ], "faq": [ { "answer": "GrowthBook scores 70.1 (BB) on agent readiness against Optimizely Experimentation's 62.6 (B), and leads in 6 of 7 scored categories.", "question": "Which is better for AI agents, GrowthBook or Optimizely Experimentation?" }, { "answer": "Both take an API key or an OAuth sign-in.", "question": "Do GrowthBook and Optimizely Experimentation need an API key?" }, { "answer": "Yes. GrowthBook has a hosted endpoint at https://mcp.growthbook.io/mcp and Optimizely Experimentation at https://exp.mcp.opal.optimizely.com/mcp.", "question": "Can an agent call GrowthBook and Optimizely Experimentation without installing anything?" }, { "answer": "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 Optimizely Experimentation.", "question": "Are GrowthBook and Optimizely Experimentation open source?" } ], "goodFor": [ { "aheadOn": [ "Reliability, 86 against 73", "Agent ergonomics, 76 against 68", "Payments \u0026 pricing, 40 against 0", "Maintenance \u0026 community, 89 against 78" ], "also": [ "Agent-ready, a grade of BB or better", "Runs on your own machine", "Free to start without a card", "Open source" ], "goodFor": "Teams that want flags and experiments analysed against their own warehouse, with an open-source core and a self-hosted option.", "slug": "growthbook", "watchFor": "The API tools take a path and a JSON string and don't validate payloads, so correct calls depend on the bundled skills" }, { "aheadOn": null, "also": [ "No incidents deducted, where GrowthBook loses 3 points for them" ], "goodFor": "An agent working for an existing Optimizely customer that lists and creates flags, experiments and audiences, reads experiment results and writes SDK integration code.", "slug": "optimizely", "watchFor": "No price is published. The plans page says every plan is individually packaged and leads to a demo request" } ], "job": { "capability": "analytics.experiments", "name": "Analytics experiments" }, "others": [ { "json": "https://www.anchorterminal.com/compare/amplitude-vs-growthbook.json", "title": "Amplitude vs GrowthBook", "url": "https://www.anchorterminal.com/compare/amplitude-vs-growthbook" }, { "json": "https://www.anchorterminal.com/compare/amplitude-vs-optimizely.json", "title": "Amplitude vs Optimizely Experimentation", "url": "https://www.anchorterminal.com/compare/amplitude-vs-optimizely" }, { "json": "https://www.anchorterminal.com/compare/fullstory-vs-growthbook.json", "title": "Fullstory vs GrowthBook", "url": "https://www.anchorterminal.com/compare/fullstory-vs-growthbook" }, { "json": "https://www.anchorterminal.com/compare/fullstory-vs-optimizely.json", "title": "Fullstory vs Optimizely Experimentation", "url": "https://www.anchorterminal.com/compare/fullstory-vs-optimizely" }, { "json": "https://www.anchorterminal.com/compare/growthbook-vs-pendo.json", "title": "GrowthBook vs Pendo", "url": "https://www.anchorterminal.com/compare/growthbook-vs-pendo" }, { "json": "https://www.anchorterminal.com/compare/mixpanel-vs-optimizely.json", "title": "Mixpanel vs Optimizely Experimentation", "url": "https://www.anchorterminal.com/compare/mixpanel-vs-optimizely" }, { "json": "https://www.anchorterminal.com/compare/optimizely-vs-pendo.json", "title": "Optimizely Experimentation vs Pendo", "url": "https://www.anchorterminal.com/compare/optimizely-vs-pendo" }, { "json": "https://www.anchorterminal.com/compare/growthbook-vs-heap.json", "title": "GrowthBook vs Heap", "url": "https://www.anchorterminal.com/compare/growthbook-vs-heap" }, { "json": "https://www.anchorterminal.com/compare/growthbook-vs-launchdarkly.json", "title": "GrowthBook vs LaunchDarkly", "url": "https://www.anchorterminal.com/compare/growthbook-vs-launchdarkly" }, { "json": "https://www.anchorterminal.com/compare/growthbook-vs-mixpanel.json", "title": "GrowthBook vs Mixpanel", "url": "https://www.anchorterminal.com/compare/growthbook-vs-mixpanel" }, { "json": "https://www.anchorterminal.com/compare/growthbook-vs-posthog.json", "title": "GrowthBook vs PostHog", "url": "https://www.anchorterminal.com/compare/growthbook-vs-posthog" }, { "json": "https://www.anchorterminal.com/compare/growthbook-vs-statsig.json", "title": "GrowthBook vs Statsig", "url": "https://www.anchorterminal.com/compare/growthbook-vs-statsig" }, { "json": "https://www.anchorterminal.com/compare/optimizely-vs-posthog.json", "title": "Optimizely Experimentation vs PostHog", "url": "https://www.anchorterminal.com/compare/optimizely-vs-posthog" }, { "json": "https://www.anchorterminal.com/compare/optimizely-vs-statsig.json", "title": "Optimizely Experimentation vs Statsig", "url": "https://www.anchorterminal.com/compare/optimizely-vs-statsig" }, { "json": "https://www.anchorterminal.com/compare/launchdarkly-vs-optimizely.json", "title": "LaunchDarkly vs Optimizely Experimentation", "url": "https://www.anchorterminal.com/compare/launchdarkly-vs-optimizely" } ], "scores": [ { "by": 13, "edge": "growthbook", "growthbook": 86, "key": "reliability", "name": "Reliability", "optimizely": 73, "weight": 16 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "by": 2, "edge": "growthbook", "growthbook": 76, "key": "schema", "name": "Schema \u0026 documentation", "optimizely": 74, "weight": 13 }, { "by": 8, "edge": "growthbook", "growthbook": 76, "key": "ergonomics", "name": "Agent ergonomics", "optimizely": 68, "weight": 13 }, { "by": 2, "edge": "growthbook", "growthbook": 68, "key": "security", "name": "Security \u0026 auth", "optimizely": 66, "weight": 14 }, { "by": 40, "edge": "growthbook", "growthbook": 40, "key": "payments", "name": "Payments \u0026 pricing", "optimizely": 0, "weight": 10 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "by": 11, "edge": "growthbook", "growthbook": 89, "key": "maintenance", "name": "Maintenance \u0026 community", "optimizely": 78, "weight": 7 }, { "by": 1, "edge": "optimizely", "growthbook": 74, "key": "transparency", "name": "Transparency \u0026 trust", "optimizely": 75, "weight": 7 } ], "summary": "GrowthBook scores 70.1 (BB) on agent readiness against Optimizely Experimentation's 62.6 (B), and leads in 6 of 7 scored categories. Both do analytics experiments.", "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.", "optimizely": "Optimizely Experimentation suits agents working for an existing customer that manage flags and experiments and read results. The hosted MCP server has seven tools behind OAuth and carries the user's permissions, and the main REST API has a public Swagger spec. No price, free plan or trial is published, and no 429 or idempotency guidance was found." } }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/growthbook-vs-optimizely", "json": "https://www.anchorterminal.com/compare/growthbook-vs-optimizely.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/growthbook-vs-optimizely.md", "slim": "https://www.anchorterminal.com/compare/growthbook-vs-optimizely.min.md" }, "markdown": "GrowthBook scores 70.1 (BB) on agent readiness against Optimizely Experimentation's 62.6 (B), and leads in 6 of 7 scored categories. Both do analytics experiments.\n\n- GrowthBook: grade BB, 70.1/100, rank #142 of 722. Markdown https://www.anchorterminal.com/tools/growthbook.md · JSON https://www.anchorterminal.com/api/v1/tools/growthbook.json\n- Optimizely Experimentation: grade B, 62.6/100, rank #330 of 722. Markdown https://www.anchorterminal.com/tools/optimizely.md · JSON https://www.anchorterminal.com/api/v1/tools/optimizely.json\n\n## Which one, for what\n\n### GrowthBook (BB)\n\nGood for: Teams that want flags and experiments analysed against their own warehouse, with an open-source core and a self-hosted option.\n\nAhead on:\n- Reliability, 86 against 73\n- Agent ergonomics, 76 against 68\n- Payments \u0026 pricing, 40 against 0\n- Maintenance \u0026 community, 89 against 78\n\nAlso in its favour:\n- Agent-ready, a grade of BB or better\n- Runs on your own machine\n- Free to start without a card\n- Open source\n\nWatch for: The API tools take a path and a JSON string and don't validate payloads, so correct calls depend on the bundled skills\n\n### Optimizely Experimentation (B)\n\nGood for: An agent working for an existing Optimizely customer that lists and creates flags, experiments and audiences, reads experiment results and writes SDK integration code.\n\nAlso in its favour:\n- No incidents deducted, where GrowthBook loses 3 points for them\n\nWatch for: No price is published. The plans page says every plan is individually packaged and leads to a demo request\n\n\n## Score by category\n\n| Category | Weight | GrowthBook | Optimizely Experimentation | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 86 | 73 | GrowthBook +13 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 76 | 74 | GrowthBook +2 |\n| Agent ergonomics | 13% (16.2 this run) | 76 | 68 | GrowthBook +8 |\n| Security \u0026 auth | 14% (17.5 this run) | 68 | 66 | GrowthBook +2 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 40 | 0 | GrowthBook +40 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 89 | 78 | GrowthBook +11 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 74 | 75 | Optimizely Experimentation +1 |\n| Negative events | ≤15 | -3 | 0 | |\n| **Total** | | **70.1 · BB** | **62.6 · B** | |\n\n## Facts side by side\n\n| Fact | GrowthBook | Optimizely Experimentation |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | GrowthBook, Inc. | Optimizely |\n| Hosted endpoint | `https://mcp.growthbook.io/mcp` | `https://exp.mcp.opal.optimizely.com/mcp` |\n| Transports | HTTP, Streamable HTTP, stdio | HTTP, Streamable HTTP |\n| Auth | OAuth or key | OAuth or key |\n| Pricing | Freemium | Paid |\n| x402 | no | no |\n| Licence | 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 | Proprietary hosted service under Optimizely's Online Software Subscription Agreement and its API, SDK and MCP terms. The Feature Experimentation SDKs on GitHub are Apache 2.0 |\n| Tools exposed | 4 | 7 |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| MCP registry | `io.github.growthbook/growthbook-mcp` | not listed |\n| Last release | 2026-10-06 | 2026-09-18 |\n| Terms last updated | 2025-06-19 | no date given |\n| Privacy policy last updated | 2026-06-08 | no date given |\n| Customer content may train models | yes | not found in the text |\n| Terms restrict automated access | not found in the text | not found in the text |\n| Terms restrict benchmarking | yes | yes |\n| Terms or service can change without notice | not found in the text | not found in the text |\n| Arbitration or class-action waiver | not found in the text | not found in the text |\n| Popularity | 8.5k stars, 1.3M npm/wk, 433k PyPI/wk | 460k npm/wk, 86k PyPI/wk |\n\n## Verdicts\n\n**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.\n\n**Optimizely Experimentation.** Optimizely Experimentation suits agents working for an existing customer that manage flags and experiments and read results. The hosted MCP server has seven tools behind OAuth and carries the user's permissions, and the main REST API has a public Swagger spec. No price, free plan or trial is published, and no 429 or idempotency guidance was found.\n\n## Before you call either\n\n### GrowthBook\n\n1. 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\n2. Call `growthbook_list_skills` and `growthbook_read_skill` before writing. The API tools don't validate payloads, so use the paths the skill names\n3. Stay under 60 requests a minute per key. On 429 wait for the `RateLimit-Reset` seconds before retrying\n4. List calls return 10 items by default. Pass `limit` up to 100 and `offset` to page\n5. A 422 is a soft warning. Resubmit with `?ignoreWarnings=true` only after reading the message\n\n### Optimizely Experimentation\n\n1. Connect to https://exp.mcp.opal.optimizely.com/mcp and complete OAuth in a browser. The session is time-limited, so expect to sign in again\n2. Call `exp_get_schemas` before `exp_execute_query`, and `exp_get_entity_templates` before `exp_manage_entity_lifecycle`, to learn the fields each entity needs\n3. Confirm the project and environment with the user before any create or update. Changes go to live Optimizely data\n4. Use the Visual Editor for Web Experimentation variation code. The MCP server does not write custom HTML, CSS or JavaScript\n5. Over REST, stay under 2 requests a second on `/flags/v1`, 100 a minute on `/v2` and 20 a minute on the results endpoints\n\n## Questions\n\n### Which is better for AI agents, GrowthBook or Optimizely Experimentation?\n\nGrowthBook scores 70.1 (BB) on agent readiness against Optimizely Experimentation's 62.6 (B), and leads in 6 of 7 scored categories.\n\n### Do GrowthBook and Optimizely Experimentation need an API key?\n\nBoth take an API key or an OAuth sign-in.\n\n### Can an agent call GrowthBook and Optimizely Experimentation without installing anything?\n\nYes. GrowthBook has a hosted endpoint at https://mcp.growthbook.io/mcp and Optimizely Experimentation at https://exp.mcp.opal.optimizely.com/mcp.\n\n### Are GrowthBook and Optimizely Experimentation open source?\n\nGrowthBook 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 Optimizely Experimentation.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/growthbook-vs-optimizely.json, and with the fewest tokens: https://www.anchorterminal.com/compare/growthbook-vs-optimizely.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"growthbook\", \"b\": \"optimizely\"}`. From a terminal: `anchor compare growthbook optimizely`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/growthbook.json and https://www.anchorterminal.com/api/v1/tools/optimizely.json\n\n## Other comparisons with GrowthBook or Optimizely Experimentation\n\n- [Amplitude vs GrowthBook](https://www.anchorterminal.com/compare/amplitude-vs-growthbook.md)\n- [Amplitude vs Optimizely Experimentation](https://www.anchorterminal.com/compare/amplitude-vs-optimizely.md)\n- [Fullstory vs GrowthBook](https://www.anchorterminal.com/compare/fullstory-vs-growthbook.md)\n- [Fullstory vs Optimizely Experimentation](https://www.anchorterminal.com/compare/fullstory-vs-optimizely.md)\n- [GrowthBook vs Pendo](https://www.anchorterminal.com/compare/growthbook-vs-pendo.md)\n- [Mixpanel vs Optimizely Experimentation](https://www.anchorterminal.com/compare/mixpanel-vs-optimizely.md)\n- [Optimizely Experimentation vs Pendo](https://www.anchorterminal.com/compare/optimizely-vs-pendo.md)\n- [GrowthBook vs Heap](https://www.anchorterminal.com/compare/growthbook-vs-heap.md)\n- [GrowthBook vs LaunchDarkly](https://www.anchorterminal.com/compare/growthbook-vs-launchdarkly.md)\n- [GrowthBook vs Mixpanel](https://www.anchorterminal.com/compare/growthbook-vs-mixpanel.md)\n- [GrowthBook vs PostHog](https://www.anchorterminal.com/compare/growthbook-vs-posthog.md)\n- [GrowthBook vs Statsig](https://www.anchorterminal.com/compare/growthbook-vs-statsig.md)\n- [Optimizely Experimentation vs PostHog](https://www.anchorterminal.com/compare/optimizely-vs-posthog.md)\n- [Optimizely Experimentation vs Statsig](https://www.anchorterminal.com/compare/optimizely-vs-statsig.md)\n- [LaunchDarkly vs Optimizely Experimentation](https://www.anchorterminal.com/compare/launchdarkly-vs-optimizely.md)\n", "meta": { "attribution": "Anchor Terminal (https://www.anchorterminal.com)", "docs": "https://www.anchorterminal.com/docs/", "generatedAt": "2026-10-08", "license": "CC-BY-4.0", "method": "https://www.anchorterminal.com/benchmark/", "methodology": "0.4", "openapi": "https://www.anchorterminal.com/openapi.json", "preview": false, "run": "2026-10-01", "runLabel": "October 2026 research run" }, "page": { "breadcrumbs": [ { "name": "Home", "url": "https://www.anchorterminal.com/" }, { "name": "Compare", "url": "https://www.anchorterminal.com/compare/" }, { "name": "GrowthBook vs Optimizely Experimentation", "url": "" } ], "description": "GrowthBook scores 70.1 (BB) on agent readiness against Optimizely Experimentation's 62.6 (B), and leads in 6 of 7 scored categories. Both do analytics experiments. Category scores, facts, verdicts and agent notes side by side.", "facts": [ "GrowthBook BB 70.1", "Optimizely Experimentation B 62.6", "scores" ], "h1": "GrowthBook vs Optimizely Experimentation", "image": "https://www.anchorterminal.com/assets/og/compare-growthbook-vs-optimizely.png", "path": "/compare/growthbook-vs-optimizely", "published": "2026-10-01", "section": "tools", "title": "GrowthBook vs Optimizely Experimentation for AI agents", "toc": null, "updated": "2026-10-08", "url": "https://www.anchorterminal.com/compare/growthbook-vs-optimizely" }, "tokens": { "markdown": 2450, "slim": 780 }, "version": 1 }