Head to head · Analytics experiments · October 2026 research run
GrowthBook vs LaunchDarkly
GrowthBook and LaunchDarkly score within a point of each other on agent readiness, 70.1 (BB) and 69.2 (B). LaunchDarkly leads on schema & documentation and transparency & trust. Both do analytics experiments.
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 64
- Agent ergonomics, 76 against 69
- Maintenance & community, 89 against 82
Also in its favour
- Agent-ready, a grade of BB or better
- 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
Good for An agent that creates and targets feature flags, runs rollouts and experiments, reads experiment results and cleans up stale flags.
Ahead on
- Schema & documentation, 89 against 76
- Transparency & trust, 80 against 74
Also in its favour
- No incidents deducted, where GrowthBook loses 3 points for them
Watch for
The hosted MCP server lists 141 tools, and no tool filter for it was found in the reviewed documentation
Score by category
| Category | Weight this run | GrowthBook | LaunchDarkly | Edge |
|---|---|---|---|---|
| Reliability | 16%20 | 86 | 64 | GrowthBook +22 |
| Performance | 10%pending | pending | pending | not scored in this run |
| Schema & documentation | 13%16.2 | 76 | 89 | LaunchDarkly +13 |
| Agent ergonomics | 13%16.2 | 76 | 69 | GrowthBook +7 |
| Security & auth | 14%17.5 | 68 | 66 | GrowthBook +2 |
| Payments & pricing | 10%12.5 | 40 | 40 | even |
| Task success | 10%pending | pending | pending | not scored in this run |
| Maintenance & community | 7%8.8 | 89 | 82 | GrowthBook +7 |
| Transparency & trust | 7%8.8 | 74 | 80 | LaunchDarkly +6 |
| Negative events | ≤15 | -3 | 0 | |
| Total | 70.1 · BB | 69.2 · B |
Facts side by side
| Fact | GrowthBook | LaunchDarkly |
|---|---|---|
| Kind | HTTP API | HTTP API |
| Vendor | GrowthBook, Inc. | Catamorphic, Co. (dba LaunchDarkly) |
| Hosted endpoint | https://mcp.growthbook.io/mcp | https://mcp.launchdarkly.com/mcp/launchdarkly |
| Transports | HTTP, Streamable HTTP, stdio | HTTP, Streamable HTTP, stdio |
| Auth | OAuth or key | OAuth or key |
| Pricing | Freemium | Freemium |
| x402 | no | no |
| 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 service under LaunchDarkly's terms. The local MCP server is MIT and the ldcli CLI is Apache-2.0 |
| Tools exposed | 4 | 141 |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| MCP registry | io.github.growthbook/growthbook-mcp | not listed |
| Last release | 2026-10-06 | 2026-10-06 |
| Terms last updated | 2025-06-19 | 2025-09-08 |
| Privacy policy last updated | 2026-06-08 | 2025-04-08 |
| Customer content may train models | yes | not found in the text |
| Terms restrict automated access | not found in the text | not found in the text |
| Terms restrict benchmarking | yes | yes |
| Terms or service can change without notice | not found in the text | not found in the text |
| Arbitration or class-action waiver | not found in the text | not found in the text |
| Popularity | 8.5k stars, 1.3M npm/wk, 433k PyPI/wk | 3.3M npm/wk, 2.2M 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.
LaunchDarkly
LaunchDarkly suits agents that manage feature flags, rollouts and experiments. The hosted MCP server uses OAuth with dynamic client registration and marks its tools read-only or destructive, and the Developer plan is free without a card. The server lists 141 tools, numeric rate limits are unpublished, and the web application was unavailable for over an hour on 10 July 2026.
Before you call either
GrowthBook
- 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_skillsandgrowthbook_read_skillbefore 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-Resetseconds before retrying - List calls return 10 items by default. Pass
limitup to 100 andoffsetto page - A 422 is a soft warning. Resubmit with
?ignoreWarnings=trueonly after reading the message
LaunchDarkly
- Connect to https://mcp.launchdarkly.com/mcp/launchdarkly over streamable HTTP with OAuth. On the EU or federal instance run the local
@launchdarkly/mcp-serverwith--server-url - Authorise with a Reader role or the
readerscope unless the task writes. A 403 after consent means the member's role lacks access - Send
LD-API-Version: 20240415on every REST call, andLD-API-Version: betafor beta resources, which answer 403 without it - Read
X-Ratelimit-Global-Remaining,X-Ratelimit-Route-RemainingandX-Ratelimit-Reseton each response, and waitRetry-Afterseconds on an IP limit - Send
Content-Type: application/json; domain-model=launchdarkly.semanticpatchfor semantic patches, or the body is read as JSON patch and answers 400
Questions
Which is better for AI agents, GrowthBook or LaunchDarkly?
GrowthBook and LaunchDarkly score within a point of each other on agent readiness, 70.1 (BB) and 69.2 (B). LaunchDarkly leads on schema & documentation and transparency & trust.
Do GrowthBook and LaunchDarkly need an API key?
Both take an API key or an OAuth sign-in.
Can an agent call GrowthBook and LaunchDarkly without installing anything?
Yes. GrowthBook has a hosted endpoint at https://mcp.growthbook.io/mcp and LaunchDarkly at https://mcp.launchdarkly.com/mcp/launchdarkly.
Are GrowthBook and LaunchDarkly 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 LaunchDarkly.
Other comparisons with GrowthBook or LaunchDarkly
Machine-readable
- This page as Markdown
/compare/growthbook-vs-launchdarkly.md· slim.min.md· JSON.json(or sendAccept: text/markdown) - Each listing in full
/api/v1/tools/growthbook.json·/api/v1/tools/launchdarkly.json - From a terminal
anchor compare growthbook launchdarkly(the CLI) - Over MCP
compare_tools {"a": "growthbook", "b": "launchdarkly"}at/mcp, no key