Head to head · Analytics events · October 2026 research run
GrowthBook vs Heap
GrowthBook scores 70.1 (BB) on agent readiness against Heap's 53 (D), and leads in every scored category. Both do analytics events.
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 72
- Schema & documentation, 76 against 57
- Agent ergonomics, 76 against 49
- Security & auth, 68 against 41
- Payments & pricing, 40 against 25
- Maintenance & community, 89 against 63
- Transparency & trust, 74 against 64
Also in its favour
- Agent-ready, a grade of BB or better
- Runs on your own machine
- Free to start without a card
- 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
Heap D
Good for An agent that records backend events or enriches user and account properties in a company's existing Heap project, or that files privacy deletions.
Also in its favour
- No incidents deducted, where GrowthBook loses 3 points for them
Watch for
No query, export or definitions endpoint in the developer reference. Reading results needs the app, Heap Connect or the MCP server we couldn't read
Score by category
| Category | Weight this run | GrowthBook | Heap | Edge |
|---|---|---|---|---|
| Reliability | 16%20 | 86 | 72 | GrowthBook +14 |
| Performance | 10%pending | pending | pending | not scored in this run |
| Schema & documentation | 13%16.2 | 76 | 57 | GrowthBook +19 |
| Agent ergonomics | 13%16.2 | 76 | 49 | GrowthBook +27 |
| Security & auth | 14%17.5 | 68 | 41 | GrowthBook +27 |
| Payments & pricing | 10%12.5 | 40 | 25 | GrowthBook +15 |
| Task success | 10%pending | pending | pending | not scored in this run |
| Maintenance & community | 7%8.8 | 89 | 63 | GrowthBook +26 |
| Transparency & trust | 7%8.8 | 74 | 64 | GrowthBook +10 |
| Negative events | ≤15 | -3 | 0 | |
| Total | 70.1 · BB | 53 · D |
Facts side by side
| Fact | GrowthBook | Heap |
|---|---|---|
| Kind | HTTP API | HTTP API |
| Vendor | GrowthBook, Inc. | Contentsquare (Content Square, Inc.) |
| Hosted endpoint | https://mcp.growthbook.io/mcp | https://heapanalytics.com |
| Transports | HTTP, Streamable HTTP, stdio | HTTP |
| Auth | OAuth or key | OAuth or key |
| Pricing | Freemium | Freemium |
| Price for analytics events | $0. per transaction | not published |
| 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 Contentsquare's master services agreement. The React Native bridge and the Node client on npm are MIT |
| Tools exposed | 4 | none |
| 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 | no date given |
| Privacy policy last updated | 2026-06-08 | couldn't be read |
| Customer content may train models | yes | yes |
| 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 | 213 npm/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.
Heap
Heap's server-side API suits an agent that records events. Limits are published, bulk calls take 1,000 items and track accepts an idempotency key. The API returns no analytics, and ingest calls carry no secret beyond the environment ID. Heap's help centre lists a Heap MCP article, which a bot check stopped us reading, so the MCP server is ungraded.
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
Heap
- Send EU projects to https://c.eu.heap-api.com instead of https://heapanalytics.com. The path stays the same
- Pass one of
identityoruser_idon track, never both - Set
idempotency_keyon every track event so a retry doesn't duplicate it - Stay under 30 requests per 30 seconds per identity, or batch up to 1,000 events in one bulk call
- For deletion, exchange the app_id and API key of the Main Production environment for a token first. Any other environment ID returns Unauthorized
Questions
Which is better for AI agents, GrowthBook or Heap?
GrowthBook scores 70.1 (BB) on agent readiness against Heap's 53 (D), and leads in every scored category.
Do GrowthBook and Heap need an API key?
Both take an API key or an OAuth sign-in.
Can an agent call GrowthBook and Heap without installing anything?
Yes. GrowthBook has a hosted endpoint at https://mcp.growthbook.io/mcp and Heap at https://heapanalytics.com.
Are GrowthBook and Heap 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 Heap.
Other comparisons with GrowthBook or Heap
Machine-readable
- This page as Markdown
/compare/growthbook-vs-heap.md· slim.min.md· JSON.json(or sendAccept: text/markdown) - Each listing in full
/api/v1/tools/growthbook.json·/api/v1/tools/heap.json - From a terminal
anchor compare growthbook heap(the CLI) - Over MCP
compare_tools {"a": "growthbook", "b": "heap"}at/mcp, no key