# Amplitude vs GrowthBook

> GrowthBook scores 70.1 (BB) on agent readiness against Amplitude's 66.2 (B), and leads in 5 of 7 scored categories. Amplitude leads on security & auth. Both do analytics query. Category scores, facts, verdicts and agent notes side by side.

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- Updated: 2026-10-08

GrowthBook scores 70.1 (BB) on agent readiness against Amplitude's 66.2 (B), and leads in 5 of 7 scored categories. Amplitude leads on security & auth. Both do analytics query.

- Amplitude: grade B, 66.2/100, rank #243 of 722. Markdown https://www.anchorterminal.com/tools/amplitude.md · JSON https://www.anchorterminal.com/api/v1/tools/amplitude.json
- 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

## Which one, for what

### Amplitude (B)

Good for: A team already on Amplitude that wants an agent to query charts, funnels, retention and experiment results, edit dashboards and manage the tracking plan under its own permissions.

Ahead on:
- Security & auth, 74 against 68

Also in its favour:
- No incidents deducted, where GrowthBook loses 3 points for them

Watch for: No rate limit for the MCP server or the Developer API was found in the reviewed documentation

### 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 60
- Payments & pricing, 40 against 30
- Maintenance & community, 89 against 83

Also in its favour:
- Agent-ready, a grade of BB or better
- 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


## Score by category

| Category | Weight | Amplitude | GrowthBook | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 60 | 86 | GrowthBook +26 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 72 | 76 | GrowthBook +4 |
| Agent ergonomics | 13% (16.2 this run) | 72 | 76 | GrowthBook +4 |
| Security & auth | 14% (17.5 this run) | 74 | 68 | Amplitude +6 |
| Payments & pricing | 10% (12.5 this run) | 30 | 40 | GrowthBook +10 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 83 | 89 | GrowthBook +6 |
| Transparency & trust | 7% (8.8 this run) | 78 | 74 | Amplitude +4 |
| Negative events | ≤15 | 0 | -3 | |
| **Total** | | **66.2 · B** | **70.1 · BB** | |

## Facts side by side

| Fact | Amplitude | GrowthBook |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Amplitude, Inc. | GrowthBook, Inc. |
| Hosted endpoint | `https://mcp.amplitude.com/mcp` | `https://mcp.growthbook.io/mcp` |
| Transports | HTTP, Streamable HTTP | HTTP, Streamable HTTP, stdio |
| Auth | OAuth or key | OAuth or key |
| Pricing | Freemium | Freemium |
| x402 | no | no |
| Licence | Proprietary service under Amplitude's terms of service. The SDKs, the `amp` CLI and the MCP marketplace plugins on GitHub and npm are MIT | 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 |
| Tools exposed | 45 | 4 |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| MCP registry | `com.amplitude/mcp-server` | `io.github.growthbook/growthbook-mcp` |
| Last release | 2026-10-02 | 2026-10-06 |
| Terms last updated | 2026-07-21 | 2025-06-19 |
| Privacy policy last updated | 2026-08-31 | 2026-06-08 |
| 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 | yes | not found in the text |
| Arbitration or class-action waiver | yes | not found in the text |
| Popularity | 1.3M npm/wk, 1.8M PyPI/wk | 8.5k stars, 1.3M npm/wk, 433k PyPI/wk |

## Verdicts

**Amplitude.** The remote MCP server covers queries, funnels, retention, experiments and flags under OAuth with PKCE, read and write scopes and per-project role actions, and the Free plan needs no card. No MCP rate limits or SLA were found, and status.amplitude.com records a critical outage of the UI, MCP and REST APIs on 13 July 2026.

**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.

## Before you call either

### Amplitude

1. Connect to https://mcp.amplitude.com/mcp, or https://mcp.eu.amplitude.com/mcp for EU projects. The client must support streaming HTTP and OAuth, since API keys aren't accepted
2. Append `?discovery=progressive` to load tool schemas on demand, then call `get_amplitude_context` first to pick the project and read its AI context
3. Ask an admin for a role with only Use MCP (read) on the projects you need. Tools stay listed and fail at call time when the role lacks the action
4. Send events through the HTTP V2 API with an `insert_id` on each one. On 429, pause that user or device for 30 seconds before retrying
5. Budget Dashboard REST queries by cost (days times conditions times chart cost), within 108,000 an hour and 5 concurrent requests per project

### 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

## Questions

### Which is better for AI agents, Amplitude or GrowthBook?

GrowthBook scores 70.1 (BB) on agent readiness against Amplitude's 66.2 (B), and leads in 5 of 7 scored categories. Amplitude leads on security & auth.

### Do Amplitude and GrowthBook need an API key?

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

### Can an agent call Amplitude and GrowthBook without installing anything?

Yes. Amplitude has a hosted endpoint at https://mcp.amplitude.com/mcp and GrowthBook at https://mcp.growthbook.io/mcp.

### Are Amplitude and GrowthBook open source?

No open-source release is listed for Amplitude. 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).


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/amplitude-vs-growthbook.json, and with the fewest tokens: https://www.anchorterminal.com/compare/amplitude-vs-growthbook.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "amplitude", "b": "growthbook"}`. From a terminal: `anchor compare amplitude growthbook`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/amplitude.json and https://www.anchorterminal.com/api/v1/tools/growthbook.json

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- [Fullstory vs GrowthBook](https://www.anchorterminal.com/compare/fullstory-vs-growthbook.md)
- [GrowthBook vs Pendo](https://www.anchorterminal.com/compare/growthbook-vs-pendo.md)
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- [GrowthBook vs Optimizely Experimentation](https://www.anchorterminal.com/compare/growthbook-vs-optimizely.md)
- [GrowthBook vs PostHog](https://www.anchorterminal.com/compare/growthbook-vs-posthog.md)
- [GrowthBook vs Statsig](https://www.anchorterminal.com/compare/growthbook-vs-statsig.md)
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