# Heap vs Statsig

> Statsig scores 72.3 (BB) on agent readiness against Heap's 53 (D), and leads in every scored category. Both do analytics events. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/heap-vs-statsig
- Markdown: https://www.anchorterminal.com/compare/heap-vs-statsig.md (~2,050 tokens)
- Slim: https://www.anchorterminal.com/compare/heap-vs-statsig.min.md (~730 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/heap-vs-statsig.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-08

Statsig scores 72.3 (BB) on agent readiness against Heap's 53 (D), and leads in every scored category. Both do analytics events.

- Heap: grade D, 53/100, rank #488 of 629. Markdown https://www.anchorterminal.com/tools/heap.md · JSON https://www.anchorterminal.com/api/v1/tools/heap.json
- Statsig: grade BB, 72.3/100, rank #89 of 629. Markdown https://www.anchorterminal.com/tools/statsig.md · JSON https://www.anchorterminal.com/api/v1/tools/statsig.json

## Which one, for what

### 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.

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

### 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:
- Reliability, 79 against 72
- Schema & documentation, 82 against 57
- Agent ergonomics, 71 against 49
- Security & auth, 74 against 41
- Payments & pricing, 40 against 25
- Maintenance & community, 81 against 63
- Transparency & trust, 75 against 64

Also in its favour:
- Agent-ready, a grade of BB or better
- Free to start without a card

Watch for: Console API errors carry only `status` and `message`, and the spec documents no 429 response


## Score by category

| Category | Weight | Heap | Statsig | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 72 | 79 | Statsig +7 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 57 | 82 | Statsig +25 |
| Agent ergonomics | 13% (16.2 this run) | 49 | 71 | Statsig +22 |
| Security & auth | 14% (17.5 this run) | 41 | 74 | Statsig +33 |
| Payments & pricing | 10% (12.5 this run) | 25 | 40 | Statsig +15 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 63 | 81 | Statsig +18 |
| Transparency & trust | 7% (8.8 this run) | 64 | 75 | Statsig +11 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **53 · D** | **72.3 · BB** | |

## Facts side by side

| Fact | Heap | Statsig |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Contentsquare (Content Square, Inc.) | Amplitude, Inc. |
| Hosted endpoint | `https://heapanalytics.com` | `https://api.statsig.com/v3/mcp` |
| Transports | HTTP | HTTP, Streamable HTTP |
| Auth | OAuth or key | OAuth or key |
| Pricing | Freemium | Freemium |
| Price for analytics events | not published | $0.0001 per transaction |
| x402 | no | no |
| Licence | Proprietary service under Contentsquare's master services agreement. The React Native bridge and the Node client on npm are MIT | Proprietary hosted service under Statsig's self-service or enterprise terms. The SDKs and the agent skills repository on GitHub are ISC |
| Tools exposed | none | 18 |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| MCP registry | not listed | `com.statsig/statsig-mcp-server` |
| Last release | 2026-10-06 | 2026-09-28 |
| Terms last updated | no date given | 2025-08-04 |
| Privacy policy last updated | couldn't be read | 2026-08-31 |
| 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 | yes |
| Arbitration or class-action waiver | not found in the text | yes |
| Popularity | 213 npm/wk | 4.2M npm/wk, 894k PyPI/wk |

## Verdicts

**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.

**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

### Heap

1. Send EU projects to https://c.eu.heap-api.com instead of https://heapanalytics.com. The path stays the same
2. Pass one of `identity` or `user_id` on track, never both
3. Set `idempotency_key` on every track event so a retry doesn't duplicate it
4. Stay under 30 requests per 30 seconds per identity, or batch up to 1,000 events in one bulk call
5. For deletion, exchange the app_id and API key of the Main Production environment for a token first. Any other environment ID returns Unauthorized

### 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, Heap or Statsig?

Statsig scores 72.3 (BB) on agent readiness against Heap's 53 (D), and leads in every scored category.

### Do Heap and Statsig need an API key?

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

### Can an agent call Heap and Statsig without installing anything?

Yes. Heap has a hosted endpoint at https://heapanalytics.com and Statsig at https://api.statsig.com/v3/mcp.


## For agents

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

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