# Optimizely Experimentation vs Statsig

> Statsig scores 72.3 (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.

- Canonical: https://www.anchorterminal.com/compare/optimizely-vs-statsig
- Markdown: https://www.anchorterminal.com/compare/optimizely-vs-statsig.md (~2,300 tokens)
- Slim: https://www.anchorterminal.com/compare/optimizely-vs-statsig.min.md (~730 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/optimizely-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: 2026-10-09

Statsig scores 72.3 (BB) on agent readiness against Optimizely Experimentation's 62.6 (B), and leads in 6 of 7 scored categories. Both do analytics experiments.

- 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
- Statsig: grade BB, 72.3/100, rank #94 of 722. Markdown https://www.anchorterminal.com/tools/statsig.md · JSON https://www.anchorterminal.com/api/v1/tools/statsig.json

## Which one, for what

### Optimizely Experimentation (B)

Good 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.

Watch for: No price is published. The plans page says every plan is individually packaged and leads to a demo request

### 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 73
- Schema & documentation, 82 against 74
- Security & auth, 74 against 66
- Payments & pricing, 40 against 0

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 | Optimizely Experimentation | Statsig | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 73 | 79 | Statsig +6 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 74 | 82 | Statsig +8 |
| Agent ergonomics | 13% (16.2 this run) | 68 | 71 | Statsig +3 |
| Security & auth | 14% (17.5 this run) | 66 | 74 | Statsig +8 |
| Payments & pricing | 10% (12.5 this run) | 0 | 40 | Statsig +40 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 78 | 81 | Statsig +3 |
| Transparency & trust | 7% (8.8 this run) | 75 | 75 | even |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **62.6 · B** | **72.3 · BB** | |

## Facts side by side

| Fact | Optimizely Experimentation | Statsig |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Optimizely | Amplitude, Inc. |
| Hosted endpoint | `https://exp.mcp.opal.optimizely.com/mcp` | `https://api.statsig.com/v3/mcp` |
| Transports | HTTP, Streamable HTTP | HTTP, Streamable HTTP |
| Auth | OAuth or key | OAuth or key |
| Pricing | Paid | Freemium |
| x402 | no | no |
| Licence | 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 | Proprietary hosted service under Statsig's self-service or enterprise terms. The SDKs and the agent skills repository on GitHub are ISC |
| Tools exposed | 7 | 18 |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| MCP registry | not listed | `com.statsig/statsig-mcp-server` |
| Last release | 2026-09-18 | 2026-09-28 |
| Terms last updated | no date given | 2025-08-04 |
| Privacy policy last updated | no date given | 2026-08-31 |
| Customer content may train models | not found in the text | 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 | 460k npm/wk, 86k PyPI/wk | 4.2M npm/wk, 894k PyPI/wk |

## Verdicts

**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.

**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

### Optimizely Experimentation

1. 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
2. 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
3. Confirm the project and environment with the user before any create or update. Changes go to live Optimizely data
4. Use the Visual Editor for Web Experimentation variation code. The MCP server does not write custom HTML, CSS or JavaScript
5. Over REST, stay under 2 requests a second on `/flags/v1`, 100 a minute on `/v2` and 20 a minute on the results endpoints

### 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, Optimizely Experimentation or Statsig?

Statsig scores 72.3 (BB) on agent readiness against Optimizely Experimentation's 62.6 (B), and leads in 6 of 7 scored categories.

### Do Optimizely Experimentation and Statsig need an API key?

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

### Can an agent call Optimizely Experimentation and Statsig without installing anything?

Yes. Optimizely Experimentation has a hosted endpoint at https://exp.mcp.opal.optimizely.com/mcp and Statsig at https://api.statsig.com/v3/mcp.


## For agents

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

## Other comparisons with Optimizely Experimentation or Statsig

- [Amplitude vs Optimizely Experimentation](https://www.anchorterminal.com/compare/amplitude-vs-optimizely.md)
- [Amplitude vs Statsig](https://www.anchorterminal.com/compare/amplitude-vs-statsig.md)
- [Fullstory vs Optimizely Experimentation](https://www.anchorterminal.com/compare/fullstory-vs-optimizely.md)
- [Fullstory vs Statsig](https://www.anchorterminal.com/compare/fullstory-vs-statsig.md)
- [Mixpanel vs Optimizely Experimentation](https://www.anchorterminal.com/compare/mixpanel-vs-optimizely.md)
- [Mixpanel vs Statsig](https://www.anchorterminal.com/compare/mixpanel-vs-statsig.md)
- [Optimizely Experimentation vs Pendo](https://www.anchorterminal.com/compare/optimizely-vs-pendo.md)
- [Pendo vs Statsig](https://www.anchorterminal.com/compare/pendo-vs-statsig.md)
- [PostHog vs Statsig](https://www.anchorterminal.com/compare/posthog-vs-statsig.md)
- [Heap vs Statsig](https://www.anchorterminal.com/compare/heap-vs-statsig.md)
- [GrowthBook vs Optimizely Experimentation](https://www.anchorterminal.com/compare/growthbook-vs-optimizely.md)
- [GrowthBook vs Statsig](https://www.anchorterminal.com/compare/growthbook-vs-statsig.md)
- [Optimizely Experimentation vs PostHog](https://www.anchorterminal.com/compare/optimizely-vs-posthog.md)
- [LaunchDarkly vs Optimizely Experimentation](https://www.anchorterminal.com/compare/launchdarkly-vs-optimizely.md)
- [LaunchDarkly vs Statsig](https://www.anchorterminal.com/compare/launchdarkly-vs-statsig.md)