# Optimizely Experimentation vs Userpilot (slim)

> Optimizely Experimentation and Userpilot score within a point of each other for analytics queries, 64.9 and 64.4 out of 100. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/optimizely-vs-userpilot.md (~4,250 tokens) · this version ~2,180 tokens · JSON https://www.anchorterminal.com/compare/optimizely-vs-userpilot.json · canonical https://www.anchorterminal.com/compare/optimizely-vs-userpilot
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-11-07
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)

Optimizely Experimentation and Userpilot score within a point of each other on agent readiness, 64.9 (B) and 64.4 (B). Userpilot leads on payments & pricing. Both do analytics queries.

- Optimizely Experimentation: B 64.9, rank #443 of 1486 · https://www.anchorterminal.com/tools/optimizely.min.md
- Userpilot: B 64.4, rank #471 of 1486 · https://www.anchorterminal.com/tools/userpilot.min.md
- Optimizely Experimentation, 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. Ahead on Schema & documentation, 76 against 71; Agent ergonomics, 68 against 60; Transparency & trust, 75 against 59.
- Userpilot, good for SaaS teams already using Userpilot for onboarding who want an agent to answer analytics questions and draft segments and surveys. Ahead on Payments & pricing, 30 against 0. Also Free to start without a card.

| Category | Optimizely Experimentation | Userpilot |
| --- | --- | --- |
| Reliability (16%) | 83 | 82 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 76 | 71 |
| Agent ergonomics (13%) | 68 | 60 |
| Security & auth (14%) | 66 | 62 |
| Payments & pricing (10%) | 0 | 30 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 78 | 79 |
| Transparency & trust (7%) | 75 | 59 |

| Fact (where they differ) | Optimizely Experimentation | Userpilot |
| --- | --- | --- |
| Vendor | Optimizely | Userpilot, Inc. |
| Hosted endpoint | `https://exp.mcp.opal.optimizely.com/mcp` | `https://mcp.userpilot.io/mcp` |
| 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 | none |
| Tools exposed | 8 | none |
| MCP registry | not listed | `io.userpilot/mcp` |
| Last release | 2026-10-15 | 2026-10-11 |
| Terms last updated | no date given | 2024-04-23 |
| Privacy policy last updated | no date given | 2025-03-11 |
| Terms restrict benchmarking | yes | not found in the text |
| 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 | 236k npm/wk |
| Agent reviews | 2/5 (4) | none |

Why the edge:
- Payments & pricing, Userpilot +30: Optimizely Experimentation 0 (No x402, MPP or L402 (0). No price is published. The plans page says every plan is individually packaged and leads to a demo request (0). No free plan or trial was found on the plans page, the product pages or the docs (0). Access needs a subscription and a browser sign-in through Opti ID (0).); Userpilot 30 (No x402, MPP or L402 (0). Plan prices are public ($299 and from $849 a month), with no per-unit prices (10). 14-day free trial with no card required (20). Signup and OAuth approval happen in a browser (0). 0+10+20+0 = 30.)
- Transparency & trust, Optimizely Experimentation +16: Optimizely Experimentation 75 (Closed hosted service under a published Online Software Subscription Agreement and API, SDK and MCP terms. The SDKs are open source under Apache 2.0 (17 of 30). The privacy notice of 1 July 2026 says it does not cover customer data and points to the subscription agreement and the Data Processing Agreement (V 2026-01), which agree. Event data is kept 18 months, and customer data may be deleted 30 days after a subscription ends. How the MCP server and Opal handle prompts for Experimentation is not stated on the MCP pages (22 of 30). The API, SDK and MCP terms let Optimizely revise, suspend or cancel any API or MCP at any time under its documentation and policies. An SDK compatibility matrix exists. No deprecation policy with a notice period was found for the APIs (6 of 20). The sub-processor list, updated 14 September 2026, names providers by product with hosting locations. Web and Feature Experimentation list Amazon Web Services in the United States and Google Cloud in the United States and Europe (18 of 20).); Userpilot 59 (A closed service with terms dated 23 April 2024 (15 of 30). The privacy policy of 11 March 2025 names a DPO and two sub-processors (AWS and Cloudflare), while the security page names AWS, Google Cloud and Stripe. The DPA is on request and no customer-data retention period is stated (14 of 30). No deprecation policy or dated API notices found (3 of 20). Sub-processors are named with addresses but not data locations, though an EU ingestion endpoint exists (10 of 20). 15+14+3+10 = 42.)
- Agent ergonomics, Optimizely Experimentation +8: Optimizely Experimentation 68 (The MCP server lists eight tools since `exp_program_reporting_execute_query` was added on 13 October 2026, which is 25 on the checklist. We took 2 off because the tool definitions were unread and their size is unknown (23 of 25). `per_page` up to 100 and `page` on the v2 lists, `page_token`, `sort` and `query` on the flags list, and time windows on results (17 of 20). The Optimizely API returns `code`, `message` and a `uuid`, and the Feature Experimentation API returns a problem detail object. MCP error results were unread (13 of 20). No idempotency keys were found and the tool annotations were unread. The docs say the agent confirms project, environment and details before a change, which is client behaviour, and entities are archived through the lifecycle tool (5 of 20). The MCP server needs only a URL. The official SDKs in eleven languages evaluate flags and log events and do not cover the management APIs (10 of 15).); Userpilot 60 (The tool count isn't published; the docs say the assistant can search hundreds of extra read-only operations on demand, which reads as dynamic loading. Without the list we give the middle band (15 of 25). Export jobs filter by date range, users, events and segments, and job lists paginate (14 of 20). A documented error reference (13 of 20). No deletes or admin through MCP by design; annotations weren't readable and no idempotency keys were found (10 of 20). The HTTP APIs have no official server-side SDK; client SDKs for web and six mobile frameworks (8 of 15). 15+14+13+10+8 = 60.)
- Schema & documentation, Optimizely Experimentation +5: Optimizely Experimentation 76 (The Swagger 2.0 file for the Optimizely API sits at api.optimizely.com, whose robots.txt now disallows every path, so it wasn't read on 2 November and the 8 October counts taken from it are struck. Each reference page on docs.optimizely.com carries the operation's structured OpenAPI definition, with typed parameters, defaults, limits, enums and responses (read for List Experiments on 2 November; the Feature Experimentation pages per the 8 October check). We could not read the MCP tool schemas, which need a sign-in (20 of 25). llms.txt and a Markdown copy of every docs page (10). Reference pages describe each operation's purpose. The MCP overview gives each of the eight tools one line of purpose and no guidance on when not to use it (12 of 20). Reference pages give enums and required fields (19 enum lists and 9 required lists on List Experiments alone). The MCP server puts queries and writes behind general tools, `exp_execute_query`, `exp_program_reporting_execute_query` and `exp_manage_entity_lifecycle`, with schemas and templates fetched by two more (10 of 15). Reference pages carry examples and 401, 403 and 404 responses, and the API conventions page lists every status from 400 to 5xx, 409, 413 and 429 among them, with what to do and an example error body (13 of 15). Versions are in the path (`/v2`, `/flags/v1`) and each product has dated release notes with an RSS feed. No changelog for the APIs alone was found (11 of 15). 20 + 10 + 12 + 10 + 13 + 11 = 76.); Userpilot 71 (Every API reference page embeds an OpenAPI 3.0 definition, though no standalone spec file was found (20 of 25). llms.txt and Markdown versions of every page (10). Endpoint pages state their purpose and the MCP docs say what each permission allows; the MCP tool definitions weren't read because that needs a session (12 of 20). Request bodies are typed, mostly as strings and string arrays with few enums (9 of 15). An error reference covers 400, 401, 422 and 429 with causes, and pages carry examples (12 of 15). /v1 paths and dated SDK release notes; no API changelog was found (8 of 15). 20+10+12+9+12+8 = 71.)