Fillout alternatives
The highest-scoring alternative to Fillout is Tally at 82/100 on the AgentReady, against 56/100 for Fillout.
All scored in Forms & Data Collection.
What Tally does that Fillout does not
Tally passes mcp discoverable, openapi / spec quality, request examples provided, response examples provided, errors and status codes documented, programmatic credential creation, official python sdk, mcp integration available, machine-readable errors, agent compatibility verified, and Fillout fails them. That is the whole of the gap between the two scores, so if none of those matter to your agent the ranking above overstates the difference.
Why people look for an alternative
Fillout fails llms-full.txt / full agent docs, mcp discoverable, openapi / spec quality, authentication documented, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented, programmatic credential creation, official python sdk, cli available, mcp integration available, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable, agent compatibility verified. Each one is a place an unattended run stops, which is usually what sends someone looking in the first place.
Where Fillout loses the points
| Pillar | Fillout | What it measures |
|---|---|---|
| Discover | 80 | Can an agent find it at all: sitemap, robots, structured data. |
| Understand | 38 | Is there a spec, an llms.txt, a machine-readable description. |
| Adopt | 60 | Signup, keys, SDKs, and whether a human has to be involved. |
| Operate | 47 | Rate-limit headers, errors, status, and behaviour under load. |
Fillout is weakest on understand at 38/100. Without a spec an agent has to guess at endpoints, and it guesses wrong. If that is the part your agent depends on, take the ranking above seriously; if it is not, Fillout may still be the right pick.
What an agent runs into with Fillout
These are the findings from the last audit on 2026-08-23. Each one is a place unattended software stops, which is the practical reason to look at the list above.
- Ship an MCP server so agents can call you as a tool.
- Publish MCP install instructions so agents can discover the server.
- Flesh out the OpenAPI: paths, schemas, and descriptions.
- Document error responses as an enum in your OpenAPI.
- Let agents create API keys programmatically.
- Ship an official Python SDK on PyPI.
- Return X-RateLimit / Retry-After headers so agents pace themselves.
- Publish an AGENTS.md or llms-full.txt with full agent context.
What this category actually supports
Across the 8 products scored in Forms & Data Collection, build a form is offered by 100%.
An agent can get this list directly: resolve("alternative to Fillout") over the MCP server, or GET /v1/categories/forms.