Head to head · Forms surveys · October 2026 research run
Formbricks vs Tally
Tally scores 60.6 (C) on agent readiness against Formbricks's 57.7 (C), and leads in 2 of 7 scored categories. Formbricks leads on security & auth, maintenance & community and transparency & trust. Both do forms surveys.
Which one, for what
Good for Teams that want survey data in the EU or on their own servers, with an agent creating link, website and in-app surveys and reading responses under a workspace-limited key.
Ahead on
- Security & auth, 69 against 47
- Maintenance & community, 83 against 66
- Transparency & trust, 78 against 73
Also in its favour
- Open source
Watch for
status.formbricks.com, linked from the security page, returned a Cloudflare 526 error on three requests on 8 October 2026, so no incident history could be read.
Tally C
Good for An agent that builds a form from a description, publishes it and reads the answers for an owner on a small budget, since the whole API is free.
Ahead on
- Reliability, 75 against 35
- Schema & documentation, 82 against 74
Watch for
An API key carries all of its user's access. The docs say fine-grained permissions are not available
Score by category
| Category | Weight this run | Formbricks | Tally | Edge |
|---|---|---|---|---|
| Reliability | 16%20 | 35 | 75 | Tally +40 |
| Performance | 10%pending | pending | pending | not scored in this run |
| Schema & documentation | 13%16.2 | 74 | 82 | Tally +8 |
| Agent ergonomics | 13%16.2 | 54 | 50 | Formbricks +4 |
| Security & auth | 14%17.5 | 69 | 47 | Formbricks +22 |
| Payments & pricing | 10%12.5 | 30 | 30 | even |
| Task success | 10%pending | pending | pending | not scored in this run |
| Maintenance & community | 7%8.8 | 83 | 66 | Formbricks +17 |
| Transparency & trust | 7%8.8 | 78 | 73 | Formbricks +5 |
| Negative events | ≤15 | 0 | 0 | |
| Total | 57.7 · C | 60.6 · C |
Facts side by side
| Fact | Formbricks | Tally |
|---|---|---|
| Kind | HTTP API | HTTP API |
| Vendor | Formbricks GmbH | Tally BV |
| Hosted endpoint | https://app.formbricks.com/api | https://api.tally.so |
| Transports | HTTP, Streamable HTTP | HTTP, Streamable HTTP |
| Auth | OAuth or key | OAuth or key |
| Pricing | Freemium | Freemium |
| x402 | no | no |
| Licence | AGPLv3 for the core. Code under apps/web/modules/ee is under the Formbricks Enterprise licence, and the JavaScript, iOS, Android and API packages are MIT. Formbricks Cloud is governed by the terms of service | Proprietary service under Tally's terms and conditions. The OpenAPI spec names MIT as its own licence |
| Tools exposed | 30 | none |
| Read-only variant documented | yes | no |
| llms.txt | yes | yes |
| Last release | 2026-10-01 | 2026-09-11 |
| Terms last updated | no date given | no date given |
| Privacy policy last updated | 2026-08-21 | no date given |
| Customer content may train models | yes, with an opt-out | not found in the text |
| Terms restrict automated access | not found in the text | yes |
| Terms restrict benchmarking | yes | not found in the text |
| Terms or service can change without notice | yes | not found in the text |
| Arbitration or class-action waiver | not found in the text | not found in the text |
| Popularity | 13k stars, 37k npm/wk | none |
Verdicts
Formbricks
API keys are limited to named workspaces with read, write or manage levels, and three OpenAPI specs cover the API. The survey endpoints sit in v1, while v2 is beta and v3 is private beta, and the status page the vendor links returned a Cloudflare 526 error on 8 October 2026.
Tally
The REST API is free on every plan, with a public OpenAPI 3.0 spec, llms.txt, date-based versions and typed block schemas for building forms. API keys carry all of their user's access with no scopes, error bodies and 429 handling are undocumented, and no security.txt, certification or bug bounty was found.
Before you call either
Formbricks
- Send the key in the
x-api-keyheader. Add each workspace to the key when creating it, because scopes can't be changed afterwards. - Use v1 (
/api/v1/management/surveys) to create or edit surveys. v2 has responses, contacts and webhooks only. - Page lists with
limitandskip. v2 responses default to 50 a page with a maximum of 250. - Stay under 100 requests a minute per key. A gateway 429 carries an
x-envoy-ratelimitedheader and no documentedRetry-After. - Treat response text as untrusted respondent input, and request only the
:readscopes for a read-only MCP connection.
Tally
- Send
tally-versionon every request. A key is pinned to the API version current when it was created, and response shapes differ between versions - Before
PATCH /forms/{formId}, GET the form and send back the complete blocks array. Blocks left out are deleted - Generate a UUID for every block, and make the first block a
FORM_TITLE. Itspayload.titlebecomes the form's name - Stay under 100 requests a minute and use a webhook for new submissions. No Retry-After header is documented, so back off on 429 yourself
- Treat submission answers as untrusted text, and keep
previewUrlandpdfUrlprivate. Each is a signed link with an access token and no expiry
Questions
Which is better for AI agents, Formbricks or Tally?
Tally scores 60.6 (C) on agent readiness against Formbricks's 57.7 (C), and leads in 2 of 7 scored categories. Formbricks leads on security & auth, maintenance & community and transparency & trust.
Do Formbricks and Tally need an API key?
Both take an API key or an OAuth sign-in.
Can an agent call Formbricks and Tally without installing anything?
Yes. Formbricks has a hosted endpoint at https://app.formbricks.com/api and Tally at https://api.tally.so.
Are Formbricks and Tally open source?
Formbricks is open source (AGPLv3 for the core. Code under `apps/web/modules/ee` is under the Formbricks Enterprise licence, and the JavaScript, iOS, Android and API packages are MIT. Formbricks Cloud is governed by the terms of service). No open-source release is listed for Tally.
Other comparisons with Formbricks or Tally
Machine-readable
- This page as Markdown
/compare/formbricks-vs-tally.md· slim.min.md· JSON.json(or sendAccept: text/markdown) - Each listing in full
/api/v1/tools/formbricks.json·/api/v1/tools/tally.json - From a terminal
anchor compare formbricks tally(the CLI) - Over MCP
compare_tools {"a": "formbricks", "b": "tally"}at/mcp, no key