# Formbricks vs Formstack (slim)

> Formbricks scores 57.7 (C) on agent readiness against Formstack's 49 (D), and leads in 6 of 7 scored categories. Formstack leads on reliability. Both do forms create. Category scores, facts, verdicts and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/formbricks-vs-formstack.md (~2,350 tokens) · this version ~780 tokens · JSON https://www.anchorterminal.com/compare/formbricks-vs-formstack.json · canonical https://www.anchorterminal.com/compare/formbricks-vs-formstack
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-08

Formbricks scores 57.7 (C) on agent readiness against Formstack's 49 (D), and leads in 6 of 7 scored categories. Formstack leads on reliability. Both do forms create.

- Formbricks: C 57.7, rank #465 of 722 · https://www.anchorterminal.com/tools/formbricks.min.md
- Formstack: D 49, rank #616 of 722 · https://www.anchorterminal.com/tools/formstack.min.md
- Formbricks, 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 Schema & documentation, 74 against 69; Security & auth, 69 against 43; Payments & pricing, 30 against 15; Maintenance & community, 83 against 20; Transparency & trust, 78 against 64. Also Open source.
- Formstack, good for An organisation that already runs Formstack Forms, has bought the API add-on and wants an agent to build forms, read or search submissions and manage signed webhooks, including HIPAA and PCI use. Ahead on Reliability, 63 against 35.

| Category | Formbricks | Formstack |
| --- | --- | --- |
| Reliability (16%) | 35 | 63 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 74 | 69 |
| Agent ergonomics (13%) | 54 | 52 |
| Security & auth (14%) | 69 | 43 |
| Payments & pricing (10%) | 30 | 15 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 83 | 20 |
| Transparency & trust (7%) | 78 | 64 |

| Fact (where they differ) | Formbricks | Formstack |
| --- | --- | --- |
| Vendor | Formbricks GmbH | Intellistack, LLC |
| Hosted endpoint | `https://app.formbricks.com/api` | `https://www.formstack.com/api/v2025` |
| Transports | HTTP, Streamable HTTP | HTTP |
| Auth | OAuth or key | Token |
| Pricing | Freemium | Paid |
| 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 the Intellistack Software Services Agreement. No vendor SDK or open-source client was found |
| Tools exposed | 30 | none |
| Read-only variant documented | yes | no |
| Last release | 2026-10-01 | 2026-06-18 |
| Terms last updated | no date given | couldn't be read |
| Privacy policy last updated | 2026-08-21 | couldn't be read |
| Customer content may train models | yes, with an opt-out | couldn't be read |
| Terms restrict automated access | not found in the text | couldn't be read |
| Terms restrict benchmarking | yes | couldn't be read |
| Terms or service can change without notice | yes | couldn't be read |
| Arbitration or class-action waiver | not found in the text | couldn't be read |
| Popularity | 13k stars, 37k npm/wk | none |