Formidable
Formidable is a cloud-based form builder that uses natural-language descriptions to generate forms.
What Formidable is
Formidable is a cloud-based form builder that uses natural-language descriptions to generate forms. Conditional logic can show, hide, or require fields based on answers and expressions. Computed fields evaluate in real time to produce weighted scores, boolean outcomes, or formatted results, and business rules can determine whether a submission should be approved, rejected, or escalated. Forms can be hosted, shared by link, embedded in an iframe, and connected to webhooks for receiving submissions. Formidable also offers a JSON REST API and the open-source Forma React library for rendering form specifications in a custom interface. Its privacy policy says account, form, and submission data are stored within the European Union. It says generation prompts may be processed by Anthropic, but respondent and submission data are not sent to AI services. The Free plan costs nothing and includes one published form and 1,000 submissions/month. Starter costs $15 a month and includes unlimited forms and 5,000 submissions/month. Submissions beyond a plan’s monthly limit are not accepted until the next billing cycle unless the user upgrades.
Good
- Conditional fields can respond to answers and expressions.
- Computed fields evaluate expressions in real time.
- Forms can be published, embedded, or connected through webhooks.
- Submission and respondent data are not sent to AI services, according to the policy.
Watch out
- Free includes one published form.
- Submissions beyond the monthly limit are not accepted without an upgrade.
- Generation prompts may be processed by Anthropic.
Who it suits
Formidable suits people who need forms with conditional fields, calculated outcomes, or rule-based approval decisions. Its API and React library also suit teams building custom form interfaces.
Verdict
Formidable combines AI-assisted form creation with conditional logic, calculations, and approval workflows. Review the submission limits and prompt-processing policy before choosing a plan.
Plans and prices
From Formidable's own pricing page, checked 3 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Free | Free | 1 published form · 1,000 submissions/month · AI tokens included as a one-time allowance · conditional logic, computed fields, webhooks, analytics · forever |
| Form Pass | $9, paid once | +1 published form on Free tier · 5,000 submissions/month for that form · one-time |
| Starter | $15 a month | Unlimited published forms · 5,000 submissions/month · 10x AI tokens/month · removes Formidable branding · monthly |
| Pro | $49 a month | Unlimited published forms · 10,000 submissions/month · 30x AI tokens/month · priority support · monthly |
The facts
Each one read from Formidable's own pages, with the date it was checked.
What it does
- AI data handling
- The policy says form-generation prompts may be processed by Anthropic, while submission data and respondent information are not sent to AI services.checked 3 Oct 2026
- API and React
- Formidable offers a JSON REST API and an open-source Forma React library for rendering form specifications in a custom interface.checked 3 Oct 2026
- Computed fields
- Computed fields support weighted scores, boolean outcomes, and formatted outputs, with expressions evaluated in real time.checked 3 Oct 2026
- Conditional logic
- Fields can appear, disappear, or become required based on answers and conditional expressions.checked 3 Oct 2026
- Data location
- The privacy policy says account, form, and submission data are stored within the European Union.checked 3 Oct 2026
- Data roles
- Formidable says it is the data controller for user account data and acts as processor for data submitted through users’ forms.checked 3 Oct 2026
- Integrations
- The published pages identify webhooks, a JSON API, and a React SDK as integration options.checked 3 Oct 2026
- Product
- Formidable is an AI-powered form builder that generates forms from natural-language descriptions.checked 3 Oct 2026
- Publishing
- Users can publish hosted forms, share links, embed forms in an iframe, and receive submissions through webhooks.checked 3 Oct 2026
- Security
- The privacy policy lists encryption at rest and in transit, access controls and authentication, and regular security assessments as safeguards.checked 3 Oct 2026
- Support
- The documentation lists [email protected] as the help email, and the Pro plan includes priority support.checked 3 Oct 2026
- Usage limit
- Submissions beyond a plan’s monthly limit are not accepted until the next billing cycle unless the user upgrades.checked 3 Oct 2026
Where it runs
- Approval workflows
- Forms can compute approve, reject, or escalation outcomes from business rules and eligibility criteria.checked 3 Oct 2026
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