Best Form API Software in 2026
Updated
In short: Endatix is ranked #1 of 25 as of 4 October 2026, ahead of forms.app and HeadlessForms. The best-ranked option with a free plan is forms.app. The lowest first paid tier on this page is Formcarry at $0.42/mo.
Collecting information with forms may involve more than the questions respondents see: submissions can include files or signatures and connect to follow-on workflows. These entries are compared on conditional logic, file uploads, electronic signatures, webhooks, deployment model, and monthly submissions, as well as free plans and paid-from pricing. Endatix and Feathery appear first, followed by OpnForm. Consider what people need to submit, whether conditional paths or signatures matter, and how you want submissions handled; the deployment and monthly-submission details can help narrow the options.
25 form API software ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
16 of the 25 here have a free tier you can use, 0 have open-source code on record, and 0 have full bars: free, open, on most of your devices and documented.
| # | App | Signal | Free tier | Open code | Devices | From | Score |
|---|---|---|---|---|---|---|---|
| 1 | EndatixWeb · Windows · Mac · Linux · Self-hosted · API | Three bars | — | 4 of 6 | $360/mo | 6.6 | |
| 2 | forms.appWeb | Two bars | — | 1 of 6 | $19/mo | 6.4 | |
| 3 | HeadlessFormsWeb · API | Two bars | — | 1 of 6 | $1,928/mo | 6.4 | |
| 4 | OpnFormWeb · Self-hosted · API | Two bars | — | 1 of 6 | $25/mo | 6.4 | |
| 5 | PaperformWeb · API | Two bars | — | 1 of 6 | $4.08/mo | 6.4 | |
| 6 | SurveyJSWeb · Self-hosted · API | Two bars | — | 1 of 6 | Free | 6.4 | |
| 7 | BasinWeb · API | Two bars | — | 1 of 6 | $1.04/mo | 6.3 | |
| 8 | FormBackendWeb · API | Two bars | — | 1 of 6 | $5/mo | 6.3 | |
| 9 | FormcarryWeb · API | Two bars | — | 1 of 6 | $0.42/mo | 6.3 | |
| 10 | FormesterWeb | Two bars | — | 1 of 6 | $13/mo | 6.3 | |
| 11 | FormidableWeb · API | Two bars | — | 1 of 6 | $15/mo | 6.3 | |
| 12 | FormKeepWeb | Two bars | — | 1 of 6 | $4.99/mo | 6.3 | |
| 13 | FormsiteWeb | Two bars | — | 1 of 6 | Free | 6.3 | |
| 14 | FormsortWeb | Two bars | — | 1 of 6 | $279/mo | 6.3 | |
| 15 | FormspreeWeb · API | Two bars | — | 1 of 6 | $15/mo | 6.3 | |
| 16 | FeatheryWeb | Two bars | — | 1 of 6 | Free | 6.2 | |
| 17 | Forms & Workflow (OpenForms)Web | No signal | — | — | 1 of 6 | — | 5.2 |
| 18 | Web3FormsWeb | No signal | — | — | 1 of 6 | — | 5.2 |
| 19 | ForminitWeb | No signal | — | — | 1 of 6 | — | 5.1 |
| 20 | FormsparkWeb | No signal | — | — | 1 of 6 | — | 5.1 |
| 21 | FormSubmitWeb | No signal | — | — | 1 of 6 | — | 5.1 |
| 22 | FormTitanWeb | No signal | — | — | 1 of 6 | — | 5.1 |
| 23 | Form.ioWeb | One bar | — | — | 1 of 6 | $220/mo | 5.0 |
| 24 | Orbeon FormsWeb | No signal | — | — | 1 of 6 | — | 5.0 |
| 25 | FormlyWeb | No signal | — | — | 1 of 6 | $29/mo | 4.8 |
Is your app on this list?
Numbered spots on this list can be sponsored. They are labelled, and the editorial order and scores never change for payment.
Questions about this list
Which form API software is ranked first on Freedom251?
Endatix is ranked #1 of 25 with a score of 6.6. forms.app is second and HeadlessForms third.
How many of these have a free plan?
16 of the 25 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, Formcarry has the lowest first paid tier we found: $0.42/mo.
How is this list ranked?
Ranked free-and-open first: a usable free tier and open-source code, then the platforms it runs on and its documentation. Paid placements never change a rank.