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Best Form API Software in 2026

If your forms need to do more than collect a basic response, compare the capabilities and submission details that shape how they fit your workflow. Compared on conditional logic, deployment model, electronic signatures, file uploads, free plan, monthly submissions, paid from, and webhooks, the entries cover useful distinctions to review. Endatix, forms.app, and HeadlessForms are among the names shown. Think about whether respondents need to upload files or sign electronically, and whether conditional paths or webhooks matter for your process. Deployment options and monthly submission limits, alongside free-plan availability and paid-from pricing, can help narrow the choices.

  1. 1

    Orbeon Forms

    Free plan Open source APILinuxSelf-hosted+1

    Choose Orbeon Forms if you need extensive form-building controls, multiple deployment options, and connections to databases or other systems.

    8.6 From $1,300/yr · 90-day trial Visit site
  2. 2

    OpnForm

    Free plan Open source APISelf-hostedWeb

    OpnForm offers a broad set of form-building and distribution options, including unlimited submissions on its free plan.

    8.5 Free plan · paid from $25/mo Visit site
  3. 3

    SurveyJS

    by SurveyJS
    Free plan Open source APISelf-hostedWeb

    SurveyJS offers a free form-rendering library alongside commercial tools for form creation, analysis, and PDF output.

    8.4 Free plan Visit site
  4. 4

    Endatix

    Free plan APILinuxMac+3

    Endatix offers flexible form building and deployment, including a free self-hosted API and a hosted option. Hosted Endatix Cloud starts at $360 a month, while Hub pricing is custom.

    7.7 Free plan · paid from $360/mo Visit site
  5. 5

    Forminit

    Free plan AndroidAPIiPhone+1

    Forminit separates form design from submission handling, with validation, uploads, spam controls, and integrations in its backend.

    7.5 Free plan · paid from $15.83/mo (annual) Visit site
  6. 6

    Basin

    Free plan APIWeb

    Basin combines form collection, spam controls, file uploads, and integrations in a cloud service.

    7.4 Free plan · paid from $12.50/mo (annual) · 14-day trial Visit site
  7. 7

    Feathery

    Free plan APIWeb

    Choose Feathery if your financial services team needs configurable workflows for onboarding, underwriting, account opening, or document handling.

    7.3 Free plan · pricing on request Visit site
  8. 8

    FormBackend

    Free plan APIWeb

    FormBackend combines form handling, submission management, and several delivery options, with two distinct free plans.

    7.3 Free plan · paid from $5/mo Visit site
  9. 9

    Formcarry

    Free plan APIWeb

    Choose Formcarry if you need a form API with email notifications, validation, and integrations without writing backend processing code.

    7.3 Free plan · paid from $5/mo (annual) Visit site
  10. 10

    Form.io

    by Form.io
    Free plan APISelf-hostedWeb

    Choose Form.io if your team needs configurable forms and APIs that can be rendered in applications or deployed in a customer controlled environment.

    7.3 From $300/mo · 30-day trial Visit site
  11. 11

    Formidable

    Free plan APIWeb

    Choose Formidable if you need form generation alongside conditional logic, computed fields, or rule-based decisions.

    7.2 Free plan · paid from $15/mo Visit site
  12. 12

    Formester

    by Formester
    Free plan Web

    Choose Formester if you need a web form builder with quizzes, payment collection, and unlimited forms and responses across its first three tiers.

    7.1 Free plan · paid from $12/mo (annual) Visit site
  13. 13

    FormKeep

    Free plan APIWeb

    FormKeep offers a backend for existing HTML forms alongside a visual form builder. Check the submission cap and retention period for the plan you choose, since excess submissions are ignored.

    7.1 Free plan · paid from $4.99/mo Visit site
  14. 14

    Formly

    Free plan APIWeb

    Formly combines form creation, distribution, and response analysis, with a free-use option and paid Pro features.

    7.1 From $24/mo (annual) Visit site
  15. 15

    FormTitan

    Free plan AndroidAPIiPhone+3

    FormTitan combines Salesforce-connected form creation with document, portal, survey, and workflow functions.

    7.1 Visit site
  16. 16

    Formsite

    by Formsite
    Free plan APIWeb

    Formsite covers form creation, response collection, payments, and connections to other services.

    7.0 Free plan · 14-day trial Visit site
  17. 17

    forms.app

    by forms.app
    Free plan Web

    forms.app combines form creation, sharing, and team management in a web service, with a free tier that has unlimited responses but caps forms and storage.

    6.9 Free plan · paid from $19/mo (annual) Visit site
  18. 18

    Formspark

    Free plan APIWeb

    Choose Formspark if you want a form backend with a free tier, submission exports, spam screening, and routing integrations.

    6.9 Free plan · paid from $50 Visit site
  19. 19

    Formspree

    Free plan APIWeb

    Choose Formspree to collect and manage website form submissions without maintaining a backend, especially if custom markup and workflow tools matter.

    6.9 Free plan · paid from $10/mo Visit site
  20. 20

    FormSubmit

    Free plan APIWeb

    FormSubmit provides email delivery and several controls for routing, spam handling and submission processing.

    6.9 Free plan Visit site
  21. 21

    Formsort

    Free plan Web

    Formsort combines form-building, testing, integrations, and data-handling provisions in a web-based tool.

    6.8 Free plan · paid from $279/mo Visit site
  22. 22

    HeadlessForms

    Free plan APIWeb

    HeadlessForms offers several ways to build and host forms, along with email automation and submission controls. The Free plan has a one-form limit; paid pricing is listed from $3.75/mo (annual).

    6.8 Free plan · paid from $3.75/mo (annual) Visit site
  23. 23

    Paperform

    by Paperform
    Free plan APIWeb

    Paperform brings forms, signatures and workflow automation together, with AI tools and extensive integrations.

    6.7 Free plan · paid from $29/mo · 7-day trial Visit site
  24. 24

    Web3Forms

    Free plan APIWeb

    Web3Forms offers a backend-free route from website forms to an inbox, with free use for up to 250 submissions each month.

    6.6 Free plan Visit site
  25. 25

    Forms & Workflow (OpenForms)

    Paid APIWeb

    OpenForms combines form creation with case management and activity records in a cloud service.

    5.2 Pricing on request Visit site

#1Places #1, #2, #3, #4, #5 on this list can be bought by the makers of the software on it. See the price

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