Documents & Writing
Best Form API Software in 2026
Form API software helps gather responses and connect submitted information with other systems or workflows. Compared on conditional logic, file uploads, electronic signatures, and webhooks, the entries also specify deployment model and monthly submission volume.
- 01 Forminit
It suits developers, agencies, freelancers, startups, and AI/vibe coders who want control over form design while outsourcing backend handling.
From $15.83/mo Free plan Web · iOS · Android · API9.1 Visit Specs - 02 FormTitan
It suits organizations using Salesforce for intake, lead capture, surveys or connected document workflows.
From $150/mo Free plan Web · Windows · macOS · iOS8.8 Visit Specs - 03
Endatix Endatix suits organizations that need form and survey workflows while retaining control over their data.
From $360/mo Free plan Web · Windows · macOS · Linux8.7 Visit Specs - 04
forms.app forms.app suits teams creating forms, collecting responses or payments, and collaborating through shared form management.
From $19/mo Free plan Web8.7 Visit Specs - 05 Orbeon Forms
It suits organizations building forms with rules, attachments, document output, and integrations.
From $108.33/mo Free plan Open source Web · Linux · API · Self-hosted8.6 Visit Specs - 06
OpnForm From $25/mo Free plan Open source Web · API · Self-hosted8.5 Visit Specs - 07
Form.io Form.io suits enterprise teams that build form-driven applications, including developers and business teams.
From $220/mo Free trial Web · API · Self-hosted8.4 Visit Specs - 08
Formsite Formsite suits people building forms, surveys, quizzes, or ecommerce pages who need conditional logic, uploads, or payment collection.
Free plan Web · API8.4 Visit Specs - 09
Paperform Paperform suits individuals and teams that need forms, payments, e-signatures, or workflow automation.
From $29/mo Free plan Web · API8.4 Visit Specs - 10
SurveyJS SurveyJS suits developers building web forms who want to host libraries in their own application and connect their chosen backend.
From $19.92/mo Free plan Open source Web · API · Self-hosted8.4 Visit Specs - 11 Basin
Basin suits designers, developers and businesses that want to process forms without building server-side handling.
From $2.01/mo Free plan Web · API8.3 Visit Specs - 12
Feathery Feathery suits insurance and wealth-management firms building onboarding, account-opening, underwriting or servicing workflows.
Free plan Web · API8.3 Visit Specs - 13 Formcarry
Formcarry may suit people who need to receive website form submissions without building backend processing.
From $5/mo Free plan Web · API8.3 Visit Specs - 14
FormKeep FormKeep suits web designers, marketing teams, and customer specialists handling hosted or embedded forms.
From $4.99/mo Free plan Web · API8.3 Visit Specs - 15 FormBackend
FormBackend suits people who need to collect form submissions without building server-side handling.
From $5/mo Free plan Web · API8.2 Visit Specs - 16 Formidable
Formidable suits teams that need rule-driven forms, computed results, approvals, and webhook delivery.
From $15/mo Free plan Web · API8.2 Visit Specs - 17
Formsort From $279/mo Free plan Web8.2 Visit Specs - 18 Formspree
It suits website owners, freelancers, startups, agencies, and teams needing hosted form handling.
From $15/mo Free plan Web · API8.0 Visit Specs - 19 Formly From $2/mo Web · API7.9 Visit Specs
- 20 Formspark Free plan Web · API7.9 Visit Specs
- 21 FormSubmit Free plan Web · API7.8 Visit Specs
- 22 HeadlessForms
It suits bloggers, business owners, designers, developers, and photographers who need form collection on a website or through a hosted link.
From $1,928/mo Free plan Web · API7.8 Visit Specs - 23
Formester From $13/mo Free plan Web7.7 Visit Specs - 24 Web3Forms From $4.08/mo Free plan Web · API7.5 Visit Specs
- 25 Forms & Workflow (OpenForms) Web · API7.0 Visit Specs
Free-plan availability and paid-from pricing offer useful cost context. Paperform, Endatix, and Basin are options to weigh against the forms you need to build and what respondents must provide. Consider whether conditional paths or signatures matter, how you plan to deploy the software, and what should happen once a response arrives.