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Head-to-head · Form API Software

Form.io vs OpnForm

  • Updated Oct 2026
  • Both researched from official sources
  • 2 checks side by side
Higher score Form.io #1 in Form API Software 9.3/10 30-day trial Free trial✓ 1 of 4 features Visit Form.io
OpnForm #4 in Form API Software 8.8/10 Free plan Free plan✓ 1 of 4 features Visit OpnForm

Form.io leads on 0 checks, OpnForm on 1, and 1 is even. Who comes out ahead on the 2 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreForm.io · 9.3/10
  • Free planonly OpnForm
  • Free trialonly Form.io

Form.io scores higher on our rubric for form api software: 9.3 against 8.8 out of 10; our editors rank them #1 and #4.

OpnForm offers free plan; Form.io doesn't.

Form.io is the better fit for API-first teams needing self-hosting. OpnForm is the better fit for budget-conscious teams wanting self-hosting.

  • Form.io fits best

    API-first teams needing self-hosting

  • OpnForm fits best

    Budget-conscious teams wanting self-hosting

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature Form.io 9.3/10 Visit ↗ OpnForm 8.8/10 Visit ↗
At a glance
Editor score 9.3 8.8
Ranking #1 in Form API Software #4 in Form API Software
Best for API-first teams needing self-hosting Budget-conscious teams wanting self-hosting
Pricing model Paid Free plan + paid
Starting price $2,640/seat/yr $25/mo
Free plan — ✓ (best)
Free trial 30 days —
Deployment Cloud, Self-hosted Cloud, Self-hosted
Platforms Web Web
Support Email, Community, Docs Live chat, Community, Docs
Compliance SSO/SAML, 2FA GDPR, SSO/SAML, 2FA
Integrations 14 integrations 8 integrations
Built for Mid-market, Enterprise Solo, Small business, Mid-market, Enterprise
Features Form.io 1/4 · OpnForm 1/4
Conditional logic Not checked yet Not checked yet
Webhooks Not checked yet Not checked yet
File uploads ✓ ✓
Electronic signatures Not checked yet Not checked yet
Specs
Deployment model Not checked yet Not checked yet
Monthly submissions Not checked yet Not checked yet
Our review
Pros
  • JSON-driven forms and REST APIs with conditional logic and validation
  • Docker self-hosting, SSO, roles, permissions, and controlled data ownership
  • Webhooks, storage providers, email services, and external integrations
  • Unlimited forms and submissions on the Free plan
  • REST API, webhooks, payments, uploads, and computed fields
  • Self-hosted deployment with SSO options and audit logs
Cons
  • Starts at $300 per month, with no free plan
  • Advanced capabilities are split across multiple paid environments and modules
  • The SaaS trial becomes read-only after 30 days without continued payment
  • Advanced roles and permissions begin on the Business plan
  • Enterprise SSO and compliance features require the Enterprise tier
  • Community Edition includes community support rather than priority support
Our verdict

Form.io is a developer-focused platform for building JSON-driven forms, resources, workflows, and REST APIs. Teams can use its drag-and-drop form and API builder, embed forms in websites and applications, add conditional logic and…

Read the review →

OpnForm is an online form builder and form API for individuals, creators, teams, agencies, and enterprises. It supports surveys, workflows, conditional logic, computed fields, multi-step layouts, file uploads, Stripe payments, webhooks,…

Read the review →
  1. Form.ioForm API Software 9.330-day trial
  2. OpnFormForm API Software 8.8Free plan

Strengths and trade-offs

  • Form.io — where it wins

    • JSON-driven forms and REST APIs with conditional logic and validation
    • Docker self-hosting, SSO, roles, permissions, and controlled data ownership
    • Webhooks, storage providers, email services, and external integrations

    Where it doesn't

    • Starts at $300 per month, with no free plan
    • Advanced capabilities are split across multiple paid environments and modules
    • The SaaS trial becomes read-only after 30 days without continued payment

  • OpnForm — where it wins

    • Unlimited forms and submissions on the Free plan
    • REST API, webhooks, payments, uploads, and computed fields
    • Self-hosted deployment with SSO options and audit logs

    Where it doesn't

    • Advanced roles and permissions begin on the Business plan
    • Enterprise SSO and compliance features require the Enterprise tier
    • Community Edition includes community support rather than priority support

More comparisons

All form API software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update