Open Source • MIT Licensed

Forms without
limits.

The open-source form backend where you bring your own API keys. Store submissions, trigger integrations. No vendor lock-in.

100 free submissions/month • No credit card
<form
  action="https://osforms.com/api/v1/f/your-slug"
  method="POST"
>
  <input type="text" name="name" placeholder="Name" required />
  <input type="email" name="email" placeholder="Email" required />
  <textarea name="message" placeholder="Your message"></textarea>
  <button type="submit">Send</button>
</form>
OSS
Open Source
100/mo
Free Tier
0%
Vendor Lock-In
<5min
Setup Time

Everything you need. Nothing you don't.

Built for developers who value control, transparency, and speed.

Zero Vendor Lock-In

Your API keys, your data, your control. Export anytime, self-host if you want. No proprietary formats.

All Integrations Free

Resend, Google Sheets, webhooks—all included. Competitors charge $15/mo for features you already pay for.

Developer-First API

REST API, webhook signatures, CORS control. Built by developers who read docs, not marketing decks.

Integrations that don't cost extra

Connect your own API keys. Pay only your provider's costs.

Resend
Email forwarding
Google Sheets
Auto-append rows
Webhooks
HMAC-signed POST

100 submissions

Free forever

No credit card required.

Get Started Free

Ready to own your form backend?

Join developers building forms without limits. Open source. No lock-in.