Split Forms — Free Form Backend for Static and AI-Built Sites

What is Split Forms?

Split Forms is a hosted form backend. Instead of building server code to receive contact-form submissions, you point any form's action attribute at the Split Forms endpoint (https://splitforms.com/api/submit) and add a hidden access_key input; submissions are then stored, spam-filtered, and emailed to you. No server, PHP, or SDK is required, and the service works with plain HTML as well as React, Next.js, Astro, Vue, Svelte, Webflow, Framer, Carrd, WordPress, and Shopify forms.

The service is explicitly aimed at developers, indie makers, agencies, and builders of static or AI-generated ("vibe-coded") websites who need a working contact form without maintaining a backend. A distinguishing feature is an MCP server with 12 tools, included on all plans, that lets AI agents such as ChatGPT or Claude build forms and wire them up programmatically. The site states the company was founded in 2012, with founder Raman Makkar, and is run by an independent team.

How Split Forms Works

Setup is deliberately minimal: set your form's action to the Split Forms endpoint and include a hidden input carrying your access key. From that point, every submission is stored in your dashboard inbox — searchable and filterable — and sent to you by email on all plans. Spam protection runs by default without a CAPTCHA: a honeypot field, a timing trap, per-IP rate limits, and content scoring, with optional reCAPTCHA or Cloudflare Turnstile if you want it.

On paid plans, submissions can be routed further: signed webhooks, integrations, CSV exports, and auto-replies. The free plan keeps working after its quota is reached in a safe way — the endpoint returns HTTP 429 until you upgrade, so no submissions are silently dropped.

Main Features

• Universal form endpoint — one URL plus an access key turns any HTML, React, Next.js, WordPress, or AI-built form into a working contact form.
• Submissions dashboard — an inbox with search and filters, plus email notifications on every plan.
• Spam protection without CAPTCHA — honeypot, timing trap, per-IP rate limits, and content scoring by default; optional reCAPTCHA or Turnstile.
• MCP server for AI agents — 12 tools that let ChatGPT, Claude, or other agents create and configure forms; included on all plans.
• Paid integrations and webhooks — Slack, Discord, Google Sheets, Notion, Airtable, Zapier, n8n, HubSpot, Mailchimp, Make, Telegram, WhatsApp, and Teams, backed by HMAC-SHA256 signed webhooks.
• Payments and file uploads — Stripe payments on forms and file uploads (up to 5 files of 5 MB each) on paid plans.

Pricing

The free plan costs $0 and includes 500 submissions — a one-time total, not a monthly allowance — with unlimited forms, no card required, and no expiry. When the quota is exhausted, the endpoint returns HTTP 429 until an upgrade. Pro costs $5 per month for 5,000 submissions per month. The annual plan costs $49 per year for 15,000 submissions per month (about $4.08/month) and includes all Pro features: signed webhooks, integrations, CSV exports, file uploads, Stripe payments, auto-replies and routing, and 3 team seats. The homepage also publishes a direct competitor comparison, listing Formspree's free tier at 50/month with a $15/month entry paid plan and Web3Forms at 250/month free with $149/year paid.

Common Use Cases

• Static-site contact forms — landing pages and portfolios on hosts with no backend.
• AI-built (vibe-coded) websites — forms for sites generated by AI builders, wired up by the same agents through the MCP server.
• Framework apps without form infrastructure — Next.js, React, Astro, Vue, or Svelte projects that only need contact or feedback capture.
• Client websites — agencies standardizing form handling across WordPress, Webflow, Shopify, or Carrd builds.
• Lead routing — paid plans forwarding submissions to Slack, Google Sheets, CRMs, or webhooks.

Limitations

The free quota is lifetime, not monthly — 500 submissions total, after which the endpoint rejects new submissions until upgrading. File uploads, webhooks, integrations, payments, auto-replies, and team seats are paid-only. The site is upfront that there is no contractual SLA (only a public status page) and that EU data residency is on the roadmap rather than available. File uploads are capped at 5 files of 5 MB each. Data is stored in Supabase Postgres with row-level security and a DPA is available, but buyers with strict compliance needs should verify terms directly. Split Forms is a form backend, not a form builder — the visual form-building side is limited to the dashboard and templates, and the 2012 founding date sits oddly alongside a product clearly built for the current AI-site wave, so the company history is not fully explained.

Summary

Split Forms does one job — receiving form submissions from sites with no backend — and documents it unusually well, down to competitor price tables and its own limitations. The two-line setup, CAPTCHA-free spam filtering, 500 free lifetime submissions, and an MCP server that lets AI agents wire forms make it a natural fit for static, framework, and AI-built websites. The paid tier is cheap ($5/month) and adds the integrations most teams eventually want. Its constraints are equally clear: no SLA, no EU residency yet, paid-only routing features, and a lifetime rather than renewing free quota. It is best for developers and makers who want form handling to disappear into two lines of HTML.