onsubmit.dev - Form Submissions to Email and Slack

Serverless form submissions - no backend required

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Updated Jul 2026 · Added Jul 2026

onsubmit.dev

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What is Onsubmit Dev?

onsubmit.dev is a serverless form backend that captures HTML form submissions and delivers them via email, Slack, Discord, Telegram, webhooks, and 6+ integrations. Simply point your form's action attribute to an onsubmit.dev endpoint - no backend infrastructure, configuration, or deployment needed. It's designed for developers, agencies, and anyone building static sites who need reliable form handling without managing servers.

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Key Features of Onsubmit Dev

Email notifications for every submission
Telegram bot alerts
Discord embed notifications
Slack integration with Block Kit
Webhook POST support with HMAC signing
Zapier trigger integration
n8n webhook support
IFTTT Maker Webhooks
Notion database creation
Google Sheets row append (Pro)
Jira auto-create issues (Pro)
Airtable record addition (Pro)
AI Antispam powered by OpenAI
Submission dashboard with search and export
File upload support (Pro)
EU data residency and GDPR compliance
99.9% uptime guarantee

Who Should Use Onsubmit Dev?

Capture leads from static websites

Collect form submissions without backend infrastructure

Route form data to team communication tools

Automate issue creation from contact forms

Append survey responses to Google Sheets

Filter spam submissions with AI scoring

Integrate form data into Airtable or Notion workflows

Onsubmit Dev: Pros & Cons

✓Pros

No backend, servers, or configuration required
Instant multi-channel notifications
AI-powered spam filtering
EU data residency with GDPR compliance
99.9% uptime guarantee
Simple integration - just update form action URL
Comprehensive integration ecosystem
File upload support available
Clean submission dashboard

✕Cons

File uploads limited to Pro plan
Advanced integrations (Google Sheets, Jira, Airtable) require Pro plan
Webhook and Zapier integrations only on Basic and above

Frequently Asked Questions about Onsubmit Dev

Do I need to set up a backend server to use onsubmit.dev?

No. onsubmit.dev is serverless - simply point your HTML form's action attribute to your unique onsubmit.dev endpoint and you're ready to receive submissions.

Where can form submissions be sent?

Submissions can be sent to email, Telegram, Discord, Slack, webhooks, Zapier, n8n, IFTTT, Notion, Google Sheets (Pro), Jira (Pro), and Airtable (Pro).

Does onsubmit.dev filter spam?

Yes. AI Antispam uses OpenAI to score every submission and automatically drops high-confidence spam while flagging borderline entries for review.

Is my data GDPR compliant?

Yes. All data is stored and processed exclusively within the European Union, ensuring GDPR compliance by default.

Can I accept file uploads in my forms?

Yes, file uploads are supported on the Pro plan. Files are stored securely and accessible from your submission dashboard.