Freesend is a lightweight email API built for developers who want full control over email delivery without the complexity or cost of third-party platforms.
Hosted at freesend.metafog.io, it lets you send emails through a simple HTTP API using your own SMTP provider (like Gmail, Zoho, Mailgun, etc.).
Designed with serverless apps, indie hackers, and backend engineers in mind, Freesend lets you send emails through a simple HTTP API — powered entirely by your own SMTP server (like Gmail, Zoho, Mailgun, etc.).
No vendor lock-in. No usage caps. No surprise pricing.
"I needed to send 1-2k emails/day from my serverless app. Freesend just worked — and saved me time and money."
~ A real user
Most email platforms either:
- Limit you to a few hundred free emails per month
- Charge a premium for usage-based pricing
- Lock you into their infrastructure
Freesend flips that model:
✅ Use Your Own SMTP
✅ Simple HTTP API
✅ Free & Open Source (and you don't need to self-host!)
Ideal for:
- Serverless apps that need reliable transactional emails
- Startups who want full transparency & control
- Developers who value simplicity and clean open-source code
- ⚡ Easy HTTP API - Send email with just one
POSTrequest - 📬 Full SMTP Control - Bring your own Gmail, Zoho, Outlook, or custom SMTP
- 📀 Attachments Support - Send PDFs, images, etc. via base64
- 🧠 Intuitive Schema - Clean field names (
fromName,fromEmail, etc.) - 🧑💻 Minimal & Hackable - Fully open source and easy to extend
- 💬 Plain Text + HTML - Support for both formats out of the box
Use our hosted Freesend instance right now:
https://freesend.metafog.io/api/send-email
const sendEmail = async () => {
const url = "https://freesend.metafog.io/api/send-email";
const apiKey = "YOUR_API_KEY"; // Get one at https://freesend.metafog.io
const emailData = {
fromName: "Your Company",
fromEmail: "hello@yourdomain.com",
to: "user@example.com",
subject: "Hello from Freesend!",
html: "<h1>Welcome!</h1>",
text: "Welcome!",
};
const res = await fetch(url, {
method: "POST",
headers: {
"Content-Type": "application/json",
"Authorization": `Bearer ${apiKey}`,
},
body: JSON.stringify(emailData),
});
const result = await res.json();
console.log(result);
};
sendEmail();- Seamlessly send transactional emails from your JAMstack or serverless app — signups, OTPs, receipts & more
- Use Gmail SMTP to avoid setting up Postfix or Mailgun
- Replace expensive email APIs with your own hosted function
- Maintain full data ownership of your outbound emails
Freesend is growing because of awesome developers like you! If you're interested in:
- Improving the UI / UX
- Implementing new features
- Adding templating support
...open a PR or drop a discussion! 💬
- grovv.app – A spreadsheet‑powered sales CRM for SMBs that uses Freesend to send transactional emails.
- mar.toolhub.live – A certificate generation platform for MAR point submissions, using Freesend to deliver 1,000–2,000 official, QR-verified emails daily via Gmail SMTP.
Want to be listed? Open a PR!
This project is licensed under the MIT License.