Free Email APIs in 2026
Sending transactional email (welcome emails, password resets, order confirmations) is a core requirement for most apps. The good news: several APIs offer free tiers that are generous enough for development, testing, and even small production workloads.
Here's how the main options compare in 2026.
Comparison Table
| Provider | Free Limit | What's Included | Extras | |----------|-----------|-----------------|--------| | LANGR | 100 req/day | Email + SMS + Auth + Payments + SEO + Content + i18n | 7 services in one API | | Resend | 100 emails/day | Email only | React Email templates | | SendGrid | 100 emails/day | Email only | Marketing campaigns | | Mailgun | 100 emails/day (1 month trial) | Email only | Email validation | | Amazon SES | 62,000/month (from EC2) | Email only | AWS ecosystem |
LANGR: More Than Email
What makes LANGR different is that the free tier isn't just email — it's 100 requests/day across all services. That means you can:
- Send transactional emails
- Send SMS messages and OTP codes
- Authenticate users with magic links or Google OAuth
- Process payments via Stripe
- Generate AI content
- Translate text to 120+ locales
All with one API key, one SDK, one set of documentation.
Quick Start with LANGR
npm install @langr/sdk
import { LangrClient } from "@langr/sdk";const langr = new LangrClient({ apiKey: "lk_live_..." });
await langr.mail.send({
from: "[email protected]",
to: "[email protected]",
subject: "Your order is confirmed",
html: "<h1>Order #12345 confirmed</h1><p>Ships in 2 days.</p>",
});
Sign up takes 10 seconds. No credit card required. No domain verification required for testing.
When to Upgrade
The free tier (100 requests/day) works well for:
- Development and testing
- Side projects with low traffic
- Prototyping before committing to a vendor
When you're ready for production, the Pro plan ($49/month) gives you 10,000 requests/day across all services — still cheaper than running Twilio + SendGrid + Auth0 separately.
How to Choose
Choose LANGR if you need more than just email. The unified API saves integration time and reduces vendor complexity.
Choose Resend if you only need email and want the simplest possible developer experience.
Choose SendGrid if you need email marketing features alongside transactional email.
Choose Amazon SES if you're already in the AWS ecosystem and need high volume at minimal cost.
Get Started
1. Sign up for free — no credit card required
2. Install the SDK: npm install @langr/sdk
3. Read the docs