Free Transactional Email: Best Services with Free Plans (2026)
Find the best free transactional email services. Compare free tiers, sending limits, features, and setup for order confirmations, password resets, and more.
Transactional emails — order confirmations, password resets, shipping notifications — are critical to your business but should not cost a fortune. Several providers offer generous free tiers that handle transactional email needs for most small to medium businesses.
Free Transactional Email Providers Compared
| Provider | Free Limit | API | SMTP | Authentication | Best For |
|---|---|---|---|---|---|
| Brevo | 300/day (9K/month) | REST API | Yes | SPF, DKIM, DMARC | Most businesses |
| Amazon SES | 62K/month | AWS SDK | Yes | Full | AWS-hosted apps |
| SendGrid | 100/day (3K/month) | REST API | Yes | Full | Developer apps |
| Mailjet | 200/day (6K/month) | REST API | Yes | Full | European businesses |
| Postmark | 100/month | REST API | Yes | Full | Speed-critical apps |
Why Brevo Is the Best Free Option
- Highest free limit among easy-to-setup services: 300 emails/day
- No credit card required for the free plan
- Both SMTP and REST API included
- Full authentication support: SPF, DKIM, DMARC
- Real-time analytics: Delivery, opens, clicks
- Same platform for marketing: Add campaigns and automation when ready
- WordPress integration: WP Mail SMTP compatible
Types of Transactional Emails
| Type | Trigger | Delivery Expectation |
|---|---|---|
| Order confirmation | Purchase completed | Under 2 minutes |
| Shipping notification | Order shipped | Under 5 minutes |
| Password reset | User request | Under 30 seconds |
| Account verification | Registration | Under 1 minute |
| Invoice/receipt | Payment processed | Under 2 minutes |
| Account alerts | Security events | Under 1 minute |
For examples and templates, see our transactional email guide.
Setup: Brevo Free Transactional Email
Via SMTP
Host: smtp-relay.brevo.comPort: 587Username: Your Brevo login emailPassword: Your SMTP key (from Settings > SMTP & API)Encryption: TLSVia REST API
Use the Brevo API with your API key for programmatic sending. Libraries available for Python, Node.js, PHP, Ruby, and more.
For WordPress
Install WP Mail SMTP and configure with Brevo credentials. See our WordPress SMTP guide for step-by-step instructions.
When to Upgrade from Free
| Signal | Action |
|---|---|
| Hitting daily send limit regularly | Upgrade to Brevo Starter ($9/month) |
| Need dedicated IP | Upgrade to Business plan |
| Require advanced analytics | Upgrade for detailed reporting |
| Sending 50K+/month | Consider Amazon SES for cost savings |
| Need guaranteed delivery speed | Consider Postmark |
Best Practices
- Separate transactional from marketing — different sending reputation
- Set up authentication — SPF, DKIM, DMARC
- Monitor delivery rates — should be 99%+ for transactional
- Design mobile-first — 60%+ of emails read on mobile
- Test across email clients — Gmail, Outlook, Apple Mail
- Keep promotional content minimal — transactional emails should be primarily informational
For a complete guide to transactional email, see what is transactional email and our SMTP guide.