Why developers look for Mailgun alternatives
- Pricing complexity — Mailgun's tiered pricing with per-email charges, add-ons for validation, and feature gates makes cost prediction difficult
- Corporate ownership — since the Sinch acquisition, Mailgun feels less developer-focused and more enterprise-oriented
- Dated dashboard — the UI hasn't kept pace with modern alternatives
- No campaign support — Mailgun focuses on transactional email; marketing campaigns require a separate tool
- Trial limitations — the free trial is time-limited rather than a permanent free tier
RelayPost vs Mailgun: Feature comparison
| Feature | RelayPost | Mailgun |
|---|---|---|
| REST API | Yes (JSON) | Yes (form-encoded + JSON) |
| SMTP relay | Yes | Yes |
| Transactional email | Yes | Yes |
| Campaign email | Yes (all plans) | No |
| Email validation | No (use third-party) | Yes (paid add-on) |
| DKIM/SPF authentication | Automatic | Manual setup |
| Real-time webhooks | Yes | Yes |
| Suppression management | Automatic | Yes |
| Free tier | 1,000/mo (permanent) | 100/day (trial period) |
| Team members | Unlimited | Limited by plan |
Pricing comparison
| Volume | RelayPost | Mailgun |
|---|---|---|
| 1,000/mo | Free | Trial only |
| 10,000/mo | $5/mo | $15/mo (Foundation) |
| 100,000/mo | $25/mo | ~$75/mo (Scale) |
Mailgun pricing varies by plan tier and add-ons. Check their pricing page for current rates.
When Mailgun might be the better choice
- You need built-in email validation as part of your sending workflow
- You require Mailgun's email parsing (inbound routing) features
- Your organization needs enterprise contracts and SLAs backed by Sinch
- You're already deeply integrated with Mailgun's API and migration cost is high
Frequently asked questions
Why switch from Mailgun to RelayPost?
Mailgun's pricing tiers are complex with per-email charges, validation add-ons, and feature gates. RelayPost offers flat monthly plans with generous included volume. The Pro plan is $25/mo for 100K emails — no surprise charges.
Does RelayPost support email validation like Mailgun?
RelayPost doesn't include a built-in email validation API. However, automatic suppression management handles bounces and complaints, which covers the most important deliverability protection. For pre-send validation, you can integrate a third-party service.
How does RelayPost's API compare to Mailgun's?
RelayPost uses a standard JSON REST API. Mailgun uses a form-encoded API by default (though they also support JSON). RelayPost's API is simpler — send an email with a single POST request using fetch() in any language.
Can I use RelayPost for high-volume sending?
Yes. The Pro plan includes 100K emails/mo with $0.80/1K overage. For volumes above 500K/mo, contact us for custom pricing with dedicated infrastructure.
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