SMTP2GO vs Mailgun
A detailed comparison to help you choose between SMTP2GO and Mailgun.
Quick Verdict
3.9/5
SMTP2GO
0 reviews
3.7/5
Mailgun
0 reviews
SMTP2GO is rated higher (3.9 vs 3.7). SMTP2GO is an SMTP relay service with a 99.99% uptime guarantee. 1,000 free emails/month, detailed reporting, bounce management, and Australian-founded reliability focus. Mailgun is a developer-focused email API service owned by Sinch. Inbound email parsing, email validation API, and detailed analytics. Popular for startups building email features into their apps.
SMTP2GO SMTP relay with a 100% delivery SLA (deliver or refund), free tier from 1,000 emails/month | Mailgun Email API for developers — by Sinch | |
|---|---|---|
| Overview | ||
| Rating | 3.9 (0 reviews)✓ | 3.7 (0 reviews) |
| Pricing model | freemium | freemium |
| Starting price | Free tier available | Free tier available |
| Best for | Small businesses and developers needing reliable transactional SMTP relay with strong reporting, a real free tier, and a delivery guarantee behind it | Developers and SaaS teams sending transactional email from applications who also need inbound email parsing, validation, and deliverability tooling |
| Features | ||
| IPv6 | ||
| DDoS protection | ||
| Automated backups | ||
| Snapshots | ||
| Managed option | ||
| Bare metal | ||
| GPU available | ||
| S3-compatible | ||
| Hourly billing | ||
| Free tier | ||
| Tags | ||
| Tags | free tierapi access | free tierapi access |
| Visit SMTP2GO → | Visit Mailgun → | |
SMTP2GO
Pros
- + Permanent free plan: 1,000 emails/month with no time limit
- + 100% delivery SLA in the terms (deliver or refund) plus 30-day money-back guarantee
- + Multi-region routing with best-path selection across ~10 locations in US/EU/APAC
- + Deliverability tooling included on all plans: DKIM/SPF automation, feedback loops, blacklist and spamtrap monitoring
- + Clear real-time reporting and bounce/spam tracking; 20-year operating history, bootstrapped
Cons
- - Dedicated IP requires the $75 Professional tier — a steep jump from Starter
- - Professional overage bills above the in-plan per-message rate
- - Free plan limits: 200/day, 25/hour until domain verification, 5 days reporting, ticket support only after 14 days
- - Reporting retention short by default (30 days); longer storage is a paid add-on
- - Scale ceiling versus the large API platforms at tens of millions of emails per month
Mailgun
Pros
- + Inbound email parsing on every plan, including Free — the strongest developer-side feature in this category
- + Published four-tier pricing with explicit overage rates ($15/$35/$90 per month tiers)
- + Credit-backed 99.99% availability SLA on API, SMTP, and outbound delivery
- + US or EU (Ireland) sending regions per account, with GDPR/HIPAA/SOC/ISO 27001 compliance paperwork
Cons
- - One day of log retention on Free and Basic — debugging old delivery issues is impossible without exporting logs
- - Chat and phone support only on the $90/month Scale tier; support quality under Sinch ownership draws community criticism
- - Dedicated IPs cost extra below high volumes (third-party listings quote ~$59/IP/month)
- - US operating entity under a Swedish parent — CLOUD Act exposure remains for privacy-sensitive EU buyers
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