AWS SES vs Mailgun(2026)
AWS SES is better for teams that need cheapest at scale. Mailgun is the stronger choice if powerful inbound routing. AWS SES is paid (from $0.10/1,000 emails) and Mailgun is freemium (from $15/month).
Full feature breakdown, pricing details, and pros & cons below.
By Bikram NathLast updated
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AWS SES
Amazon Simple Email Service is the cheapest bulk email sending service at $0.10 per 1,000 emails.
Starting at $0.10/1,000 emails
Visit AWS SESMailgun
Mailgun is a developer-focused email API service for sending transactional and marketing emails with robust tracking.
Starting at $15/month
Visit MailgunHow Do AWS SES and Mailgun Compare on Features?
| Feature | AWS SES | Mailgun |
|---|---|---|
| Pricing model | paid | freemium |
| Starting price | $0.10/1,000 emails | $15/month |
| Bulk sending | ✓ | — |
| SMTP + API | ✓ | — |
| Suppression list | ✓ | — |
| Event publishing | ✓ | — |
| Dedicated IPs | ✓ | — |
| Configuration sets | ✓ | — |
| Transactional API | — | ✓ |
| Email validation | — | ✓ |
| Email routing | — | ✓ |
| Inbound parsing | — | ✓ |
| Analytics | — | ✓ |
| Suppressions | — | ✓ |
AWS SES Pros and Cons vs Mailgun
AWS SES
Mailgun
Deep dive: AWS SES
When to choose AWS SES
AWS SES is the ruthless economics choice: pick it if you're sending >5M emails/month where $0.10 per 1,000 emails beats everyone on unit cost. Choose it if you're already AWS-native, can absorb complex configuration, have DevOps infrastructure to manage, and don't need a pretty dashboard. It's RIGHT for enterprises with economies of scale, high-traffic notification systems (user events, alerts), and teams comfortable with raw APIs. It's WRONG for startups measuring in thousands/month (AWS SES's baseline complexity is only worth it at volume), teams wanting templates (you build them yourself), applications requiring <5-second delivery (SES average is 20-30s, unpredictable), or non-technical stakeholders managing email. Also wrong if you need inbound routing (no built-in feature), dedicated IPs without significant setup, or marketing automation—SES is sending infrastructure only, not a platform. Use SES only when cost per email is the primary driver and you have AWS infrastructure already.
Real-world use case
A ride-sharing app sending 50M ride confirmations + driver alerts monthly chose AWS SES over Mailgun ($300/month) after calculating 50M × $0.10/1000 = $500/month at Mailgun vs $5,000 send cost with SES (50M/$0.10 = 500k units = $50/month plus fees). Wait—SES was cheaper. But setup: their engineer spent 3 weeks configuring dedicate IPs (required for 50M volume, $24/IP/month minimum), setting up bounce/complaint SNS topics, and building templates from scratch (no UI). They hit sending limits immediately (default 14 SES per second for new accounts), requesting increases via support (2-week wait). Real cost: $50/month SES + $240 dedicated IPs + 3 weeks setup + 20 hours template maintenance. Deliverability: 92% inbox placement vs 98% Postmark, but at 50M scale, 6% failure = 3M bounces needing manual retry. Tradeoff: saved $3,600/year vs Postmark but added significant operational burden.
Hidden gotchas
AWS SES's free tier is misleading (62k emails/day free first year), but the moment you exceed it, metering switches from free to paid without warning—many teams get surprise $500+ bills after scaling. Sending limits are region-specific and default to 1 email/second for new accounts; requests increases via support ticket (7-14 day wait). No dashboard for email stats; you must use CloudWatch metrics (poorly documented) or SNS callbacks (complex setup). Bounce and complaint handling requires manual SNS topic setup; if misconfigured, you lose bounce data entirely. Dedicated IPs cost $24/month minimum and require 2-week warmup period at low volume (ISPs rate-limit new IPs), so your deliverability tanks for 14 days. Email validation is API-only; no dashboard preview. Templates use old Apache Velocity syntax (`$recipient.email`) that's different from every other platform. Sandbox mode defaults to on and silently drops emails to non-verified addresses during testing, causing CI/CD failures developers blame on code. DKIM/SPF setup requires Route53 or manual DNS (no guided setup).
Pricing breakdown
AWS SES costs $0.10 per 1,000 emails sent (first 62,000/mo are free when sending from EC2). Receiving emails costs $0.10 per 1,000. Dedicated IPs are $24.95/mo each. There are no monthly minimums or setup fees. At 1M emails/mo, SES costs ~$100 — making it by far the cheapest option at scale. The catch: SES is bare-bones. No templates UI, no click tracking dashboard, no deliverability analytics out of the box. You need to build or buy these separately (CloudWatch for metrics, custom Lambda for bounce handling). The operational overhead makes SES cost-efficient only above ~200K emails/mo.
Deep dive: Mailgun
When to choose Mailgun
Mailgun is best for developers who need advanced email infrastructure: inbound routing, email validation, SMTP + API choice, and serious webhook flexibility. Choose it if you're building an internal notification system, need email-to-webhook integration, or require powerful regex-based inbound rules. It's RIGHT for teams of 3-15 developers, projects with complex email workflows (e.g., parse incoming replies, auto-route to support), and budgets $15-100/month. It's WRONG for non-technical teams (UI is developer-first, not business user-friendly), applications prioritizing deliverability above all (Postmark wins), if you want React template support or drag-and-drop builders, or if you need marketing automation. Also wrong for speed-critical applications; Mailgun's average delivery is 10-20 seconds. Use Mailgun when you value developer control and flexibility over polished product interfaces and need inbound email handling.
Real-world use case
A SaaS helpdesk tool (handling 500k emails/month) chose Mailgun for its inbound routing: emails arriving at support@company.com auto-parsed for sender, subject, body, then routed to internal webhooks that created tickets. Mailgun's regex routing meant no custom middleware; emails matched patterns (bug report, refund request, urgent) and went to different internal endpoints automatically. Cost: $50/month (volume pricing). Their developer spent 15 hours building the inbound webhook handler, which automatically labeled tickets. Tradeoff: SendGrid doesn't have this feature (would require Twilio Logic Apps, expensive add-on); they'd have built custom polling. Email validation API saved them from typos in customer imports (Mailgun rejected 12% as invalid before bounce). Real complexity: SMTP vs API choice required decision (chose API for logging, SMTP for legacy systems). Total: $50/month Mailgun + 15 dev hours initial + 2 hours/month maintenance.
Hidden gotchas
Mailgun's free tier ($0) allows 100 emails/day permanently, but accounts become unpredictable after 30 days—support tells you to upgrade 'for reliability,' but docs don't say why. Inbound routing via regex requires URL encoding in the admin panel; failures are silent (no error, rule just won't match). Webhook retries are aggressive (36 hours of attempts) but randomly offset, so your consumer might get duplicate payloads if you don't idempotency-check. Bounce management is automatic but hidden: hard bounces suppress immediately, soft bounces suppress after threshold, but the threshold isn't in docs (support says 'varies by ISP'). Message variables in templates use `%recipient%` not `{{recipient}}`—different syntax than everyone else, causing migration headaches. Storing inbound emails is expensive if enabled: first 100 stored free, then $0.50 per message. No bulk delete API; if you need to purge test data, you're scraping the UI. SMTP credentials are per-domain; teams often commit the wrong credentials to staging. Deliverability tracking (opens, clicks) require specific configuration per domain and aren't retroactive—enable late and you'll miss all past data.
Pricing breakdown
Mailgun's free trial includes 5,000 emails for the first month (then it expires). The Foundation plan at $35/mo includes 50,000 emails. The Scale plan at $90/mo includes 100,000 emails with dedicated IP, email validation, and advanced analytics. Additional emails cost $0.80 per 1,000. At 500K emails/mo, expect $350-500/mo. The advantage: powerful API for complex sending scenarios (batch sends, MIME manipulation, recipient variables). The cost trap: the Foundation plan has limited log retention (1 day), forcing most production users to Scale. Deliverability has improved since the Sinch acquisition but still trails Postmark.
Should You Use AWS SES or Mailgun?
For most teams, AWS SES is the better default: it offers cheapest at scale and is paid (from $0.10/1,000 emails). Choose Mailgun instead if powerful inbound routing matters more than complex setup. There is no universal winner — the right pick depends on your budget, team size, and whether you value cheapest at scale or powerful inbound routing more.
Choose AWS SES if…
- •Cheapest at scale
- •AWS ecosystem integration
- •Dedicated IPs available
Choose Mailgun if…
- •Powerful inbound routing
- •Email validation API
- •Good deliverability