Mailgun
by Sinch AB
Transactional email API from Sinch with SMTP relay, inbound routing, email validation, and deliverability analytics. Mailgun is a transactional email service originally founded in 2010 and acquired by Rackspace in 2012. Mailgun was spun out as an independent company in 2017 and acquired by Sinch AB in 2021 for approximately $273 million.
Key Facts
pricing
| Attribute | Value | As of | Source |
|---|---|---|---|
| Mailgun pricing (July 2026) | Mailgun pricing (verified July 2026): Free ($0, 100 emails/day), Basic $15/mo (10,000 emails), Foundation $35/mo (50,000, 5,000 validations), Scale $90/mo (100,000), Enterprise custom (250,000+). SMTP + REST API and inbound routing on all paid plans; a dedicated IP is $60/mo. There is no permanent free tier beyond the 100/day plan and a first-month-free on Foundation/Scale. | Jul 2026 | Mailgun pricing |
General
| Attribute | Value | As of | Source |
|---|---|---|---|
| Founded | 2010 (acquired by Sinch 2021 for $273M) | Apr 2026 | Sinch press release |
| Parent Company | Sinch AB (Nasdaq Stockholm: SINCH) | Apr 2026 | Sinch |
| Foundation | $35/month (Foundation, 50,000 emails) | Jul 2026 | Mailgun Pricing |
| Growth | Growth tier retired; as of July 2026 the $35/month 50,000-email plan is named Foundation (entry tier: Basic $15/month, 10,000 emails) | Jul 2026 | Mailgun Pricing |
| Scale | $90/month (Scale, 100,000 emails) | Jul 2026 | Mailgun Pricing |
| Dedicated IP | Dedicated IP $59/IP/month (add-on); one dedicated IP included with Foundation 100k, Growth, and Scale plans | Jul 2026 | Mailgun Pricing |
| Inbound Parsing | Inbound email parsing to webhook events | Jul 2026 | Mailgun Documentation |
| Validation API | Email validation API to reduce bounce rates | Jul 2026 | Mailgun Validate |
Pricing Plans
Free
Free plan; 100 emails/day cap
- ✓SMTP + REST API
- ✓1 custom domain
- ✓1 inbound route
- !100 emails/day
Basic
$15/mo, billed monthly; 10,000 emails/mo included, overage $1.80/1,000
- ✓SMTP + REST API
- ✓Inbound routing (5 routes)
- ✓No daily send cap
- !10,000 emails/mo
- !1 custom domain
- !Validations pay-as-you-go
Foundation
$35/mo, billed monthly; first month free; 50,000 emails/mo included
- ✓Email template builder
- ✓Suppression management, webhooks
- ✓5-day log retention
- !50,000 emails/mo
- !Validations pay-as-you-go
Scale
$90/mo, billed monthly; first month free; 100,000 emails/mo included; extra dedicated IPs $59/IP/mo
- ✓5,000 email validations included
- ✓One dedicated IP included
- ✓SAML SSO, 30-day log retention
- ✓Phone and chat support
- !100,000 emails/mo
Enterprise
Custom pricing for high-volume senders (contact sales)
- ✓Dedicated support (TAM)
- ✓Custom volume pricing
About Mailgun
Mailgun is a transactional email service originally founded in 2010 and acquired by Rackspace in 2012. Mailgun was spun out as an independent company in 2017 and acquired by Sinch AB in 2021 for approximately $273 million. As of April 2026, Mailgun is a primary transactional email brand within the Sinch Mailgun Group, which also includes Mailjet.
The platform provides SMTP relay and REST API for sending transactional email (password resets, receipts, notifications), inbound email parsing (converting incoming messages to webhook events), email validation to reduce bounce rates, and detailed analytics on deliveries, opens, clicks, bounces, and complaints. Mailgun offers dedicated IPs on paid tiers, custom SPF and DKIM configuration, and suppression list management for compliance with unsubscribe and complaint handling.
Mailgun pricing is volume-based. As of July 2026 the Basic plan starts at $15/month for 10,000 emails, Foundation at $35/month for 50,000 emails, and Scale at $90/month for 100,000 emails, and custom pricing above 250,000 emails. All plans include the core send API, inbound routing, and basic analytics. Dedicated IP costs an extra $59/month per IP (one included on Foundation 100k and higher plans, July 2026). Mailgun also offers a free trial of 100 emails/day for 30 days; there is no permanent free tier as of April 2026.
Mailgun integrates with Zapier, Make, Shopify, WordPress (SMTP plugins), and provides SDKs for Node.js, Python, Ruby, PHP, Go, Java, and .NET. The platform is commonly used as the email backend for SaaS applications and developer-facing tools.
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Questions About Mailgun
What does the Resend free tier include in 2026?
As of July 2026, the Resend free tier includes 3,000 emails/month, 100 emails/day, one verified domain, 30-day email log retention, and basic webhooks. It is intended for development, testing, and very small production sends; teams typically upgrade to the $20/month Pro plan (50,000 emails/month, multiple domains, audiences) once they exceed the 100-emails/day cap. The next step up is Scale at $90/month (100,000 emails, dedicated IP available). Resend's appeal is developer experience — React email templates and modern SDKs — rather than the free tier being the largest in the category.
How do you migrate from SendGrid to Resend in 2026?
A SendGrid-to-Resend migration in 2026 follows five steps: verify domains in Resend, port templates (Resend recommends React Email), swap the API client in code, run dual-send for a verification window, and update DNS to point all sending traffic to Resend. Most production migrations take 1-2 weeks end to end.
What's the difference between Resend, SendGrid, and Postmark?
Resend is a React-template developer-first email API from 2023 with 3,000 free emails/month and $20/month for 50K. SendGrid is the high-scale market leader from 2009 (Twilio) with marketing plus transactional from $19.95/month. Postmark is the deliverability specialist from 2010 (ActiveCampaign) for transactional-only at $15/month for 10K.
Can you use Mailgun for marketing email in 2026?
Yes, but with caveats. As of April 2026, Mailgun (Sinch) supports marketing email via separate IP pools and the Mailing Lists feature, but lacks the visual journey builder, segmentation, and template editor of dedicated marketing platforms. Most teams pair Mailgun with a marketing tool like Mailchimp or Klaviyo rather than running campaigns directly.