Mailgun Review 2026: Pricing, Features & Deliverability

Mailgun is a developer-focused email service for sending transactional and bulk email over both API and SMTP. Now owned by Sinch, it is a long-standing favourite of engineering teams thanks to its flexible API, granular logging and built-in email validation. This Mailgun review covers Mailgun pricing in 2026, the features that set it apart, how its deliverability stacks up, and who should choose it over Amazon SES or SendGrid. It is part of our SMTP services hub.

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What is Mailgun?

Mailgun is a cloud email-delivery platform aimed squarely at developers. You send through its REST API or via standard SMTP, and it handles delivery, logging, analytics and inbound routing. Where Amazon SES is raw infrastructure, Mailgun wraps the same job in a more developer-friendly product with better tooling out of the box — detailed logs, email validation, and a template builder. It sits between a bare sending engine and a full marketing suite: powerful for transactional and programmatic sending, but not a campaign tool for marketers. Since Sinch acquired Mailgun’s parent company, it has been folded into a larger messaging group alongside its sibling Mailjet.

Mailgun pricing in 2026

Mailgun pricing is tier-based on monthly volume, with overage charged per thousand beyond your plan. The current published plans are:

So a realistic Mailgun pricing read is around $35/month at 50,000 emails (Foundation) and $90/month at 100,000 (Scale, which bundles a dedicated IP). Extra dedicated IPs run about $59 each per month. A key thing the plans gate is log retention — one day on Basic, rising to thirty on higher tiers — which matters a lot if you rely on Mailgun’s logs for debugging. Prices have risen since the Sinch acquisition, and some third-party reports describe steeper pay-as-you-go rates; always confirm against the official Mailgun pricing page before committing.

Mailgun features and SMTP

• Send API and Mailgun SMTP relay with credentials per domain.
• Granular logs and analytics — Mailgun’s logging is a genuine strength, though retention is tier-gated.
• Built-in email validation to clean lists before you send.
• Inbound routing to parse and act on received mail.
• Suppression management, webhooks and a template builder.
• SPF, DKIM and DMARC setup plus dedicated IPs on higher tiers.

The combination of a clean API, flexible SMTP and strong logging is what keeps developers loyal to Mailgun. Setting up Mailgun SMTP is quick — add your domain, verify the DNS records, and point your app at the relay — and the validation and inbound features are useful extras that bare engines like SES leave you to build.

Mailgun deliverability

Mailgun is used by large brands and is solid for transactional mail, but its shared-IP deliverability is generally rated “average” rather than best-in-class, and independent seed tests have shown some decline in recent years. For serious or marketing-heavy sending, a dedicated IP (bundled on the Scale plan) makes a real difference. As with any provider, your own authentication and sender reputation matter more than the logo on the platform — Mailgun delivers your mail, but it cannot fix a dirty list or a misconfigured domain. Pair it with disciplined list hygiene and it performs well.

Mailgun pros and cons

• Pro — excellent API and flexible SMTP, a pleasure for developers to work with.
• Pro — granular logging and built-in validation included on paid tiers.
• Pro — scales high with inbound routing and suppression built in.
• Con — prices rose after the Sinch acquisition, weakening its budget appeal.
• Con — average shared-IP deliverability; a dedicated IP is advisable for serious sending.
• Con — reports of abrupt account suspensions and short log retention on the entry tier.

Who Mailgun is best for

Mailgun is best for developers and SaaS teams that need scriptable transactional email at volume, with strong logging, inbound routing and validation in one place. It is a poorer fit for non-technical marketers who want a campaign builder, and for very low-volume budget senders who may now find Amazon SES cheaper. If pure transactional deliverability is your priority, compare it with Postmark; if you want a marketing module alongside the API, see our SendGrid review.

Mailgun setup, logging and support

Mailgun’s onboarding is genuinely developer-friendly: you add a sending domain, publish the DNS records it generates for SPF, DKIM and tracking, and within minutes you can send through either the API or Mailgun SMTP. The part that wins teams over is the logging. Mailgun records detailed events for every message — accepted, delivered, opened, clicked, failed — and exposes them through both the dashboard and the API, which makes diagnosing a delivery problem far easier than on a bare engine. The important caveat is retention: the entry Basic plan keeps logs for only a day, and you need the higher tiers for the thirty-day retention that serious debugging requires, so factor that into which plan you choose.

Support is tiered, with 24/7 chat on paid plans, though sentiment about response quality is mixed and the most common complaint across reviews is abrupt account suspensions — Mailgun, like several providers in this space, enforces its acceptable-use policy strictly and sometimes without much warning. The practical defence is the same as with any sender: authenticate properly, keep your lists clean, and avoid the sudden volume spikes that trip automated abuse systems. Do that and most teams run on Mailgun for years without incident.

Mailgun for transactional vs marketing

It is worth being clear about what Mailgun is and is not. It is first and foremost a transactional and programmatic sending tool — receipts, notifications, password resets and app-triggered mail — with a template builder and validation bolted on. It is not a marketing platform: there is no audience-management UI, no visual customer-journey builder, and no campaign analytics of the kind a marketer expects. You can certainly send bulk mail through it, and many teams do, but you drive that from your own application or list logic rather than from a marketing dashboard. If your need is genuinely marketing-led — segmentation, automations, landing pages — an email marketing platform will serve you better, and Mailgun is best kept for the transactional layer underneath.

That positioning is exactly why Mailgun is so often compared with Amazon SES and SendGrid rather than with Mailchimp or Brevo. All three are sending engines for developers; the differences come down to price transparency, tooling depth and deliverability, which is the comparison most buyers are really making. For the broader context of where transactional services sit, see our SMTP services hub, and remember that your own authentication underpins results on any of them.

Mailgun pricing in context

Whether Mailgun pricing is competitive depends heavily on your volume and what you compare it against. At the entry level, $15 for 10,000 emails is reasonable but not cheap — Amazon SES would send the same volume for around a dollar. What you are paying the difference for is the tooling: the logging, the built-in validation, the inbound routing and the friendlier developer experience that SES leaves you to assemble yourself. At 50,000 to 100,000 emails the Foundation and Scale plans ($35 and $90) remain mid-market, and the bundled dedicated IP on Scale is a genuine value-add for senders who need one. The post-Sinch price increases have, however, eroded the bargain Mailgun once represented, which is why budget-driven developers increasingly weigh it directly against the much cheaper SES.

The fair way to frame it is value rather than headline cost. If you will actually use the logging depth, the validation and the inbound features, Mailgun pricing is justified and the convenience is real. If you only need to push transactional mail out the door and have the skills to manage the rest, SES will save you money, and Postmark will give you better transactional deliverability for a comparable or higher spend. Mailgun’s sweet spot is the team that wants more than a bare engine but does not need a full marketing suite.

The verdict on Mailgun

Mailgun remains a strong, dependable choice for developers who want a capable transactional email service with excellent logging, built-in validation and flexible SMTP, all behind a clean API. It is no longer the budget standout it once was, and its shared-IP deliverability is good rather than exceptional, so serious senders should plan for a dedicated IP and keep their authentication and list hygiene tight. Weighed against its peers, it sits comfortably between the bare-metal economy of Amazon SES and the deliverability premium of Postmark — a sensible middle path for engineering teams who value tooling and transparency. If those strengths match your needs, Mailgun is easy to recommend; if pure cost or pure deliverability is your single priority, one of its rivals will edge it.

Make your emails actually land

Whichever tool you use to send or verify, deliverability is what decides whether your email reaches the inbox — make sure these foundations are in place:

• Free Email Health Check — score your sending domain out of 100 in 30 seconds — the fastest way to see what to fix.
• Email deliverability hub — reputation, warm-up, blacklists and inbox placement.
• Gmail, Yahoo & Microsoft sender requirements — the rules bulk senders must now meet to be delivered.
• Email authentication (SPF, DKIM & DMARC) — prove your mail is really yours and stop spoofing.

Related reading

• SendGrid vs Mailgun
• Amazon SES review
• Postmark review
• SparkPost review
• Email API vs SMTP

Mailgun review: FAQ

How much does Mailgun cost?

Mailgun pricing starts at $15/month for 10,000 emails (Basic), $35/month for 50,000 (Foundation), and $90/month for 100,000 (Scale, which includes one dedicated IP). Overage is billed per thousand, and there is an ongoing free tier of 100 emails a day for testing.

Is Mailgun good for deliverability?

It is solid for transactional email and used by major brands, but shared-IP deliverability is rated average rather than best-in-class. For serious sending, use the dedicated IP bundled on the Scale plan and maintain strong authentication and list hygiene, which matter more than the provider itself.

Does Mailgun offer SMTP?

Yes. Mailgun SMTP is available alongside its API — you add and verify your domain, generate SMTP credentials, and point your application at the relay. Many teams use the API for app-triggered mail and SMTP for connecting existing tools that expect SMTP settings.

Is Mailgun free?

Mailgun has an ongoing free tier of 100 emails per day, intended for testing and development rather than production sending. For any real volume you move to a paid plan starting at $15/month, and the free tier is best thought of as a sandbox for trying the API and SMTP integration before you commit.

Mailgun or SendGrid?

Both are developer-first transactional services with similar deliverability. Mailgun offers transparent volume pricing and strong logging and validation; SendGrid adds a marketing module and Twilio integration. For a detailed breakdown see our SendGrid vs Mailgun comparison.

Who owns Mailgun?

Mailgun is owned by Sinch, the cloud communications company, which acquired its parent in 2022. It is now part of the same group as Mailjet, and is sometimes branded “Sinch Mailgun.” The acquisition brought price increases but also continued investment in the platform, so the long-term roadmap looks stable even if the bargain pricing of its independent days has faded.