Infrastructure depth versus test-first simplicity
Mailgun and Mailtrap sit in the same category on review sites, but you feel the difference quickly when you look at their dashboards.
Mailgun is infrastructure. Its plans talk about routes, validations, IP pools, domains, SSO and retention. It is used by products that send for many customers, receive email as part of their features, or need control over sending reputation. It has been doing this for more than ten years and is now part of Sinch.
Mailtrap is a developer workflow tool. Its best-known product is the sandbox, which catches every email your staging environment sends so you can inspect it safely. Its sending product is straightforward: pick a volume, verify a domain, send over API or SMTP, read the logs.
Plans that cover 100,000 emails
| Mailgun | Mailtrap | |
|---|---|---|
| Free | 100 emails a day, 1 day of logs | 4,000 emails a month (150 a day), 3 days of logs |
| Entry | Basic $15 for 10,000 (1 domain, 1 day of logs) | Basic $15 for 10,000 (5 domains, 5 days of logs) |
| 50,000 emails | Foundation $35 (1,000 domains, 5 days of logs) | Basic $20 |
| 100,000 emails | Scale $90 (IP pools, 30 days of logs, 5,000 validations) | Basic $30, or Business $85 with a dedicated IP |
| Overage | From $1.80 per 1,000 on Basic, down to $1.10 on Scale | Varies by tier, capped |
The comparison depends on whether you need a dedicated IP. If you do, the two are within $5 of each other at 100,000 emails, and Mailgun's Scale plan includes more: validations, longer logs, SSO and send time optimization. If you do not, Mailtrap Basic is a third of the price.
Features only one of them has
Mailgun only:
- Inbound routes. Mailgun can receive email for your domain, parse it and post it to your app. Reply-by-email in a support tool or comment system usually relies on this.
- Validation. Check addresses at signup or before a large send to cut bounces.
- Scale for platforms. Foundation allows up to 1,000 sending domains, which suits SaaS products that send on behalf of their customers.
Mailtrap only:
- A real QA inbox. Staging and test environments send to Mailtrap, and QA reviews each message's HTML, headers, spam analysis and links before release. Mailgun's sandbox domain helps you test sending, but it is not an inbox for reviewing every message.
- A generous free tier. 4,000 emails a month is enough for many side projects and early apps.
Operational differences you will notice later
- Support tickets. "Did this customer get the email?" is answered by logs. Mailgun Basic keeps one day, which is often too short. Mailtrap Basic keeps five. At the Scale level Mailgun keeps 30.
- Multiple environments. Mailtrap separates testing and sending into different products, which makes it hard for staging to email real users by mistake. With Mailgun, teams usually use separate domains or API keys per environment.
- Reputation control. Mailgun's IP pools on Scale let you separate traffic types. Mailtrap offers a dedicated IP on Business.
Cutover checklist
- DNS. Add SPF, DKIM and tracking records for the new provider and keep DMARC aligned.
- Credentials. Replace API keys or SMTP settings in each environment; update SDKs.
- Templates. Move Mailgun-hosted templates into code or the new provider.
- Suppressions. Export bounces, complaints and unsubscribes and import them.
- Webhooks. Map event payloads for delivered, bounced, opened, clicked and complained.
- Inbound and validation. If leaving Mailgun, confirm replacements for routes and validation before switching, or keep Mailgun for those only.
- Gradual ramp. Move a share of traffic first and watch bounce and complaint rates, especially on a new dedicated IP.
Which team is each built for
Mailgun suits a platform team that treats email as infrastructure: separate domains per customer, inbound routes feeding product features, validation in the signup flow and IP pools per traffic type. The dashboard and docs assume you are comfortable with DNS, webhooks and deliverability terms.
Mailtrap suits a product team that wants email to work without much ceremony: a QA inbox during development, one or a few sending domains, and logs when something goes wrong. It is easier to adopt, and its pricing is easier to predict at modest volume. If you expect to grow into Mailgun's features, you can still start with Mailtrap's sandbox, since it works alongside any production sender.
The Sinch family and the testing gap
Mailgun is part of Sinch, which acquired its parent group Pathwire in 2021. That group also includes Mailjet, a marketing and sending platform, and Email on Acid, a tool for previewing emails across clients and checking them before sending. So when people say Mailgun lacks Mailtrap's QA tools, the fuller answer is that Sinch sells that capability as a separate product.
Mailtrap, built by Railsware, keeps testing and sending under one brand, though still as separate plans. For a small team, one vendor for both is simpler. For a larger organization already buying from Sinch, Mailgun plus Email on Acid may fit existing contracts.
A worked example: growing from 30,000 to 150,000 emails
Pricing paths differ as an app grows.
- At 30,000 emails a month, Mailgun Foundation at $35 (50,000 included) and Mailtrap Basic at $20 (50,000 tier) both fit. Mailtrap is cheaper; Mailgun adds 1,000 domains and inbound routing.
- At 100,000 emails, Mailgun Scale is $90 and Mailtrap Basic $30, or Business $85 with a dedicated IP.
- At 150,000 emails, Mailgun Scale plus 50,000 extra at $1.10 per 1,000 comes to about $145. Mailtrap Basic stops at 100,000, so you move to Business, which starts at $85 for 100,000 and lists $200 for 250,000.
The pattern: Mailtrap is cheaper at low and middle volume, while Mailgun's per-email overage on Scale stays predictable as you grow.
Support and escalation
When email breaks, support matters. Mailgun includes phone and chat support on Scale, which is one reason larger senders choose it. Lower Mailgun plans rely more on tickets. Mailtrap reserves priority support for Enterprise and serves lower plans through its standard channels.
Log retention also affects support. With Mailgun Basic's single day of logs, investigating a customer complaint from last week is often impossible. Budget Foundation or Scale if support teams need history.
Use-case matchups
| Situation | Better fit | Why |
|---|---|---|
| App with reply-by-email or ticket intake | Mailgun | Inbound routes parse email into webhooks |
| Team that wants QA to review every email | Mailtrap | Sandbox inboxes with HTML and spam checks |
| Platform sending for hundreds of customer domains | Mailgun | Up to 1,000 domains on Foundation |
| Startup sending under 100,000 emails a month | Mailtrap | Basic from $15, $30 at 100,000 |
| Signup flow that rejects bad addresses | Mailgun | Built-in email validation |
| Dedicated IP at around 100,000 emails | Tie | Mailgun Scale $90, Mailtrap Business $85 |
| SaaS onboarding and billing sequences | Sequenzy | Lifecycle email with billing triggers |
Where Sequenzy fits
Sequenzy is not an inbound parsing service, a validation API or a staging sandbox, so it does not replace those parts of Mailgun or Mailtrap.
What it adds is the layer neither provides: lifecycle email. Sequenzy sends transactional email over API or SMTP and runs campaigns, segments and visual sequences in the same account. It connects to Stripe, Paddle and Polar so billing events trigger email, and its plans include unlimited contacts. At 100,000 emails a month, its closest plan is $99/month for 120k emails, which costs more than a bare sending API because it replaces the separate marketing tool most teams add.
The short answer for engineering teams
Choose Mailgun for inbound email, validation, many domains, IP pools and longer logs. Choose Mailtrap for a staging sandbox and the cheapest route to 100,000 emails a month. If what you really need is onboarding, billing and marketing email in one place, compare Sequenzy.
Decision checklist
- Choose Mailgun if you need inbound routing, validation or many sending domains.
- Choose Mailtrap if staging safety and low prices under 100,000 emails matter most.
- Compare Mailgun Scale with Mailtrap Business if you need a dedicated IP.
- Avoid Mailgun Basic if support needs more than one day of logs.
- Model volume a year ahead; Mailtrap Basic ends at 100,000 emails.
- Consider Email on Acid alongside Mailgun if you need client previews from the same vendor group.
- Consider Sequenzy if the real gap is lifecycle email rather than delivery.
