Mailgun vs Postmark
We give Mailgun a 2.4 GPA and Postmark a 2.2, out of 4.0. Mailgun grades higher on value for money. They get the same grade on the free plan, features, ease of use and platforms.
Price, platforms and features side by side. The table says where each price was read and when.
Mailgun
Email API and SMTP relay for developers, with list validation
Postmark
Transactional email API and SMTP, with broadcasts on a separate stream
How we grade them
| 2.4GPAMailgunFair | 2.2GPAPostmarkFair | |
|---|---|---|
| Value for money | CGraded on 50,000 emails a month: Foundation is $35 at that volume, toward the dear end of this category, with the first month free. Basic is cheaper but stops at 10,000 emails, 1 domain and 1 day of logs. A dedicated IP means Scale at $90. | DGraded on 50,000 emails a month: $55 on Basic or $60.50 on Pro, billed monthly only. That's the dearest in this category at that volume, roughly twice the middle. Bootstrapped companies can ask for $75 of credit, which helps a bit. |
| Free plan and trial | CFree for good: 100 emails a day through the API or SMTP, with 1 domain, 1 inbound route and 1 day of logs. Enough to build against, not to run a live app on. There's also a 30-day trial of Foundation and Scale. | CA free developer plan that never expires and needs no card, but it's 100 emails a month with no way to buy more. That's for testing an integration, not running an app. |
| Features | BAPI and SMTP with SDKs in six languages and an MCP server, inbound routing, webhooks, templates, address validation, US or EU regions and dedicated IPs. It covers the whole job; inbox placement tests are a separate product. | BAPI and SMTP with SDKs, separate streams for app and bulk email, inbound email turned into JSON, templates, 45 days of message history and DMARC reports as an add-on. It covers the whole job; inbound needs Pro. |
| Ease of use | CJudged on how fast a developer sends a first email: grab an API key, use an SDK or SMTP, and verify a sending domain. No rating on record. There's no send button at all, so everything goes through code. | CJudged on how fast a developer sends a first email: official SDKs, a sandbox mode, ready-made templates for resets and receipts, and migration guides. You'll still verify a domain first. No rating on record. |
| Platforms and integrations | BWeb, with an API, SMTP, SDKs and an MCP server, plus Zapier, Make, n8n, Shopify, HubSpot, Salesforce, WordPress and Datadog. No desktop or phone app, so B is the top. | BWeb, with an API and SMTP, plus Zapier, WordPress, Stripe, Slack, Supabase, Bubble, Netlify and Datadog. No desktop or phone app, so B is the top. |
| Best for | sending and receiving email from an app | app email kept apart from marketing sends |
The GPA is the average of the five grades: an A is 4 points, an F is none. The full reasons are on each tool's page: Mailgun and Postmark. How we grade
Price against what you get
Mailgun starts at $15 a month and scores 2.7 out of 4 on features, ease of use and platforms. Postmark starts at $15 a month and scores 2.7.
On this chart the two sit in the same place: the same score for the same starting price. Of the other email sending services on the chart, none scores higher than Mailgun for less, and none scores higher than Postmark for less.
Features, ease of use and platforms, averaged
What paid plans start at, a month (each step along is roughly double) →
- The best score at each price
- Has a free plan
- No free plan
Where they differ
- Mailgun starts at $15 per month for 10,000 emails. Postmark starts at $15 per month for 10,000 emails.
- Mailgun also covers email verification.
- Postmark also covers dMARC.
At a glance
| Mailgun | Postmark | |
|---|---|---|
| Pricing | Free plan | Free plan |
| Starts at | $15 per month for 10,000 emails | $15 per month for 10,000 emails |
| Free plan | 100 emails a day, 1 custom sending domain, 1 user, 1 inbound route, 1 day of logs and ticket support, through the API or SMTP. | Free developer plan: 100 emails a month with no expiry and no overages, for testing an integration or a small side project. No credit card needed. |
| Free trial | 30-day free trial of the Foundation and Scale plans | None listed |
| Web | ||
| Made by | Mailgun | ActiveCampaign, LLC |
| Price read from | mailgun.com | postmarkapp.com |
| Checked | Oct 18, 2026 | Oct 18, 2026 |
Who each one suits
Mailgun
- Developers sending and receiving email from an app
- Teams that want address validation from the same provider
- Companies that need email data kept in the EU
Postmark
- Software teams whose password resets and receipts must arrive fast
- Apps that need to receive and parse incoming email
- Bootstrapped founders, who can ask for $75 of credit
Worth knowing
Mailgun
- Free and Basic allow 1 sending domain and keep 1 day of logs; unlimited users and 1,000 domains start with Foundation at $35 a month.
- There is no send button: Mailgun sends through code, not a campaign editor.
- A dedicated IP comes with Scale at $90 a month; extra IPs are $59 each a month.
- Inbox placement tests and reputation monitoring are a separate product, Mailgun Optimize.
Postmark
- There is no tier between the free 100 emails a month and the 10,000-email paid plans.
- Billing is monthly only; the FAQ says annual plans are not offered yet.
- Basic has no inbound email processing and caps users at 4 and sending domains at 5.
- Dedicated IPs start at $50 a month per IP, need Pro or higher and 300,000 emails a month or more.
Key features
Mailgun
- Email API and SMTP relay
- Send from an app through a RESTful HTTP API or SMTP, with SDKs for Go, Node.js, PHP, Java, Ruby and Python, plus an MCP server.
- Inbound routing
- Receive email and forward it to your app or a webhook by rules called routes: 1 on Free, 5 on Basic and unlimited from Foundation.
- Email validation
- Check addresses by API or upload a whole list; Scale includes 5,000 validations and other plans pay from $1.20 per 100.
- US or EU data regions
- One account can send through either the US or the EU region, so message data can stay in the region you choose.
- Logs, analytics and webhooks
- Tracking, bounce classification and event webhooks on every plan, with log retention growing from 1 day on Free and Basic to 30 days on Scale.
- Dedicated IPs
- Scale includes a dedicated IP, IP pools and automated warm-up; more IPs cost $59 each a month.
Postmark
- Email API and SMTP
- Send through a REST API with official SDKs or through SMTP, with batch sending, a sandbox mode and migration guides from other providers.
- Message streams
- Transactional and bulk or broadcast email run on separate sending infrastructure, so marketing sends do not affect password resets and receipts.
- Inbound email processing
- Pro and Platform turn incoming email into a JSON object and post it to a webhook URL your app handles.
- Templates
- Responsive templates for welcome emails, password resets and receipts, with a template editor and import tool.
- Message history and analytics
- 45 days of full message content by default, adjustable from 7 to 365 days, with bounce details, open and link tracking and a stats API.
- DMARC monitoring
- DMARC Digests reports show authentication problems and who is sending with your domain, sold as an add-on from $14 a month per domain.
Plans
Mailgun
Free$0
100 emails a day, 1 sending domain, 2 API keys, 1 inbound route, 1 day of log retention and ticket support.
Basic$15
per month for 10,000 emails
No daily limit, 1 sending domain, 5 inbound routes, 1 day of logs. Extra emails $1.80 per 1,000.
Foundation$35
per month for 50,000 emails
1,000 sending domains, unlimited users, template builder, 5 days of logs, full inbound routing. Extra emails from $1.30 per 1,000; first month free.
Scale$90
per month for 100,000 emails
Dedicated IP and IP pools, SAML SSO, 5,000 validations, send-time optimization, chat and phone support, 30 days of logs. Extra emails from $1.10 per 1,000.
EnterpriseCustom
Everything in Scale plus custom features, deliverability services and a burst sending SLA.
Postmark
Free$0
100 emails a month, never expires; extra emails cannot be bought on this plan.
Basic$15
per month for 10,000 emails
5 sending domains, 4 users, 45 days of history, no inbound email. Extra emails $1.80 per 1,000; $55 a month at 50,000 emails.
Pro$16.50
per month for 10,000 emails
10 domains, 6 users, inbound email, retention up to 365 days. Extra emails $1.30 per 1,000; $60.50 a month at 50,000 emails.
Platform$18
per month for 10,000 emails
Unlimited domains, servers, streams and users, with inbound email. Extra emails $1.20 per 1,000; $66 a month at 50,000 emails.
High volumeCustom
Custom pricing for large senders, arranged through sales.
Ways to pay less
Mailgun
No public discounts listed.
Postmark
- Startups
$75 credit for bootstrapped companies
Companies that have launched, are charging for their product and have taken no outside investment can ask support for $75 of account credit.
