Mailgun and Notix both start paid sending at $15 a month, and both send the same JSON email call over an API or an SMTP relay. The difference is what the $15 includes and what sits around the send: Mailgun includes 10,000 emails and offers inbound routing and address validation; Notix includes 50,000, adds an OTP API, a pre-send deliverability check and marketing mail on one shared suppression list. Which fits depends on whether you receive mail or only send it.
Mailgun's figures were read from its pricing page on 2026-09-13; the date is repeated under the table. Notix figures come from its own pricing page.
| Criterion | Mailgun | Notix |
|---|---|---|
| Free tier | 100 emails a day, one inbound route | 5,000 emails a month, 200 a day, no card, no end date |
| Entry paid plan | Basic $15 a month | Pro $15 a month |
| Included on that plan | 10,000 emails a month (Foundation: $35 for 50,000) | 50,000 units on Pro, with optional pay-as-you-go past that; Scale $35 for 100,000 and Business $75 for 300,000 units |
| SMTP relay | Yes, on every plan | Yes, on every plan |
| SDKs | Node, Python, PHP, Ruby, Go, Java, C# | TypeScript, Python, PHP |
| Webhooks | Yes | Yes, signed, for email, contact and domain events |
| OTP / verification API | No | Yes, email and SMS codes |
| Deliverability check before sending | Email validation as an add-on ($1.80 per 1,000 on Basic; 5,000 included from Foundation) | Yes, a pre-send check API |
| Billing outside USD | USD by card | USD by card; naira and shillings from a prepaid wallet |
| SLA | Stated for Scale and above | 99.9% on paid plans, credits on the pricing page |
| Prices and limits read from the vendors' own pages: www.mailgun.com on 2026-09-13. Notix figures are from its own pricing page. | ||
Mailgun's free plan is 100 emails a day with one inbound route. Basic is $15 a month for 10,000 emails, Foundation $35 for 50,000 with 5,000 validations included, and Scale $90 for 100,000. Notix Free is 5,000 emails a month and 200 a day with no card and no end date; Pro is $15 for 50,000 units, with optional pay-as-you-go past that at the rate on the pricing page. At 10,000 emails the two cost the same; at 50,000 the gap is $20 a month.
Mailgun's messages endpoint takes form-encoded or JSON fields and supports batch sending with per-recipient variables, scheduled delivery and tags for analytics. Notix takes a JSON body with an idempotency key so a retry cannot double-deliver, and has batch and scheduled sends on the same endpoint family; its email API also covers contacts, templates and campaigns under one key. Both expose an SMTP relay on every plan. A plain transactional send moves between them after a client swap.
Mailgun sells address validation as a product, from $1.80 per 1,000 on Basic to 5,000 included on Foundation, and offers dedicated IP pools on Scale. Notix has a deliverability check you call before a send, which returns a score and the findings that would block delivery, and a suppression list shared across transactional and marketing mail. The transactional email API page describes both. They solve different problems: Mailgun cleans lists; Notix checks messages. Both verify domains with SPF, DKIM and DMARC and report bounces and complaints.
Mailgun's sending product is transactional-first; an email template builder arrives on Foundation, and its parent Sinch sells marketing tooling separately. Notix has contact books with double opt-in, a template editor, campaigns and journeys in the same account as transactional sending, on one suppression list, so an address that bounced a campaign never receives a receipt. If you want one vendor for both kinds of mail, Notix bundles it and Mailgun does not.
Mailgun publishes official SDKs for Node, Python, PHP, Ruby, Go, Java and C#. Notix publishes TypeScript, Python and PHP, and everything else uses the JSON endpoint with a plain HTTP client, as the docs show for curl. Go, Ruby, Java and C# teams get a typed client from Mailgun and not from Notix. For the three languages both cover, the clients are interchangeable in shape.
Mailgun sends the email you compose; generating a code, storing it, expiring it and checking the user's answer are yours to build. Notix has a verification API that does all four in two calls, by email or by SMS, with a risk score on the request. If sign-in or sign-up codes are part of your product, this is a real difference between the two; if you never send a code, it is a row you can skip.
Mailgun bills in US dollars by card. Notix bills from a prepaid wallet in US dollars, naira or shillings, topped up by bank transfer, card or mobile money, from which Pro is charged each month, so a card that clears international charges is not required. Plan prices are the same everywhere; only the currency and the payment method differ. If you bill from Lagos or Nairobi, this is often the deciding row.
Notix states a 99.9 percent uptime commitment on paid plans, with the credit schedule written on the pricing page; the free plan is best effort. Mailgun states an SLA on Scale and above, not on Basic or Foundation, so at the $15 line neither vendor's figure applies to Mailgun. Both offer email support; Mailgun adds live chat and phone support on higher plans.
Already decided? The switching from Mailgun page has the SDK and SMTP swap and the suppression import.
Same $15 entry, 50,000 emails instead of 10,000, and a suppression list shared across transactional and marketing.
NotixA free plan with no card, and Pro at $15 a month for 50,000 emails. Only sent volume is metered.
ProductOTPs, receipts and alerts with idempotency keys, a deliverability pre-check and a shared suppression list.
CompareEvery vendor in one table with read dates, and a straight answer to which transactional email API a startup should pick.
CompareTen thousand emails for $15 against fifty thousand, and the one thing Postmark has that Notix does not claim.
5,000 emails a month on Free, no card, no end date. Pro is $15 for 50,000 emails, paid from a prepaid wallet in dollars, naira or shillings.