# Alternatives to Postmark Postmark is a transactional email service focused on speed and deliverability, providing a REST API and SMTP relay, templates, inbound parsing, webhooks, detailed message logs, and separate transactional and broadcast message streams. Postmark ranks #10 of 12 in Transactional email APIs, with an Alt Score of 85. It is proprietary, freemium from $15/mo for 10,000 emails/month and available on the web. 12 of 12 checklist rows are verified against a public source. Source: https://altcatalog.com/alternatives/postmark/ Category: Transactional email APIs ## Overview - **Who it's for**: Developers and SaaS teams who need reliable, fast delivery of transactional email (password resets, receipts, notifications) and want to keep it strictly separate from marketing/bulk sending. - **What you get**: A REST API and SMTP relay with built-in email templates, inbound email parsing (email replies converted to JSON), event webhooks for opens/clicks/bounces/spam complaints, 45-day activity retention with delivery/bounce/open analytics, and official SDKs for languages like TypeScript, Python, Ruby, .NET, Java, and PHP. - **How it works**: You send transactional email over the API or SMTP into isolated "Message Streams" that keep transactional traffic separate from broadcast/marketing traffic to protect deliverability; Postmark tracks each message's lifecycle (delivery, opens, clicks, bounces) and pushes events to your webhook URLs while storing full message content and history for 45 days by default. ## Profile - **License**: Proprietary (verified 2026-07-13) - **Pricing model**: Freemium (verified 2026-07-13) - **Starts at**: $15/mo for 10,000 emails/month (verified 2026-07-13) - **Platforms**: Web - **Status**: acquired (verified 2026-07-13) ## Ranked alternatives | # | App | Alt Score | Licence | Platforms | |---|-----|-----------|---------|-----------| | 1 | [Elastic Email](https://altcatalog.com/alternatives/elastic-email.md) | 100 | ? | Web | | 2 | [MailerSend](https://altcatalog.com/alternatives/mailersend.md) | 100 | Proprietary | Web, iOS | | 3 | [Mailgun](https://altcatalog.com/alternatives/mailgun.md) | 100 | Proprietary | Web | | 4 | [Amazon SES](https://altcatalog.com/alternatives/amazon-ses.md) | 93 | Proprietary | Web | | 5 | [Mailtrap](https://altcatalog.com/alternatives/mailtrap.md) | 93 | Proprietary | ? | | 6 | [Resend](https://altcatalog.com/alternatives/resend.md) | 93 | Proprietary | Web | | 7 | [SMTP2GO](https://altcatalog.com/alternatives/smtp2go.md) | 93 | ? | Web | | 8 | [Twilio SendGrid](https://altcatalog.com/alternatives/sendgrid.md) | 93 | Proprietary | Web | | 9 | [Zoho ZeptoMail](https://altcatalog.com/alternatives/zeptomail.md) | 93 | Proprietary | Web | | 10 | [useSend](https://altcatalog.com/alternatives/usesend.md) | 81 | AGPL-3.0 | Web | | 11 | [Postal](https://altcatalog.com/alternatives/postal.md) | 78 | MIT | Linux | Alt Score = Verified coverage (90%) + Visibility (10%). See https://altcatalog.com/how-alt-score-works/ ## Feature comparison Legend: Yes / No / Partial / ? (not verified). | Transactional email APIs checklist | Postmark | Elastic Email | MailerSend | Mailgun | Amazon SES | Mailtrap | |---|---|---|---|---|---|---| | Pricing model | Freemium | Freemium | Freemium | Freemium | Usage-based | Freemium | | Starts at | $15/mo for 10,000 emails/month | $19/mo | $7/mo | $15/mo | $0.10 per 1,000 emails | $15/mo | | License | Proprietary | ? | Proprietary | Proprietary | Proprietary | Proprietary | | Platforms | Web | Web | Web, iOS | Web | Web | ? | | REST API | Yes | Yes | Yes | Yes | Yes | Yes | | SMTP relay | Yes | Yes | Yes | Yes | Yes | Yes | | Deliverability tooling | Yes | Yes | Yes | Yes | Yes | Yes | | Templates | Yes | Yes | Yes | Yes | Yes | Yes | | Inbound email parsing | Yes | Yes | Yes | Yes | Yes | Yes | | Webhooks / events | Yes | Yes | Yes | Yes | Partial | Yes | | Suppression & bounce handling | Yes | Yes | Yes | Yes | Yes | Yes | | Dedicated IPs | Partial | Yes | Yes | Yes | Yes | Yes | | Analytics / logs | Yes | Yes | Yes | Yes | Yes | Yes | | SDKs | Yes | Yes | Yes | Yes | Yes | Yes | | EU data residency | No | Yes | Yes | Yes | Yes | No | | Free tier volume | Partial | Yes | Yes | Yes | Partial | Yes | ## Sources Sources for Postmark. Each alternative is sourced on its own page. - **License**: Proprietary — (verified 2026-07-13) - Quote: “You acknowledge and agree that AC PM owns all right, title and interest in and to the Service, including without limitation all intellectual property rights.” - **Starts at**: $15/mo for 10,000 emails/month — (verified 2026-07-13) - Quote: “Basic $15.00 /mo For solo developers and smaller teams Starting at 10,000 emails/month.” - **Platforms**: Web — (verified 2026-07-13) - Quote: “Fully redundant servers for the API, SMTP, Inbound and Web interface.” - **Pricing model**: Freemium — (verified 2026-07-13) - Note: Free Developer tier (100 emails/month, no overages) plus paid volume-tiered plans (Basic/Pro/Platform) starting at $15/mo for 10,000 emails with per-1,000 overage pricing. - Quote: “Everyone starts on our free Developer tier, which includes 100 emails every month. And it never expires or runs out.” - **Status**: acquired — (verified 2026-07-13) - Quote: “Postmark and DMARC Digests have been acquired by ActiveCampaign.” - **REST API**: Yes — (verified 2026-07-13) - Quote: “The Postmark API is built on REST principles. Authenticated users can interact with any of our URIs by using the specified HTTP request method.” - **SMTP relay**: Yes — (verified 2026-07-13) - Quote: “Setting up your web application to send emails using SMTP couldn't be easier. It's as simple as copying some credentials into a config file and you're ready to send.” - **Deliverability tooling**: Yes — (verified 2026-07-13) - Quote: “We share our delivery statistics to the major inbox providers right on our status page.” - **Templates**: Yes — (verified 2026-07-13) - Quote: “Postmark includes pre-built templates and layouts for common types of transactional emails like welcome emails, password resets, receipts and invoices, trial expirations, user invitations, and comment” - **Inbound email parsing**: Yes — (verified 2026-07-13) - Quote: “Postmark converts the email into an orderly bundle of JSON to make it incredibly easy for your application to consume and process the resulting text.” - **Webhooks / events**: Yes — (verified 2026-07-13) - Quote: “Postmark's webhooks notify your application about key message events such as bounces, deliveries, opens, clicks, and spam complaints.” - **Suppression & bounce handling**: Yes — (verified 2026-07-13) - Quote: “Suppression Management Automatic suppression” - **Dedicated IPs**: Partial — (verified 2026-07-13) - Note: Paid add-on ($50/IP/month), gated to Pro plan or higher and accounts sending 300,000+ messages/month (per postmarkapp.com/pricing: "Only available on Pro plans or higher"). - Quote: “Dedicated IPs Available to customers sending 300k messages a month or more. ... $50 /IP/month” - **Analytics / logs**: Yes — (verified 2026-07-13) - Quote: “By default, Postmark stores these insights for 45 days—and you can adjust the data retention time to your needs.” - **SDKs**: Yes — (verified 2026-07-13) - Quote: “Official libraries TypeScript Python SDK Rails gem Ruby gem .NET Java PHP Craft plugin Node.js CLI WordPress plugin Grunt plugin Zapier Actions” - **EU data residency**: No — (verified 2026-07-13) - Quote: “Postmark's primary data and servers are hosted at Deft's data center (located outside of Chicago), and Amazon Web Services (AWS). We currently don't have plans to add servers in the EU (GDPR does not ” - **Free tier volume**: Partial — (verified 2026-07-13) - Note: Free Developer tier is capped at 100 emails/month with no overages allowed; there is no paid tier between 100/month and the 10,000/month Basic plan (per FAQ: "We do not offer a tier between 100 emails - Quote: “Test your integration with 100 emails/month. No overages allowed in this plan.” --- Ranked by verified data, never by who paid. https://altcatalog.com/trust/