--- title: "Prontuno vs Postmark: pricing and features compared" description: "At $99 a month, Prontuno sends 500,000 emails and Postmark sends 79,000. Compare features, limits, and who each provider suits." image: "https://prontuno.com/wp-content/uploads/2026/02/prontuno-og-image.png" --- [Compare](https://prontuno.com/compare/)Head to head # Prontuno vs Postmark By Tunbosun Ayinla, Founder of Prontuno. Last updated: September 26, 2026. Postmark and Prontuno both specialize in transactional email, and both offer a REST API and SMTP. Postmark does more beyond sending, with inbound processing, stored templates, and broadcast streams. Prontuno costs far less at volume and includes 1,000 sending domains on Standard. [Request access](https://app.prontuno.com/get-started/) [Compare features](#compare-glance) 10,000 free credits after approvalReviewed within 24 hours What $99 a month sends emails / month Prontuno Standard · 500,000 included 500,000 Postmark Pro · 50,000 included + 29,000 overage 79,000 Prontuno: 6.3× as many emails as Postmark for $99. Counted per recipient, on each provider’s best published plan. | Feature | Prontuno | Postmark | | --- | --- | --- | | Pricing model | Prepaid credits, or monthly plans per team | Monthly plans by volume, with overages | | Lowest paid price | $25 credit pack, or $99 a month for Standard | $15 a month for 10,000 emails on Basic | | Free usage | 10,000 credits after approval | 100 emails a month on the developer plan | | Ways to connect | REST API, SMTP relay, and a hosted MCP server. No official SDKs yet | REST API, official SDKs, SMTP, and an official MCP server | | Sending domains | 100 per team on credits, 1,000 on Standard and Plus, unlimited on Unlimited | 5 on Basic, 10 on Pro, unlimited on Platform | | Dedicated IP | Included with Unlimited, warmed and monitored by Prontuno | From $50 a month per IP, for 300,000 or more emails a month | | Message history | 30 days | 45 days, with longer retention as an add-on | | Open and click tracking | Not offered. Links and content are sent exactly as written | Available, off by default | | Inbound email | Not offered yet | Included on Pro and Platform | | Marketing email | Not supported | Broadcast message streams | Postmark details checked September 26, 2026. [See Postmark pricing](https://postmarkapp.com/pricing). | Monthly budget | Prontuno | Postmark | | --- | --- | --- | | $25 | 25,000 Pay as you go · credits valid for 1 year | 16,000 Pro · 10,000 included + 6,000 overage | | $99 | 500,000 Standard · 500,000 included | 79,000 Pro · 50,000 included + 29,000 overage | | $299 | 2,000,000 Plus · 2,000,000 included | 331,000 Basic · 300,000 included + 31,000 overage | | $999 | Unlimited Unlimited · dedicated IP included | 1,631,000 Basic · 1,500,000 included + 131,000 overage | Monthly allowances reset each billing cycle. Prontuno prepaid credits stay valid for a year. Prices from the [Postmark pricing page](https://postmarkapp.com/pricing), checked September 26, 2026. [Try any budget in the pricing calculator ](https://prontuno.com/pricing/#comparison-heading) In detail ## The differences that matter Price at volume Postmark bills by monthly volume tier and charges overages above it. At $99 a month, the best Postmark option sends 79,000 emails. Prontuno Standard includes 500,000 for the same price, and anything beyond that uses prepaid credits, not an overage invoice. Features beyond sending Postmark includes stored templates on every plan, inbound processing on Pro and Platform, and broadcast streams for marketing mail. Prontuno sends transactional email only and does not receive email yet. If you rely on those features, Postmark is the better fit. Domains and IPs Postmark allows 5 sending domains on Basic and 10 on Pro. Dedicated IPs start at $50 a month and need 300,000 or more emails a month. Prontuno Standard includes 1,000 domains per team, and Unlimited includes a dedicated IP that Prontuno warms and monitors. Message history Postmark keeps 45 days of message history, with longer retention as an add-on. Prontuno keeps 30 days of delivery logs and sends each event to your webhooks as it happens. ### Choose Prontuno if - You send more than about 50,000 emails a month and want a fixed price - You need many sending domains without moving to a higher tier - You want a dedicated IP that is warmed and monitored for you - You only send transactional email - You want links sent exactly as written, with no tracking redirects ### Choose Postmark if - You process inbound email, such as replies or support mail - You want stored templates edited outside your code - You send marketing email from the same provider - You need more than 30 days of message history Switching ## Move from Postmark in four steps 1. Step 1 Request access and describe what your app sends. Applications are reviewed within 24 hours. 2. Step 2 Add your sending domain and publish the DNS records Prontuno generates. They use their own names, so your Postmark records can stay while you switch. 3. Step 3 Change your SMTP settings, or update your API calls to Prontuno’s format, then send a test email. 4. Step 4 Add a webhook endpoint for delivery events, and import your suppression list through the API. FAQ ## Questions about Prontuno and Postmark Is Prontuno cheaper than Postmark? At a $99 monthly budget, Prontuno Standard sends 500,000 emails and Postmark sends 79,000. Prontuno sends more at that budget, but Postmark can cost less at lower volumes. Check your own volume in the [pricing calculator](https://prontuno.com/pricing/#comparison-heading) . Checked September 26, 2026. Can I switch from Postmark without rewriting my code? If you send over SMTP, yes: only the host, port, and credentials change. Postmark’s API uses its own field names, such as From, To, and HtmlBody, so each send call needs updating to Prontuno’s from, to, subject, and html fields. If your app sends email from one place, such as a mailer class, updating it is usually a small change. When is Postmark the better choice? Postmark is the better choice if you process inbound email, such as replies or support mail; you want stored templates edited outside your code; you send marketing email from the same provider; or you need more than 30 days of message history. Do I need a new domain to switch from Postmark? No. Add your existing domain to Prontuno and publish the DNS records it generates. They use their own names, so your Postmark records keep working until you finish switching. Does Prontuno track opens and clicks? No, by design. Prontuno sends your links and content exactly as written, so password reset and sign-in links are never rewritten through a tracking domain, and no tracking pixel is added. Delivery, deferral, and bounce events are still reported in your logs and webhooks. To measure clicks, add a parameter to links on your own domain and record it in your app. Can I send marketing email with Prontuno? No. Prontuno is for transactional email only, such as password resets, receipts, and account alerts. Every account is reviewed, which keeps marketing mail off the shared IPs. Newsletters and campaigns need a separate provider. Keep comparing ## More comparisons - [Postmark alternatives](https://prontuno.com/compare/postmark-alternatives/) Every option compared, including Prontuno. - [Prontuno vs Resend](https://prontuno.com/compare/prontuno-vs-resend/) 171,000 emails for $99 a month. - [Prontuno vs SendGrid](https://prontuno.com/compare/prontuno-vs-sendgrid/) 171,000 emails for $99 a month. - [Prontuno vs Mailgun](https://prontuno.com/compare/prontuno-vs-mailgun/) 121,000 emails for $99 a month. - [Prontuno vs Amazon SES](https://prontuno.com/compare/prontuno-vs-amazon-ses/) 618,750 emails for $99 a month. - [Prontuno vs Cloudflare Email Service](https://prontuno.com/compare/prontuno-vs-cloudflare/) 271,000 emails for $99 a month. [See all comparisons ](https://prontuno.com/compare/) Request access ## Tell us what you send. We will take it from there. We review every application within 24 hours to keep our sending pool clean. Approved accounts start with 10,000 free credits. [Request access](https://app.prontuno.com/get-started/) [Talk to us](https://prontuno.com/contact/)