When you've outgrown a free email-sending tier, the next line on the invoice can feel decisive. Resend actually offers three real steps: a $0/month free plan capped at 100 emails a day, a $20/month Pro plan for growing sends, and a $90/month Scale plan that unlocks everything — plus a separate $20/month Domains add-on that isn't part of any tier. Postmark, by contrast, spreads its entry points across three paid tiers and a menu of add-ons, letting you stack only the features you need.
How the plans break down
Resend's free tier is blunt: $0/month for 100 emails a day, three domains, and ticket-only support. The next step up, Pro, costs $20/month (or $35/month on a higher send-volume variant) and raises sending limits before you need the full Scale plan. Scale itself is $90/month and bundles all Pro features, a thousand domains, and a dedicated [Slack](/entry/slack-vs-github-picking-the-right-tool-for-chat-first-or-code-first-teams) channel. Separately, Resend sells a Domains add-on for $20/month that adds 100 domains on top of whatever your plan already includes — a coincidence of pricing that makes it easy to mistake for the Pro plan's fee, but it's a stackable add-on, not a tier.
Postmark offers a $0/month free tier aimed at testing integrations and low-volume side projects. From there, the Basic plan costs $15/month and adds industry-leading deliverability, 45-day data retention, and five custom sending domains. The Pro tier nudges the price to $16.5/month while extending retention options up to 365 days and raising the domain limit to ten. The Platform tier sits at $18/month and removes the domain cap entirely. Beyond the core tiers, Postmark sells dedicated IPs for $50/month, custom activity retention for $5/month, and DMARC monitoring for $14/month, giving teams granular control over every line item.
| Vendor | Plan | Price | Key Inclusions |
|---|---|---|---|
| Resend | Free | $0/month | 100 emails a day; 3 domains; Ticket support |
| Resend | Pro | $20/month | Higher sending limits than Free |
| Resend | Scale | $90/month | All Pro features; 1,000 domains; Dedicated Slack channel |
| Resend | Domains add-on | $20/month | Adds 100 domains on top of your plan |
| Postmark | Free | $0/month | Testing integration; evaluating deliverability; low-volume side projects |
| Postmark | Basic | $15/month | Deliverability & speed; 45-day data retention; 5 custom sending domains |
| Postmark | Pro | $16.5/month | Retention up to 365 days; 10 custom sending domains |
| Postmark | Platform | $18/month | Unlimited custom sending domains |
| Postmark | Dedicated IPs | $50/month | Dedicated IP |
| Postmark | Custom activity retention | $5/month | Extra retention |
| Postmark | DMARC monitoring | $14/month | DMARC monitoring |
Which model fits your workflow
If you prefer a single, predictable bill and expect to manage a large portfolio of domains, Resend's Scale tier delivers everything for $90/month, or you can stay on Pro at $20/month until sending volume justifies the jump. The Domains add-on lets you extend either tier by 100 domains for another $20/month, without forcing a full upgrade.
Conversely, teams that value pay-as-you-grow flexibility will gravitate toward Postmark. Starting at $15/month, you can pick the exact capabilities you require — whether that's a dedicated IP for reputation management ($50/month) or DMARC monitoring for compliance ($14/month). The incremental price differences between Basic, Pro, and Platform are modest, yet each tier unlocks a meaningful increase in domain capacity and data-retention options, making Postmark a better fit for organizations with evolving compliance or branding needs.
In short, choose Resend if you want a straightforward tier ladder from $0 to $90/month with an optional domains add-on. Opt for Postmark when you want granular control over features, a lower entry price, and the ability to add specialized services only when they become necessary.
Pricing verified on 2026-09-16.