Migrate from Postmark to PostStack

Why switch from Postmark?

• €5/month for 10,000 emails, roughly 63% cheaper than Postmark at that volume
• Savings of up to 67% at low and mid volumes, narrowing toward the multi-million range
• IMAP and POP3 mailboxes, a visual email builder, and DMARC aggregate reports, none of which Postmark ships
• European infrastructure in Helsinki, Finland, not subject to the US CLOUD Act

Price Comparison

Code Migration

import * as postmark from 'postmark';
const client = new postmark.ServerClient(process.env.POSTMARK_API_KEY!);

await client.sendEmail({
  From: 'hello@yourdomain.com',
  To: 'user@example.com',
  Subject: 'Hello!',
  HtmlBody: '<h1>Welcome!</h1>',
});

import PostStack from '@poststack/sdk';
const poststack = new PostStack('sk_live_...');

await poststack.emails.send({
  from: 'hello@yourdomain.com',
  to: 'user@example.com',
  subject: 'Hello!',
  html: '<h1>Welcome!</h1>',
});

Feature Comparison

Migration Steps

1. 1Sign up for PostStack and get your API key
2. 2Install the PostStack SDK: npm install @poststack/sdk
3. 3Add your domain and verify DNS records
4. 4Replace the Postmark SDK with @poststack/sdk
5. 5Update API calls to PostStack's camelCase format
6. 6Test in development, then switch production traffic

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