Postmark helps you stop worrying if your emails made it to the inbox, and get back to focusing on what matters—building great products. Send transactional and marketing emails and get them to the inbox on time, every time.

Substack helps anyone set up a blog and email newsletter and publish directly to their audience and get paid through subscriptions. No tech knowledge is required. It’s free to get started on Substack. If you turn on paid subscriptions, Substack will keep a 10% cut of revenues.

Feature Comparison

Postmark and Substack both have great feature sets so the right tool for you really depends on your needs.

FeaturesPostmarkSubstack
💸 Paid Subscriptions

Accept paid subscriptions

➗ Segmentation

Create segments of subscribers

🤖 Automation

Automate actions based on behaviors

📩 Embeddable Forms

Embeddable subscription forms

📄 Landing Pages

Create landing pages for your newsletter

🔌 3rd Party Integrations

Connect to other services

🖊️ Visual Editor

Drag and drop email editor

📝 Markdown Editor

Write emails in markdown

👩‍💻 HTML

Design emails with HTML text

⚒️ API

Integrate with the platform's API

📈 Analytics

Get data on your emails' performance

🌍 Custom Domain

Use a custom domain for your page

🗣️ Referrals

Setup a referral program

💽 Self Hosting

Host on your own server

📢 Recommendations

Recommend and be recommended by other newsletters

Price Comparison

Substack is free to use but takes a 10% cut of paid subscriptions.

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Compare Postmark to other tools

See how Postmark stacks up to these other services.

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Postmark vs Constant Contact

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Postmark vs Mailchimp

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Postmark vs EmailOctopus

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Postmark vs Sendy

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Postmark vs Ghost

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Postmark vs MailerLite

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Postmark vs Klaviyo

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Postmark vs SendFox

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Postmark vs Kit (ConvertKit)

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Postmark vs Drip

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Postmark vs MailWizz

Email’s still the MVP—but only if you know how to use it. Get weekly, no-fluff insights on deliverability, list growth, and engagement with Audience Bridge Insights.

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