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SimpleNewsletter365 vs Substack
Last updated July 1, 2026
Last reviewed July 1, 2026. Verify current Substack terms on Substack’s own site before deciding.
In short
Substack and SimpleNewsletter365 solve different problems. Substack is a public publishing platform for individual writers: free to start, with a built-in discovery network and paid subscriptions, in exchange for a 10% cut of your subscription revenue. SimpleNewsletter365 is a business newsletter tool that sends from your own Microsoft 365 mailbox and domain for a flat, send-based price and takes no share of your revenue.
Choose SimpleNewsletter365 if you send newsletters as a business or team from your own domain and want predictable costs. Choose Substack if you are a writer building a public, monetized audience.
At a glance
| SimpleNewsletter365 | Substack | |
|---|---|---|
| Sends from | Your own Microsoft 365 mailbox and domain | Substack’s platform |
| Pricing model | Flat, per email sent | Free, but 10% of paid-subscription revenue |
| Contacts | Unlimited | Unlimited |
| Branding and domain | Your address and domain | Substack publication (custom domain add-on) |
| Best fit | Business and team newsletters | Individual writers monetizing an audience |
Pricing and ownership
Substack is free to publish with no subscriber or send limits, but once you charge readers it takes 10% of your subscription revenue, and payment processing pushes the effective cost higher. At scale, that percentage can exceed a flat monthly fee. SimpleNewsletter365 charges a flat subscription based on how many emails you send, with unlimited contacts, and never takes a share of your revenue.
Substack also owns the reader relationship on its platform and network. SimpleNewsletter365 sends from your own mailbox and domain, so the relationship and sender identity stay with you.
Who each is best for
SimpleNewsletter365 suits businesses and teams on Microsoft 365 that want newsletters sent from their own domain, with flat pricing and no revenue share.
Substack suits individual writers and creators who want a public presence, a discovery network, and built-in paid subscriptions, and who accept the revenue share in exchange.
Switching
Export your subscriber list from Substack as a CSV and import it into SimpleNewsletter365, where contacts are unlimited. Connect your Microsoft 365 mailbox and rebuild your newsletter. Substack-specific features such as the discovery network, comments, and hosted paid subscriptions are not part of a send-from-your-own-mailbox tool.
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Frequently asked questions
How is SimpleNewsletter365 different from Substack?
Substack is a public publishing platform that is free to use but takes 10% of your paid-subscription revenue, and it sends from its own platform. SimpleNewsletter365 is a business newsletter tool that sends from your own Microsoft 365 mailbox and domain for a flat, send-based price with no revenue share.
Does Substack take a cut of revenue?
Yes. Substack takes 10% of paid-subscription revenue, plus payment processing fees, which together typically reach 13 to 16% of gross. SimpleNewsletter365 charges a flat subscription based on sends and takes no share of your revenue.
Which should I use for a company newsletter?
For a company or team newsletter sent from your own domain, SimpleNewsletter365 fits better. Substack is designed for individual writers building and monetizing a public audience.