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SimpleNewsletter365 vs Mailchimp
Last updated July 1, 2026
This comparison was last reviewed on July 1, 2026. Mailchimp changes its plans and prices often, so verify current details on Mailchimp’s own pricing page before you decide.
In short
SimpleNewsletter365 and Mailchimp both send email newsletters, but they are built on different models. SimpleNewsletter365 sends from your own Microsoft 365 mailbox and domain and bills you on emails sent, with unlimited contacts on every plan. Mailchimp is a broad all-in-one marketing platform that sends from its own shared infrastructure and bills you on the number of contacts you store, with the price rising as your list grows.
Choose SimpleNewsletter365 if you are on Microsoft 365 and want newsletters to send from your own address and domain, with pricing that does not grow just because your list does. Choose Mailchimp if you want an all-in-one marketing suite (landing pages, automations, ads, CRM, and SMS) and are comfortable with contact-based pricing.
At a glance
| SimpleNewsletter365 | Mailchimp | |
|---|---|---|
| Sends from | Your own Microsoft 365 mailbox and domain (Microsoft Graph) | Mailchimp’s shared sending infrastructure |
| Pricing model | Per email sent | Per contact stored |
| Contacts | Unlimited on every plan | Counted, and drive your price |
| Free plan | 10,000 sends/mo, unlimited contacts | Up to 250 contacts, 500 sends/mo |
| Scope | Focused newsletter tool | Broad marketing platform (email, SMS, ads, CRM, sites) |
| Best fit | Microsoft 365 teams sending newsletters | All-in-one marketing across many channels |
Pricing: sends vs contacts
The core difference is what you pay for.
Mailchimp charges by contacts stored. Its Free plan covers up to 250 contacts and 500 sends per month. Paid plans are priced in contact tiers, and the monthly send limit is a multiple of your contact count (Essentials 10x, Standard 12x, Premium 15x). As your list grows you move into higher tiers and your bill rises, even for contacts you rarely email.
SimpleNewsletter365 charges by emails sent, with unlimited contacts. Free includes 10,000 sends per month. Starter is $9/mo for 20,000 sends, Growth is $19/mo for 40,000, and Scale is $29/mo for 100,000, with annual billing about 20% cheaper. Storing a large list never raises your bill; only sending does.
For a list you email occasionally, send-based pricing is usually cheaper and more predictable. For very high send volume against a small list, contact-based pricing can be competitive.
Deliverability: your mailbox vs shared infrastructure
Mailchimp sends from its own shared IPs and domains, with dedicated IPs available on higher tiers. SimpleNewsletter365 sends each newsletter through your own Microsoft 365 mailbox over Microsoft Graph, from your real address and domain, so it draws on the sender reputation your organization already has. There is no shared marketing IP and no separate sending identity to warm up. Sending is paced to stay within Microsoft’s per-mailbox limits.
Features and scope
Mailchimp is a broad platform: email and SMS, automations and journeys, landing pages and websites, forms, a CRM, and paid-ads integrations. If you want to run many marketing channels from one tool, that breadth is a genuine advantage.
SimpleNewsletter365 is a focused newsletter tool for Microsoft 365: compose and send newsletters, manage contacts and segments, publish signup forms, add a custom domain for branded tracking links and click analytics, and view delivery and engagement reports. It does one job and fits inside the Microsoft 365 you already use, including team roles and shared-mailbox or alias sending.
Who each is best for
SimpleNewsletter365 is the better fit if you:
- Run on Microsoft 365 and want to send from your own mailbox and domain
- Have a large or growing list that you email periodically
- Want predictable pricing that does not scale with list size
- Prefer a focused newsletter tool over a broad marketing suite
Mailchimp is the better fit if you:
- Want an all-in-one marketing platform across email, SMS, ads, and web
- Rely on Mailchimp’s automations, landing pages, or built-in CRM
- Are not on Microsoft 365, or do not want to send from your own mailbox
Switching from Mailchimp
Export your audience from Mailchimp as a CSV and import it into SimpleNewsletter365, where contacts are unlimited. Connect your Microsoft 365 mailbox, rebuild the newsletters you send regularly, and add a custom domain if you want branded links. Because SimpleNewsletter365 focuses on newsletters, workflows that depend on Mailchimp’s broader features, such as ads, websites, or complex multi-step automations, would not carry over.
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Frequently asked questions
Is SimpleNewsletter365 a good Mailchimp alternative for Microsoft 365 users?
Yes. If your organization runs on Microsoft 365, SimpleNewsletter365 sends newsletters from your own mailbox and domain and keeps contacts unlimited, which suits Microsoft 365 teams better than Mailchimp's shared sending and contact-based pricing. Mailchimp remains a stronger fit if you need an all-in-one marketing suite across email, SMS, ads, and web.
How is SimpleNewsletter365 pricing different from Mailchimp?
SimpleNewsletter365 bills on emails sent, with unlimited contacts, so storing a large list never raises your price. Mailchimp bills on the number of contacts you store, and the price rises as your list grows, even for contacts you rarely email.
Does SimpleNewsletter365 send from my own domain like a normal email?
Yes. Newsletters send through your own Microsoft 365 mailbox over Microsoft Graph, from your real address and domain, rather than a shared marketing IP.
Can I import my Mailchimp contacts?
Yes. Export your audience from Mailchimp as a CSV and import it into SimpleNewsletter365, where contacts are unlimited on every plan.