Flatstamp vs Mailchimp
Mailchimp or Flatstamp: what a year of email costs.
Mailchimp: Monthly plan priced by how many contacts you store, with a send limit tied to that number. Flatstamp: your list is free, and you pay when you hit send, from $0.80 per 1,000 emails.
A year of sending
Each example emails the whole list four times a month.
| Your list | Mailchimp | Flatstamp |
|---|---|---|
| 1,000 contacts4,000 emails a month | $318Essentials | $40Save $278 |
| 5,000 contacts20,000 emails a month | $900Essentials | $190Save $710 |
| 10,000 contacts40,000 emails a month | Not in our data | $340 |
Side by side
- How you pay
- MailchimpMonthly plan by contact count, or pay-as-you-go credits.
- FlatstampPrepaid stamps. One stamp sends one email to one person. No monthly plan.
- What your list costs
- MailchimpEvery stored contact counts toward your plan, including unsubscribed ones.
- FlatstampFree. Store as many contacts as you like.
- Send limit
- MailchimpAbout 10 times your contact tier a month on Essentials.
- FlatstampAs many as you have stamps for.
- Free option
- Mailchimp250 contacts, 500 sends a month.
- FlatstampNo free plan. Contacts are free; sending starts at $20.
- Unused credit
- MailchimpMonthly allowance resets each month; pay-as-you-go credits expire after 12 months.
- FlatstampStamps never expire.
- Smallest purchase
- Mailchimp$13 a month (Essentials, 500 contacts).
- Flatstamp$20 for 25,000 stamps.
Mailchimp also sells prepaid credits. Email credits from $200 for 5,000 emails ($260 for 10,000; $1,300 for 50,000). Credits expire after 12 months.
The fine print
- The free plan stops at 500 sends a month: two emails to a 250-person list.
- Unsubscribed contacts still count toward the contact total you pay for.
- Essentials caps sends at about 10 times your contact tier each month.
- Pay-as-you-go credits expire after 12 months.
When Mailchimp is the better pick
- You want an all-in-one marketing suite: website, ads, social posting and a big template library in one account.
- You rely on one of Mailchimp's many integrations that we don't offer yet.
- Your list is under 250 people and you send fewer than 500 emails a month, so the free plan covers you.
Flatstamp is opening soon as an invite-only beta. This page compares prices, not features we haven't shipped yet.
Sources
Prices checked October 21, 2026: list prices on monthly billing, in US dollars, before tax and discounts, for Mailchimp's cheapest plan that fits. A range means we couldn't confirm every price step. Prices change, so check Mailchimp's own page before deciding.