Flatstamp vs Kit
Kit or Flatstamp: what a year of email costs.
Kit: Monthly plan priced by subscriber count, with unlimited sends. Formerly ConvertKit. 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 | Kit | Flatstamp |
|---|---|---|
| 1,000 contacts4,000 emails a month | $0Free | $40$40 more |
| 5,000 contacts20,000 emails a month | $0Free | $190$190 more |
| 10,000 contacts40,000 emails a month | $0Free | $340$340 more |
Side by side
- How you pay
- KitMonthly plan by subscriber count.
- FlatstampPrepaid stamps. One stamp sends one email to one person. No monthly plan.
- What your list costs
- KitPriced by subscribers.
- FlatstampFree. Store as many contacts as you like.
- Send limit
- KitNo limit.
- FlatstampAs many as you have stamps for.
- Free option
- KitUp to 10,000 subscribers, fewer features.
- FlatstampNo free plan. Contacts are free; sending starts at $20.
- Unused credit
- KitNot applicable: sends are unlimited.
- FlatstampStamps never expire.
- Smallest purchase
- Kit$39 a month for paid features (Creator, 1,000 subscribers).
- Flatstamp$20 for 25,000 stamps.
The fine print
- Kit's own help centre lists unlimited sends on the free plan, up to 10,000 subscribers.
- The catch is features: one automation and one email sequence, no integrations, and (per reviewers) Kit branding on every email.
- Go over 10,000 subscribers and you must upgrade to keep sending.
When Kit is the better pick
- Your list is under 10,000 and the free plan's features are enough: it costs nothing, which beats any price we can offer.
- You're a creator who wants paid newsletters, a creator network and sponsorships built in.
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 Kit's cheapest plan that fits. A range means we couldn't confirm every price step. Prices change, so check Kit's own page before deciding.