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Pay for sends, not for silence
Most newsletter tools charge for the size of your list. StalkMail charges for the emails you actually send, and puts every feature on every plan.
| Feature | StalkMail | beehiiv | Mailchimp | Ghost | Substack |
|---|---|---|---|---|---|
| Pricing model | Per email sent | Per subscriber | Per subscriber + sends | Flat hosting or per member | 10% of revenue |
| Every feature on every plan | Mostly | ||||
| Campaign scheduling | Limited | ||||
| Newsletter website and archive | Limited | ||||
| Custom sending domain | |||||
| Signup forms | |||||
| CSV imports | Limited | ||||
| Open and click stats | Limited | ||||
| REST API | Limited | Limited | |||
| MCP and AI agents | Not advertised | Not advertised | Not advertised | Not advertised | |
| Open source |
Based on publicly listed plans and documentation, October 2026. Providers change their pricing and features; check their site before you switch. “Not advertised” means we could not find a public description of the capability.
The difference
Three things we do differently
Not a longer feature list. A different set of trade-offs.
Per email, not per subscriber
A large, quiet list is not a monthly bill. You pay when you send, and the price per email goes down as you grow.
Every feature, every plan
No “Pro” badge on the API. No paywalled website. The cheapest plan gets the same product as the most expensive one.
Agents are first-class
The dashboard is a client of the API. An MCP tool and a button run the same action with the same checks.