Postforge vs Mailchimp
Mailchimp is email marketing for every kind of business, owned by Intuit and priced by contacts. Postforge is built for ecommerce brands only: email on your store’s data, open source, on your own sending, never priced per stored profile.
Claude
Codex
CursorCopies a prompt your agent can run to set up Postforge for your store.
Side by side.
What each one is built for, how it sends, how it’s priced and who owns it. Facts about Mailchimp come from its own website and pricing pages, checked in October 2026.
| Topic | Postforge | Mailchimp |
|---|---|---|
| Focus | PostforgeEmail for ecommerce, nothing else | MailchimpEmail marketing for every kind of business, with SMS as an add-on in some countries |
| Platforms | PostforgeShopify, with full history and live sync; more platforms follow on the same core | MailchimpShopify, WooCommerce and many other apps through integrations |
| Sending | PostforgeYour own Resend or Amazon SES account, keys and domain | MailchimpMailchimp’s own sending infrastructure |
| Pricing model | PostforgeNever per stored profile; you pay your provider directly for what you send, without a markup | MailchimpBy contacts, with a monthly send limit per plan, or email credits paid as you go |
| AI | PostforgeTyped definitions with published schemas, one open API and an MCP server; every AI change is a proposal a person approves | MailchimpGenerative AI features and Intuit Assist (beta) in the product |
| Ownership | PostforgeOpen source (AGPL-3.0), self-hostable, your data in your database | MailchimpClosed-source SaaS from Intuit |
Which one fits you.
Both send good email. The difference is what else you want from the same tool, how you send and how you pay.
Pick Postforge if
- You sell on Shopify and want email done properly, without a suite
- You want to send through your own Resend or Amazon SES account
- You don’t want to pay for profiles you never email
- You want your AI agent to set up and run your email, with a person approving every change
- You want open source, with your data in your own database
Pick Mailchimp if
- You send newsletters for a business that doesn’t sell online
- You want SMS from the same tool, in the countries Mailchimp offers it
- Your store runs on a platform Postforge doesn’t support yet
- You send now and then and want to pay per email credit
Switching from Mailchimp.
Your store already holds your customers, orders and consent, so most of the move is setting up your sending and rebuilding your customer journeys as automations. Your agent can do much of it.
- 1
Connect your store
Install Postforge on Shopify. Customers, orders, products and email consent come in with their full history, so there is nothing to export.
- 2
Carry over your unsubscribes
Make sure everyone who unsubscribed in Mailchimp is unsubscribed in your store too. Postforge only emails people with consent and writes every unsubscribe back to the store.
- 3
Set up your sending
Connect Resend or Amazon SES and verify your domain. Start with your most engaged subscribers and grow volume over a few weeks, so inbox providers get to know your new sending.
- 4
Rebuild your automations
Start from the ready-made welcome, abandoned checkout, browse abandonment, post-purchase and win-back automations, or have your agent draft them from your Mailchimp customer journeys. You approve each one.
- 5
Switch over
Turn on each automation in Postforge as you turn off its counterpart in Mailchimp, so nobody gets both.
Questions, answered.
What people ask when they compare Postforge and Mailchimp.
Is Postforge a Mailchimp alternative?
For ecommerce brands, yes. Postforge covers segments, campaigns, automations like abandoned checkout and win-back, and revenue attribution, all built on your store’s customers, orders, products and on-site events. For newsletters without a store, Mailchimp is the better fit.
How is the pricing model different?
Mailchimp prices by contacts, with a monthly send limit per plan. Postforge is never priced per stored profile, and sending runs on your own Resend or Amazon SES account, so you pay them directly for what you send, without a markup.
What does Postforge do for ecommerce that Mailchimp doesn’t?
Postforge is built around your store: every order, product view and checkout lands on one timeline per person, automations start from store events like Checkout Started, and every attributed order shows which email, which click and how long before the order it was.
Can I keep my Mailchimp audience?
Your store’s customers come in with their email consent when you connect it. Before you send, make sure everyone who unsubscribed in Mailchimp is unsubscribed in your store too; Postforge only emails people with consent.
Does Postforge send transactional email?
No. Order confirmations and other transactional email stay with your store’s platform. Postforge sends marketing email: campaigns and automations.
Email is your best channel. Own it.
Open source, on your own sending, set up by your agent in an afternoon.