Mailchimp is full-featured email marketing with a well-documented API, used as a bare-bones waitlist by building a form that pushes to a contact list. No queue mechanic, no position tracking, no referral system, and a 250-contact free tier that is nearly unusable for a real launch.
Key differences
Mailchimp collects contacts — there is no position, no ordering guarantee, and no idempotency on re-submission. A contact submitted twice becomes two rows. Enlist assigns position inside a locked transaction, and re-submitting the same email is a no-op that returns the original position.
Mailchimp's free tier caps at 250 contacts — enough to prototype, not to launch. Enlist's free plan includes 500 stored signups with full API access, no credit card, and no time limit.
Mailchimp pricing scales with contact count — a larger list and a larger invoice are the same thing. Enlist pricing is capacity: signups stored, not signups per month, with no overage on any tier.
Mailchimp has no MCP integration. Enlist exposes create-waitlist, add-signup, and read-position over a hosted MCP endpoint — a coding agent can wire the entire signup flow in one prompt.
Up to 500 signups on the free tier. Add the MCP server and your agent wires the whole integration in one prompt.