Integrations
You copy the draft. There is no sender connection, no list sync, and no event feed.
What you can take with you
Paid plans can export the draft as Markdown. Paste that text into the mail tool you already use.
Payments
Checkout uses Waffo. /api/webhook is the payment callback. It does not send your sequence.
There is no Slack, CRM, or mail-tool connector in this product today.