Seika

Seika is a Stripe-native email automation platform that triggers perfectly-timed campaigns from Stripe events — abandoned checkouts, failed payments, trial endings, new subscriptions, cancellations, and more. Connect Stripe once and webhooks configure automatically; build emails in a drag-and-drop editor, set cancellation rules (so a recovery email is skipped if the customer pays in time), and see ROI attributed dollar-for-dollar to each campaign. Three lifetime tiers from $49 (5k emails/mo, 1 Stripe account) to $199 (100k emails/mo, 10 Stripe accounts, team access for 5) — pay once, use forever, with a 60-day money-back guarantee.