Kit

Email marketing with the longest integration list

Newsletters with paid subscriptions and referrals

Works with Substack

Email marketing that stays cheap as lists grow

Email, SMS and automation on one free plan

Giveaways with a lifetime price tag

Paid subscriptions with a reader network attached

Works with Substack

Affiliate programs built on top of Stripe

Affiliate tracking and a brandable portal

Publishing and paid subscriptions, open source