Mailmodo

AWeber is a long-established email marketing and automation platform for small businesses and creators. Its Advocate program pays 30–50% lifetime recurring commission, tiered by referral volume.

GetResponse is an email marketing, automation and sales-funnel platform. Its affiliate program pays tiered 40–60% recurring commission for 12 months, with a 90-day cookie.

EmailOctopus is a simple, low-cost email marketing tool for creators and small businesses. Affiliates earn 30% recurring commission for 12 months via Tolt.