10 Best Email Marketing Tools for Small Business in 2026 (All With Affiliate Programs)

Email marketing still delivers the highest ROI of any digital marketing channel — $36 for every $1 spent, according to Litmus (2024). That hasn’t changed in 2026. If anything, with AI-powered personalization and automation, email marketing has become even more effective for small businesses. But choosing the right tool? That’s where most small business owners waste weeks comparing features they’ll never use. I’ve tested dozens of email marketing platforms over the years — for my own businesses..