Best email marketing tool for solo founders

The email marketing tool market is saturated with 150-200+ platforms ranging from Mailchimp to ConvertKit, but this creates a false sense of competition. Most established players optimize for teams, agencies, or mid-market businesses—they've bloated feature sets, complex pricing tiers, and onboarding workflows that assume you have a marketing person. The real pain point for solo founders isn't sending emails; it's the cognitive overhead of deciding between 50 features you'll never use and the anxiety of hitting a pricing wall when you grow. The actual gap exists at the intersection of simplicity, transparent pricing without surprise tier jumps, and lightweight automation that doesn't require learning a visual builder language. A new entrant should obsess over the first-time user experience—specifically, the moment between signup and first campaign send, and build for founders who care more about deliverability and list health than vanity metrics. The opportunity isn't in competing on features; it's in competing on clarity and trust. Solo founders are willing to pay fairly for a tool that feels honest about what it does and doesn't require them to become email marketing experts.