Why Sentinmail

The idea came from a simple frustration. I was paying close to $80/month for about 5,000 subscribers with a popular email tool. One day I looked up what it actually costs to send the same volume through your own SMTP: roughly $3. That's a 25x markup just for a UI and some automation logic.

I kept thinking, what if there was a platform that gave you the full experience - visual email builder, campaigns, automations, analytics; But let you plug in your own SMTP provider? You'd get the same power without the per-subscriber tax that punishes you every time your list grows.

So I started building SentinMail. The early version was just a campaign sender with SMTP config. But the more I used it, the more I realized people need the full toolkit to actually switch, a proper drag-and-drop builder, subscriber management, segmentation, scheduled sends, bounce handling, team access. A half-solution wouldn't get anyone to switch.

The biggest evolution was the email builder. I initially tried a simple block editor, but emails are notoriously hard to render across clients. I ended up building the builder on top of MJML, which handles the responsive HTML nightmare. That decision changed everything - suddenly the emails looked professional on every device without writing a single line of HTML.

The approach evolved from "build a cheaper alternative" to "build a platform that respects the user." No per-email fees. No pricing traps when your list grows. Bring your own SMTP, control your own infrastructure, own your own data.

I'm launching today because the core is solid - campaigns, builder, automations, subscriber management, team collaboration, analytics, api access. But I'm here for honest feedback. What's missing? What would make you switch? That's what I want to learn from this community.