Rob Hallam(@robj3d3):Open source is the future of SaaS. @marclou built his newsletter tool with a few prompts in Opus 5.5, which means anyone can. Code is no longer a moat. So you might as well give it away and let it be your free marketing. There will always be lazy people who’d rather pay you to host it. @wickedguro did exactly this with Postiz and it now makes $245k MRR.

2026.10.10 14:54

Open source is the future of SaaS. @marclou built his newsletter tool with a few prompts in Opus 5.5, which means anyone can. Code is no longer a moat. So you might as well give it away and let it be your free marketing. There will always be lazy people who’d rather pay you to host it. @wickedguro did exactly this with Postiz and it now makes $245k MRR.

Marc Lou@marclou

2026.10.10 13:51

So many people asked me to make it open-source, so here you go: MailCheap — Self-hosted newsletters on Amazon SES: 💸 $0.10 per 1,000 emails ✍️ Editor with live preview 📰 Multiple newsletters 📝 Signup forms + API 🌐 Public archive 📊 Stats & growth charts 🧹 List cleanup 📬 Bounce + spam protection → 92% cheaper than Beehiiv (for me). Have fun!