I built an open-source email verification API: [link redacted]. It checks if an email exists without sending any email.
I released the open-source lib some years ago, and built a Saas only this year in April. It started generating revenue (~$100MRR) since September, and I'm not really touching it anymore.
I released the open-source lib some years ago, and built a Saas only this year in April. It started generating revenue (~$100MRR) since September, and I'm not really touching it anymore.