·9 min read
Resend Open-Sourced Templates First, Then Sold Inboxes
From React Email on GitHub to a YC W23 email API: how Zeno Rocha and Bu Kinoshita's Next.js/Vercel playbook—not a naming scorecard—turned developer template pain into $3M seed and $18M Series A gravity versus SendGrid, Postmark, and Mailgun.