“I just got to nail down this one niche and if I do it then I have the opportunity to grow to other niches as well whatever you love we want to be there”

Niche down, then expand by integration surface, not by market

Resend didn't try to invent email — they took 'an existing problem and a new spin on it' for one niche (developers). Growth came from meeting the niche inside tools they already love: Laravel, Symphony, Cloudflare Workers, Rust SDK. Each integration is content marketing the partner amplifies. Maintain a public integrations roadmap — even unfashionable runtimes (PHP, Rust) — and ship official adapters in collaboration with maintainers.