Letterloop tech stack
Letterloop is a fun and easy way to create private, group newsletters. Let everyone ask and answer interesting questions about their lives — all over email, no apps.
letterloop.co ↗Checked Sep 2026
The stack
“In terms of the product tech stack, we use Firebase as our backend, React for our frontend, and we process our transactional emails through Postmark .” — the maker, Sep 2022 ↗
On its website: DNS: s1._domainkey.letterloop.co CNAME s1.domainkey.u29359805.wl056.sendgrid.net; DNS: s2._domainkey.letterloop.co CNAME s2.domainkey.u29359805.wl056.sendgrid.n… source · Oct 2026 ↗
On its website: HTTP: app.letterloop.co responds with x-nextjs-prerender source · Oct 2026 ↗
Other
On its website: HTTP: app.letterloop.co responds with x-vercel-id source · Oct 2026 ↗
Built on a similar stack
Products that share the most distinctive building blocks with Letterloop.
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