21st tech stack
Infra and UI building blocks for the agentic internet
21st.dev ↗Checked Sep 2026
The stack
“The only option for modern SEO-ready monorepo fullstack web apps that allow you to ship 10x faster” — the maker, Sep 2026 ↗
On its website: HTTP: dashboard.21st.dev responds with x-nextjs-prerender; HTTP: 21st.dev responds with x-powered-by: Next.js source · Oct 2026 ↗
“We love Supabase because it allows us to ship pro fullstack apps with Postgres 10x faster.” — the maker, Sep 2026 ↗
On its website: DNS: clerk.21st.dev CNAME frontend-api.clerk.services; DNS: accounts.21st.dev CNAME accounts.clerk.services source · Oct 2026 ↗
On its website: DNS: resend._domainkey.21st.dev TXT (record present) source · Oct 2026 ↗
On its website: Homepage loads res.cloudinary.com source · Oct 2026 ↗
Other
On its website: HTTP: 21st.dev responds with x-vercel-id; HTTP: www.21st.dev responds with x-vercel-id source · Oct 2026 ↗
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