COSigna — Sign documents the server never sees

This site was found by StackScope Discovery, our own first-party launch detection. The tech stack below comes from that discovery scan; the full analysis (screenshots, scores, page checks) is added when the site is picked up by a launch platform.

COSigna — Ring Certified mutual face attestation, Bitcoin-anchored, verifiable offline. Sign confidential documents the server never sees. No account, no credentials.

Crypto

Added August 2, 2026 · Last analysed August 2, 2026 · via StackScope Discovery

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StackScope is a free public catalogue of indie launches. We find launches on Product Hunt, Hacker News and similar feeds, then crawl each site to detect its tech stack and score it for launch readiness: DNS, security headers, SEO basics. This page is what we saw on 2 August 2026; the live site may have changed since.

Tech Stack (9)

Infrastructure

DNS	OVH DNS
Protocol	HTTP/3
Security	HSTS
Server	Caddy
Server	Uvicorn

Business email	OVH Email

Commerce & Payments

Crypto	OpenTimestamps
Web3	Blockstream
Web3	Mempool.space

Security Headers (5/6)

✓

Strict-Transport-Security

✓

Content-Security-Policy

✓

X-Frame-Options

✓

X-Content-Type-Options

✓

Referrer-Policy

✗

Permissions-Policy experimental (check browser support)

–

X-XSS-Protection deprecated (use Content-Security-Policy)

Something not look right? If a technology shown here is wrong or out of date, email [email protected] and we'll review it.