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Zero-knowledge file/paste/poll/chat sharing for anyone who canโt trust Drive/Slack/WhatsApp with sensitive stuff. Client-side AES-256-GCM; keys live in the URL fragment (server never sees content or metadata); no accounts/PII/phone numbers. Runs on Cloudflare Workers with region pinning. Pricing: pay-per-use credits (per GB uploads, per secure paste/chat/poll), bulk credit packs for frequent users. Target: lawyers/healthcare/M&A contractors/agency folks needing one-off or short-lived private exchanges; supports group chat but no team workspace. Moat: true zero-knowledge (only encrypted blobs to subpoenas), compliance-friendly regions, link-based flows with no signup
Privsen
CherryTreeCherryTree is ideal for students, writers, researchers, and anyone who needs to manage complex information in a structured manner. It is particularly suitable for individuals who appreciate hierarchical organization and who may require the functionality to include various types of content in their notes.
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Privsen's answer
Zero-knowledge by default: client-side AES-256-GCM, keys in the URL fragment, no accounts/PII/phone numbers, no metadata logging. We literally cannot decrypt your content or comply with data requests beyond handing over encrypted blobs.
Privsen's answer
If you need to share up to 15GB files, notes, polls, or chats without trusting a provider, Privsen keeps keys client-side and doesnโt require identity. No server-stored keys, no hidden backups, no data monetizationโjust pay-per-use credits.
Privsen's answer
People and teams handling sensitive exchanges without wanting Drive/Slack/WhatsApp involved: lawyers, healthcare contractors, M&A/agency folks, security-minded individuals needing short-lived, private links.
Privsen's answer
We built Privsen after seeing โencryptedโ services still log metadata, store keys, and wipe accounts via bots. We wanted a tool that is blind by design: keys stay with the user; providers canโt read, track, or sell data.
Privsen's answer
Next.js, React, TypeScript, Hono, R2, KV, D1 Web Crypto API (AES-256-GCM, HKDF).
Privsen's answer
Early-stage; privacy-focused professionals and small teams using pay-per-use credits.
WeTransfer - WeTransfer is a free service to send big or small files from A to B.
Zim Wiki - Zim is a graphical text editor used to maintain a collection of wiki pages. Each page can contain links to other pages, simple formatting and images.
file.io - Ephemeral file sharing
Cryptee - Cryptee is a safety and privacy focused, encrypted and cross-platform personal data storage service. You can write personal documents, notes, journals, store photos and all sorts of other files.
One-Time Secret - One-Time Secret is a way to share sensitive information simple and secure.
Trilium Notes - Trilium Notes is a hierarchical note taking application.