Cryptee

Cryptee encrypts on your device before anything is uploaded, which means the servers hold ciphertext and the company operating them cannot read a word of your documents or see a single photograph. That is a different guarantee from a promise not to look, and it is the whole reason to choose it.

It covers documents and photographs in one place — a rich text editor with Markdown and LaTeX support for anyone writing anything mathematical, document linking, and encrypted photo storage that most encrypted note tools do not attempt. For journals, medical records, legal notes, research or anything else that would be genuinely damaging to leak, the combination is unusual.

Cryptee operates from Tallinn under Estonian and EU jurisdiction, with a free tier and paid storage plans, and its client is open source so the encryption is inspectable rather than asserted. The costs of zero-knowledge are the ones that always apply: search is inherently more limited when the server cannot read the content, collaborative editing is not the point, there are no integrations to speak of, and losing your key means losing the documents — nobody can reset it for you.

What Cryptee does well

• Client-side encryption — the server holds only ciphertext
• Documents and encrypted photo storage in one place
• Markdown with LaTeX support for technical writing
• Open-source client, so the encryption is inspectable
• Estonian company, EU jurisdiction, free tier available

Where Cryptee falls short

• Search limited by design when the server cannot read content
• Not built for real-time collaboration
• Few integrations with other tools
• Lose your key and the documents are gone

Standout feature. The company running it cannot read your documents — which is the only version of privacy that needs no policy.