End-to-end encrypted note-taking app: Your second memory. Private by design.

Find any note by what it was about, who was involved or roughly when. Every note is encrypted on your device, so only you and the people you share with can read it.

Sign in with Google. Unlock with biometrics, like your fingerprint.

What you see

Kees expects a budget freeze in Q4. Not announced, so keep it to yourself.

09:15

@Kees#work
What the server sees

q8Zl0fR2vKc9xH4mWbT1eYpA7sNg3uJd6LoQiC5yXzE0rVhB8nGt2kPw9aMfU1jSe4DcO7lY3xRbK6vHq0ZmT5sLgW2pN8uAiJ…

Why MnemoNotes

Notes are only useful if you can find them again

Most notes get lost in folders you never open. MnemoNotes makes capturing effortless and finding things natural.

Capture in seconds

Press Alt+N and start typing. Tag the note with the people and topics it is about as you go, then save with one shortcut.

Find it the way you remember it

“Sam recommended a book, sometime in spring.” Filter on @Sam, #books and a date range, or just type words from the note.

On every device, even offline

Your notes live on your device first. Read and write without a connection; changes sync in the background when you are back online.

See all features →

Privacy

Your notes are sealed before they leave your device

Syncing usually means trusting a company with your data. With MnemoNotes the server only ever receives locked boxes it has no key for.

1 · Your device

Encrypts and signs

Every change is locked with keys that exist only on your devices, and signed so nobody can forge it.

2 · The server

Stores what it cannot read

It keeps the sealed changes in order and passes them on. It never sees your text, tags, titles or search terms.

3 · Your other devices

Unlock and rebuild

Your phone or laptop unlocks with a passkey, opens the boxes and puts your notes back together, locally.

Read exactly how it works →

What the server cannot do

MnemoNotes is built with full privacy in mind

This is not just a promise in a policy. It is how the app is built: the keys that open your notes never reach the server.

The server can’t:

  • Read your notes. It only stores encrypted data.
  • See how you tag and organise them. People, topics and folders are encrypted too.
  • Search your notes. Search runs on your device; your queries never reach it.
  • Hand your notes over. Whoever gets hold of the database gets encrypted data only.
  • Slip in fake changes. Every change is signed by the device that made it, and your devices check.

Together

Share with the people you choose

A team’s decisions, in one place

Keep your team’s decisions in a shared document. Every note in it is shared with every member, so the reasoning behind each choice stays next to it.

  • New members catch up. Someone who joins today can read every decision back to the first one.
  • People who leave lose access. Nothing added or changed after they leave reaches them.
  • Edits have a name on them. Each note’s history shows who changed what, and an earlier version can be restored.

Keep a team decision log →

Platform team decisions

Shared with 4 people 4 notes
SHARED DOCUMENT

Today · Sep 27

10:42

@Priya#payments

Retry failed payments for 3 days, not 7
Almost every retry that succeeds does so within 48 hours. After that we only annoy customers.

Yesterday · Sep 26

15:10

#infrastructure

Move background jobs to a queue
Cron jobs overlapped twice last month. A queue gives us retries and one worker per job.

Wednesday · Nov 12, 2025

09:25

@Ravi#architecture

Postgres over DynamoDB
We need joins for reporting, and the load test held at 3× today’s traffic. Revisit if writes pass 5k/s.

Tuesday · Jun 10, 2025

11:03

→ Release checklist

Ship a release every Tuesday
Smaller releases are easier to roll back. Hotfixes can still go out any day.

Maya joined the team this week. Every decision back to 2025 is already there for her.

Share a note

A packing list with your partner, a reading list with a friend, meeting notes with a colleague: add a contact with a one-time invite link, then share notes with them as an editor or a viewer. They get the key; the server doesn’t.

Your data stays yours

Import an Obsidian vault, and export your notes at any time as plain text, JSON or Markdown files. All on your device.

Use it for

One app for all your notes

Personal or for work, a one-line reminder or a long document: every note is written, found and encrypted the same way.

Quick notes and ideas

A phone number, a gift idea, a thought on the way home. Jot it down in seconds.

Plans and projects

Trips, a renovation, recipes to try. Collect the notes in one document.

Study and reading notes

Lecture notes, book highlights and research, found again by topic.

A private journal

Write for yourself only, with nobody else able to read along.

Meeting notes

Find every conversation with someone in one filter before you talk again.

A team decision log

A shared document that keeps every decision and the reasoning behind it.

A private place for everything you want to remember

Sign in with Google, save your recovery key, and write your first note.