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End-to-end encrypted notes, tasks, and real-time collaboration wrapped in a stunning, physics-based interface.
Everything you need, secured by default.
Your master key never leaves your device. We couldn't read your notes even if we wanted to.
Invite your team to workspaces. See their cursors and avatars typing in real-time.
Stay on top of your tasks and notes right from your iOS or Android home screen.
Step away with peace of mind. QuillFox automatically drops your decryption keys after inactivity.
Organize everything into private folders and set push notifications for due dates.
Whether you're a developer documenting code, a founder drafting business plans, or a team collaborating on sensitive projects, QuillFox provides the tools you need without compromising your data.
Write beautifully formatted notes with embedded code blocks, tables, and images.
Organize your life into distinct vaults. Share specific workspaces with your team.
Don't just take our word for it.
"As a journalist covering sensitive topics, I can't rely on standard cloud providers. QuillFox's local-first zero-knowledge approach ensures that even under a subpoena, nobody can read my drafts."
Investigative Reporter
"Our law firm handles thousands of confidential M&A documents. Switching to QuillFox gave us peace of mind; the E2EE workspaces perfectly meet our strict data privacy compliance standards."
Partner, Sterling Legal
"I audited the client-side encryption code myself before moving my personal journal here. The PBKDF2 key derivation and AES-GCM implementation is textbook perfect. Truly zero-knowledge."
Security Researcher
Absolutely not. QuillFox uses Zero-Knowledge End-to-End Encryption. Your data is encrypted on your device before it ever reaches our servers. Without your master password, your data looks like random gibberish to us.
Because we don't store your master password, we cannot recover it for you. If you lose it, your encrypted data will be unrecoverable. We highly recommend using a password manager.
When you invite a collaborator to a workspace, QuillFox securely encrypts the workspace's symmetric key using their public key. This ensures only invited users can decrypt and read the workspace contents.
Yes! You can upgrade to Premium or Ultra at any time from the Settings menu. If you downgrade to Free, your extra workspaces will be archived, but you will not lose your data.