Business messaging that is
actually private.
Quill is a zero-knowledge, end-to-end encrypted messenger for teams that take confidentiality seriously. Your messages, calls and files are encrypted on your device — our servers only ever see ciphertext.
No card needed. Set up your workspace in two minutes, then invite your team.
Get the apps
Everything a private team needs
Fast, familiar messaging — without giving up an inch of confidentiality.
End-to-end encryption
Every message is protected with the Signal Protocol — X3DH key agreement and the Double Ratchet with perfect forward secrecy. Keys never leave your devices.
Zero-knowledge server
The server is a blind relay. It stores no message content, ever — undelivered messages wait as encrypted blobs and are purged the moment they're delivered.
Encrypted voice calls
Crystal-clear one-to-one calls secured with DTLS-SRTP. No one between you and the other end can listen in.
Disappearing messages
Self-destructing messages, one-time view media, and a full ephemeral mode that keeps no history on your device at all.
Private groups
Encrypted group chats with member verification, admin-only posting, and encrypted file, photo and voice sharing.
Android, iOS & Windows
Native apps for your phone and your desktop, kept in sync — with privacy-respecting push notifications that never contain message content.
Locked at the door
PIN or biometric lock before the app opens, automatic locking on inactivity, screenshot blocking, and encrypted local storage (SQLCipher).
You stay in control
Your own administrator creates every account and can suspend it, wipe a lost device, or erase the whole workspace in one click. No phone-number harvesting, no contact upload, no ads, no trackers.
Security, by design
Quill was built zero-knowledge from the first line of code — not retrofitted.
Signal Protocol
X3DH key agreement + Double Ratchet for every conversation, with perfect forward secrecy and post-compromise security.
Modern cryptography
AES-256-GCM encryption, X25519 key exchange, Ed25519 signatures — via the audited libsodium library.
Keys stay with you
Private keys are generated on your device and never transmitted. The server cannot decrypt anything, even under compulsion.
Minimal metadata
No contact-list upload, no analytics SDKs, no advertising identifiers. Audit logs hold connection metadata only.
Closed by design. Members join only through their workspace
administrator, so you always know exactly who can reach you. Every member signs in
as name-yourworkspace; nobody outside your workspace can find or message you.
Simple per-user pricing
Every plan starts with a free 14-day trial of the full product. No card, no sales call. Pay by card, UPI or net banking; GST invoices included.
Team
- End-to-end encrypted chat, calls and files
- Groups up to 50 members, calls up to 8
- Disappearing messages and one-time media
- PIN and biometric lock, screenshot blocking
- Admin panel: create, suspend and manage users
- Attachments up to 25 MB
Minimum 3 users.
Start free trialBusiness
- Everything in Team
- Groups up to 250 members, calls up to 25
- Remote wipe of a lost or leaving employee's device
- Hidden chats and disguise controls
- Attachments up to 50 MB
- Priority support
No minimum.
Start free trialEnterprise
- Everything in Business
- Unlimited groups and call participants
- Self-hosted on your own servers with a signed licence
- Audit logs and enforced two-factor sign-in
- Attachments up to 100 MB
- Dedicated onboarding and support
From 50 users.
Talk to usPrices in INR excluding GST; USD pricing (from $4 per user per month) is available at checkout for teams outside India. Cancel any time from the admin panel; access continues to the end of the paid period.
Set up your workspace in two minutes
Pick a workspace name, confirm your e-mail, invite your team. Your first 14 days are free.
Start your free trialAlready have a workspace? Sign in to the admin panel