Messaging that keeps your conversations yours, not ours.
Quanta is an encrypted messaging platform for individuals and teams who take privacy seriously. Signal-grade encryption, self-hostable, and built to last.
Free forever for individuals. No credit card required.
What's included
Everything you need to communicate securely
Built for individuals who value their privacy and teams who need enterprise-grade security without the enterprise complexity.
End-to-End Encryption
Your messages are encrypted on your device and can only be read by the people you sent them to. Not by us, not by anyone who takes our servers.
Group Messaging
Create groups of up to 500 members. Threaded replies, mentions, reactions, and pinned messages.
Secure File Sharing
Share photos, videos, and documents. Attachments are encrypted in transit and at rest on our storage. End-to-end encrypted attachments — where the keys never reach us — are on the roadmap.
Voice & Video Messages
Record and send encrypted voice notes and video messages. Transcoded for every device, readable only by the people you sent them to.
Voice & Video CallsComing soon
Realtime encrypted calling, 1:1 and group — with the media encrypted end to end before it ever reaches a relay. In design; not available yet.
On-Device SafetyComing soon · iOS first
Warnings for explicit imagery and grooming patterns, running entirely on your phone — the analysis never leaves the device and we never see the content. Built on the Heimdall Guard safety models (heimdall.nooz.ai). iOS first; Android to follow.
Encrypted Stream Plane
Reach systems behind firewalls without opening a port. Both endpoints dial out to a relay that pairs them and forwards ciphertext it cannot read — for remote access, secure connectors, and system-to-system links.
Self-HostingComing soon
Run Quanta on your own infrastructure — packaged charts, signed images, and a documented container security model. In preparation; talk to us if you need it.
Open Standards
X3DH key agreement and ChaCha20-Poly1305 (RFC 8439) — named, published cryptography, not our own invention. Our wire format and golden test vectors are documented so integrators can verify interoperability.
How it works
Up and running in minutes
No complex setup, no training required. Private by default, simple by design.
Create your account
Verify your phone number so people can find you — stored as a cryptographic hash, never shared with other users. Phone-optional sign-in is coming, for people who would rather not hand one over at all. No ads. No data collection.
// Create your account
No credit card. No ads. No BS.
Invite your team
Share your invite link or QR code. Contacts are discovered using cryptographic hashes — your address book never touches our servers.
// Invite via cryptographic contact discovery
Scan to connect securely
Start messaging
Messages are encrypted on your device before sending. Read receipts, reactions, and threads. Works offline.
Reach systems behind the firewall — without opening one.
Quanta's stream plane carries far more than chat. Two endpoints each dial outbound to a relay that pairs them by session id and forwards ciphertext it cannot read. No inbound port. No VPN. No trusted middlebox holding your keys.
That gives you an encrypted, multiplexed channel between two systems that neither we nor the network in between can inspect — for remote administration, machine-to-machine links, and connectors into environments that are not supposed to be reachable from the internet.
Outbound only
Both sides dial out. Nothing to expose, nothing to port-forward, nothing new to defend.
Blind by construction
The relay pairs sessions and moves bytes. It never parses, decrypts, or stores what passes through it.
Published contract
A documented wire format with golden test vectors, so an integrator can build against it and verify byte-for-byte.
Works with the rest of the toolkit
Quanta is the secure transport layer for NT's agent products. These integrations are in progress.
CallCraft
Coming soonAI voice agents that can hold a real conversation.
Bridge CallCraft agents into Quanta conversations as first-class, keyed participants — so an agent takes part under its own identity rather than through a shared backdoor. Encrypted on the same terms as everyone else in the room.
Learn more about CallCraftClawCraft
Coming soonAutonomous agents that do the work, not just the talking.
Give agents a scoped, revocable identity inside Quanta so they can act on your behalf in a conversation — with every action attributable to the agent, and nothing readable by us in transit.
Learn more about ClawCraftProtecting your child shouldn't mean giving up your own privacy
Most services make you choose: encryption for everyone, or oversight for everyone. That is a false choice, and it is the wrong one for parents — who reasonably want private conversations with their partner and visibility into their nine-year-old's.
We do it by adding a guardian to the conversation — as a visible participant, encrypted to like anyone else — instead of handing ourselves a key to everything. The difference matters: a chaperone everyone can see is not the same as a listening device.
Nothing is hidden
When a guardian can see a conversation, they appear in it — listed for everyone, on both sides. There is no invisible observer, and no way to turn one on quietly.
We still cannot read it
Oversight adds a person to the conversation. It does not give us a key. Your family's messages stay encrypted to the people in them — we are not one of them.
Your own chats are untouched
Watching over a child's messages does not weaken yours. Same account, same encryption, no mode to switch. Your conversations with everyone else remain end-to-end encrypted.
Paired with on-device safety warnings that run on the phone itself, so a child can be warned about explicit images or grooming patterns without anyone — including us — reading their messages.
Straight answers
What end-to-end encryption actually means for you
Real encryption has consequences, and some of them are surprising. We would rather you read them here than discover them later.
- Each of your devices has its own key
- Your phone, tablet and laptop each generate their own encryption key, which never leaves that device. When someone messages you, their app encrypts a separate copy for each of your devices. Nothing is ever encrypted to an account, a password, or to us — which is why we cannot read any of it.
- Messages and attachments are protected differently — today
- Message text is end-to-end encrypted: the keys exist only on your devices, so we cannot read it. Attachments are encrypted in transit and encrypted at rest in our storage, but the keys for that are currently managed by us — which means, unlike your messages, we technically could. We are moving attachments to the same end-to-end model, and we would rather tell you where the line is today than let you assume it sits somewhere it does not.
- A brand-new device starts fresh
- Because messages were encrypted to the devices you had at the time, a device you add later cannot read what came before it — even though we may still be storing it. That is not a limitation we chose; it is what end-to-end encryption means. Anything that let a new device read old messages would also let an attacker who stole your account do the same.
- Adding a device needs a device you already have
- New devices are approved from one you are already signed in on. Signing in alone is not enough. That way, someone who compromises your login still cannot silently add a device and start receiving your messages.
- How long we keep messages
- We hold encrypted messages so your devices can sync and catch up when they come back online. When that period ends we delete our copy — we never needed to read it to delete it. This does not remove messages already on your own devices; those stay until you delete them.
- If you lose every device
- Your account, contacts and groups survive — you sign in and carry on. Your message history does not: it was readable only by devices that no longer exist. We would restore it if we could, but we have no copy of your keys. Encrypted backup you control is on the roadmap.
Pricing
Simple, transparent pricing
No hidden fees. Cancel anytime. Free forever for individuals.
Free
For individuals who value privacy.
- Unlimited 1:1 messaging
- Large group chats
- 1 GB media storage
- iOS, Android & Web
Pro
For power users and small teams.
- Everything in Free
- Larger groups & media storage
- Extended message history
- Priority support
Enterprise
For organizations that need full control.
- Everything in Pro
- Unlimited members & storage
- Unlimited message history
- Self-hosting option (in preparation)
- SSO / SAML
- SLA & dedicated support
Ready to take back your privacy?
Join thousands of individuals and teams who have made the switch to truly private messaging.
Get started free →Free forever for individuals. No credit card required.