Email, without the noise

Email, without
the noise.

Xail gives you a clean inbox that only shows verified contacts — and makes every message unreadable to anyone but you and your recipient. No new address. No new app. Just install it and your email is private by design.

Calmer. Smarter. Sealed.

Download for Windows See how it works

macOS and mobile coming soon

Information-theoretic security 3-minute setup

Less noise, more signal.

Professional at her desk — focused, unbothered, protected

Sarah MitchellRe: Settlement terms — revised offer

● secured

The problem

Your email has two problems.
One you see. One you don't.

Spam controls your inbox

Filters catch most of it. Most. The rest buries your real messages. And every filter that works does so by reading everything you receive to decide what's junk.

Every server reads your messages

Your attorney's advice. Your doctor's diagnosis. Your accountant's review. All sitting in plaintext on servers owned by companies that read it, index it, and train AI on it.

The solution

Xail fixes both with one architecture.

Anti-spam

Spam can't reach your secure inbox.

Your Xail inbox only shows messages from verified contacts. Everything else stays in your regular email. No filters to manage. No arms race. No false positives.

Privacy, restored

No one reads your messages.

Xail splits every message into shares and sends each through a different email provider. No single server ever sees the complete message. Not even us.

Xail Inbox

Sarah Mitchell ● secured

Re: Settlement terms — revised offer attached

2:14 PM

Dr. Rajesh Patel ● secured

Lab results — everything looks good

11:30 AM

Jordan Lee

Dinner Friday? That new place downtown.

9:45 AM

Three real messages. Nothing else.

The everyday upgrade

You don't have to handle sensitive data
to want a clean inbox.

Xail works for anyone tired of noise, spam, and the feeling that someone's reading over your shoulder.

47 unread. Three that matter.

Your Xail inbox only shows messages from real contacts. No promotions, no newsletters you forgot to unsubscribe from, no spam. Just the people you actually talk to.

Your conversations, nobody else's.

Coordinating medical care for a parent. Sharing financial details with your spouse. Planning something personal. None of it sitting in plaintext on someone else's server.

Keep your email. Add a layer.

You don't switch to Xail — you add it. Keep Gmail, keep Outlook. Xail works on top of what you already have. Three minutes to set up, nothing to migrate.

The same architecture that protects attorneys protects you.

How do we do it

Split across three.
Zero readable copies.

Xail splits every message into shares sent across your existing email accounts. No single provider ever sees the full message.

Professional working at her desk — browser-first, the product is invisible

Sarah Mitchell

Settlement terms — revised

● secured

Dr. Rajesh Patel

Lab results — confidential

● secured

Newsletter

Weekly digest — 12 articles

Connect your accounts

Link Gmail, Outlook, Yahoo — any combination. Each account becomes a channel that carries one share of every message.

Send like normal

Compose and hit send. The message splits into shares and each travels through a different provider. No provider sees the whole message. When your recipient is online, shares arrive in under a second — faster than a text message. Email providers serve as the permanent cryptographic record.

Read on your device

Shares reconstruct automatically — only on your screen. The colored line — blue and green — confirms it's secure. The math guarantees it.

Visual security

See your protection
at a glance.

Every message shows a colored border that tells you exactly how secure it is. No jargon. No settings. Just a line that means something.

Xail Inbox

Sarah Mitchell ● secured

Re: Settlement terms — revised offer attached

2:14 PM

Dr. Rajesh Patel ● secured

Lab results and treatment plan — confidential

1:47 PM

Newsletter Weekly

Your weekly digest — 12 new articles

12:30 PM

Blue — 2 addresses

Information-theoretically secure. No single provider can read your messages. A spammer needs both addresses and coordinated delivery.

Green — 3 addresses

Secured and fault-tolerant. If one provider goes down, your messages still arrive. Two protects. Three guarantees.

AI Search

Ask Kaia anything.
On your device.

Search your messages with natural language — "What did Sarah say about the contract?" Kaia searches your messages using AI that runs directly on your device. Your messages never leave your machine. Not even for search.

Zero cloud processing

When Kaia searches your messages, AI runs entirely on your device. No server, no API calls, no data leaving your machine. The model downloads once and stays local.

Natural language search

"What did John say about the contract?" — ask naturally and get answers with source messages. Not just keywords.

Smart summaries & action items

AI-generated summaries and follow-up extraction, processed entirely on your device. All stored encrypted locally.

One assistant, two modes

Ask Kaia about your messages — she searches locally. Ask about Xail — she helps with the product. One input, privacy-aware routing, zero confusion.

Ask Kaia

What did Sarah say about the settlement?

Kaia · Searched on your device

Sarah proposed a revised settlement of $2.4M with a 60-day closing window in her March 3 message. She asked you to review the liability clause in Section 4 before Thursday.

Sarah Mitchell ● private

Re: Settlement terms — revised offer

2:14 PM

Desktop app

Your inbox runs
on your machine.

Not a browser tab. A native app that stores secrets in your OS keychain, starts with your computer, and keeps AI running locally. Your messages never touch a server.

Secrets in your OS keychain

OAuth tokens and encryption keys live in Windows Credential Manager — not in browser storage. Even if someone copies your files, they can't access your accounts.

On-device AI, always ready

Kaia runs AI models directly on your hardware — summaries, search, action items. No cloud, no API calls. The model loads once and stays resident.

System notifications

Secure messages arrive as native desktop notifications. No browser tab to keep open, no background service worker. Just your OS doing what it does best.

Starts with your computer

Xail launches at startup and polls in the background. Secure messages are reconstructed the moment they arrive — not when you remember to open a tab.

Windows

Coming soon

Download

macOS

Coming soon

iOS

Planned

Android

Planned

Xail

Inbox

Ask Kaia...

Sarah Mitchell secured

Re: Settlement terms — revised offer

2:14 PM

David Reeves secured

Lab results — follow-up recommended

1:48 PM

Jennifer Kwon secured

NDA draft v3 — ready for signature

11:22 AM

34 other messages

Google Calendar

Reminder: Team standup at 3:00 PM

10:00 AM

5 people viewed your profile this week

9:15 AM

Who it's for

Built for professionals who
handle sensitive communications.

Xail works for anyone, but it's designed for people who need provable privacy — not as a feature, but as a professional obligation.

Legal

Attorneys

Send settlement terms, case strategies, and privileged documents without a second thought. Solo practitioners and small firms adopt in minutes — no procurement, no IT department.

"I stopped thinking about whether my emails are secure. The green border just means they are."

Healthcare

Doctors & Clinics

Share lab results, referrals, and treatment plans the way you'd hand them across a desk. Setup takes minutes, not an enterprise contract.

"My patients' data never touches a third-party server. That's not a feature — that's how it works."

Who it protects

The only email AI your compliance officer
will approve.

Cloud-based email AI processes your content on third-party servers. For attorneys, doctors, and financial advisors, that's not a preference gap — it's a compliance barrier.

Legal

Attorney-client privilege, enforced by architecture.

Cloud email AI processes your privileged communications on third-party servers. Bar associations have flagged this as a Rule 1.6 risk. Xail's AI never leaves your device.

ABA Model Rule 1.6 — no exceptions

Healthcare

HIPAA compliance without the enterprise contract.

Processing patient communications through a cloud AI requires a Business Associate Agreement. Most email providers' standard terms don't qualify. Xail never becomes a business associate — it never sees your data.

No BAA required for consumer use.

Finance

Client data stays off third-party servers. Full stop.

SEC Rule 17a-4 and FINRA create record-keeping obligations when trading communications flow through third-party AI. Xail processes everything on-device. No data flow, no obligation triggered.

Supports SEC Rule 17a-4 requirements

Xail's AI can do things with your email that cloud-based email AI is not legally permitted to do.

Download for Windows

Why Xail

We don't ask you to trust us.
We eliminated the need.

No plaintext on our servers. No keys to manage. No new email address. Just provable math running silently on your device.

Zero-knowledge architecture

We never see your messages. Reconstruction happens on your device. A breach of our systems exposes nothing because we store nothing.

Works with your email

Keep Gmail. Keep Outlook. Xail is a layer on top, not a replacement. No new address, no migration, no behavior change.

Published, auditable cryptography

XorIDA is a patent-protected threshold sharing algorithm over GF(2). The math is verifiable. Any claim we make is independently provable. Trust earned by eliminating the need for it.

Instant delivery. Even our servers learn nothing.

When both parties are online, your message arrives in under a second — split across independent paths before touching any server. In the rare case a relay is needed, it sees only one share: not weak encryption, not ciphertext — mathematically provable random noise. There is no key to steal because there is no key. The split is the security.

Secure inbox is spam-free by design

To send a Xail message, a spammer would need all your email addresses and must deliver coordinated shares through every provider simultaneously. Your secure inbox only shows verified contacts.

Email, withoutthe noise.

Install Xail.Your email, truly private.

Email, without
the noise.

Install Xail.
Your email, truly private.