ZeroIn treats your emails like tasks — organized, prioritized, and always under control. Multi-platform, security-first, beautiful.
Windows & Android, closed beta now · Works offline · No account required
Most email clients show you your messages. ZeroIn helps you actually act on them — intelligently, securely, and beautifully.
Every email is a task. ZeroIn lets you organize, prioritize, and tag your messages the same way you manage work — with Projects, labels, and a purpose-built inbox view.
Built-in quarantine, automatic SPF/DMARC/DKIM validation, tracking pixel blocking, and three configurable security modes — from relaxed to paranoid. You decide.
One app, every device. Windows, Android, Linux, macOS, iOS, and web — all with a consistent, native-quality experience and your settings synced across all of them.
Every feature in ZeroIn was designed to get out of your way and let you focus on the work that matters.
All your email accounts in one place. Switch between accounts or view everything at once with a single click.
Conversations grouped intelligently, just like Gmail. Never lose track of a discussion again.
Write emails with Markdown — bold, italic, code, tables, inline images. Compose inline or in a full window.
All emails stored locally for instant search and access — even without a connection. Your data, your device.
Multiple themes, dark/light modes, and three layout modes (3-pane, 2-pane, fullscreen) that adapt to your screen.
Instant boolean search across all your email, locally indexed for sub-second results even with thousands of messages.
Save reply templates and signatures with keyboard shortcuts. Stop typing the same things over and over.
Auto-builds your contact list from interactions. Import/export vCard and CSV. Frequency tracking built in.
Every action has a shortcut. Power users can customize every binding from a single settings screen.
ZeroIn's Project system automatically collects the right emails into context-aware workspaces — so everything about a client, initiative, or topic is always one click away.
ZeroIn treats security as a first-class feature, not an afterthought. Unknown senders are isolated automatically, and suspicious emails can't silently track you.
ZeroIn isn't trying to be a prettier Gmail. It's a fundamentally different approach to how you interact with email every day.
| Feature | ZeroIn | Gmail | Outlook | Spark |
|---|---|---|---|---|
| Unified inbox across accounts | ✓ | ~ | ~ | ✓ |
| Project-based organization | ✓ | — | — | — |
| Sender authentication badges (SPF/DMARC/DKIM) | ✓ | ~ | ~ | — |
| Tracking-pixel & remote-image blocking | ✓ | ~ | ✓ | ✓ |
| Local, offline-capable search | ✓ | — | ~ | ~ |
| Full offline access | ✓ | ~ | ~ | ~ |
| Windows + Android + iOS + macOS | ✓ | ~ | ✓ | ✓ |
| Custom themes | ✓ | ~ | ~ | ~ |
✓ Full support · ~ Partial support · — Not available
For ZeroIn, orange ✓ marks features still in active development · Windows & Android in closed beta today, other platforms planned
ZeroIn is free to use during the closed and open beta, with no limits. We'll always have a generous free tier — and we'll be transparent about what comes next.
All features. No credit card. No expiry.
ZeroIn is built with Flutter for a native-quality experience everywhere. Windows and Android are in closed beta today; macOS, iOS, and Linux follow once they've launched.
ZeroIn is actively developed. Click below to see the current roadmap and recent release notes.
ZeroIn for Windows & Android is currently in an invite-only closed beta. Open beta will follow once the closed beta wraps up — for now, the closed beta application below is the only signup available.
We're testing with a small group first. Apply below and we'll email you if you're selected — spots are limited while we work through early feedback.
No spam, ever. We'll only email you about your closed beta application. See our Privacy Policy.
This is the only signup form available right now — there's no separate open beta list yet. macOS, iOS, and Linux are planned for after the Windows & Android launch — see the full platform roadmap ↓
ZeroIn is currently in closed beta for Windows & Android. Apply below and we'll email you as soon as there's a spot — it's the only signup available right now.