Stop drowning in your inbox. ZeroIn treats your emails like tasks — organized, prioritized, and always under control. Multi-platform, security-first, beautiful.
Free to download · Works offline · No account required
Most email clients just display your messages. ZeroIn helps you actually deal with 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 |
|---|---|---|---|---|
| Project-based organization | ✓ | — | — | — |
| Automatic quarantine | ✓ | ~ | ~ | — |
| SPF / DMARC / DKIM display | ✓ | ~ | — | — |
| Tracking pixel blocking | ✓ | — | — | ✓ |
| Full offline access | ✓ | — | ~ | ~ |
| Windows + Android + iOS + macOS | ✓ | ~ | ✓ | ✓ |
| Custom themes | ✓ | — | — | — |
| Task-based email workflow | ✓ | — | — | ~ |
✓ Full support · ~ Partial support · — Not available
ZeroIn is built with Flutter, giving you a native-quality experience on every platform — desktop, mobile, and web.
ZeroIn is free to download and use right now, with no limits. We'll always have a generous free tier — and we'll be transparent about what comes next.
All features. All platforms. No credit card. No expiry.
ZeroIn is actively developed. Click below to see the current roadmap and recent release notes.
Download ZeroIn free today and take back control of your inbox.