Lookout
Lookout: A free, open-source Linux client that brings email, calendars, contacts, and tasks together. Ranked #73 of 142 in Email Clients by our editors (3.0/10); pricing: Free plan; best for linux users needing integrated mail and calendars.
At a glance
- Editor score3.0 / 10
- PricingFree plan
- Best forLinux users needing integrated mail and calendars
- Free planYes
- Paid fromFree
- App coverageDesktop
- Facts checked20 Sep 2026
Where it wins
- Combines IMAP email, CalDAV calendars, CardDAV contacts, and Google Tasks
- Offline cache, live IDLE updates, and local FTS5 full-text search
- Rich HTML composition with images, tables, links, and attachments
Where it doesn't
- Linux-only desktop coverage limits platform flexibility
- No AI features for assisted email workflows
- The feature set does not include a stated maximum account limit
Our verdict on Lookout
Lookout is a native GNOME desktop email client for Linux users who want email, calendars, contacts, and tasks in one application. It connects through GNOME Online Accounts or direct IMAP and SMTP configuration, supports multiple accounts with live IDLE updates, and stores a local cache for offline reading. The application is free and open source under the GPL-3.0-or-later license, with distribution through Flatpak, Snap, Debian, and Fedora packages. It is a practical fit for people invested in the GNOME desktop and open-source software, especially when calendar and contact access matter alongside email.
Its strongest advantage is breadth within a focused desktop workflow. Email includes local SQLite FTS5 full-text search, rich HTML composition, inline images, tables, links, and attachments. Calendar support covers CalDAV with month, week, day, agenda, and split views, while CardDAV adds contact groups, favorites, and import/export. Google Tasks support extends the application beyond mail and calendar. Integrations include GNOME Online Accounts, Google, Microsoft 365, and Nextcloud, giving users several account and service paths without requiring a separate calendar or contacts application.
Lookout also emphasizes local access and safer message rendering: offline use comes through its local cache, and WebKit rendering is sandboxed with remote images blocked by default. The main trade-off is platform scope, since the product targets Linux rather than a broader desktop set. AI features are not included, and the published feature set does not describe a unified inbox or scheduled sending. Choose Lookout for a free GNOME-centered workspace with integrated mail, calendar, contacts, and tasks; choose another client if cross-platform availability, AI assistance, or those specific workflow features are priorities.
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Lookout pricing
Lookout fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| App coverage | Desktop |
| Account limit | Not verified |
| Unified inbox | Not verified |
| Offline access | Yes |
| Scheduled sending | Not verified |
| Calendar tools | Yes |
| Deployment | Desktop |
| Platforms | Linux |
| Support | Docs |
| Built for | Solo, Small business (editorial estimate) |
| Integrations | 9 integrations: GNOME Online Accounts, IMAP, SMTP, CalDAV, CardDAV, Google Tasks … |
| Pricing | Free plan |
| Website | lookout-mail.com |
| Facts checked | 20 Sep 2026 |
Lookout integrations
Lookout lists 9 integrations on its own site.
- GNOME Online Accounts
- IMAP
- SMTP
- CalDAV
- CardDAV
- Google Tasks
- Microsoft 365
- Nextcloud
Alternatives to Lookout
- Mozilla ThunderbirdA capable free client for multi-account email, offline access, and desktop productivity tools.9.4
- Zoho MailA flexible hosted email service with free access, migration tools, and Zoho collaboration options.9.2
- Apple MailA capable Apple-focused email client with unified inboxes, scheduling, privacy controls, and AI assistance.9.1
See all Lookout alternatives →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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