Hylki
Hylki: Free, open-source Linux email with privacy controls and unified account support. Ranked #76 of 142 in Email Clients by our editors (3.0/10); pricing: Free plan; best for open-source Linux email with privacy controls.
At a glance
- Editor score3.0 / 10
- PricingFree plan
- Best forOpen-source Linux email with privacy controls
- Free planYes
- Paid fromFree
- App coverageDesktop
- Facts checked20 Sep 2026
Where it wins
- Unified inbox supports multiple IMAP and POP3 accounts
- OpenPGP encryption, tracker protection, and remote-content blocking
- Scheduled sending, cloud attachment links, filters, and tags
Where it doesn't
- Available only on Linux desktops
- No AI features or calendar support
- Primarily distributed as a Flatpak for x86_64 and ARM64 systems
Our verdict on Hylki
Hylki is a free, open-source desktop email client for Linux, designed for GNOME. It suits people who want one local application for multiple IMAP and POP3 accounts, with a unified inbox, OAuth sign-in, conversation threading, search, and full folder management. GNOME Contacts integration and recipient autocomplete support contact handling, while system-keyring credential storage keeps account access within the desktop environment. Hylki is primarily distributed as a Flatpak for x86_64 and ARM64 systems.
Its strongest area is privacy-conscious email workflow. Hylki supports OpenPGP-encrypted and signed email, mail filters, tags, remote-content blocking, and tracker protection. Scheduled sending works through an editable Outbox, and supported storage services can provide cloud attachment links through Nextcloud, ownCloud, OpenCloud, OneDrive, Dropbox, and Seafile. GNOME Online Accounts and GNOME Contacts add further fit for GNOME desktops, while OAuth sign-in covers Google, Microsoft, and custom providers.
The trade-off is a narrow platform and feature focus. Hylki is built for Linux desktop email rather than cross-platform coverage, and it does not include AI features or calendar support. The free open-source model makes it a practical choice for Linux users who value local workflows, account consolidation, privacy controls, and encryption. Users who need Windows, macOS, mobile apps, or an integrated calendar should choose a different email client.
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Hylki pricing
Hylki fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| App coverage | Desktop |
| Account limit | Not verified |
| Unified inbox | Yes |
| Offline access | Not verified |
| Scheduled sending | Yes |
| Calendar tools | Not verified |
| Deployment | Desktop |
| Platforms | Linux |
| Support | Community |
| Built for | Solo, Small business (editorial estimate) |
| Integrations | 8 integrations: GNOME Online Accounts, GNOME Contacts, Nextcloud, ownCloud, OpenCloud, OneDrive … |
| Pricing | Free plan |
| Website | hylki.hyprlab.co |
| Facts checked | 20 Sep 2026 |
Hylki integrations
Hylki lists 8 integrations on its own site.
- GNOME Online Accounts
- GNOME Contacts
- Nextcloud
- ownCloud
- OpenCloud
- OneDrive
- Dropbox
- Seafile
Alternatives to Hylki
- 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
Also Ranked In
Hylki is ranked in 2 of our directories.
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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