Thunderbird VS Spark Feature comparision
| Feature | Thunderbird | Spark |
|---|---|---|
| Built-in RSS reader | ||
| Extensible by Plugins/Extensions | ||
| Import from Google Reader | ||
| Integrated Chat | ||
| Integrated Web Browser | ||
| Multiple Account support | ||
| Support for OPML import of feeds | ||
| Tabbed interface | ||
| Export to PDF | ||
| Calendar integration | ||
| Clean design | ||
| Email scheduling | ||
| Exchange | ||
| Organize mails | ||
| Postpone email reception | ||
| Smart inbox | ||
| Snooze mail | ||
| Sync across Devices | ||
| Automatic Backup | ||
| Built-in themes | ||
| Built-in translation | ||
| Support for IMAP | ||
| Encryption | ||
| Ad-free | ||
| Configurable | ||
| Encrypted chat | ||
| Address book integration | ||
| Built-in Calendar | ||
| Unified inbox | ||
| Customizable | ||
| Email tracking | ||
| Undo send | ||
| Asana integration | ||
| Sync Contacts | ||
| Bundled with macOS | ||
| CalDAV | ||
| CardDAV | ||
| Encrypted Email | ||
| Gantt-charts | ||
| Kanban boards | ||
| Work Item Tracking | ||
| Agile boards | ||
| Box.com integration | ||
| Lightweight | ||
| Content Filtering |
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