Mozilla Thunderbird vs Spark Mail
On the evidence we track, Spark Mail leads this comparison with a composite score of 71/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.
Capabilities
Feature-by-feature on the axes that matter for email clients. “-” means undocumented, not absent.
What each one is
The product in its own terms, so the numbers below have context.
Mozilla Thunderbird
Thunderbird consolidates email, calendars, and contacts from multiple accounts into one interface. It runs on Windows, Mac, and Linux, is funded by user donations, and prioritizes privacy by never collecting personal data or serving advertisements.
Spark Mail
LeaderSpark is an email application designed for individual and team use, offering smart inbox management, AI-assisted email composition, and collaboration features. It supports multiple platforms and integrates with popular productivity and communication tools.
Pricing
List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.
Spark Mail
LeaderFree tier available. Plus $10/user/month, Pro $20/user/month (or annual billing). Enterprise custom pricing.
- FreeFree
- Unlimited email accounts
- Smart search
- Smart notifications
- Scheduled send
- Snooze
- +11 more
- Plus$10/user/month or $120/year
- All Free features
- Comprehensive mail productivity
- Spark +AI (AI assistant)
- Basic team collaboration
- Custom templates
- +2 more
- Pro$20/user/month or $240/year
- All Plus features
- Unlimited +AI meeting notes
- Workflows
- Automatic labels (coming soon)
- Read status
- +4 more
- EnterpriseContact sales
- All Pro features
- Security & control (SOC II compliance)
- Dedicated customer success management
- 1:1 productivity coaching
- Centralized billing
- +1 more
Platform & deployment
Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.
Integrations
What each product connects to. Counts come from the vendor's own integration directory where one exists.
Mozilla Thunderbird
Not documented yet.
Spark Mail
Leader- Asana
- MeisterTask
- TickTick
- Todoist
- Trello
- 2Do
- OmniFocus
- Reminders
- Things
- Evernote
- Instapaper
- OneNote
- Agenda
- Bear
- Notion
- Box
- Dropbox
- Google Drive
- OneDrive
- GoTo Meeting
- Zoom
- Google Calendar
- Outlook
- Microsoft Teams
- +7 more
Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.