Proton Mail 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.
Proton Mail
An email platform that uses end-to-end encryption to protect message contents from server access. Funded by subscribers rather than data exploitation, it provides privacy-focused communication for individuals and businesses with features like password-protected emails, alias generation, and team management tools.
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.
Proton Mail
- Essential-
- Unlimited logins, notes, and credit cards
- Browser, mobile, and desktop apps
- Secure vault, item and link sharing
- Built-in 2FA authenticator
- Dark Web Monitoring
- +2 more
- Plus-
- SSO and SCIM
- Access to Proton Sentinel
- File storage up to 100 MB
- SIEM integration
- Command line interface (CLI)
- +1 more
- Workspace Standard-
- 1 TB storage per user
- 15 custom email domains
- Secure personal and shared calendar
- Cloud storage and sharing
- User permissions and access management
- +1 more
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.
- Gmail
- Outlook
- Yahoo
Proton Mail
- Apple Mail
- Thunderbird
- Okta
- Microsoft Entra ID
- ADFS
- Edugain
- SimpleLogin
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
- Microsoft Teams
- AOL
- +4 more
Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.