Mailspring vs Superhuman
On the evidence we track, Superhuman leads this comparison with a composite score of 70/100. 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.
Mailspring
Mailspring is a desktop email client built as open source that runs your sync engine locally without sending credentials to remote servers. It includes core features like unified inbox, snooze, scheduled sending, and mail rules, with optional premium capabilities available through a paid subscription.
Superhuman
LeaderA productivity suite combining a fast email client, collaborative documents with built-in AI, and a proactive AI agent that integrates across web apps and tools you already use.
Pricing
List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.
Mailspring
Free open source core + monthly paid Pro tier
- FreeFree
- Unified Inbox
- Snooze
- Send Later
- Mail Rules
- Templates
- Mailspring Pro-
- Link tracking
- Read receipts
- Mailbox analytics
- Contact profiles
- Company profiles
Superhuman
LeaderFrom £10/member/month. Free tier available.
- FreeFree
- Chat with AI in all applications and tabs
- Writing assistance in 20+ languages
- Tone and voice adaptation
- Collaborative docs with tables, charts, Kanban boards, forms
- Doc automation with formulas
- Pro£10/member/month (annual) or £12/member/month (monthly)
- Unlimited paragraph rewrites and translations (15+ languages)
- AI-generated text detection and plagiarism checking
- Brand voice consistency enforcement
- Business£28–£33/member/month (exact amount depends on billing frequency)
- AI-powered inbox organization and smart replies
- Personalized email drafts
- CRM integrations (HubSpot, Salesforce, Pipedrive read-only)
- Unlimited doc automations and version history
- Data sync from Jira, GitHub, Figma into docs
- EnterpriseContact sales
- Team analytics and reporting
- Advanced security and admin controls
- SAML single sign-on
- Custom roles and permissions
- Data loss prevention
- +2 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
Mailspring
- iCloud
- Office 365
- FastMail
- Outlook.com
- Yahoo!
- IMAP
- SMTP
Superhuman
Leader- Asana
- Ashby
- ClickUp
- Commerce Layer
- DeepL
- Demio
- Figma
- GitHub
- Gong
- Google Analytics
- Google Calendar
- Google Meet
- Google Translate
- Google Workspace Directory
- HeyGen
- HubSpot
- Jira
- Mermaid
- Miro
- Microsoft Outlook
- Microsoft Teams
- Outreach
- Pipedrive
- Salesforce
- +32 more
Mailspring or Superhuman: which one depends on you
A composite score cannot know your constraints. Describe them and both get re-weighted against what you actually need, with the evidence behind every position.
Free to run, no account needed to start. How the evaluation works
Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.