Comparison

Mailspring vs Mimestream

No clear leader: Mailspring (58.5) and Mimestream (54.4) are within the 5-point margin; treat as a tie. The attribute-by-attribute breakdown below, with a source and date on every value, is the honest way to compare them.

Machine formatsMarkdownJSONGraphQLMarkdown is open. JSON and GraphQL need a free key.
Mailspring59
Mimestream54
Score
vioscaleAI score
Mailspring59 / 100medium · 65%
Mimestream54 / 100medium · 54%
Pricing
Free tier
Mailspring✓
Mimestream✗
Model
Mailspringfreemium
Mimestreamcommercial
Price level
Mailspringlow
Mimestreamlow
Starting price
Mailspring$8
Mimestream$4.99
Transparent
Mailspring✗
Mimestream✓
Integrations
Count
Mailspring7
Mimestream3
Adoption
Github stars
Mailspring17,885
Mimestream–
Activity
Commits last 30d
Mailspring100
Mimestream–
Release
Cadence days
Mailspring12
Mimestream–
History
Mailspring20 items
Mimestream–
License
Spdx
MailspringGPL-3.0
Mimestream–
Language
Primary
MailspringTypeScript
Mimestream–
Market
Content
Faq
Mailspring5 items
Mimestream6 items

Capabilities

Feature-by-feature on the axes that matter for email clients. “-” means undocumented, not absent.

Capabilities
Deployment model
MailspringLocal direct imap client
Mimestream-
Universal imap smtp exchange support
Mailspring✓
Mimestream-
Keyboard shortcut only navigation speed
Mailspring-
Mimestream-
Split inbox AI auto categorization
Mailspring-
Mimestream-
Read receipts and open tracking
Mailspring✓
Mimestream-
Snooze and scheduled send later
Mailspring✓
Mimestream-
Generative AI LLM email drafting
Mailspring-
Mimestream-
Conversational chat layout view
Mailspring-
Mimestream-
Unified multi account inbox view
Mailspring✓
Mimestream✓
Pgp end to end encryption support
Mailspring-
Mimestream-
SOC2 type ii
Mailspring-
Mimestream-
ISO 27001
Mailspring-
Mimestream-
Pricing model
MailspringFreemium
MimestreamPremium flat subscription

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.

Independently observed

Mimestream

A subscription-based email client for Mac that supports multiple Google accounts with family sharing and access across up to five devices. Requires an active subscription after the free trial period.

Independently observed

Pricing

List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.

Mailspring

HybridFree tier

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
as of verify ↗

Mimestream

from $4.99/moSubscription14-day trial

From $4.99/month or $49.99/year. 14-day free trial without credit card.

  • Individual$4.99/month or $49.99/year
    • All your Google accounts
    • Use on up to 5 devices
    • Share with immediate family
  • Group$4.99/seat/month or $49.99/seat/year
    • All your Google accounts
    • Use on up to 5 devices
    • Share with immediate family
    • Centralized billing
    • Easy seat management
as of verify ↗

Platform & deployment

Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.

Platforms
macOS
Mailspring✓
Mimestream✓
Windows
Mailspring✓
Mimestream✗
Linux
Mailspring✓
Mimestream✗
Deployment
Cloud / SaaS
Mailspring✗
Mimestream✓
Self-hosted
Mailspring✓
Mimestream✗

Integrations

What each product connects to. Counts come from the vendor's own integration directory where one exists.

Mailspring

8 total
  • Gmail
  • iCloud
  • Office 365
  • FastMail
  • Outlook.com
  • Yahoo!
  • IMAP
  • SMTP
Independently observed

Mimestream

4 total
  • Gmail API
  • Google Calendar
  • Apple Calendar
  • Google
Independently observed
Still deciding?

Mailspring or Mimestream: 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.