Comparison

Mailspring vs Mimestream

No leader: the top candidate Mailspring has only 0.29 confidence (low), below the 0.35 needed to declare a winner. The attribute-by-attribute breakdown below, with a source and date on every value, is the honest way to compare them.

Mailspring full profile →Mimestream full profile →

Machine formatsJSON Markdown GraphQLor send Accept: application/json

Mailspring66

Mimestream63

Attribute comparison across 2 tools
Attribute	Mailspring	Mimestream
Vioscale score	66 / 100low · 29%updating	63 / 100low · 26%updating
Pricing
Free tierpricing.free_tier	✓	✗
Modelpricing.model	commercial	commercial
Price levelpricing.price_level	low	low
Starting pricepricing.starting_price	$8	$4.99
Transparentpricing.transparent	✓	✓
Integrations
Countintegrations.count	7	3
Adoption
Github starsadoption.github_stars	17,762	-
Activity
Commits last 30dactivity.commits_last_30d	38	-
Release
Cadence daysrelease.cadence_days	15	-
Historyrelease.history	20 items	-
License
Spdxlicense.spdx	GPL-3.0	-
Language
Primarylanguage.primary	JavaScript	-
Market
Availabilitymarket.availability	Available worldwide	Available worldwide · Popular in US

Score

Vioscale score

Mailspring66 / 100low · 29%updating

Mimestream63 / 100low · 26%updating

Pricing

Free tier

Mailspring✓

Mimestream✗

Model

Mailspringcommercial

Mimestreamcommercial

Price level

Mailspringlow

Mimestreamlow

Starting price

Mailspring$8

Mimestream$4.99

Transparent

Mailspring✓

Mimestream✓

Integrations

Count

Mailspring7

Mimestream3

Adoption

Github stars

Mailspring17,762

Mimestream–

Activity

Commits last 30d

Mailspring38

Mimestream–

Release

Cadence days

Mailspring15

Mimestream–

History

Mailspring20 items

Mimestream–

License

Spdx

MailspringGPL-3.0

Mimestream–

Language

Primary

MailspringJavaScript

Mimestream–

Market

Availability

MailspringAvailable worldwide

MimestreamAvailable worldwide · Popular in US

Capabilities

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

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

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

Mimestream-

What each one is

The product in its own terms, so the numbers below have context.

Mailspring

A lightweight desktop application for Mac, Windows, and Linux that brings together multiple email accounts from different providers into one unified inbox. Core features run locally on your computer, with optional paid features for message tracking, scheduling, and productivity analytics.

Independently observed

Mimestream

A desktop email application designed for macOS that establishes direct connections to Gmail through its API, combining operating system capabilities with Gmail's functionality. It prioritizes privacy by storing all data and authentication tokens locally on your device rather than routing through intermediary services.

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

from $8/mofreemiumFree tier

Free tier available; Pro at $8/month

FreeFree
- Multi-account support
- Unified inbox
- Snooze
- Send later
- Mail rules
- +4 more
Pro$8/month
- Read receipts
- Link tracking
- Unlimited snooze and send later
- Mailbox analytics
- Contact and company profiles

as of 2026-08-21verify ↗

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 with family sharing
- Gmail label management with color coding
- Server-side filter management
- Quick calendar invitation responses
- Full Gmail search functionality
- Vacation responder configuration
- +5 more
TeamContact sales
- All Individual plan features
- Centralized billing administration
- Team seat management tools

as of 2026-08-20verify ↗

Platform & deployment

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

Platform and deployment support comparison
Supports	Mailspring	Mimestream
macOSPlatforms	✓	✓
WindowsPlatforms	✓	✗
LinuxPlatforms	✓	✗
Cloud / SaaSDeployment	-	✓

Platforms

macOS

Mailspring✓

Mimestream✓

Windows

Mailspring✓

Mimestream✗

Linux

Mailspring✓

Mimestream✗

Deployment

Cloud / SaaS

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

3 total

Gmail API
Google Calendar
Apple Calendar

Independently observed

Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.