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Outlook for Windows vs Spark

Published On January 14, 2025 - Last Modified On April 6, 2026

Outlook for Windows vs Spark Comparison Image

Meet the contenders

Whether you're a freelancer, small business owner, or corporate executive, there's an email app for you. We're here to help you decide.

Let's look at how these two email apps stack up against each other.

Outlook for Windows Logo

Outlook for Windows

Outlook for Windows is a new email client and personal information manager that replaces the defunct Windows Mail and Calendar apps (which are no longer supported by Microsoft). This default email client app is included in most newer Windows 11 PCs shipped in 2024 and features tight integration with Microsoft 365 apps, AI tools, and a fresh design.

Spark Logo

Spark

Spark is an email client that transforms how you interact with your inbox, helping you eliminate email clutter, minimize distractions, and stay organized. With its Smart Inbox and Gatekeeper features, Spark aims to ease email management and prevent unwanted senders from taking over your inbox. Its Premium version offers advanced tools, such as AI-powered assistance and team collaboration.

Outlook for Windows vs Spark: A side-by-side comparison

Outlook for Windows LogoOutlook for Windows
Spark LogoSpark

Operating system

Windows

Windows macOS iOS Android

Versions

Outlook Free

Microsoft 365 Basic

Microsoft 365 Personal

Microsoft 365 Family

Free

Premium Individual

Premium Teams

Price(s)

  • Outlook Free

  • Microsoft 365 Basic: $19.99/year

  • Microsoft 365 Personal: $99.99/year

  • Microsoft 365 Family: $129.99/year

  • Free

  • Premium Individual: $4.99/month (billed annually)

  • Premium Teams: $6.99/month (billed annually)

Notable features

  • Multi-account support

  • Simplified interface, with modern design

  • Integration with Microsoft 365 tools

  • Natural-language search capabilities

  • AI-assisted email authoring with Microsoft Copilot

  • Third-party app integrations

  • Customizable user interface

  • Collaboration tools

  • Offline support

  • Built-in translation for email messages in over 70 languages

  • Multi-account support

  • Unified inbox

  • Smart Inbox (categorizes/prioritizes messages)

  • Gatekeeper (screens and blocks emails)

  • AI-powered email assistant

  • Third-party app integrations

  • Natural-language searching

  • Bundle emails from preferred senders

  • Message pinning

  • Thread muting

  • Team collaboration tools