Spark

Spark

Updated Jun 9, 2026
Awarded
2efficiency points
by editors.

Purposeful Design, Speed & Productivity, AI Assistance, Follow-Up, and Team Collaboration

Spark
Spark screenshot
FTC
Review
Comparison8

Review Summary

Review Summary

Use Spark Mail if you want a free, faster, and more organized email client than Gmail, Outlook, or Apple Mail, especially as an individual or student looking to improve your inbox with minimal effort.

Skip Spark Mail if you're a busy professional looking to get through your inbox faster and just want the best option out there (it's Superhuman Mail).

Best Email Client: $0 vs $400 Email

Best Email Client: $0 vs $400 Email

Spark Alternatives

Spark Alternatives

Not sure if Spark is the right fit for you? Check out these alternatives:

  1. Superhuman Mail
    Superhuman Mail

    Best overall email client

    Best overall email client

What is Spark Mail?

What is Spark Mail?

Spark Mail is an email client that is designed to help you get through your inbox faster. Spark is miles better than Gmail, Outlook, or Apple Mail, both on desktop and on your phone and we can't think of a reason why someone wouldn't use Spark—they even have a generous free tier.

While we can't say Spark wins the category for the best email client (our top pick is Superhuman Mail as they put slightly more TLC into their features and design), Spark is certainly the best email application that offers a free version.

Who is Spark For?

Who is Spark For?

Spark is a great app if you're new to using email productivity software and want to try something that is relatively low-commitment.

Individuals

Individuals

If you're wanting a faster, more organized way to triage through emails than Gmail, Outlook, or Apple Mail, with a more minimal interface and fewer distractions, then Spark is definitely worth checking out.

Spark works on both Mac and Windows and works with Gmail, Outlook, Exchange, iCloud, and IMAP.

Spark email inbox listview

Notifications and Newsletters are automatically grouped together in Spark Mail.

Junk Mail Overload

Junk Mail Overload

If your inbox is exploding and you've gotten to the point of considering creating a new email address because of too many newsletters and notifications, then Spark can help clean things up relatively easily. Spark Mail's smart inbox feature will group emails into newsletters, notifications, and emails from real people, making your email more manageable out of the gate.

Teams

Teams

We love that you can collaborate on emails with team members within Spark email. Simply share emails with team members and tag each other in the comments if collaboration is needed. The ability to assign deadlines and team members to specific emails helps eliminate that "who is answering this?" feeling.

You can also have shared inboxes to manage your info@, support@, or contact@ email addresses. Although, beware — this feature is currently only available for Gmail email clients, Mac, iOS, and Android. The desktop version is coming soon!

If team collaboration is your main pain point, or you're a founder looking to delegate your inbox, also check out Missive as it might be a better fit for you.

Key Features

Key Features

User Experience

User Experience

Spark Mail is super easy to use. If you're looking for an email client that has little to no learning curve, Spark is it. We love that Spark didn't overdo it with features (like many apps do, trying to do too much at once).

Spark is faster than other basic free tools in everyday use. Keyboard shortcuts exist, templates are easier to access, and general navigation feels smoother.

That said, it’s not fully optimized for a deep, keyboard-first workflow. You’ll still rely on your mouse more than you might expect. For many, Spark feels like a productivity improvement, but it's just not the most optimized experience available.

Unified Inbox

Unified Inbox

Spark mail allows you to have a unified inbox (aka one inbox for multiple email accounts), so you don't need to have multiple tabs open for your emails anymore. If you have several personal and work email addresses, for example, you can easily add them all to Spark so they show up under one inbox.

But say you prefer to not mix your work emails in with your personal, you can simply toggle off your work email so that it's not a part of the unified inbox, but you can still easily jump into that inbox within the left-hand bar (without opening another tab or app).

AI Features

AI Features

On the paid tier of Spark, you get Spark + AI. With Spark + AI, you can ask the AI to generate a reply, change the tone of the email, or shorten or lengthen the response. You can also give Spark 3 emails that "sound like you" so that it learns your tone (this is not as good at Gmail's Gemini AI email assistant though, which uses your entire inbox to learn your tone).

Spark Compose Window

Spark Email AI Response With Prompt

You can also use Spark's AI to summarize a thread.

Spark's AI summarize email options

Spark Email AI Summary Type

Embedded Image

Summarize Emails Using Spark Email AI

Smart Inbox

Smart Inbox

Spark mail will group together your notifications, newsletters, and 1:1 emails from people, allowing important emails to stand out. A miss here is that there doesn't seem to be a way to customize these groupings to your desire, and some claim that Spark makes mistakes with these classifications, although they are easy to fix with a few clicks.

Spark Mobile App

Spark Mobile App

Spark's mobile app is everything you'd expect from a fast email app. If you're a heavy swipe gesture user, then you will love the mobile app as you can customize your top used actions (e.g. archive, delete, snooze, mark unread).

Some folks said they exclusively check their emails via the Spark mobile app!

Team Collaboration

Team Collaboration

Spark is an email client that allows for team collaboration. You can @mention team members under a thread, assign emails to others, and even have someone on your team respond on your behalf. For small teams, this is incredibly helpful in streamlining email response workflows.

Additional Features

Additional Features

User Interface

User Interface

While Spark's interface is miles better than Gmail or Outlook, it still feels—well—like email. For instance, Superhuman gives your entire email app a facelift with its beautiful minimal design, consistent colors, fonts, and automatic resizing of emails to make them readable no matter your screen size. While Spark tries to do a bit of this, it's clear that less TLC went into the interface. For instance, in Spark, emails stretch with your screen, making them more difficult to read.

Spark email interface

Emails don't re-size, making them more difficult to read.

Integrations & API

Integrations & API

Spark's integrations are focused around note-taking and to-do list apps that are more consumer-focused than B2B apps. For instance, you can integrate Spark with Evernote, Bear, TickTick, Todoist, or Apple reminders — but these are not apps commonly used by professionals for work. The only B2B-focused integration seems to be Asana at the moment.

Pricing

Pricing
  • Free: Best for individuals & students wanting a better email experience.
  • Plus: $10/mo per user ($99/yr). Best for professionals who want to unlock the Spark + AI feature.
  • Pro: $20/mo per user ($199/yr). Best for teams who want to start collaborating on email.
  • Enterprise: Unlisted. Includes extra security and controls for large teams.

Final Verdict

Final Verdict

Is Spark mail worth it? Even though Spark mail isn't our top pick for professionals who heavily rely on their email (we prefer Superhuman due to their more refined features and design), Spark is the best free alternative available.

It provides a significant improvement over traditional email clients like Gmail, Outlook, or Apple Mail, so if you're not willing to pay for Superhuman Mail, we definitely recommend at the very least using Spark. You can also compare Superhuman Mail vs Spark.

Screenshots

Screenshots
Spark Mail InterfaceSpark email inbox listviewSpark's AI summarize email options
Spark

Spark

Spark Mail Interface

Categories

Categories

Spark fits into multiple categories based on what it actually helps you do. Each category highlights a different strength and the efficiency points it earned, helping you compare tools not just by features, but by how well they actually perform.

EmailMain

Keep exploring the best software across categories, or explore Spark alternatives

FAQ

FAQ

Who Shouldn't Use Spark?

Who Shouldn't Use Spark?

If you are a VC, investor, or professional who deals with a ton of email and a lot of intros, we'd recommend considering Superhuman Mail instead. Superhuman offers a premier email experience that is the best in class (and is what we've used here at Efficient App for over 6 years).

Superhuman has gone that extra mile with each feature, and for professionals who live in their inbox, we say the extra TLC is worth the extra cost. Read our full Superhuman Mail Review.

What Are Some Spark Mail Limitations?

What Are Some Spark Mail Limitations?