5 best Outlook email clients: Which are actually worth switching to?
Not sure which is the best Outlook email client? We compare the top options, and why the answer might already be in your inbox.
John Reid
The best Outlook email client isn't always a different app. According to Fyxer's Admin Burden Index, a survey of 5,000 UK and US office workers, email is the number one time-waster at work, with employees losing 5.6 hours a week to admin that AI could handle. If Outlook is where you spend your working life, the more useful question isn't which client to switch to. It's how to make the one you're already in work harder for you.
We'll examine the costs and implications of switching to an Outlook alternative, and whether you just need a smarter way to work with the tool that you've got.
The case for staying with Outlook
There are two types of email client: one that's a separate interface to your mainstay email provider, or a layer that plugs into the tool that you've got. Fyxer is part of the second camp, enhancing Outlook rather than replacing it.
It's tempting to abandon Outlook for a zippy email client that promises big productivity gains. Before you do, it's worth running the numbers on what switching actually costs.
The hidden cost of switching
Adopting a new email client means relearning habits and restructuring processes. Trial periods can help assess its value, but the real danger is migrating to a tool, slowly discovering it's unsuitable, and working at a subpar level until your subscription ends.
Particular Outlook challenges like drafting replies or identifying urgent messages can cause significant friction. A targeted solution that layers over Outlook, rather than replacing it, is likelier to be a benefit.
Can your systems cope with change?
If a new tool in your tech stack doesn't gel with the rest of the system, it becomes another distraction or bottleneck to getting stuff done. Many email clients overlook the fact that your inbox inevitably functions as its own self-contained task management system, trying to solve for this with flashy but unnecessary features. The most effective client recognizes that Outlook is the system and optimizes there.
Understanding what matters
Most Outlook alternatives emphasize filters, folders, and custom layouts. What marks out a genuinely helpful email tool from window dressing is taking the admin burden away from its user. While Outlook treats every email equally by default, a sophisticated client that can surface what matters based on urgency and relevance solves what Outlook and other standalone email clients cannot.
Finding your voice
There are plenty of smart drafting features in email clients, but few generate sophisticated responses that a user doesn't end up redoing. If you spend more time rewriting than writing, your tool has failed you. A thoughtful email assistant like Fyxer gathers enough information about your communication style to produce messages that sound authentically yours.
What is the best Outlook email client for your workflow?
Most people searching for a better Outlook email client are really searching for a way out of inbox overwhelm. The daily grind of working through a backlog, figuring out what actually needs a reply, and writing the same kinds of emails over and over adds up to a significant chunk of the working day. The tools below represent the main ways people try to solve that problem: some replace Outlook entirely, others sit on top of it. Which approach is right for you depends less on features and more on how much disruption you're willing to absorb to get there.
1. Mailbird
Mailbird is a Windows-first experience helping users manage multiple email accounts and bring productivity features into one place. Mailbird reduces time and attention lost from switching tabs by keeping your calendar, emails and other integrations in one area. It also works with Yahoo Mail, iCloud Mail, Exchange and IMAP/SMTP supported email accounts.
Built specifically for Windows, Mailbird consolidates multiple email accounts and productivity tools into one interface, no need to jump between tabs. Sales and outreach professional can use Mailbird's read receipts and tracking capabilities to see if their campaigns are effective. Teams can collaborate closely with Mailbird's Slack and Asana integrations.
Mailbird has privacy and security-centric features, such as its "Leave me alone" range of tools that mass-unsubscribes, blocks suspicious messages, consolidates newsletters and email address shielding for online registrations.
Mailbird also supports Yahoo Mail, iCloud Mail, Exchange and any email service using IMAP/SMTP protocols.
The free version has strict limits, but the premium tier gives you all the functionalities. A one-time $399 fee grants you permanent access.
Tier
Price
Features
Free
Free
Account, knowledge base support
Premium
$5.75/user/month
Enhanced support, unlimited email tracking, ChatGPT integrations, Leave me Alone features
2. The Bat!
Exclusively for Windows, The Bat! prioritizes security and data protection. It features robust encryption, advanced message templating, filing and a handy "mail ticker" that shows email summaries on-screen. As a privacy-focused tool, it blocks spy pixels and stops spammers from tracking when you download images to confirm message opens.
For commercial users, The Bat! offers a Professional edition. The company also produces Voyager, an email client that works on removable storage devices, no computer installation required. You plug a hard drive or USB stick with Voyager into any computer to access your emails, meaning you literally carry your emails around with you.
Tier
Price
Features
Home
$49.99 one-off
Encryption, Document viewer, Address Book, Calendar, Templates, RSS reader, and more.
Professional
$59.99 one-off
Home, plus Voyager, base messaging encryption, biometric hardware authentication
Upgrades
$24.99-$34.99
For users on old versions of The Bat!
3. Superhuman
Superhuman claims "keyboard-first" efficiency for professionals sifting through hundreds of emails at their desk. Its shortcuts speed up writing, filing and filtering emails. Users can organize messages with custom categories and track recipient engagement with emails (great for sales and outreach roles). AI capabilities include summarizing messages and drafting emails in your voice.
Superhuman owns the writing assistant Grammarly, the collaboration tool Coda and the all-purpose AI called Go, which you can use at varying degrees across all subscription tiers. Its actual Mail tool is $40 per month.
Tier
Price
Features
Free
Free
Grammarly, Go, Coda
Pro
$30/month
Grammarly, Go and Coda upgrades
Business
$40/month
Grammarly, Go and Coda upgrades; Mail
Enterprise
Custom
Custom
4. Spark Mail
Spark Mail is powerful at high-volume email management. It gives users a distraction-free environment to get through emails, meaning no integrations interrupting your focus. Spark Mail groups similar messages together to make bulk deletion, archiving or deferral easy. Users can also pause incoming messages and customize keyboard shortcuts to help optimize their inbox.
You get a lot of features in the free version. AI-driven time-savers require a paid subscription, which is suited to large teams. Like Fyxer, Spark Mail offers a 7-day trial period.
Tier
Price
Features
Free
Free
Basic features (snooze, unlimited accounts)
Plus
$10/month
AI assistant, Team collaboration, capped meeting notes, custom templates
Looking for a desktop-only email client? eM stands out for its comprehensive features, like email, calendar, contact management, task tracking, note-taking, RSS feeds and offline syncing. It essentially replicates Outlook's capabilities without needing a Microsoft 365 licence. The downside is there's no web-based option.
The free tier gives only limited access to its features. There's a one-time fee ($59.95 standard or $149.95 with lifetime updates) that is better long-term value over subscription fees.
Tier
Price
Features
Free
Free
One licence
Basic email, calendar, contacts, chat, AI as add-on
Personal
$39.95/year
Single user on 3 devices
Full feature set
Business
$49.95/year
1 device
Varying discounts
Full feature set
Work the email provider you've got
For anyone managing a high-volume inbox (account managers, sales reps, team leads) the daily drain isn't Outlook itself. According to Fyxer's 2026 Admin Burden Index, professionals report spending over an hour a day on email admin that could be handled by AI. Fyxer layers directly over Outlook to handle that load: drafting replies in your voice, categorizing what needs your attention, and clearing the noise without asking you to learn a new interface. You stay in the inbox you know. Fyxer handles the rest.
Outlook email client FAQs
Is Microsoft Outlook an email client?
Yes, Microsoft Outlook is an email client that offers desktop, tablet and phone apps. Outlook and other add-ons like Calendar or Sharepoint can be integrated.
Is Outlook email being discontinued?
No. Microsoft Outlook is not being discontinued. Microsoft has been investing heavily in Outlook, including a rebuilt "New Outlook" experience for Windows and Mac that replaced the legacy desktop client and is now the default for Microsoft 365 users. The classic Outlook app is being phased out in favor of the new version, which is what some users may have encountered, but the Outlook product itself remains central to Microsoft's roadmap and is not going anywhere.
Why use email clients?
You can use an email client to substitute or enhance your existing email provider. Generally, many email clients offer features designed to give users more confidence in managing their inboxes, such as the following:
Managing several email accounts on an interface
Downloading and storing emails to work offline
Backing up emails
Customizable interface display, email layouts and pre-written templates.
Shortcuts, filters and scheduled drafts
AI that can help you draft email replies or identify priorities.
Are email clients safe?
Yes, so long as a user chooses a client with high security credentials and updates any apps used regularly. Fyxer is SOC 2, ISO and GDPR compliant and never shares your data with third-party AIs for training.
