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Best email client for Windows

In our comprehensive guide to the best email client for Windows, we take a close look at some of the most powerful programs available

person typing on Windows 11 laptop

Although the digital world is changing rapidly, email remains one of the primary communication methods for businesses across the planet. Email apps are available for virtually any operating system, and many programs also have versatile web interfaces. 

But selecting the best email provider for your business can be very difficult, especially if you don’t have experience or comprehensive knowledge in the field. Every single program comes with its own feature list and target audience, and in many cases, there are various subscription tiers and options available. 

It’s worth noting that many email clients are 100% free, forever. However, these also tend to be quite simple, lacking advanced features and the functionality of higher-end paid alternatives. Some clients focus on security, others prioritise ease of use, and still others aim to provide a rich feature list for a customisable experience. 

In our search for the best email client on Windows, we’ve tested countless programs, focusing on those with a downloadable app. In this guide, we analyse our top 10 choices, looking at security, prices, subscription levels, ease of use, and any other standout features that you might find useful. 

The best email client for Windows: Our top choices

1. Microsoft Outlook

Outlook's homepage

Integrated calendar, contacts, and other features

No free plan available

Excellent desktop and web apps

Resource-intensive at times

User-friendly Windows interface


Microsoft Outlook has been a leader in the world of email since its inception in the 1990s, and it continues to provide exceptional service to this day. Notable features include integrations with a powerful calendar, advanced search functionality, and a neat task manager to help you organise your life. 

Unfortunately, the Windows version of Outlook is only available with a paid Microsoft 365 subscription. Business plans start from £4.50 per user a month with an annual subscription, and there’s also a one-month free trial available. Along with Outlook, these provide access to various other Microsoft apps and services. Note, though, that you can access the Outlook web app for free at any time. 

One thing that stands out about Microsoft Outlook is its versatility. It’s extremely easy to customise the appearance of your inbox, and powerful mail filtering options are available. 

On top of this, Outlook comes with one of the most impressive feature lists we’ve seen. Recent additions include an AI-based sorting algorithm, automatic payment tools, and the MyAnalytics data analysis add-on. 

There are also apps available for Android and iOS mobile devices, enabling you to access and manage your emails on the go. 

Read our full Outlook review.

Free plan?
Web app?
Desktop app?

2. Mailbird

Mailbird's homepage

Impressive app integrations

Limited email filtering options

In-app web browser

Search options are quite poor

Highly-customisable user interface


If you’re looking for a high-quality, reliable email client that’s designed to work with third-party apps, Mailbird could be the right choice. Featuring integrations with various calendar, task, messaging, and other apps including WhatsApp, Google Docs, Slack, and Dropbox, this platform is designed to help you streamline everyday workflows. 

On top of this, Mailbird is designed to work with virtually any email account provider. It also supports unlimited accounts, which means you will be able to have all of your emails in one place. 

Unfortunately, there’s no free-forever version, although there is a limited free trial, so you can test the platform. Prices start from £2.58 a month for a Personal plan, or £3.92 a month for a Business subscription. Alternatively, sign up for a lifetime Personal license for a one-time fee of just £75. 

Free plan?
Web app?
Desktop app?

3. eM Client

eMClient's homepage

Excellent free-forever plan

Free version is limited to two accounts

Impressive suite of advanced features

Doesn’t always update automatically

Fast, straightforward setup


eM Client is a versatile Windows email client that’s designed to boost productivity through a suite of advanced features. There is a free version, which supports email, task-management, and calendar tools. However, this is constrained by the two-account connection limit and the inability to access many features. 

Upgrading to a Pro account unlocks unlimited email connections and an array of additional tools. One-time license fees start from £44.95 for a single user, with volume discounts available for those who need multiple licenses. 

With the Pro version, you can also migrate data from another email client with the click of a button, and all data will be automatically backed up at regular intervals. 

Additionally, eM Client features a suite of customisation tools so that you can personalise your inbox. Change the layout, colour scheme, and more to ensure you have a workspace that you’re comfortable with. 

Free plan?
Web app?
Desktop app?

4. Hiri

Hiri's homepage

Excellent productivity tools

Won’t work with all email accounts

Various subscription options available

No mobile apps available

Designed to help you save time


If you use a Microsoft email service, such as Hotmail or Outlook, Hiri could be the perfect option for your needs. It focuses on making ongoing email management fast and straightforward, with a suite of time-saving tools designed to put you back in control of your inbox. 

For example, the smart dashboard presents information about your account in one simple place. Discover how many unread messages you have, whether any of them need a priority reply, and whether there are any other actions you need to take. 

You will also benefit from the cleverly designed Compose window, which only includes the base options you will need to write a new message. With this, you won’t get bogged down by unnecessary formatting or editing tools. 

Lifetime licenses are available for just £94.97 per user, or you can pay annually for £31.13 a year. There is also a neat seven-day free trial available, so that you can test the platform before paying for full access.

Free plan?
Web app?
Desktop app?

5. Inky

Inky's homepage

Excellent anti-phishing technology

No native email client

Designed to secure your organisation

Lack of pricing information

Powerful machine-learning technology


Inky isn’t a Windows email client as such, but it’s gained a place on this list due to its excellent security features and industry-leading anti-phishing tools. Basically, this tool can be integrated with any other client you use, such as Outlook or Mailbird. 

When you receive a new email, Inky will analyse it to ensure it doesn’t contain potentially dangerous phishing links. It’s extremely powerful, with the ability to identify links that would look genuine to the majority of users. The software is based on a powerful machine learning algorithm, which means that it will continue to adapt to new threats over time.

If a suspicious email is detected, you will receive an immediate notification in the form of a banner across the top of the message in question. You will still be able to click the “suspicious” link if you want to, but we’d highly recommend not doing so. 

Unfortunately, pricing information isn’t available on the company website. However, a free demo is available, and prices are developed on a case-by-case basis.

Free plan?
Web app?N/A
Desktop app?N/A

6. Claws Mail

Claws Mail's homepage

Free, open-source mail client

Setup can be difficult for some providers

Numerous free plugins available

Can be a little confusing for beginners

Excellent mail filtering tools


Claws Mail is an advanced open-source email client designed for Linux users, but it also comes with a Windows port that enables it to be used with Windows devices. It’s an excellent option for those who are looking for a streamlined, responsive email client, although it can be a little difficult to set up and confusing for new users.  

One thing that stands out about Claws Mail is the fact that it’s 100% free, forever. As an open-source project, anyone can access the client and all of its features without paying a cent. 

On top of this, countless extra features can be added via the array of available plugins. For example, you could integrate an antivirus plugin for extra security, a calendar to manage your work, or even add a custom theme from the numerous designs available via the platform website. 

The main downside is that automatic setup isn’t available for some email accounts, but this shouldn’t be too much of a problem if you’re willing to spend a little time to familiarise yourself with the platform. 

Free plan?
Web app?
Desktop app?

7. Spike

Spike's homepage

Fully functional free plan

Storage and file upload limits

Excellent team-management tools

Few self-help resources

Very user-friendly platform


Spike combines the power of more traditional Windows email clients with the ease of use of social apps such as WhatsApp. Rather than using a traditional email layout, it turns emails into attractive chat conversations, streamlining workflows and making communication easier than ever. 

Basically, the platform is designed to remove any unimportant information from your email thread. Things such as repeated headers, threads, signatures, and other non-essential info are hidden, enabling you to focus on the important parts of your email messages. 

On top of this, there’s an attractive free plan that includes virtually everything you need for basic email communication. Business plans start at £6.39 a month per account, and Enterprise options are available for those who need a large number of accounts. 

All paid accounts come with unlimited message history and priority support - and you will have access to note, task, and calendar tools to streamline other aspects of your daily life. Note, though, that you will be constrained by file upload size and storage limits. 

Free plan?
Web app?
Desktop app?

8. Thunderbird

Thunderbird's homepage

Excellent customisation options available

Have to install extensions for some features

Plugins can be installed for extra security

Easy to misconfigure your account

100% free, forever


Thunderbird is a free Windows email client from Mozilla. With a great range of impressive features and inbox customisation tools, there’s a lot to like here. 

For one, Thunderbird stores a copy of your emails on your computer, which means that you can restore accidentally deleted or lost files. On top of this, it’s possible to connect various calendar apps, along with an RSS reader and various other extensions. 

Downloading and installing Thunderbird is very straightforward. You will have a fully functional email client from the beginning, but it’s also possible to personalise your inbox to ensure you have the appearance and tools you need. 

In addition, Thunderbird comes with a suite of security and privacy tools. Benefit from built-in features such as remote content blocking and do not track protocols, and rest assured that your private information is as secure as can be expected. 

Free plan?
Web app?
Desktop app?

9. TouchMail

TouchMail's homepage

Optimised for touchscreen devices

Only available for Windows

Very competitively priced

Account limits can be an issue

Attractive, intuitive user interface


If you use a Windows touchscreen device, TouchMail could be the perfect option. It has a very neat, block-based layout that’s designed for those using Windows tablets, but it works equally well on normal laptops or desktop computers as well. 

One of the best things about TouchMail is its highly customisable user interface. Personalise the appearance of your email client by changing colour schemes, resizing elements, and changing the way your emails are presented. 

On top of this, TouchMail lets you colour-code messages by sender or type of email. Delete large numbers of spammy or unwanted emails at the click of a button (or tap of a screen), and ensure you don’t miss important mail with customisable notifications. 

TouchMail is available for purchase through the Microsoft App Store. It’s priced at a competitive £19.99 for a one-time license. 

Free plan?
Web app?
Desktop app?

10. Postbox

Postbox's homepage

Streamlined integrations with numerous apps

No mobile apps available

Excellent 30-day free trial

Customer support could be better

Impressive range of advanced features


Postbox is an attractive, feature-rich email client available for both Windows and macOS users. It’s designed for those who are looking for a streamlined, time-saving client to help them optimise their daily workflows. In particular, Postbox is targeted at busy professionals across a range of industries, with features to help users organise and stay on top of their mail. 

The sheer number of advanced features available here is truly impressive. For example, Postbox supports integrations with a suite of third-party apps, including Slack, MailChimp, Evernote, Dropbox, and more.

There are also numerous security tools to help you protect your email, including tracking prevention, end-to-end OpenPGP encryption, and Google Safe Browsing to reduce the risk of phishing. In turn, Postbox is compatible with any POP or IMAP email account, including Gmail, Outlook, Yahoo, and numerous others. 

A 30-day obligation-free trial is available for those who want to test the program before committing to a purchase. Lifetime licenses start from £63 per user, with volume discounts available for those who need numerous licenses. 

Free plan?
Web app?
Desktop app?
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