Gmail is everywhere. It’s the most popular email client with over a billion users worldwide. Google is everywhere: we use G Suite, Google Docs, Chrome, and YouTube. Plus, Gmail comes with a whopping 15 GBs of free storage. The email service’s interface is simple and customizable to fit many needs. There’s plenty of reasons why people love it.

Despite all of the good vibes,  Gmail isn’t without its criticisms. Some users question how secure and private communication is on Gmail. Recent reworks to the platform have introduced a “confidential mode,” enabling expiration dates and copy-proof features for emails. Still, it’s always in the user’s best interest to consider alternatives.

1. Outlook – Microsoft

A lot of old-school business environments depend on Outlook. You’ve probably used Microsoft Outlook at some point if you’ve ever worked on a Windows operating system. The interface can seem jarring at first, but there’s a lot of power, plus a pretty deep customization option available to users. Plus, Outlook comes with 5GBs of free storage space.

Like Google, Microsoft has a massive app library that syncs with Outlook. Skype, OneDrive, OneNote, and Office are just a few. If you’re a major Office user, you’ll love features like the option of working directly on an Office file in Outlook.

2. Zoho Mail

Zoho stands out from its competitors as the business-oriented email service. With a background in Customer Relationship Management (CRM) tools, Zoho offers several collaboration options. The service also integrates with a library of extensions like Dropbox, Google Analytics, IBM Notes, and many more.

Zoho’s free service tier supports up to 25 users with 5GBs of storage each (You can buy more space if you need it.). A great feature of Zoho is the ability to use your domain name for a professional business email address. If you’re a small business, this is a great selling point.  Under the paid service tiers, ranging from $5 to $8 per month, users can get IMAP and POP access, ActiveSync, and multi-domain hosting and aliases.

3. ProtonMail

ProtonMail is answering the call for a secure, open-source email service that works across multiple operating systems. ProtonMail specializes in end-to-end email encryption. Emails remain decrypted, only unlockable with a password set by the users – claiming privacy from ISPs and governments. In addition to encryption security, ProtonMail doesn’t store IP address information.

The downsides of ProtonMail are its limitations set for its free service tier. Under the free tier, you can only send 150 messages, must work 500MB of storage, and there’s little-to-no customization. With the paid tiers, $4.95 to $7.70 per-month, you’ll see an increase in usability with 5GBs of storage and an allowance of 1,000 daily messages. Security-obsessed hackers rejoice!

There are a few other providers out there, but these seem to the best outside of Gmail. If you’ve got an email solution we forgot, leave us a comment on Facebook, or Tweet us. We’d love to hear your thoughts. And as always, if you’re looking for other content about productivity, check out the Umuse blog.