Gmail AlternativesOnly apps categorised as Calendar Apps

The best Calendar alternative to Gmail is Proton Mail, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 100 alternatives to Gmail and 15 are Calendar Apps so hopefully you can find a suitable replacement. Other interesting Calendar App alternatives to Gmail are Tuta Mail, Posteo, mailbox and Vivaldi Mail.

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Gmail alternatives are mainly Calendar Apps, but if you're looking for WebMail Providers or Email Clients you can filter on that. Other popular filters include Open Source, Free, Android + Free, Android, Android + Open Source, Self-Hosted and EU. You can also filter by region, for example EU-based alternatives if you prefer software developed in the European Union. These are just examples - use the filter bar below to find more specific alternatives to Gmail.

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Get a badge for your siteGmail alternatives page was last updated Sep 20, 2026

Mailfence
Sponsored
This secure email platform offers end-to-end encryption, a comprehensive suite with Calendar and Documents. Mailfence is inter-operable with OpenPGP services, features digital signatures, provides keystores, and available as a PWA for mobile independence while ensuring no ads, trackers, or surveillance.
78 Mailfence alternatives
Cost / License
Freemium
Proprietary
Application typeApplication types
WebMail Provider
Email Client
Origin
Belgium
EU
Platforms
Online
Android
iPhone
Android Tablet
iPad
Belgium
EU
+9
Proton Mail
1136 likes
Proton Mail provides secure email services with end-to-end encryption, ensuring data protection. Swiss-based and outside US jurisdiction, it offers a free version to champion privacy as a human right. Fully accessible on any device.
111 Proton Mail alternatives
Cost / License
Freemium
Open Source (GPL-3.0)
Application typeApplication types
WebMail Provider
Email Client
Origin
Switzerland
Platforms
Mac
Windows
Linux
Online
Android
iPhone
iPad
Snapcraft
Flathub
Tor
OpenAPK
Switzerland
+9
Good alternative?Is Proton Mail a good alternative to Gmail?

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35comments
Proton Mail vs Gmail Comments
Top Positive Comment by John Fastman · Dec 20, 2016
Protonmail is free, open-source, encrypted (more private). Lacks: calendar & good contacts feature, but these are in the pipeline. Protonmail cannot by design data-mine your software for it's own profit; Gmail makes it's money by violating your privacy that way.
Positive comment by Raposu · Sep 4, 2026
Better than Gmail but i prefer tuta because they are more focused in FOSS alternatives, where as proton have some propietary services and didn't care as much of other stuff (as windows usage) But great improvement over gmail, for sure!
Positive comment by Shaz Shah · May 21, 2025
Proton Mail is my primary email and I have been moving away from GMail. In fact I do pay for it.

Proton Mail has been reliable and their support has been great. The UI is different and pleasant, and they have apps that cater for different platforms (Windows, macOS, Android, etc).
3 of 35 comments
Proton Mail is Freemium and Open SourceGmail is Free and Proprietary
Proton Mail is Privacy focusedGmail is not according to our users
Tuta Mail
581 likes
Offers comprehensive encryption for email, calendar, and contacts with zero personal info required. Built on open source, install via Play Store, F-Droid, or APK, with Tor and VPN support. Both free and paid plans; utilizes quantum-resistant encryption ensuring privacy-focused, anonymous usage.
112 Tuta Mail alternatives
Cost / License
Freemium
Open Source (GPL-3.0)
Application typeApplication types
WebMail Provider
Email Client
Origin
Germany
EU
Platforms
Mac
Windows
Linux
Online
Android
iPhone
Android Tablet
iPad
Flathub
F-Droid
Thunderbird
OpenAPK
Germany
EU
+1
Good alternative?Is Tuta Mail a good alternative to Gmail?

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14comments
Tuta Mail vs Gmail Comments
Top Positive Comment by justinterested · Jan 6, 2019
Tutanota is a great email provider with very good encryption (it uses end-to-end encryption like Signal – i.e. they cannot read your emails/gife them to the government, Gmail can!) and they don't sell any data. It is also very easy to use, it has a very nice app, a desktop client and a web client. There is really no reason why you wouldn't want to use it :)
Top Negative Comment by Guest · Jul 14, 2019
Does not support POP/IMAP, you will not be able to use it with Thunderbird or another email client.
Positive comment by Raposu · Sep 4, 2026
Works great and it will be a great substitute for someone looking to fully degoogle (They even use their own push service rather than Playstore's and they always support FOSS stuff as Linux, GrapheneOS and others...) If you just want your own mail and calendar this is perfect, E2EE. without AI and with their own apps :D
3 of 14 comments
Tuta Mail is Freemium and Open SourceGmail is Free and Proprietary
Tuta Mail is Privacy focused and LightweightGmail is not according to our users
Posteo
92 likes
Web- and IMAP-based email service. 4GB cost 1€/month. Information is hosted on encrypted hard drives. Electricity from renewable resources is used.
85 Posteo alternatives
Cost / License
Paid
Open Source
Application typeApplication types
WebMail Provider
Email Client
Origin
Germany
EU
Platforms
Online
Germany
EU
+9
Good alternative?Is Posteo a good alternative to Gmail?

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7comments
Posteo vs Gmail Comments
Top Positive Comment by Raposu · Sep 10, 2026
Works well but it isn't for beginners (normies). Use this if you are tech-savy
Top Negative Comment by Guest · Sep 12, 2024
Lack of labels - only folders. Poor and broken search function on web client (seems to scramble email details in results?) Unable to send through external addresses. Does not group multiple separate emails from same sender. No multiple star colours
Positive comment by venture2935 · Aug 26, 2026
Not as robust as Gmail but good enough if all you need is basic stuff.

Cheap and focused on renewables
3 of 7 comments
Posteo is Paid and Open SourceGmail is Free and Proprietary
Posteo is Privacy focused and Security-focusedGmail is not according to our users
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Proton Mail
Proton Mail provides secure email services with end-to-end encryption, ensuring data protection. Swiss-based and outside US jurisdiction, it offers a free version to champion privacy as a human right. Fully accessible on any devi...

https://proton.me
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mailbox
77 likes
E-mail inbox, online office, cloud storage, and video conferencing. Business or personal plans. From 1 € /month (1.10 USD).
90 mailbox alternatives
Cost / License
Paid
Proprietary (AGPL-3.0)
Application typeApplication types
WebMail Provider
Email Client
Origin
Germany
EU
Platforms
Online
Germany
EU
+3
Good alternative?Is mailbox a good alternative to Gmail?

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4comments
mailbox vs Gmail Comments
Positive comment by John Fastman · Dec 20, 2016
At the moment, Mailbox.org is probably the best Gmail alternative: 1) You pay for the service with money, not your privacy (no data mining), 2) Excellent integration of encryption, 3) excellent Calendar and Contacts (not on mobile yet), 4) Yubikey 2FA, 5) Data stored in Germany (better privacy laws).
Positive comment by madmonk · Jan 18, 2019
Best Gmail replacement at the moment. You get all the suite functions like the calendar, address book, cloud space, apps for a fair cheap price and the priceless privacy policy and encryption without losing IMAP capabilities as with some even more privacy focused email providers like Protonmail and Tutanota.
Positive comment by freebikerider · Apr 8, 2023
Mailbox.org is an extremely stable and privacy-oriented email service provider, based in German. A Standard account is only €3 per month, giving you 25 @mailbox.org and 50 @custom domains aliases, 10 GB mail storage, 5 GB cloud storage, secure video conferencing, calendar, and many other features.
3 of 4 comments
mailbox is Paid and ProprietaryGmail is Free and Proprietary
mailbox is Privacy focused and Security-focusedGmail is not according to our users
Vivaldi Mail
36 likes
Vivaldi Mail is a free email service with no ads and no strings attached developed by Vivaldi Technologies. It also offers contacts and calendar features, search capabilities, folders management, WEB/POP/IMAP access, 10GB of storage capacity, 20 MB of maximum attachment size...
108 Vivaldi Mail alternatives
Cost / License
Free
Proprietary
Application typeApplication types
WebMail Provider
Email Client
Origin
Norway
Platforms
Online
Vivaldi
Norway
+2
Good alternative?Is Vivaldi Mail a good alternative to Gmail?

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1comment
Vivaldi Mail vs Gmail Comments
Positive comment by architsastam · May 4, 2021
Vivaldi Mail is the best alternative to Gmail and Vivaldi itself offers other excellent products like Vivaldi Browser which is far better than Google Chrome. All their products are privacy-focused and they value people's opinions.
1 of 1 comments
Vivaldi Mail is Free and ProprietaryGmail is also Free and Proprietary
Fastmail
82 likes
Fastmail offers secure email hosting with comprehensive webmail services, including IMAP, POP, and SMTP protocols. It supports file sharing, shared folders, large mailboxes, instant messaging, and is compatible with popular email programs. Excellent for businesses with compliance features.
85 Fastmail alternatives
Cost / License
Paid
Proprietary
Application typeApplication types
WebMail Provider
Mail Server
Origin
Australia
Platforms
Mac
Windows
Linux
Online
Android
iPhone
Android Tablet
iPad
Flathub
Flatpak
Australia
+6
Good alternative?Is Fastmail a good alternative to Gmail?

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3comments
Fastmail vs Gmail Comments
Positive comment by John Fastman · Dec 20, 2016
Fastmail is an Australian email company that is a complete Gmail killer: 1) You pay with money, not your privacy (they don't data-mine or sell your data); 2) Full replacement for email, calendar, contact - including mobile app. 3) 2 factor authentication (Yubikey & others), infinite catch-all email addresses, file storage. Brilliant Gmail replacement.
Comment by bulldogs · Sep 20, 2026
The difference that matters here is not privacy or price, it is what a program can do with the mailbox.

Gmail automates from inside the runtime. Apps Script exposes GmailApp, which searches threads with the same query syntax you type into the search box, reads bodies and attachments, applies labels, and writes into a Sheet on a time-driven trigger. Nothing to host, and no credentials to provision beyond authorizing the script once. The cost is that this surface exists nowhere outside Google.

Fastmail automates over the wire. It is the reference implementation of JMAP, a documented JSON-over-HTTP mail protocol with scoped API tokens, and it still speaks IMAP and SMTP. Anything that can make an HTTP request can drive the mailbox from any host, but you supply the host and the scheduler.

Pick by where the rest of your automation already lives. If mail is one step in a chain that already touches Sheets, Drive or Calendar, Gmail wins because the chain never leaves the runtime. If the automation is your own code on your own box, JMAP is the more portable surface, and the one you could repoint at another provider later.
Positive comment by Guest · Mar 30, 2018
FastMail is the most professional mail service out there, the only problem with FastMail over Gmail is that they do not have good html template support yet, besides that, Gmail does not stand a chance.
3 of 3 comments
Fastmail is Paid and ProprietaryGmail is Free and Proprietary
Fastmail is Privacy focusedGmail is not according to our users
Infomaniak kMail
51 likes
Privacy-focused Swiss email system provides 20 GB free storage, supports custom domains and unlimited storage, syncs contacts and calendars, is ad-free, and is part of a secure productivity suite used by over a million users across Europe on all devices.
Cost / License
Freemium
Open Source (GPL-3.0)
Application typeApplication types
WebMail Provider
Email Client
Origin
Switzerland
Platforms
Online
Android
iPhone
Android Tablet
iPad
F-Droid
Switzerland
+8
Good alternative?Is Infomaniak kMail a good alternative to Gmail?

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3comments
Infomaniak kMail vs Gmail Comments
Positive comment by Guest · Oct 10, 2017
You have all the functions you need in workspace, like Gmail. Fully customizable, high security. This product is professional. I use it since 2 year, and I don't want to return to Gmail. Only one point : you need a domain name. But it's more original like a Gmail.com address...
Positive comment by hb9vaf · Sep 24, 2025
I very good alternative for mail, contact & agenda
Positive comment by ImSebi · Feb 16, 2022
Much better than Gmail. And now you don't need a domain anymore, it's free for everyone.
3 of 3 comments
Infomaniak kMail is Freemium and Open SourceGmail is Free and Proprietary
Infomaniak kMail is Privacy focusedGmail is not according to our users
GMX
78 likes
GMX Mail is a German-based free webmail service provided by GMX (Global Mail Exchange). In addition to an e-mail address, each GMX account includes a Mail Collector, Address Book, Organizer, and File Storage.
66 GMX alternatives
Cost / License
Free
Proprietary
Application typeApplication types
WebMail Provider
Calendar
Origin
Germany
EU
Platforms
Online
Android
iPhone
Android Tablet
iPad
Germany
EU
Good alternative?Is GMX a good alternative to Gmail?

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1comment
GMX vs Gmail Comments
Positive comment by Guest · Nov 10, 2019
German professionalism, precision, and perfection. It is like having a Mercedes.
1 of 1 comments
GMX is Free and ProprietaryGmail is also Free and Proprietary
Mailo
26 likes
The mail service which respects you.
91 Mailo alternatives
Cost / License
Freemium
Proprietary
Application typeApplication types
WebMail Provider
Email Client
Origin
France
EU
Platforms
Online
Android
iPhone
Android Tablet
iPad
OpenPGP
France
EU
+3
Good alternative?Is Mailo a good alternative to Gmail?

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2comments
Mailo vs Gmail Comments
Positive comment by daviwalle · May 15, 2020
Mailo is a good alternative to Gmail, since apart from email it also includes calendar, contacts, cloud, etc. It also respects your privacy, unlike Google
Negative comment by Guest · Feb 16, 2020
Weak strictly web based. Not a good interface and functionality like gmail
2 of 2 comments
Mailo is Freemium and ProprietaryGmail is Free and Proprietary
Mailo is Privacy focused and LightweightGmail is not according to our users
Kolab Now
43 likes
Kolab Now provides a suite of intuitive apps in a user friendly environment to make your day to day online comms easier, smarter and most importantly; secure.
84 Kolab Now alternatives
Cost / License
Paid
Open Source
Application typeApplication types
WebMail Provider
Mail Server
Origin
Switzerland
Platforms
Online
Software as a Service (SaaS)
DAVx5
Switzerland
Good alternative?Is Kolab Now a good alternative to Gmail?
mail2world
3 likes
the free email that has everyone talking!.
Cost / License
Freemium
Proprietary
Application typeApplication types
WebMail Provider
Calendar
Origin
United States
Platforms
Online
Good alternative?Is mail2world a good alternative to Gmail?
Mailture
Like
Mailture, a secure, business-oriented email service, is made to cater to all your emailing needs. With top-notch collaboration and communication features, Mailture offers much more than your usual inbox.
Cost / License
Paid
Proprietary
Application typeApplication types
WebMail Provider
Email Client
Origin
United Kingdom
Alerts
Discontinued
Platforms
Software as a Service (SaaS)
United Kingdom
Good alternative?Is Mailture a good alternative to Gmail?

12 of 15 Gmail alternatives

Gmail AlternativesOnly apps categorised as Calendar Apps

Alternatives list

Mailfence

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Proton Mail

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Tuta Mail

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Posteo

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mailbox

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mailbox vs Gmail Comments

Vivaldi Mail

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Fastmail

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Infomaniak kMail

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GMX

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Mailo

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Mailo vs Gmail Comments

Kolab Now

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mail2world

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Mailture

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