Open365 Alternatives

Open365 is described as 'The open source cloud with LibreOffice online - LibreOffice online + Seafile + KDE. Improve your productivity and communicate better with your team members. The world is moving forward. Welcome to the open source cloud!' and is a Office Suite in the office & productivity category. There are more than 25 alternatives to Open365 for a variety of platforms, including Windows, iPhone, Android, iPad and Android Tablet. The best alternative is LibreOffice, which is both free and Open Source. Other great apps like Open365 are ONLYOFFICE, Microsoft 365 (Office), Apache OpenOffice and CryptPad.

Open365 alternatives are mainly Office Suites but may also be Spreadsheet Apps or Word Processors. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of Open365.

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Open365

Free • Open Source
Office Suite

Android
Self-Hosted

The open source cloud with LibreOffice online - LibreOffice online + Seafile + KDE. Improve your productivity and...

Learn more about Open365

LibreOffice
Is this a good alternative?
Yes
No
Free • Open Source
Office Suite
Spreadsheet App
Word Processor
Mac
Windows
Linux
BSD
PortableApps.com
Flathub
56 alternatives to LibreOffice
LibreOffice is a free and open-source office suite that is compatible with other major office suites, and is available on all operating systems. It is an independently-developed version of the OpenOffice.org suite.
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LibreOffice Features
1. Ad-freeLibreOffice doesn't contain any form of external advertising.
2. Works OfflineLibreOffice can be used without the need to connect to the internet.
3. Extensible by Plugins/ExtensionsLibreOffice can be extended with add-ons, plugins and extensions.
4. PortableLibreOffice can be used from a USB stick or similar with no prior installation.
5. Spell CheckingLibreOffice can detect and correct all types of grammar and spelling mistakes.
Compatible with Microsoft Office
Export to Word
Print to PDF
GNU/linux-libre
Community-based
Multiple languages
Built-in PDF converter
Export to office formats
Export to PDF
Multiplatform
ONLYOFFICE
Is this a good alternative?
Yes
No
Free Personal • Open Source
Office Suite
Spreadsheet App
Word Processor
Mac
Windows
Linux
Online
Android
iPhone
Android Tablet
iPad
Self-Hosted
Software as a Service (SaaS)
Cloudron
Flatpak
Flathub
AppImageHub
Snapcraft
61 alternatives to ONLYOFFICE
ONLYOFFICE is an open-source online collaborative office combining editors for documents, spreadsheets, presentations, and forms. It is compatible with all popular formats and features maximum support for MS Office files.
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ONLYOFFICE Features
1. Works OfflineONLYOFFICE can be used without the need to connect to the internet.
2. Real time collaborationMultiple users can work together in ONLYOFFICE simultaneously.
3. PortableONLYOFFICE can be used from a USB stick or similar with no prior installation.
4. End-to-End EncryptionONLYOFFICE has E2E Encryption, for entire or parts of the app.
5. Privacy focusedONLYOFFICE is considered a privacy friendly alternative.
6. Dark ModeONLYOFFICE supports dark mode for comfortable usage in low light conditions.
7. Ad-freeONLYOFFICE doesn't contain any form of external advertising.
8. Spell CheckingONLYOFFICE can detect and correct all types of grammar and spelling mistakes.
Compatible with Microsoft Office
Tabbed interface
Nextcloud integration
FOSS
Cloud based
Export to PDF
Collaborative Workspaces
Custom fonts
Integrated Chat
Equation editor
Microsoft 365 (Office)
Is this a good alternative?
Yes
No
Paid • Proprietary
Office Suite
Spreadsheet App
Word Processor
Mac
Windows
Android
iPhone
Android Tablet
HUAWEI AppGallery
Windows Phone
iPad
44 alternatives to Microsoft 365 (Office)
Microsoft 365 (formerly Microsoft Office Suite) is an office suite of applications, servers and services.
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Microsoft 365 (Office) Features
1. Works OfflineMicrosoft 365 (Office) can be used without the need to connect to the internet.
2. PDF annotationMicrosoft 365 (Office) support PDF Annotation for highlighting, notes etc
3. Cloud SyncSync your data (notes, documents, bookmarks, etc.) across your different devices and to the cloud.
4. Real time collaborationMultiple users can work together in Microsoft 365 (Office) simultaneously.
5. Ad-freeMicrosoft 365 (Office) doesn't contain any form of external advertising.
6. Support for scriptingMicrosoft 365 (Office) supports scripts and macros to automate or customize tasks.
7. Extensible by Plugins/ExtensionsMicrosoft 365 (Office) can be extended with add-ons, plugins and extensions.
Usability
Onedrive integration
Student discount
Apache OpenOffice
Is this a good alternative?
Yes
No
Free • Open Source
Office Suite
Spreadsheet App
Word Processor
Mac
Windows
Linux
BSD
PortableApps.com
53 alternatives to Apache OpenOffice
Apache OpenOffice is a leading open-source office suite that offers free applications for word processing, spreadsheet, presentations, graphics, databases and more. All data is stored in an open standard format, though Open Office can also read and write files from other common...
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Apache OpenOffice Features
1. PortableApache OpenOffice can be used from a USB stick or similar with no prior installation.
2. Syntax HighlightingApache OpenOffice supports syntax highlighting for various programming and markup languages.
Compatible with Microsoft Office
Built-in PDF converter
Export to PDF
Custom templates
CryptPad
Is this a good alternative?
Yes
No
Freemium • Open Source
Office Suite
Word Processor
Team Collaboration Tool
Self-Hosted
Software as a Service (SaaS)
66 alternatives to CryptPad
CryptPad is a private-by-design alternative to popular office tools and cloud services. All the content stored on CryptPad is encrypted before being sent, which means nobody can access your data unless you give them the keys.
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CryptPad Features
1. End-to-End EncryptionCryptPad has E2E Encryption, for entire or parts of the app.
2. Real time collaborationMultiple users can work together in CryptPad simultaneously.
3. No registration requiredYou can use most of the features in CryptPad without registration.
4. Privacy focusedCryptPad is considered a privacy friendly alternative.
5. Kanban BoardCryptPad allows you to organize your workflow by moving cards with drag-and-drop functionality between multiple columns.
6. No TrackingCryptPad will not track you or use your personal data.
7. Support for MarkDownCryptPad supports MarkDown for document formatting.
8. WYSIWYG HTML EditorCryptPad allows you to make and preview changes to an application or website in real time, without needing to know code.
9. WYSIWYG SupportCryptPad integrates a WYSIWYG editor to edit the look and content of a document, page, or file.
Collaborative writing
Document sharing
Privacy
Direct file uploading
Encrypted Notes
Multiple languages
WPS Office
Is this a good alternative?
Yes
No
Freemium • Proprietary
Office Suite
Word Processor
Spreadsheet App
Mac
Windows
Linux
Android
iPhone
Chrome OS
Android Tablet
iPad
45 alternatives to WPS Office
WPS Office is a free, lightweight, feature-rich comprehensive office suite with high compatibility. Capable of handling texts in Writer, Presentation, Spreadsheet, and PDF files.
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WPS Office Features
1. Spell CheckingWPS Office can detect and correct all types of grammar and spelling mistakes.
2. Sign PDF filesWPS Office support signing a PDF document digitally on a touch screen etc.
3. Ad-freeWPS Office doesn't contain any form of external advertising.
Compatible with Microsoft Office
Built-in PDF converter
Tabbed interface
Edit PDF
Microsoft Office Outlook
Is this a good alternative?
Yes
No
Paid • Proprietary
Email Client
Calendar App
Mac
Windows
Online
Android
iPhone
Android Tablet
Windows Phone
iPad
Apple Watch
Android Wear
135 alternatives to Microsoft Office Outlook
Microsoft Outlook, part of the Microsoft 365 (Office) (not to be confused with Microsoft Outlook Express), is a personal information manager that lets you manage your e-mail, calendar, contacts, and tasks.
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Microsoft Office Outlook Features
1. Email OrganizerMicrosoft Office Outlook allows you to take control of your inbox by filtering and control tools.
2. Calendar IntegrationMicrosoft Office Outlook lets you sync your tasks and events with your calendar application.
3. Calendar ViewMicrosoft Office Outlook has a built-in calendar view to have a clear overview of your content over time.
4. Support for AliasesMicrosoft Office Outlook supports aliases, so you can receive email without exposing your main email address
5. Unified inboxView e-mails (or similar) from all accounts in one unified view with Microsoft Office Outlook.
6. Multiple Account supportMicrosoft Office Outlook support multiple accounts without the need to logout and login
7. Works OfflineMicrosoft Office Outlook can be used without the need to connect to the internet.
8. Cloud SyncSync your data (notes, documents, bookmarks, etc.) across your different devices and to the cloud.
9. Dark ModeMicrosoft Office Outlook supports dark mode for comfortable usage in low light conditions.
Exchange
Native application
Onenote Desktop Integration
Contacts
Built-in Calendar
Address book integration
Onedrive integration
Smart attachments
Custom rules
Exchange Integration
OpenProject
Is this a good alternative?
Yes
No
Freemium • Open Source
Project Management Tool
Task Management Tool
Time Tracking Tool
Linux
Self-Hosted
Ruby
Cloudron
185 alternatives to OpenProject
OpenProject is an open-source project management software with a wide set of features and plugins. It supports project timelines / Gantt charts, issue tracking, wiki, document management, time and cost reporting, code management, Scrum and much more.
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OpenProject Features
1. Kanban BoardOpenProject allows you to organize your workflow by moving cards with drag-and-drop functionality between multiple columns.
2. Gantt-chartsOpenProject allows you to visualize your project plan through a timeline with schedule bars and keep track of the work done.
3. Hierarchical StructureOrganize your notes, pages, documents, etc., hierarchically with OpenProject.
Work Item Tracking
Agile boards
Email tracking
Timeline
Cost estimate
Reporting
Wiki
Meeting
Splitting costs
Cost Calculator
Claws Mail
Is this a good alternative?
Yes
No
Free • Open Source
Email Client
Calendar App
Windows
Linux
BSD
88 alternatives to Claws Mail
Claws Mail is an email client (and news reader), based on GTK+, featuring

Quick response Graceful, and sophisticated interface Easy configuration, intuitive operation Abundant features Extensibility Robustness and stability.
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Claws Mail Features
1. LightweightClaws Mail consumes less device resources compared to similar apps.
2. Extensible by Plugins/ExtensionsClaws Mail can be extended with add-ons, plugins and extensions.
3. Multiple Account supportClaws Mail support multiple accounts without the need to logout and login
4. No registration requiredYou can use most of the features in Claws Mail without registration.
5. Import/Export OPML FeedsImport and export your feed subscriptions into OPML format with Claws Mail.
6. Spam FilterClaws Mail can detect unsolicited, unwanted and virus-infected emails, calls, files, etc.
7. PortableClaws Mail can be used from a USB stick or similar with no prior installation.
IMAP Support
Customizable
Multiple languages
Integrated Email Client
Content Filtering
Built-in RSS reader
Apple Mail
Is this a good alternative?
Yes
No
Free • Proprietary
Email Client
Mac
iPhone
iPad
80 alternatives to Apple Mail
There’s big news attached. The best way to manage email on a Mac, according to Apple.
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Apple Mail Features
1. Email OrganizerApple Mail allows you to take control of your inbox by filtering and control tools.
Bundled with macOS
CalDAV Support
CardDAV Support
Exchange
Rich text editing
Encrypted Email
Customizable