Best Free and Open Source Alternatives to Microsoft Office

Microsoft’s stance for decades was that community creation and sharing of communal code (later to be known as free and open source software) represented a direct attack on their business. Their battle with Linux stretches back many years. Back in 2001, former Microsoft CEO Steve Ballmer famously tarnished Linux “a cancer that attaches itself in an intellectual property sense to everything it touches”. Microsoft also initiated its “Get the Facts” marketing campaign from mid-2003, which specifically criticized Linux server usage, total cost of ownership, security, indemnification and reliability. The campaign was widely criticized for spreading misinformation.

However, in recent years, there has been a partial shift by Microsoft to embrace the open source software paradigm. For example, some of their code is open sourced. Examples include Visual Studio Code, .NET Framework, Atom, and PowerShell. They have also made investments in Linux development, server technology and organizations including the Linux Foundation and Open Source Initiative. They have made acquisitions such as Xamarin to help mobile app development, and GitHub a hugely popular code repository for open source developers. And they have partnered with Canonical, the developers of the popular Ubuntu distro. But many developers remain hugely sceptical about Microsoft and their apparent shift to embrace open source.

This series looks at the best free and open source alternatives to products and services offered by Microsoft. This article focuses on the best free and open source alternatives to Microsoft Office.

Microsoft Office, or simply Office, is a family of client software, server software, and services developed by Microsoft.

Microsoft has promoted Office 365 as the primary means of obtaining Microsoft Office. This is a subscription service.

What are the best open source alternatives to Office 365? This article focuses on replacements for only some of the components of Office 365.

1. LibreOffice

When it comes to open source open source office suites our strongest recommendation goes to LibreOffice. It provides Writer (word processing), Calc (spreadsheets), Impress (presentations), Draw (vector graphics and flowcharts), Base (databases), and Math (formula editing).

Users who’ve used Microsoft Office for years will appreciate that LibreOffice has made enormous strides in offering better compatibility with DOCX, XLSX, and PPTX files. For example, LibreOffice’s DOCX is saved in native 2013/2016/2019 mode.

LibreOffice has native support for a modern and open standard, the Open Document Format (ODF). ODF 1.3’s most important new features are document digital signatures and OpenPGP-based XML document encryption. The new ODF also boasts improvements in change tracking, and elements first pages, text, numbers, and charts.

LibreOffice is available on all major desktop operating systems. Besides Linux, it runs under macOS, ChromeOS, and Windows.

2. ONLYOFFICE

Like LibreOffice, ONLYOFFICE is a high quality free and open source office and productivity suite.

ONLYOFFICE includes an online editing suite called ONLYOFFICE Docs. It combines text, spreadsheet, presentation and form editors that include features similar to Microsoft desktop editors (Word, Excel and PowerPoint). It works with most popular formats: DOCX, ODT, XLSX, ODS, CSV, PPTX, ODP, etc.

ONLYOFFICE is delivered either as SaaS or as an installation for deployment on a private network.

All articles in this series:

Alternatives to Microsoft's Products and Services
	Bing offers search services, including web, video, image and map search products. It's developed using ASP.NET.
	Calculator is a simple yet powerful calculator that includes standard, scientific, programmer, and graphing calculator functionality, as well as a set of converters between various units of measurement and currencies.
	Dynamics 365 is a product line of enterprise resource planning and customer relationship management intelligent business applications.
	Edge is a cross-platform web browser. It is a Chromium-based browser with Blink and V8 engines.
	Exchange Server is a mail server and calendaring server. Exchange uses a single building block architecture.
	GitHub is a distributed version control and source code management functionality service. It includes non-Git elements.
	Office is a family of client software, server software, and services. Microsoft has promoted Office 365 as the primary means of obtaining Office.
	OneDrive is a file hosting service and synchronization service. Users can upload Microsoft Office documents to OneDrive.
	OneNote is a note-taking program for free-form information gathering and collaboration. It gathers users’ notes, drawings, screen clippings, and audio commentaries.
	Outlook is a personal information manager that's primarily an email client. It includes calendaring, task managing, contact managing, note-taking, journal logging, and web browsing.
	Planner lets users create Kanban boards using content-rich tasks with features including files, checklists, and labels.
	Project lets you develop schedules, assign resources, track progress, manage budget, and more. It's part of the Microsoft Office enterprise project management product.
	Publisher is a desktop publishing application with focus on page layout and design. Use text, photos and links to make professional publications personal.
	SharePoint is a web-based collaborative platform that’s often used as a document management and storage system.
	Skype is software for VoIP-based videotelephony, videoconferencing and voice calls. The software also provides instant messaging, file transfer, debit-based calls to landline and mobile telephones (over traditional telephone networks), and more.
	Snipping Tool is a screenshot utility. It can take still screenshots of an open window, rectangular areas, a free-form area, or the entire screen.
	SwiftKey is a virtual keyboard app for Android. SwiftKey learns from previous typed text and outputs predictions based on currently inputted text and what it has learned.
	Teams is a business communication platform. The service integrates with the company’s Office 365 subscription office productivity suite.
	Terminal is billed as “a modern, fast, efficient, powerful, and productive terminal application for users of command-line tools and shells like Command Prompt, PowerShell, and WSL”. It offers multiple tabs, panes, Unicode and UTF-8 character support, a GPU accelerated text rendering engine, and custom themes, styles, and configurations.
	To Do is a cloud-based task management application. It allows users to manage their tasks from a smartphone, tablet and computer.
	Visio is a diagramming and vector graphics application. Database modeling in Visio revolves around a Database Model Diagram (DMD).
	Visual Studio is an integrated development environment. It is used to develop computer programs, as well as websites, web apps, web services and mobile apps.
	Whiteboard provides a freeform, intelligent canvas where you and your team can create, and collaborate visually via the cloud. Designed for touch, type, and pen, it lets you write or draw as smoothly as you would with ink.
	Yammer is a social-networking platform for organizations. It’s a closed platform sometimes described as Facebook for businesses.