Microsoft 365 isn't the only office suite, nor does it have all the best tools on the market. You can easily replace your paid Microsoft 365 subscription with these equally good free apps.
The digital world is full of amazing applications built and maintained by global communities focused on creating powerful and accessible tools. Taking the time to explore these alternatives can prove that you can absolutely continue working in your familiar ways without the added cost.
Obsidian - A great alternative to Word
If you primarily use Word for document creation and quickly syncing data across devices, Obsidian is an option you can hardly ignore. Technically, it's not open source, but it's completely free for personal use.
Obsidian starts up very quickly and uses Markdown formatting, meaning every note you write is a simple .md text file. You can format headings, lists, bold text, and links using simple syntax. The content in the file remains readable in any text editor. It doesn't risk being tied to a proprietary format like .docx.
Gnumeric - A good alternative to Excel
Many people feel that commercial software is increasingly resource-intensive, and if you need fast processing speeds with guaranteed mathematical accuracy, Gnumeric is definitely the best choice. It eliminates unnecessary interface elements and background processes that often slow down performance, giving you a streamlined environment dedicated solely to numerical computation.
Gnumeric is renowned for being far more accurate than Excel when performing advanced statistical tasks. Switching away from the Microsoft ecosystem is often hampered by fears of losing essential functionality, but Gnumeric handles this brilliantly. It effectively includes every Excel spreadsheet function, ensuring compatibility with your existing files and workflows.
However, it doesn't just replicate the old standards; you also get 154 unique functions not found in the Microsoft ecosystem. This is incredibly useful if you work in telecommunications engineering or financial derivatives. While the standard features in LibreOffice Calc may seem simple, the specific precision that Gnumeric provides sets it apart from other open-source alternatives to Excel.
Mailspring - A free app that replaces Outlook.
The Outlook application on Windows uses Microsoft's servers to access non-Microsoft accounts, such as Gmail, which is quite inconvenient for personal email. The interface is also quite cluttered with advertised Microsoft services and ads in the message list, and there's no truly unified inbox if you manage multiple accounts.
Mailspring fixes most of these problems completely free of charge. This open-source desktop email application offers a neat four-column layout and a truly unified inbox, displaying all accounts in chronological order, along with built-in themes.
Mailspring's real highlight is its productivity features. You can defer emails, schedule messages to be sent later, and set reminders if recipients haven't responded within a few days. There's also email translation for around 100 languages and an analytics dashboard that tracks open and reply rates, which is very useful for monitoring.
Most features work on the free plan, but with Mailspring Pro, which costs around $8 per month, you can unlock unlimited email tracking and deferral.
Proton Drive - Secure and private OneDrive
Proton is the gold standard when it comes to end-to-end encrypted cloud storage. With services like OneDrive, Microsoft practically holds the "key," meaning it can technically scan your content whenever it wants due to terms of service. Meanwhile, Proton Drive encrypts everything locally before the data is transferred to the server. This is crucial because it means Proton itself cannot see your filenames or file contents.
By switching to Proton Drive, you're moving your digital life to Switzerland, taking advantage of some of the world's strictest privacy laws to protect your information from unwanted surveillance and data breaches. Additionally, the service is open source. This means external security researchers can examine the code to verify that the encryption works exactly as the company claims.