LibreOffice slams rival Euro-Office as a ‘de facto ally’ of Microsoft… is attracting attention across the tech world. Analysts, enthusiasts, and industry observers are watching closely to see how this story develops.
This update adds another signal to a fast-moving sector where product decisions, platform changes, and competition can quickly shape the market.
When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.
The Document Foundation – the organization behind LibreOffice – has publicly criticized Euro-Office over concerns that it does not genuinely promote European digital sovereignty despite its marketing as a viable European alternative to the likes of Microsoft Office.
LibreOffice described Euro-Office as a “freeware clone” of its Big Tech rival, claiming its strategy is to mimic Microsoft’s interface and workflows.
Conversely, OpenOffice.org and LibreOffice “are two genuine open-source office suites, built from source code that originated in Europe,” founding member Italo Vignoli wrote in an open letter.
In the letter, Vignoli slated Microsoft’s “horrible proprietary OOXML format,” acknowledging the format’s use in preventing sovereignty efforts by supporting vendor lock-in. An understandable strategy by a tech vendor that, historically at least, hasn’t actively supported sovereignty efforts over clear desires to grow the business.
However, while that much is understandable, Vignoli questions why “Euro-Office defaults to the fully proprietary OOXML document format,” arguing it simply reinforces Microsoft’s ecoplatform and creates a long-term dependency on the company’s products.
The original announcement described Euro-Office as a “sovereign replacement for Microsoft Office” with an “intuitive interface” and “strong compatibility.” The familiar interface is believed to be intentional, to make migration easier.
European tech firms like IONOS, Nextcloud, Eurostack, XWiki, OpenProject, Soverin, Abilian and BTactic are behind the initiative.
Another sovereignty concern is Euro-Office’s potential – if not slightly disconnected – ties to Russia. Euro-Office is actually based on an existing project called OnlyOffice, having only recently parted ways from that project in March 2026.
Cybernews has revealed up to 99% of the codebase can be traced back to developers working in Russian time zones with only a small proportion of contributions come from the European consortium itself.
Additionally, it appears that the new sovereign project continues to merge selected code changes from the upstream project, indicating it’s still reliant on Russian software developers.
With this in mind, users could have concerns over vulnerabilities, malicious code insertion and broader dependency risks that totally negate the sovereign effort in the first place.
Follow TechRadar on Google News and add us as a preferred source to get our expert news, reviews, and opinion in your feeds.
With several years’ experience freelancing in tech and automotive circles, Craig’s specific interests lie in tech innovation that is designed to better our lives, including AI and ML, productivity aids, and smart fitness. He is also passionate about cars and the decarbonisation of personal transportation. As an avid bargain-hunter, you can be sure that any deal Craig finds is top value!
Please logout and then login again, you will then be prompted to enter your display name.
Why This Matters
This development may influence user expectations, future product strategy, and the competitive balance inside the broader technology industry.
Companies in adjacent segments often react quickly to similar moves, which is why stories like this tend to matter beyond a single announcement.
Looking Ahead
The full impact will become clearer over time, but the story already highlights how quickly the modern tech landscape can evolve.
Observers will continue tracking the next steps and how they affect products, users, and the wider market.
