--- title: LibreOffice slams Euro-Office as ‘de facto ally’ of... description: The Document Foundation (TDF), makers of LibreOffice, has published an open letter criticizing Euro-Office ahead of its 1.0 stable release on June 9. TDF's... canonical: https://daily.dev/posts/libreoffice-slams-euro-office-as-de-facto-ally-of-microsoft-jq1yn3nk4 twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: LibreOffice slams Euro-Office as ‘de facto ally’ of Microsoft | daily.dev og:description: The Document Foundation (TDF), makers of LibreOffice, has published an open letter criticizing Euro-Office ahead of its 1.0 stable release on June 9. TDF's... og:url: https://daily.dev/posts/libreoffice-slams-euro-office-as-de-facto-ally-of-microsoft-jq1yn3nk4 og:image: https://api.daily.dev/og/posts/JQ1Yn3NK4.png og:image:alt: LibreOffice slams Euro-Office as ‘de facto ally’ of Microsoft og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # LibreOffice slams Euro-Office as ‘de facto ally’ of Microsoft **[omg\! ubuntu\!](https://daily.dev/sources/omgub)** · 2 min read · 0 upvotes · 0 comments ## Summary The Document Foundation (TDF), makers of LibreOffice, has published an open letter criticizing Euro-Office ahead of its 1.0 stable release on June 9. TDF's Italo Vignoli disputes Euro-Office's claim to be the first European open-source office suite, noting OpenOffice.org predates it by over two decades. More critically, he argues that Euro-Office defaults to Microsoft's proprietary OOXML format, making it a 'de facto ally' of Microsoft despite marketing itself as a digital sovereignty solution. Euro-Office is a fork of ONLYOFFICE backed by Nextcloud, Proton, and IONOS, and is web-based rather than a standalone desktop application. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [An open letter to office suite users, just before the Euro-Office announcement](https://daily.dev/posts/an-open-letter-to-office-suite-users-just-before-the-euro-office-announcement-et2bhh7zu) · Lobsters · 0 upvotes · 0 comments - [LibreOffice accuses Euro-Office's methods as being just as bad as Microsoft's, but with an open-source angle](https://daily.dev/posts/libreoffice-accuses-euro-office-s-methods-as-being-just-as-bad-as-microsoft-s-but-with-an-open-sour-bowlxcimk) · XDA Developers · 1 upvotes · 0 comments - [LibreOffice Questions Whether Euro-Office is Truly Sovereign](https://daily.dev/posts/libreoffice-questions-whether-euro-office-is-truly-sovereign-a71qedvee) · It's Foss · 4 upvotes · 0 comments --- Tags: [#linux](https://daily.dev/tags/linux) [View this post on daily.dev](https://daily.dev/posts/libreoffice-slams-euro-office-as-de-facto-ally-of-microsoft-jq1yn3nk4) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"LibreOffice slams Euro-Office as ‘de facto ally’ of Microsoft","url":"https://daily.dev/posts/libreoffice-slams-euro-office-as-de-facto-ally-of-microsoft-jq1yn3nk4","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/libreoffice-slams-euro-office-as-de-facto-ally-of-microsoft-jq1yn3nk4"},"datePublished":"2026-06-08T17:02:44.482Z","dateModified":"2026-06-08T17:19:10.632Z","description":"The Document Foundation (TDF), makers of LibreOffice, has published an open letter criticizing Euro-Office ahead of its 1.0 stable release on June 9. 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