Europe’s push for digital sovereignty just collided with open-source orthodoxy. The Free Software Foundation delivered a stark warning to OnlyOffice this week. You can’t bolt extra restrictions onto the GNU AGPLv3 to handcuff forks. The dispute traces back to Euro-Office, a Microsoft Office rival forked from OnlyOffice by Nextcloud and IONOS. OnlyOffice cried foul over removed branding. Now the FSF has weighed in, siding decisively with the fork.
Picture this. Nextcloud and IONOS announce Euro-Office on March 27, 2026—a sovereign suite for EU institutions wary of Big Tech lock-in. They base it on OnlyOffice’s AGPLv3 code. Days later, OnlyOffice suspends its Nextcloud partnership, accusing the project of stripping required logos and attributions (Slashdot).
OnlyOffice CEO Lev Bannov didn’t mince words in a March 30 blog post. “The core issue here isn’t just about what the AGPL license states, but about the additional provisions we, as the authors, have included.” He pointed to Section 7 of AGPLv3, added to their LICENSE.txt on May 25, 2021, demanding retention of the OnlyOffice logo as a “reasonable legal notice or author attribution.” Remove it? No dice. Bannov invited Euro-Office to seek FSF review. “If FSF determines that our license and project align with AGPLv3, we will continue as an open-source initiative. However, if the decision goes against us, we are ready to consider other options.”
AGPLv3’s Fine Print Ignites the Fire
Section 7 lets authors add limited terms—disclaim warranties, preserve notices, nix misrepresentations. But Section 10 draws a line. No “further restrictions” on the four freedoms: use, study, modify, share. Nextcloud’s GitHub commit laid it bare: the logo mandate exceeds 7(b). Logos aren’t legal notices. Pair it with 7(e)’s trademark disclaimer, and you’ve got an unenforceable trap—a restriction users can strip out.
Krzysztof Siewicz, FSF licensing and compliance manager, hammered this home in a blog post. “It is possible to modify the (A)GPLv3 with additional terms, but only by adhering to the terms of the license.” He quoted AGPLv3 directly: “If the Program as you received it, or any part of it, contains a notice stating that it is governed by this License along with a term that is a further restriction, you may remove that term.” OnlyOffice’s extras? Further restrictions. Removable. Siewicz urged clarity: affirm AGPLv3 licensing, let users ditch the add-ons, scrub them from future code. “Confusing users by attaching further restrictions to any of the FSF’s family of GNU General Public Licenses is not in line with free software.”
Nextcloud pounced. Their April 17 response cited the FSF, plus heavy hitters. Bradley M. Kuhn, AGPLv3 author, backed them via Software Freedom Conservancy: the clause empowers recipients against such tricks. Dutch lawyer Maurits Westerik agreed—the logo isn’t 7(b) material. FSF’s own guidance confirms: logos aren’t attributions.
But OnlyOffice dug in. Their code includes proprietary bits, like a modified CEF binary fetched over plain HTTP—supply-chain nightmare, as LWN.net noted on April 15. Forks like Euro-Office patched it. Even their CLA enforcement wavers; some PRs merged sans signature.
Stakes Rise for Forks and Sovereignty
This isn’t abstract. Euro-Office targets EU data protection, dodging vendor lock. OnlyOffice powers real-time collaboration in Nextcloud hubs worldwide. A pivot to proprietary? Forks proliferate anyway—community comments on Slashdot cheer that. “This seems like a completely self-destroying empty threat,” one wrote.
Linuxiac captured the escalation on April 17: FSF says AGPLv3 can’t curb downstream freedom. Siewicz again: logo retention is removable. X buzzed too—@linuxiac tallied likes, Slashdot amplified.
So where next? OnlyOffice faces pressure. Comply, lose branding leverage. Relicense, risk exodus to forks. FSF’s shot across the bow reinforces copyleft’s core: freedom trumps control. Forks thrive. Sovereign clouds advance. And AGPLv3? Stronger for the clarification.
Industry watchers see ripples. Badgeware—logo-forcing licenses—falters under scrutiny. Projects like Nextcloud, born from forks themselves, prove the model. OnlyOffice built a decade on AGPL openness. Now it tests that commitment. Watch for their move. The code’s out there. Forks don’t forget.