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Threads Wants to Join the Fediverse, But Some Mastodon Users Say No Way

Some Mastodon admins pledge to block connecting their servers to Meta's Twitter-like clone Threads, which is preparing to adopt the ActivityPub protocol.

 & Michael Kan Principal Reporter

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Mark Zuckerberg’s Threads app will eventually support cross-communication with Mastodon, which could help both social networks beat Twitter. But not everyone is a fan of the idea.

A growing number of Mastodon admins and moderators are vowing to not connect their servers to Threads and other Meta projects that try to join Mastodon’s decentralized social network.

The Mastodon admins have jopined the so-called Anti-Meta Fedi Pact, which seeks to derail the company’s entry into Mastodon’s network. The creator of the pact, Vantablack, points to Meta’s allegedly “long track record of pure evil,” which has involved failing to stop misinformation, hate speech, and calls for violence, along with the company’s myriad of privacy scandals. “Which brings us to the need many feel to protect ourselves from this insidious megacorp,” she wrote

Vantablack essentially fears that unsavory content from Threads, such as harassment, will be able to easily flood the fediverse. Meta’s privacy policy also indicates content from Mastodon that appears on Threads will be collected, including users’ IP addresses, enabling the company to data-mine and surveil them for advertising purposes. 

“The fediverse is good precisely because distributed moderation makes it possible to filter out bad shit easier,” she added. “That all goes out the window the moment Meta sets foot here and people refuse to block them because ‘that's where everyone is.’”

Threads plans on joining Mastodon's network and others, such as WordPress, by supporting the ActivityPub protocol, which Mastodon servers also use. When that’ll happen remains unclear. Meta has only said it’ll happen “soon.” But in the meantime, Vantablack is trying to rally the Mastodon community into blocking interoperability between both platforms. 

Over 500 admins and moderators have already added their names to the pact. But it looks like the major Mastodon servers have yet to join. In the meantime, the social network’s founder Eugen Rochko has responded to the concerns about Threads, saying the decentralized nature of Mastodon makes it easy for servers to deny the cross-communication. 

“We expect that eventually Mastodon and Threads will be interoperable, and from a technical standpoint, users will be able to follow each other and exchange messages,” he wrote. “However, it is up to the operator of the Mastodon server you’re are using to decide whether to allow communication with Threads or not.”

Rochko also said Thread’s upcoming support for ActivityPub represents a “clear victory” in Mastodon’s effort to push the tech industry from locking users into one platform. Meta itself has stated once Threads integrates the ActivityPub protocol, its users will be able to migrate their accounts to another compatible social network. 

“The fact that large platforms are adopting ActivityPub is not only validation of the movement towards decentralized social media, but a path forward for people locked into these platforms to switch to better providers,” Rochko added.

About Our Expert

Michael Kan

Michael Kan

Principal Reporter

My Experience

I've been a journalist for over 15 years. I got my start as a schools and cities reporter in Kansas City and joined PCMag in 2017, where I cover satellite internet services, cybersecurity, PC hardware, and more. I'm currently based in San Francisco, but previously spent over five years in China, covering the country's technology sector.

Since 2020, I've covered the launch and explosive growth of SpaceX's Starlink satellite internet service, writing 600+ stories on availability and feature launches, but also the regulatory battles over the expansion of satellite constellations, fights with rival providers like AST SpaceMobile and Amazon, and the effort to expand into satellite-based mobile service. I've combed through FCC filings for the latest news and driven to remote corners of California to test Starlink's cellular service.

I also cover cyber threats, from ransomware gangs to the emergence of AI-based malware. In 2024 and 2025, the FTC forced Avast to pay consumers $16.5 million for secretly harvesting and selling their personal information to third-party clients, as revealed in my joint investigation with Motherboard.

I also cover the PC graphics card market. Pandemic-era shortages led me to camp out in front of a Best Buy to get an RTX 3000. I'm now following how the AI-driven memory shortage is impacting the entire consumer electronics market. I'm always eager to learn more, so please jump in the comments with feedback and send me tips.

The Best Tech I've Had:

  • My first video game console: a Nintendo Famicom
  • I loved my Sega Saturn despite PlayStation's popularity.
  • The iPod Video I received as a gift in college
  • Xbox 360 FTW
  • The Galaxy Nexus was the first smartphone I was proud to own.
  • The PC desktop I built in 2013, which still works to this day.

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