Mark Zuckerberg and Elon Musk were once poised to fight in a cage match in 2023, before Zuckerberg called it off, saying that Musk was "not serious." Now, the two billionaires have gone from the brink of battle to using each other's technology.

Meta’s upcoming Community Notes feature for monitoring misinformation will use some technology developed by Musk’s X for its similar service.

Earlier this year, Mark Zuckerberg said that, effectively, Meta was getting out of the ‘caring about the truth’ business and ditching third-party fact-checkers. Now it’s handing over the keys to its users. Meta announced that it will start to roll out a Community Notes feature, similar to the one on X, across its major social platforms.

Meta will begin one of the company's most significant overhauls ever for how it fact-checks information on its platforms. On March 18, Meta

With misinformation spreading rapidly on social media, Meta's shift to crowd-sourced fact-checking is a bold move. However, whether Community Notes can effectively counter false information without penalizing misleading content remains to be seen.

Meta will test Community Notes in the US starting March 18. This uses X's technology and allows users to flag false or misleading content. About 200,000 users have signed up to contribute. The system replaces third-party fact-checking with a crowd-sourced model.

Meta will begin testing its Community Notes feature, which replaces fact-checking with crowdsourced commentary, next week. It relies on X's open-source tech.