Five of the world's largest technology companies have announced a joint initiative to combat the spread of misinformation online, committing billions of dollars to develop new tools and establish industry-wide standards.

The initiative includes the development of AI-powered fact-checking systems that can flag potentially false claims in real-time across multiple languages, as well as new transparency requirements for algorithmically amplified content.

Each participating company will make its content moderation data available to independent researchers for the first time, allowing academic scrutiny of how information spreads on their platforms.

Critics, however, argue that the initiative doesn't go far enough and warn that the companies' financial interests may conflict with aggressive enforcement of truth standards.

The program is set to launch in phases over the next 18 months, with initial focus on health-related and election-related misinformation.