Google just convinced some of its fiercest competitors to adopt its AI watermarking system. At Google I/O 2026 on May 19, the company announced that OpenAI, Kakao, and ElevenLabs are all integrating SynthID, Google’s imperceptible watermarking technology, into their own platforms.
The partnerships represent a rare moment of cross-industry alignment in AI, where companies that normally compete for market share are instead collaborating on a shared problem: proving whether the content you’re looking at was made by a human or a machine.
The numbers behind the watermark
SynthID has already been applied to over 100 billion images and videos. For audio, the equivalent of 60,000 years of content has been watermarked.
The technology works by embedding signals into AI-generated content that are invisible to humans but detectable by verification tools. Crucially, these signals survive common editing operations like cropping, compression, and color adjustment.
