Perplexity AI sued over alleged theft of wake word tech
DaVoice sued Perplexity AI in California federal court on Thursday, September 24, 2026, alleging the company stole proprietary technology tied to wake-word detection for AI assistants, according to Reuters.
Trade Secrets Allegation
The complaint, filed in the U.S. District Court for the Northern District of California, centers on wake-word technology—the passive listening capability that allows voice assistants to activate when hearing a specific phrase. Reuters reports the lawsuit alleges Perplexity used technology "built with DaVoice's proprietary source code, inference logic, network architecture, training approaches, training data, and know-how."
The complaint itself is heavily redacted, limiting the publicly available details of the specific claims. However, the filing indicates the two companies collaborated on unspecified technology before the alleged misappropriation occurred. DaVoice contends that Perplexity leveraged confidential information from that relationship to develop its own voice-activation systems.
Context and Timing
The lawsuit surfaces as Perplexity AI continues to expand its suite of AI agent capabilities. Wake-word technology is a critical component of voice-first agent systems, enabling hands-free activation and continuous passive listening. The technology underpins many consumer voice assistants and is particularly valuable for edge devices and embedded AI applications.
No statements from either party have been released, and the case remains in early stages. The redacted nature of the complaint suggests either trade secret sensitivity or protective orders issued by the court. As of now, no damages amounts, settlement discussions, or timeline for resolution have been disclosed.
What's at Stake
The dispute highlights tensions within the AI agent ecosystem over intellectual property boundaries—particularly when startups claim larger AI companies have misappropriated innovations developed during partnerships or joint efforts. Trade secret litigation in the AI space often hinges on proving what information was confidential, whether it was disclosed under agreement, and whether defendants independently developed competing technologies.
Perplexity AI, which has aggressively expanded into voice-based search and agentic features, has not yet publicly responded to the lawsuit. The case will test how California courts interpret trade secret theft claims in the emerging AI agent economy.