DaVoice Sues Perplexity Over Alleged Misuse of Wake-Word Technology

A collaboration over voice technology has turned into a federal lawsuit. DaVoice sued Perplexity AI on September 24, alleging that Perplexity used confidential wake-word technology it accessed while the companies worked together. The claim concerns technology used to activate an assistant, not the answers an assistant gives after it wakes.

What the collaboration allegedly exposed

DaVoice says Perplexity gained access to its technology through a direct business relationship, then used the information without permission. That makes this a dispute about material allegedly shared with a partner, rather than a claim about technology gathered from the public internet. Access and unauthorized use are separate parts of DaVoice’s accusation; neither is a court finding.

The material DaVoice describes includes source code, inference logic, network architecture, training approaches and training data. Those categories reach beyond a finished feature to the methods and materials used to build one. DaVoice also says it has collaborated with Volkswagen and Samsara on wake-word technology, though those relationships are not part of its claim against Perplexity.

The small layer before an assistant responds

A wake word is the phrase that prompts a voice assistant to start responding. The detection system must pick up that phrase quickly, use little power and avoid activating by mistake when other sounds resemble it. DaVoice’s allegation concerns this listening layer, which can be valuable even though users may notice it only when it fails.

Why this is a trade-secret case

The suit is framed as a trade-secret dispute, not just a question of whether someone copied protected code. Copyright protects expression; trade-secret claims can also cover confidential technical methods and know-how. The distinction puts the focus on what information DaVoice disclosed, how it was protected and whether Perplexity used it improperly.

The complaint is heavily redacted, so the technical details of the alleged misuse are not public. That limits how much can be judged about DaVoice’s central accusation. For now, the filing sets out a trade-secret claim against Perplexity, not a finding that Perplexity used DaVoice’s technology.