The AI Patent Wars: Krisp's Stand Challenges the Rules of Innovation

SAN FRANCISCO, CA – September 08, 2026 – In the rarefied air of Silicon Valley, where algorithms are assets and code is capital, the line between inspiration and infringement is a fiercely contested battleground. The latest skirmish in the burgeoning artificial intelligence sector has just seen a dramatic turn. The U.S. Patent and Trademark Office (USPTO) has delivered a significant, if preliminary, victory to Voice AI leader Krisp in its high-stakes patent dispute with competitor Sanas, agreeing to review the validity of all six patents Sanas has asserted against the company. The decision doesn't just alter the legal calculus for the two firms; it sends a tremor through the entire tech industry, forcing a hard look at how we define and defend innovation in the age of AI.

A Decisive Move from the Patent Office

At the heart of the matter are six patents held by Sanas, a company specializing in real-time accent conversion. Sanas accused Krisp of infringement in a lawsuit filed in July 2025, setting off a complex legal battle. Krisp, a company whose noise-cancellation and voice-enhancement technology is deployed on over 200 million devices worldwide, responded not just with a denial but with a forceful counter-offensive. It filed petitions with the USPTO to challenge the very legitimacy of Sanas's patents.

That strategy has now paid off. The USPTO's Patent Trial and Appeal Board (PTAB) has instituted proceedings on all six of Krisp's challenges—four inter partes reviews (IPRs) and two post-grant reviews (PGRs). This is not a mere procedural step. For the PTAB to institute a trial, it must first determine that the challenger has demonstrated a “reasonable likelihood” of prevailing. In essence, the patent office has reviewed the evidence and concluded that it is “more likely than not” that Sanas’s patents are invalid.

“We are very pleased with the USPTO’s decisions to institute all six proceedings,” said Davit Baghdasaryan, CEO and Co-Founder of Krisp, in a statement. “Sanas chose to assert these patents against Krisp, and we responded by challenging all six before the USPTO. The USPTO has now reviewed those challenges on the merits and determined that each one is likely to be successful.”

This clean sweep is particularly noteworthy. According to legal analysts, recent policy shifts at the USPTO have made it more difficult to get such reviews instituted, with approval rates dropping significantly in the last year. For Krisp to succeed on all six petitions against this tougher backdrop suggests the arguments against the patents are exceptionally strong.

The Anatomy of a Tech Dispute

The conflict between Krisp and Sanas is a textbook example of modern tech litigation, fought simultaneously across multiple fronts. Sanas’s initial lawsuit in federal court accused Krisp not only of patent infringement but also of trade secret misappropriation. Krisp fired back with a countersuit, alleging Sanas was infringing on its own patents and engaging in unfair competition by offering free software to lure away its customers.

While the district court case continues, the PTAB proceedings operate on a separate, more specialized track. The court case deals with whether infringement occurred, but the PTAB’s job is to re-examine whether the USPTO should have granted the patents in the first place. The patents in question cover technologies at the core of the voice AI revolution, including accent translation, neural network-based voice enhancement, and real-time accent correction.

Earlier this year, a federal judge denied Krisp’s motion to dismiss the case on the grounds that the patents covered ineligible abstract ideas, allowing Sanas's suit to proceed. However, that ruling was on a different legal standard. The PTAB's decision to institute trials now suggests that even if the patents describe a patent-eligible type of invention, the specific claims may not be novel or non-obvious when compared to pre-existing technology, or “prior art.” This distinction is crucial; it’s the gap where many patent battles are won and lost.

A Test Case for Innovation or Litigation?

This dispute has become a flashpoint for a larger debate about the role of intellectual property in the fast-moving AI industry. Is the patent system a shield for true innovators, or has it become a sword for those who would rather litigate than innovate? Krisp has consistently maintained that its award-winning technologies, which process over 80 billion minutes of conversations monthly, were “independently developed through years of proprietary research and engineering.” The PTAB’s decision lends significant weight to that narrative.

Legal experts who follow patent litigation note that once the PTAB institutes a trial, the odds shift dramatically against the patent owner. Historical data shows that a high percentage—often over 70%—of challenged patent claims that go to a final written decision are ultimately invalidated. “Getting all your petitions instituted is a major strategic victory,” commented one patent attorney not affiliated with the case. “It puts immense pressure on the patent holder and validates the challenger’s core argument that the patents are weak.”

For the broader AI ecosystem, the case serves as a critical test. As AI models become more complex, the ideas behind them can feel abstract, making them difficult to patent and defend without ensnaring a wide swath of unrelated, independently developed technology. If Sanas’s patents are ultimately invalidated, it could embolden other companies to fight back against what they perceive as overly broad or low-quality patents, potentially curbing the rise of “patent trolls” in the AI space and ensuring the field remains open to competition and genuine technological advancement.

Beyond the Courtroom: The Battle for the Voice AI Market

While lawyers trade blows in court filings and administrative hearings, the real prize is dominance in the rapidly expanding market for voice AI. This is not a dispute between two garage-based startups. Krisp, founded in 2017, is an established leader, recognized by Forbes, TIME, and Gartner for its innovations. Its success is built on a massive user base and a reputation for enterprise-grade security and privacy—a key differentiator in a world wary of Big Tech’s prying ears.

Sanas, while also an innovator in the space, has taken a more aggressive legal posture to protect its claimed territory. While the company has not issued a public comment on the PTAB’s latest decisions, it previously hailed the district court’s refusal to dismiss its case as a major win, stating, “What we build is ours. Innovation is in our DNA.”

Now, with the validity of its foundational patents under a cloud of doubt, that DNA is being rigorously examined. The PTAB trials, expected to conclude within a year, will offer a definitive answer on the six patents in question. The outcome will not only shape the futures of Krisp and Sanas but will also help write the rules for the next chapter of technological innovation.