Microsoft settles Cerence TTS suit: track your license end dates

Microsoft and its Nuance subsidiary have agreed in principle to settle a text-to-speech copyright suit brought by Cerence. The claim at the center of it is plain: the license expired, and the software kept running. If a company with Microsoft's legal team can end up in federal court over a lapsed software license, a small business with a dozen SDKs and API contracts can too.

What actually happened

Cerence spun out of Nuance in 2019 and holds the intellectual property for the text-to-speech technology. Nuance had a license to use it. Microsoft bought Nuance in 2022. According to Cerence's complaint, as Bloomberg Law reported in June, the license expired in 2024, was not renewed, and Microsoft kept licensing the software anyway. Cerence sued for copyright infringement and breach of contract in Delaware federal court in May 2025.

In June 2026, the judge put the case on hold until the US Copyright Office weighed in on the ownership questions. This week, Bloomberg Law reports, the parties told the court in a joint status report that they have an agreement in principle to settle. They expect to finalize it within 30 to 45 days and asked for a 60-day deadline. The terms were not disclosed.

Microsoft did not admit anything, and we don't know what it paid. What we know is that the dispute ran for more than a year.

Why software license end dates matter for your business

Expired licenses don't stop working. A lapsed SaaS subscription locks you out. A lapsed SDK, voice model, font, or embedded library usually keeps running in your build. Nothing breaks, so nobody notices. The owner notices.

Acquisitions break license chains. This case started when a licensee changed hands. If you buy a business, or a vendor you rely on gets bought, the licenses don't always transfer. Read the assignment and change-of-control clauses before the deal closes, not after.

Voice and AI components are the new risk. Teams now ship TTS voices, speech models, and model weights inside products, often from a quick trial or a one-year deal. Each one has an end date and a scope. Make a license inventory: component, owner, terms, renewal date, and where it runs in production. Put renewals on a calendar with 90 days' notice. When a license ends, remove the component or renew it. Don't let it drift.

Sources: Bloomberg Law (October 2026), Bloomberg Law (June 2026), Cerence press release.