Teso LT, UAB

Teso LT, UAB is a private Lithuanian technology company founded in 2008 and headquartered in Vilnius. It operates within the IT services industry, focusing on areas such as digital transformation, cloud computing, and security. The company is an integral part of the Tesonet technology group, a venture builder and investor in cybersecurity, AI, web intelligence, and other tech verticals. Teso LT, UAB itself is noted to have between 11 and 50 employees.

Teso LT, UAB is closely associated with Oxylabs, a company that provides web intelligence and data acquisition services, including residential proxy solutions. The broader Tesonet ecosystem builds and scales various products and companies within its focus areas.

In terms of patent litigation, Teso LT, UAB is an operating company that has been a defendant in patent infringement suits. The company's sole tracked case shows it as a defendant and not as a plaintiff, indicating a posture of defending against assertions rather than initiating them. The litigation has primarily taken place in U.S. federal courts, including the U.S. District Court for the Eastern District of Texas, a venue known for patent litigation.

The most prominent case involving Teso LT, UAB is Bright Data, Ltd. v. Teso LT, UAB et al. (Case No. 2:19-cv-395), filed in the Eastern District of Texas. In this case, Bright Data alleged that Teso LT, UAB, along with co-defendants Oxysales, UAB, and Metacluster LT, UAB (collectively operating as Oxylabs), willfully infringed its patents related to residential proxy solutions. A federal jury found that Oxylabs had willfully infringed Bright Data's patent rights. Additionally, Teso LT, UAB and co-defendants successfully defended against an appeal by Bright Data regarding the unpatentability of a patent covering data communication systems, with the Federal Circuit affirming the unpatentability finding on August 1, 2025.