Upstream, a privately owned company headquartered in the United Kingdom, was founded in 2001, employs approximately 460 individuals, and reported $54.8M in revenue as of 2023. The company specializes in software development, functioning as a mobile technology provider.
On July 30, 2026, Upstream highlighted shifts in the mobile telecommunications ecosystem as the web moves towards a more secure environment, offering solutions for mobile operators to maintain subscriber identification capabilities ahead of Google Chrome's HTTPS-first browsing enforcement by October 2026. This development addresses Google’s HTTPS-first mandate, which is reshaping mobile subscriber identity and impacting operators' traditional reliance on Header Enrichment for authentication, single sign-on, age verification, and billing. Previously, on July 11, 2025, Intersel, a global investor with expertise in the telecom sector, acquired Upstream. Following the acquisition, Salim Khoury was appointed Executive Chairman.
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