UK100 Start-Ups: SegmentStream
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This article is part of The UK100 Start-Ups, a special edition by Entrepreneur UK showcasing the most exciting startups redefining business in 2026. From climate and health to AI and creativity, these innovators are tackling big challenges—while racing to scale, secure funding, and attract top talent.
SegmentStream is an AI-powered Marketing Intelligence Platform reinventing marketing analytics for the AI era. The start-up uses Agentic AI to help digital marketers measure and optimize cross-channel ad investment with full automation. Unlike traditional tools, SegmentStream predicts future results and automatically implements optimization actions across ad platforms, closing the gap between analytics and execution. The startup has raised $2.7m in Seed funding and was recently selected as one of the Top 3 start-ups at the 2025 Web Summit Pitch Competition out of more than 2,700 companies.
This article is part of The UK100 Start-Ups, a special edition by Entrepreneur UK showcasing the most exciting startups redefining business in 2026. From climate and health to AI and creativity, these innovators are tackling big challenges—while racing to scale, secure funding, and attract top talent.
SegmentStream is an AI-powered Marketing Intelligence Platform reinventing marketing analytics for the AI era. The start-up uses Agentic AI to help digital marketers measure and optimize cross-channel ad investment with full automation. Unlike traditional tools, SegmentStream predicts future results and automatically implements optimization actions across ad platforms, closing the gap between analytics and execution. The startup has raised $2.7m in Seed funding and was recently selected as one of the Top 3 start-ups at the 2025 Web Summit Pitch Competition out of more than 2,700 companies.
