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Qortex

Founded 2020 · 25 employees on LinkedIn · 3 known investors

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On-Stream is a video advertising platform that enables publishers to monetize video content through scalable in-video ad units. The product supports quick integration with programmatic and direct demand sources without requiring code changes.

Founders & leadership

Qortex was founded in 2020 by Zack Rosenberg.

ZRZack Rosenberg
Zack RosenbergCo-Founder and CEOWith over 15 years of experience in online media, digital marketing, and video AI, he has previously worked on ad targeting, media quality scoring, and video advertising solutions.

Investors · 3

Funding

SEC filings, press & company announcements

Source: company announcements and press reports — follow each round's link for the claim.

Company profile

researched Aug 2026

Qortex operates a video intelligence platform that analyzes video content at the frame level to build content-based audience insights and advertising segments. The platform produces three primary outputs: a "Resonance" score that quantifies how closely a piece of content aligns with a campaign's intent using natural language processing and computer vision models trained to detect tone, themes, sentiment, pacing and emotional context; a "Premium Rating" that evaluates the quality and suitability of a video environment using IAB content taxonomy, brand suitability standards and custom brand filters, accounting for factors such as production quality, topic alignment and contextual risk; and "Inferred Audiences," which groups audiences by shared interests based on aggregated video-level behavior, content themes and overlapping topic clusters rather than user IDs or personal identifiers.

Curated video segments are made available across connected TV, YouTube and other video environments, and can be activated in any demand-side platform via Deal ID, which the company positions as requiring no new integrations or changes to existing buying workflows. An accompanying analytics layer links creative, content and audience signals to campaign outcomes, intended to show which content and moments attracted new audiences and where reach expanded, for use in optimizing subsequent media buys.

Business model

Qortex supplies video-intelligence-derived audience and content segments to advertisers and marketers, which are activated programmatically through demand-side platforms via Deal ID alongside an analytics reporting layer.

▸Full profile — market position, technology, go-to-market

Market position

Qortex builds segments from content signals rather than user identifiers or demographic data, positioning its approach as identifier-free and portable across any DSP or buying workflow without new integrations.

Technology

The platform applies natural language processing and computer vision models to individual video frames to detect tone, themes, sentiment, pacing and emotional context, combining these signals into a resonance score. Separate models assess environment quality and brand suitability against the IAB content taxonomy and custom brand filters, while audience segments are inferred from aggregated video-level behavior and topic clusters without user identifiers or personal data.

Go-to-market

Segments are distributed through existing programmatic infrastructure, available in any DSP via Deal ID so buyers do not need to adopt a new workflow.

Marketers, advertisers and media buyers purchasing video inventory across CTV, YouTube and other video platforms.

Compiled by commissioned research from 1 cited public sources — announcements, filings, and press listed under research sources below.

Key figures

latest reported
HeadcountAug 202625

Company-reported or press-reported figures, each dated to when it was claimed — not independently audited.

In the news

▸Research sources · 1

primary sources listed

1 public sources were cited for this profile; the first-party ones are listed here.

Frequently asked questions

What does Qortex do?
Qortex is a video intelligence platform that curates and activates content-based video ad segments across CTV, YouTube and other platforms.
Who founded Qortex?
Qortex was founded by Zack Rosenberg in 2020.
Who are Qortex's investors?
Qortex's investors include Boro Capital, GFT Ventures, Silicon Road Ventures.