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Zefr is a global technology company specializing in contextual intelligence for brand safety and suitability in digital video advertising. Leveraging patented Human-in-the-Loop AI technology, Zefr provides brands and agencies with precise content targeting and measurement solutions across major platforms such as YouTube, Meta (Facebook & Instagram), and TikTok. Their technology helps advertisers ensure their campaigns run alongside content that aligns with their brand values, enhancing media effectiveness and protecting brand reputation in complex digital environments. Zefr aims to empower responsible marketing and create a more transparent and brand-safe video ecosystem.
The Venice headquarters serves as the primary center for Zefr's executive leadership, core technology development, product innovation, engineering, global sales strategy, marketing, and corporate operations.
Located in a modern office space reflecting the creative and tech-forward spirit of Venice. The office likely features open-plan designs, collaborative workspaces, and amenities conducive to innovation and employee well-being.
Zefr's HQ is known for a dynamic, innovative, and collaborative work culture. It blends the fast-paced nature of a tech company with the more laid-back, creative atmosphere characteristic of Venice Beach, encouraging employee engagement and a focus on cutting-edge solutions.
The Venice headquarters is pivotal as it's where Zefr's foundational technology was conceived and continues to evolve. Its location within Silicon Beach provides access to a rich talent pool, industry partnerships, and venture capital, crucial for its growth in the ad-tech sector.
Zefr supports its global clientele and platform partnerships through strategically located offices and teams across North America (including Los Angeles, New York, Chicago, Toronto), Europe (London, Paris, Berlin), Asia-Pacific (Sydney, Singapore, Tokyo), and Latin America (São Paulo). This international presence allows Zefr to offer localized sales, client support, and market-specific insights, ensuring their AI-driven brand safety and contextual targeting solutions are effectively implemented worldwide.
3100 Abbot Kinney Blvd, Suite 200
Venice
CA
USA
Address: 75 Varick St, New York, NY 10013, USA
To strengthen Zefr's presence in the North American East Coast advertising market, providing localized support and strategic partnerships.
Address: The Binary, 10 St Mary at Hill, London EC3R 8EE, UK
To drive Zefr's growth in the European and EMEA markets, tailoring solutions to regional advertising standards, languages, and regulatory environments.
Address: 222 W Merchandise Mart Plaza, Suite 1212, Chicago, IL 60654, USA
To provide dedicated support and expand Zefr's footprint within the key Midwest advertising ecosystem.
Address: Level 10, 5 Martin Place, Sydney, NSW 2000, Australia
To lead Zefr's expansion and service delivery in the APAC region, offering localized expertise in brand safety and suitability.
Highperformr Signals uncover buying intent and give you clear insights to target the right accounts at the right time — helping your sales, marketing, and GTM teams close more deals, faster.
As of April 2025, Zefr' leadership includes:
Zefr has been backed by several prominent investors over the years, including:
Zefr has made strategic appointments to its leadership and board to support its growth and market expansion. In the last 12 months, there has been 1 notable new hire to the executive team and 1 significant board appointment. No major executive departures have been publicly announced.
Discover the tools Zefr uses. Highperformr reveals the technologies powering your target accounts — helping your sales, marketing, and GTM teams prioritize smarter and close faster.
Zefr commonly utilizes the [first_initial][last]@zefr.com email format (e.g., jsmith@zefr.com). Another possible format, though less common, could be [first].[last]@zefr.com (e.g., john.smith@zefr.com).
[first_initial][last]@zefr.com
Format
rjames@zefr.com
Example
90%
Success rate
Zefr Blog • March 12, 2024
Zefr announced expanded brand suitability controls for advertisers on YouTube Shorts through Google's Video Partners program. This enhancement allows brands to apply Zefr's GARM-aligned suitability mapping for their YouTube Shorts inventory, providing more granular control over ad placements....more
Business Wire • January 24, 2024
Zefr announced that its contextual data solutions for platforms like Meta, TikTok, and YouTube are now available via AWS Data Exchange. This allows customers to easily access and integrate Zefr's data for enhanced targeting and brand safety analytics within their AWS environment....more
Zefr Blog • December 5, 2023
Zefr announced it received accreditation from the Media Rating Council (MRC) for its brand safety and suitability reporting on YouTube. This accreditation covers content-level analysis and reporting of brand safety and suitability for YouTube video campaigns....more
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