Multiply raises $9.5M to build the first hybrid AI media agency for B2B advertisers
Mar 18, 2026 with Matt Jayson
Key Points
- Multiply emerges from stealth with $9.5M led by Sourcing Capital, backed by Instacart co-founder Max Mullen and Josh Woodward, who leads Gemini at Google.
- The hybrid AI media agency uses proprietary customer data—sales calls, emails, support conversations—to generate hundreds of ad variations, claiming 300–500% growth on ad channels for clients like Vanta and Superhuman.
- Multiply's competitive edge is access to business-specific signals unavailable on the open web, allowing AI agents to obsessively test messaging variants informed by why actual customers buy rather than generic playbooks.
Summary
Multiply emerged from stealth with a $9.5M funding round led by Sourcing Capital. Instacart co-founder Max Mullen and Josh Woodward, who leads Gemini at Google, also invested.
Multiply positions itself as a hybrid AI media agency for B2B advertisers, combining AI agents with human media buyers. The company targets a structural problem in advertising: creative staleness. B2B ads go stale in two to three days as audiences tune out, forcing constant creative refreshes.
Multiply ingests proprietary customer data—sales call recordings, customer emails, support conversations—to dynamically generate hundreds of ad variations that reflect why actual customers buy. The AI agents pull signals from sales conversations and customer feedback, then continuously test and iterate on messaging. Companies like Vanta, Listen Labs, Superhuman, and PowerMode already use the product and report 300–500% growth on ad channels by moving from static to self-learning ads.
Founder Matt Jayson describes the agents as "insatiable," running hundreds of experiments per week. The bet is that obsessive testing across variants reveals what actually resonates with a specific customer segment or cohort. Financial services companies receive different messaging than manufacturing customers with certain revenue profiles, informed by CRM data and customer intent signals.
The competitive advantage rests on proprietary data. Unlike generic LLM providers that generate taglines, Multiply's agents access business-specific signals unavailable on the open web—why a particular buyer loved a particular product—then amplify that insight into media strategy. The unit economics appear compelling enough that B2B SaaS and services companies are actively requesting more personalized, dynamic approaches.