The prompt is simple: a question about a recipe. The interface is a chat window, nestled in the corner of a lifestyle publisher's site. But the entity on the other side isn't a generic chatbot. It’s a Brand Agent, as Firsthand calls it, and its entire purpose is to keep you on the page, engaged, clicking deeper into the archive. It knows the publisher's voice, its content library, its sponsored partners. It is, in essence, the site itself, made conversational. This is the quiet, persistent interaction Firsthand is betting will define the next era of consumer engagement online.
Founded in 2023, Firsthand is an AI agent platform built specifically for brands and publishers to deploy these consumer-facing agents on their own digital properties [Firsthand, retrieved 2025]. The New York-based company, led by ad-tech veterans Jonathan Heller and Michael Rubenstein, recently closed a $26 million Series A led by Radical Ventures, bringing its total disclosed funding to $32.6 million [Axios, March 2025]. The premise is a shift in perspective: moving AI from a back-office efficiency tool to a front-line channel for conversation, content discovery, and, ultimately, monetization.
The Ad-Tech Veterans’ Pivot
The founding team reads like a who's who of digital advertising infrastructure. Co-CEO Jonathan Heller co-founded FreeWheel, the video ad platform acquired by Comcast, and later served as chief product officer for Comcast’s advanced advertising unit [Firsthand, retrieved 2025]. His counterpart, Michael Rubenstein, was president of AppNexus and previously worked with Heller at DoubleClick, where he founded the DoubleClick Advertising Exchange [AdExchanger, retrieved 2026]. CTO Wei Wei rounds out the trio, having led engineering at FreeWheel [Firsthand, retrieved 2025].
This collective history is not incidental. It is the core of Firsthand's wedge. These are operators who spent decades building the pipes and platforms that automated the buying and selling of digital ad impressions. Their new bet is that the next layer of infrastructure won't be about serving ads, but about serving adaptive, AI-driven experiences that make the ad,or the subscription, or the product placement,feel native to the conversation.
| Founder | Role | Key Prior Experience |
|---|---|---|
| Jonathan Heller | Co-CEO, Chairman | Co-founded FreeWheel (acquired by Comcast), CPO of Comcast Advanced Advertising [Firsthand, retrieved 2025] |
| Michael Rubenstein | Co-CEO, Board Director | President of AppNexus, founder of DoubleClick Ad Exchange (AdX) [Brand Innovators, retrieved 2026] |
| Wei Wei | CTO, Board Director | Led engineering at FreeWheel [Firsthand, retrieved 2025] |
From Infrastructure to Interaction
Firsthand’s platform is designed to let a media company or a brand launch a customized AI agent in a matter of weeks, without requiring in-house AI expertise [Firsthand, retrieved 2026]. The agent is trained on the company's own content and brand guidelines, and is deployed to interact directly with consumers. The use cases are pointed: a travel publisher's agent could help plan a trip based on archived articles; a beauty brand's agent could offer personalized skincare routines and product recommendations.
The commercial model appears to be twofold. First, as a software platform serving enterprise clients. Second, and more intriguingly, as a new ad product. Firsthand has suggested its Brand Agents can create new revenue streams by serving as an AI-powered ad surface, increasing engagement by “surfacing the most relevant content to readers and keeping them immersed in high-value media experiences” [FirstMark, retrieved 2026]. In this vision, the agent doesn't just answer questions,it curates a monetizable journey.
The company's hiring posture signals a serious push toward commercialization. Recent job postings list roles like Director of Customer Success and Director of GTM Strategy & Operations, with compensation bands indicating a focus on senior, enterprise-ready talent [Wellfound, retrieved 2025]. A separate analysis of public postings showed a median salary offer around $151,000 [Recruiting From Scratch, retrieved 2026].
The Unproven Conversation
The ambition is clear, but the path is lined with questions familiar to any new interaction paradigm. Firsthand has stated its customer base includes leading global publishers, agencies, and brands, but has not named them publicly in available reporting [Axios, March 2025]. The success of the bet hinges on a few critical, unproven motions.
- Consumer adoption. Will users genuinely prefer to chat with a brand agent over scrolling a feed or using a search bar? The habit is nascent, and the value must be immediately obvious.
- Brand trust. The platform promises clients “full control over their data and content” [Radical Ventures, retrieved 2026]. Convincing cautious publishers to let an AI model loose on their archive and their customer interactions is a significant trust sale.
- Monetization clarity. While the concept of an “AI-powered ad product” is compelling, its implementation,how it’s measured, priced, and integrated into existing media sales workflows,remains to be built and sold.
The competitive landscape is also amorphous. Firsthand isn't competing with other AI agent platforms so much as it's competing with inertia, with existing site navigation, and with the pervasive skepticism that any branded chatbot is anything but a clumsy FAQ bot in a nicer font.
The Next Twelve Months
The $26 million Series A provides a substantial runway to answer these questions. The capital will likely fuel the expansion hinted at by the open leadership roles, focusing on proving the model with early lighthouse customers. The key milestone to watch for is the first public case study: a named publisher or brand detailing measurable outcomes in engagement, retention, or revenue linked directly to their Firsthand agent.
The founders' deep relationships in media and advertising give them a formidable entry point. They are not selling AI to the CIO; they are selling a new kind of customer experience to the CRO and the head of digital media, people they've likely known for years. This distribution advantage is real, but it only gets you the first meeting. The product must then deliver a conversation good enough to justify changing a website's fundamental interface.
At its heart, Firsthand is answering a cultural question that has simmered since the first brand joined social media: What does it mean for a corporation to have a personality? For years, the answer was a managed Twitter account with a slightly cheeky tone. Firsthand’s answer is more profound,a persistent, intelligent, and useful entity that lives on your site, embodying the brand not through tweets, but through countless, small, helpful dialogues. It is betting that in the AI era, a brand's voice won't be something it projects outwards, but something it talks with.
Sources
- [Axios, March 2025] Exclusive: Firsthand raises $26M for brand agents | https://www.axios.com/2025/03/04/firsthand-brand-agents
- [Firsthand, retrieved 2025] Firsthand launch announcement | https://www.firsthand.ai/news/firsthand-launch
- [Firsthand, retrieved 2025] Company about page | https://www.firsthand.ai/about
- [AdExchanger, retrieved 2026] Michael Rubenstein profile | https://www.adexchanger.com/ai/meet-the-ai-startup-founded-by-ad-tech-vets-that-wants-to-replace-ads-with-adaptive-experiences/
- [Brand Innovators, retrieved 2026] Michael Rubenstein background | https://www.brandinnovators.com/news/michael-rubenstein-joins-firsthand-as-co-ceo
- [FirstMark, retrieved 2026] Firsthand investment thesis | https://www.firstmark.com/portfolio/firsthand
- [Radical Ventures, retrieved 2026] Firsthand portfolio page | https://www.radical.vc/portfolio/firsthand
- [Wellfound, retrieved 2025] Firsthand job postings | https://wellfound.com/company/firsthand-labs
- [Recruiting From Scratch, retrieved 2026] Firsthand salary analysis | https://www.recruitingfromscratch.com/company/firsthand-labs