Overview
FirstMark is an early-stage venture capital firm in New York City[1] that backs enterprise, consumer and frontier tech founders[2]. Founded in 2008[8], the firm provides support services to startup founders including access to networks, customers and top talent through expert communities, customer introductions, exclusive summits and full lifecycle recruiting[7]. FirstMark's team consists of 25 people, including Founder & Partner Rick Heitzmann and Amish Jani[9]. The firm's portfolio includes companies such as Pinterest, Shopify, Discord, DraftKings, Vercel, ClickHouse, Dataiku, Synthesia, Ro, Function Health, Legora and Harmattan AI[10]. In July 2026, FirstMark participated in New York AI funding rounds including Henry AI's $16.5 million seed round and Overtone's $18 million round[3].
Org chart
P2 alumniInvestments
Vendelux
New York company using AI and event data to help B2B marketers choose and measure conferences.
Daytona
An infrastructure platform for secure, scalable execution of AI-generated code in isolated sandboxes with programmatic control for developers and AI systems
Overtone
Overtone, a modern matchmaking company that uses AI and voice technology to provide highly curated romantic introductions grounded in relationship science
Henry
Automating Deal Decks for Commercial Real Estate Brokers
TensorZero
New York-based AI company building an open-source stack (gateway, observability, evaluations and optimization) for industrial-grade LLM applications.
In the news
- The 7 Largest NYC Tech Startup Funding Rounds of August 2026Eight NYC startups. One $116M raise. August 2026's largest funding rounds span healthcare, AI, fintech, and robotics. Which companies made the list?
AlleyWatch · Sep 10, 2026
- The Weekly Notable Startup Funding Report: 8/24/26The notable startup funding rounds for the week ending 8/22/26 featuring funding details for Palona AI, Rundoo, Also, and thirty other deals representing $3.9B in new funding that you need to know about.
Traction
- FirstMark's homepage names portfolio companies including Pinterest, Shopify, Discord, DraftKings, Vercel, ClickHouse, Dataiku, Synthesia, Ro, Function Health, Legora and Harmattan AI.[10]
NYC headquarters
- The company's own site places it in New York: Text explicitly states 'FirstMark is an early-stage venture capital firm in New York City' multiple times throughout the page..[6]
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