Sumble Launches From Stealth With $38.5M Funding to Deliver AI-Powered Context for Sales Intelligence

Sumble, a San Francisco startup founded by former Kaggle leaders Anthony Goldbloom and Ben Hamner, emerged from stealth with $38.5 million in seed and Series A financing. The company uses a knowledge graph backed by large language models to pull public data from the web and deliver contextual sales intelligence, including technographic details, organizational charts, and project insights. Since its April launch, Sumble has signed 19 enterprise customers such as Snowflake, Figma, Wiz, Vercel and Elastic, with roughly 30% of users on a paid Pro plan. Growth has been driven by word‑of‑mouth adoption inside organizations, and the startup now faces competition from established sales‑intelligence vendors.

Background

Sumble was founded by Anthony Goldbloom and Ben Hamner, the co‑founders of the data‑science community Kaggle. The duo identified a gap in the crowded sales‑intelligence market: while many services provide raw data about prospects, sales teams also need contextual insight that ties together disparate information. To address this, Sumble set out to aggregate public data from sources such as social media, job boards, company websites and regulatory filings.

Product and Technology

The core of Sumble’s offering is a knowledge graph that maps relationships among companies, technologies, projects and people. Large language models (LLMs) power the graph’s queryability, allowing users to ask natural‑language questions and receive grounded answers. The platform is available as a web app and via an API, with a paid tier that adds workflow integrations, CRM connections and real‑time notifications about prospect developments.

Customer Traction

Since launching in April, Sumble has secured 19 enterprise customers, including high‑profile firms like Snowflake, Figma, Wiz, Vercel and Elastic. Tens of thousands of users have signed up, and about 30% of them—or their companies—pay for the Pro subscription. Growth has been largely organic: the product often spreads virally within a single Slack channel, then expands to entire teams, offices and whole organizations.

Funding and Investors

Sumble announced a total financing round of $38.5 million. Coatue led an $8.5 million seed investment, while Canaan Partners led a $30 million Series A. Additional participants included AIX Ventures, Square Peg, Bloomberg Beta, Zetta and a group of angels such as Salesforce CEO Marc Benioff and former GitHub CEO Nat Friedman. The founders’ prior relationships helped attract investors familiar with Kaggle’s history.

Competitive Landscape

The startup enters a market populated by incumbents and niche players such as Apollo.io, Slintel, SalesLoft, Cognism, Reply.io, ZoomInfo, HubSpot and Outreach. Many of these competitors offer point solutions or all‑in‑one sales toolkits. Sumble differentiates itself by leveraging a richly structured knowledge graph that currently covers about 2.6 million companies worldwide, a scale the founders argue provides a defensible moat.

Future Outlook

Goldbloom believes that the continued rise of LLMs will amplify Sumble’s value, as the knowledge graph can feed contextual data directly into AI models. The company plans to expand its data coverage, refine its AI integration and deepen enterprise adoption through additional integrations and feature enhancements. While the market remains competitive, Sumble’s blend of AI‑driven context and viral growth dynamics positions it for further momentum.