AI Data and Evaluation Platform Datumo Raises $15.5 Million to Take on Scale AI

Datumo, a Seoul-based AI data and LLM evaluation platform led by Yuntaek Lee, Haseung Jeon, Michael Hwang, Seyeob David Kim, and Munhwi Jeon, has raised $15.5 million, which brings its total raised to approximately $28 million, from investors including Salesforce Ventures, KB Investment, ACVC Partners, and SBI Investment, among others. The funding will accelerate R&D on automated AI evaluation tools and support global expansion across South Korea, Japan, and the U.S. With 150 employees in Seoul, Datumo also opened a Silicon Valley office in March to deepen its international presence, as reported in TechCrunch.

Datumo, a 7-year-old startup, began as a data labeling provider but evolved in response to client demand. In its first year, it surpassed $1 million in revenue and landed contracts with major Korean firms. Today, it serves over 300 clients—including Samsung, LG, Hyundai, SK Telecom, and Naver—and generated around $6 million in revenue in 2024, reflecting its growing role in South Korea’s AI ecosystem.

Datumo blends elements of Scale AI’s pretraining data services with the evaluation and monitoring focus of companies like Galileo and Arize AI. What sets it apart is its use of licensed datasets, including complex, high-reasoning content from published books, as well as its full-stack evaluation platform, Datumo Eval. This no-code tool is built for non-developers in policy, trust & safety, and compliance roles, automating test data generation and safety checks without manual scripting.