We're on a mission to help data scientists use data to teach ML/AI models how to make the best predictions. HumanSignal (formerly Heartex) is the team behind Label Studio, the world's most popular open source data labeling platform with over 250,000 users. We believe that building AI systems that actually work requires real human oversight - people giving meaning to data in ways that models can learn from. That's why we built tools that let teams configure every aspect of the annotation process, capture nuanced human decisions, and scale operations with automation.
Our founding team came together after summiting Stok Kangri in the Himalayas - yes, we were talking about data science at 20,187 feet. Since starting in 2019, we've raised $30M from investors like Redpoint Ventures and Unusual Ventures, and we've helped teams at Zendesk, Outreach, Trivago, and many others build better AI. We're remote-first with people across North America, Europe, and South America. We're growing fast, but we're staying focused on the same thing: making it possible for any organization to turn their raw data into something AI systems can actually learn from.
