HumanSignal is a data labeling and annotation platform that helps machine learning teams prepare training data at scale. Founded in 2018 by Sergey Yurchenko and Alexander Lapshin, the company provides both open source and commercial solutions for data labeling workflows. Based in San Francisco with roughly 50-200 employees, HumanSignal serves AI and ML teams across industries who need efficient, scalable ways to annotate images, text, audio, and video. The company is best known for Label Studio, its widely-adopted open source data labeling tool, which powers both individual projects and enterprise deployments. HumanSignal helps organizations reduce time-to-model by providing infrastructure and tooling that democratizes access to professional-grade data annotation capabilities, positioning itself at a critical stage of the AI/ML development pipeline.
HumanSignal maintains a strong connection to its open source roots while building a commercial platform, reflected in a developer-first, collaborative culture. The team is mission-driven around removing barriers to ML data preparation and attracts engineers who value both technical rigor and community impact. As a growth-stage venture-backed startup, the company operates with startup pace and flexibility, offering hybrid work arrangements that reflect modern tech industry norms. The culture emphasizes transparency, technical depth, and pragmatism in solving the unglamorous but essential problem of data quality in machine learning.
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