HumanSignal Tech Stack

Data labeling and annotation platform for building proprietary AI models

Software Development San Francisco, California 51–200 employees Founded 2019 Privately Held

HumanSignal operates a two-sided data platform: Label Studio, an open-source labeling tool with 250,000+ users, and a commercial services layer (Label Studio Enterprise plus managed data collection). Hiring is heavily weighted toward data and sales roles, with minimal engineering headcount—indicating a services-first scaling model rather than product-driven growth. Active projects include managed data collection facilities and enterprise onboarding, suggesting the company is moving up-market from open-source adoption into managed workflows and white-glove services.

Tech Stack 12 technologies

Core StackSalesforce React TypeScript Python Django AWS Vercel Label Studio iOS iPhone Notion CI/CD

What HumanSignal Is Building

◆Challenges

Remove data bottlenecks
Lack of high-quality labeled data
Ai model performance
Purpose-built datasets manufactured from scratch
Scaling for hyper-growth
Streamlining cross-functional delivery
Scaling data labeling pipelines
High-quality image data collection
Complex sales cycles
Scalable ai data pipelines

▲Active Projects

Image data collection for ai training
Data creation laboratories
Sell label studio platform
Ai pipelines
Columbus data collection facility
Rating graphic design elements for ai training
Sell data creation laboratory services
Label studio enterprise
Knowledge management in notion
Technical onboarding for enterprise customers

Hiring Activity

Decelerating65 roles · 9 in 30d

Department

Data

Sales

Ops

Engineering

Design

Operations

Research

Support

Seniority

Junior

Senior

Mid

Lead

Manager

Intern

Director

Notable leadership hires: Operations Lead

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About HumanSignal

HumanSignal provides data labeling, annotation, and dataset creation services for machine learning and generative AI teams. The core product, Label Studio, is an open-source platform used by 250,000+ practitioners who have collectively annotated over 100 million data points. The company also operates Label Studio Enterprise as a managed cloud service and runs data collection facilities to manufacture high-quality training datasets from scratch. Customers include mid-market and enterprise data science organizations building proprietary foundation models and fine-tuning workflows. The company is headquartered in San Francisco and operates globally across 23+ countries.

HeadquartersSan Francisco, California

Company Size51–200 employees

Founded2019

Hiring MarketsUnited States, Brazil, Switzerland, Colombia, United Kingdom, Thailand, Italy, Czechia

Frequently Asked Questions

What is Label Studio and who uses it?

Label Studio is an open-source data labeling platform with 250,000+ users who have annotated over 100 million data points. HumanSignal also offers Label Studio Enterprise, a managed cloud version used by data teams at companies including Bombora, Geberit, Outreach, Wyze, and Zendesk.

What does HumanSignal's tech stack look like?

The core stack includes Label Studio (proprietary), React, TypeScript, Python, Django, AWS, and Vercel. The company uses Salesforce for CRM, Notion for knowledge management, and standard CI/CD infrastructure.