HumanSignal

Creators of Label Studio, the most widely adopted open-source data labeling platform, helping teams build high-quality AI training datasets.

AI Training AI Data Labeling & Open Source
Visit HumanSignal
★ ★ ★ ★ ★ New (0 reviews)
San Francisco, USA HQ
11-50 company size
2019 founded

What is HumanSignal?

HumanSignal (formerly Heartex) is a technology company founded in 2019 and headquartered in San Francisco, focused on data-centric AI. The company created Label Studio, the most widely adopted open-source data labeling platform for AI/ML training data, with a community of hundreds of thousands of users. The platform supports annotation of text, audio, images, video, and time-series data, enabling teams to train, fine-tune, and validate AI and foundation models. HumanSignal's mission is to help enterprises embed their unique proprietary data and expert human judgment into AI models for more accurate, differentiated, and reliable systems. Beyond the open-source tool, the company offers Label Studio Enterprise with enhanced security (SOC2/HIPAA compliance), team collaboration, automation, and advanced quality control workflows. HumanSignal maintains a global community of data annotation contributors for labeling and evaluation projects.

Mission & values

Help every company become a data-centric AI company — through Label Studio (the leading open-source labeling platform) and the HumanSignal enterprise data engine.

Qualifications

For data annotation contributor roles: strong attention to detail, ability to follow precise instructions, and familiarity with or interest in AI technology. No specific degree required for annotation work. For internal engineering, data science, and project management roles: relevant technical background and experience expected. The company operates with a flexible, often hybrid working culture, with many contributor roles available remotely. Contributors review, refine, and label data to ensure accuracy and consistency for AI development.

Leadership

M

Michael Malyuk

Co-Founder & CEO

N

Nikolay Lyubimov

Co-Founder & CTO

M

Maxim Tkachenko

Co-Founder

J

Joe Alfaro

VP of Engineering

L

Lauren Sell

VP of Marketing & Ecosystem

B

Brandi Bergstrom

Head of Talent

Hiring process

  1. 1

    Apply on humansignal.com/careers

    Submit your application for an open role.

    About 1 day

  2. 2

    Recruiter call

    Discuss role, background, and compensation expectations.

    About 5 days

  3. 3

    Hiring manager interview

    Deep dive on responsibilities and your relevant experience.

    About 5 days

  4. 4

    Technical / on-site loop

    Multi-round technical interviews relevant to the role.

    About 10 days

  5. 5

    Offer

    Compensation and equity discussion, then written offer.

    About 3 days

Funding

StageSeries A
Total raised$30,000,000
Investors
Redpoint Ventures Unusual Ventures Bow Capital Swift Ventures

Awards & recognition

  • Creators of Label Studio — leading open-source data-labeling platform

    HumanSignal

  • Rebrand from Heartex to HumanSignal (June 2023)

    HumanSignal

Company information

Frequently asked questions

Is HumanSignal legitimate?
Yes, HumanSignal is a legitimate company listed on RemoWork. We verify all companies on our platform. However, we always recommend doing your own research before sharing personal information or starting work. Check reviews from other users and visit the company's official website for the most up-to-date information.
How do I get started with HumanSignal?
To get started, visit HumanSignal's official website and look for their careers or sign-up page. Create an account, complete your profile with relevant skills and experience, and apply for available positions or projects. Some companies may require you to pass a qualification test or assessment before you can start working.
Does HumanSignal offer remote work?
Yes, HumanSignal offers remote work opportunities. Most tasks and positions can be completed from anywhere with a reliable internet connection and a computer or smartphone. Specific location requirements may vary by project or role, so check individual listings for details.
How does HumanSignal pay its workers?
Payment methods and schedules vary. Common payment options include PayPal, bank transfers, Payoneer, and other digital payment platforms. Visit HumanSignal's official website or check their payment/FAQ section for specific details about payment methods, minimum thresholds, and payout schedules.
What skills do I need to work with HumanSignal?
Required skills vary by role and project. Generally, you'll need a reliable internet connection, basic computer literacy, strong attention to detail, and good communication skills. Some positions may require specialized expertise, language proficiency, or technical qualifications. Check individual job listings for specific requirements.
What is Label Studio?
Label Studio is the most widely adopted open-source data labeling platform for AI/ML, created by HumanSignal. It allows teams to annotate text, audio, images, video, and time-series data with customizable workflows. The open-source version is free on GitHub, while Label Studio Enterprise adds security (SOC2/HIPAA), team collaboration, and advanced quality control.
Does HumanSignal hire remote data annotators?
Yes, HumanSignal maintains a global community of data annotation contributors who work remotely on labeling and evaluation projects. These roles involve reviewing, refining, and labeling data to ensure accuracy and consistency for AI development. The company operates with a flexible working culture.
Was HumanSignal previously called something else?
Yes, HumanSignal was formerly known as Heartex. The company rebranded to HumanSignal to better reflect its mission of embedding human expertise ("human signal") into AI models. The core product, Label Studio, has maintained its name throughout.

Stay in the loop.

One email per week, 5 hand-picked roles.