S

Sigma AI Tech Stack

Human data annotation and training data for AI models at scale

IT Services and IT Consulting Miami, Florida 501–1,000 employees Founded 2008 Privately Held

Sigma AI operates a distributed annotation workforce of 25,000+ experts spanning 600+ languages, built atop a data labeling infrastructure anchored in Python, BERT, and GPT integration. The org is almost entirely junior/mid-level annotators (635 headcount in data alone, 584 junior-level roles), with minimal engineering (1 role) and no active tech stack changes — a classic labor-arbitrage model optimized for throughput rather than engineering velocity. Current pain points (process automation, workflow design for generative AI, ethical risks) suggest they're shifting from commodity annotation toward higher-complexity AI training work.

Tech Stack 41 technologies

Core StackActive Directory Linux Prometheus Python Pandas Selenium MATLAB Zapier Power BI NetSuite pandas NumPy scikit-learn OpenAI Windows macOS Android Windows 10 Google Workspace ESXi vCenter Microsoft 365 Firewall Proxy VPN Zabbix SIEM BERT GPT NLTK+11 more

What Sigma AI Is Building

◆Challenges

Process quality and productivity improvement
Identifying generative ai vulnerabilities
Ethical risks in generative ai
Expanding moldovan language data annotation
Process automation
Data confidentiality and security
Meeting deadlines and budgets
Digitalizing accounting processes
High volume recruitment
Designing annotation workflows for gen ai

▲Active Projects

Linguistic projects
Linguistic annotation
Romanian transcription project
Southern pastaza quechua / qichwa / quichwa / wámpuy linguistic project
Serbian linguistic project
German language data annotation
Southeastern puebla nahuatl / tehuacan–zongolica nahuatl linguistic project
High quality annotation projects
Content localization
Turkish transcription project

Hiring Activity

Minimal700 roles · 55 in 30d

Department

Data

635

Translation

3

Ops

2

Support

2

Engineering

1

Finance

1

HR

1

Linguistics

1

Seniority

Junior

584

Mid

43

Senior

18

Intern

3

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About Sigma AI

Sigma AI provides human-powered data annotation, training data sourcing, and labeling services for AI teams, with a focus on generative AI and multilingual projects. The company maintains an in-house workforce of 25,000+ trained annotators across 600+ languages and dialects, recruited and vetted in-house, deployed across 24 countries from the United States to West Africa, Eastern Europe, and Southeast Asia. Active projects span linguistic annotation, transcription, content localization, and high-quality annotation workflows. Founded in 2008, the company serves machine-learning and AI teams at scale, emphasizing data quality, ethical standards, and security.

HeadquartersMiami, Florida

Company Size501–1,000 employees

Founded2008

Hiring MarketsUnited States, Togo, Ghana, Dominican Republic, Poland, China, Mali, Turkey

Frequently Asked Questions

What languages does Sigma AI support for data annotation?

Sigma AI supports 600+ languages and dialects, with active projects in Romanian, Serbian, German, Turkish, Quechua, Nahuatl, and Moldovan. Their 25,000+ annotators are distributed across 24 countries.

What is Sigma AI's tech stack for annotation?

Sigma AI uses Python, BERT, GPT, and OpenAI models for annotation workflows, alongside Power BI for reporting, NetSuite for operations, and standard enterprise infrastructure (Google Workspace, Active Directory, VPN, SIEM).