Your experienced partner for highest quality AI training data
Create smarter AI with better training data. We source and annotate highest quality training data at scale with teams, processes and tech curated to fit your project.
500+
Languages and dialects supported
4
Out of 5 global tech titans are long-term clients
99.99%
Accuracy available – 98% accuracy guaranteed
We help solve your most complex data annotation challenges
Training data makes or breaks an AI. As AI application complexity continues to grow, it takes experience to find the right approach to training data. We tap into 30+ years of expertise in the data annotation space to cut through the complexity and deliver training data with guaranteed accuracy, at scale.
Highest-quality data through the right mix of people and technology
Data strategy services
Data sourcing
Data annotation
Human-in-the-loop
How Sigma delivers
Guaranteed accuracy
Through our experience, proven processes, professional annotators and quality assurance, we guarantee 98% accuracy - 99.99% if needed.
Problem solvers
We thrive on complexity and love a challenge. Come to us with your toughest annotation projects and we’ll help you find the right approach.
Annotation excellence
We vet and train our own diverse workforce of 25,000+ annotators, linguists, project managers and subject matter experts across 5 continents.
Security commitment
World leaders in secure facilities design, implementation and operation, we are ISO 27001 and SOC-2 certified and 100% GDPR compliant.
Customers first
We custom-fit our processes to fit your unique project - from curated annotator teams down to our data labeling and process automation tools.
Quality at scale
Covering 500+ languages and dialects, our annotators and linguists analyze 200+ million video frames and over a million words a day.
Want more reasons for choosing Sigma? Learn more
Why inclusion helps build better AI
Human-in-the-loop annotation creates training data with nuance and context that only people can provide. But representation within annotator teams matters — otherwise biases can creep into the data. This is why we personally vet, hire and train our growing workforce of 25,000+ annotators, linguists and subject matter experts with a focus on inclusion and suitability for each unique project.
Working from 100+ countries across 5 continents, we employ over 70% women, collaborate with the Juan XXIII Foundation to engage employees with disabilities, and provide living-wage, remote jobs to annotators in low-income and rural areas. We’re committed to creating a human-centric culture that fosters respect, dignity and meaningful opportunities.
Case studies
Launching and Scaling Video Transcription in 24 Languages and Dialects
Designing Secure Facilities for Sensitive Data Annotation
Pixel-Perfect Annotation for Recognizing Products in Images
Let’s work together to build smarter AI
Whether you need help sourcing and annotating training data at scale, or you need a full-fledged annotation strategy to serve your AI training needs, we can help. Get in touch for more information or to set up your proof-of-concept.