The human context company for generative AI
Smarter, safer LLMs demand better training data. Sigma offers experts in hundreds of languages and domains, to deliver complex, high-quality annotation at scale.
Discover the new standards for AI quality
Discover the new standards for AI quality
Traditional AI chased 99.99% accuracy — but gen AI demands nuance, judgment, and creativity. Learn the 10 new markers for quality human data annotation that power smarter, safer LLMs.
OUR SERVICES
Smarter AI starts with better data
Trust is built on truth
Ground your LLM in human research‑verified facts — including domain expertise — to improve accuracy at scale.
Secure and safeguard LLMs
Red‑team prompts, stress‑test responses, and guard against unsafe outputs to build models that respect privacy and prevent harm.
Connect elements to understand
Link audio, image, video, and text inputs into cohesive multimodal data sets so AI can interpret complex, real‑world scenarios.
Listen beyond just words
Capture emotion, tone, and intent so your AI interprets nuance the way your customers do — enhancing user experience and engagement.
Source. Curate. Scale.
Collect, refine, and synthesize high‑quality, multilingual datasets — expanding your AI’s reach and reliability worldwide.
Meaning is nothing without context
Annotate phonetics, structure, and linguistic cues to train AI to speak naturally, understand correctly, and communicate with clarity.
Sigma serves the world’s largest AI builders, with a track record to prove it
enhanced fraud detection with optimized NLP models
improved model accuracy for clinical text interpretation
fewer product returns for retail computer vision projects
accurate transcriptions in 24 languages — in two weeks
Featured case studies
Scaling transcription across 24 languages
How we launched 24 expert teams simultaneously to deliver 2,000+ hours of multilingual video transcription.
Embedding human insight into search
We helped a search engineering team fine-tune ranking algorithms with on-demand human annotation.
Natural conversations, uncommon dialects
We enabled a conversational AI team to collect diverse, authentic speech data in more than a dozen underrepresented dialects.
Pixel-perfect labeling for computer vision
Sub-pixel image annotation helped a robotics client dramatically improve object detection and recognition precision.
30+ years of AI data expertise — now defining the next 30
We deliver complex projects for global tech giants.
We help fast-growing unicorns scale their LLMs.
And we help governments safeguard their systems.
Learn what our human-centric approach to gen AI can do for you.
Unparalleled data privacy, from industry-leading certifications and secure facilities.
