Find and fix AI failures - before they ship
Automated benchmarks miss real-world risks. Sigma experts test AI behavior across language, culture, and modality – spotting and solving problems before they happen.
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 study
Scalable human evaluation for RLHF
How we helped a frontier AI developer generate high-IRA human preference data across text, voice, and video to improve real-world model alignment.
Culturally aligned multimodal localization
We localized scripts, images, and video assets across 15+ global markets using fully human-led workflows designed for cultural accuracy and emotional fit.
Measuring user intent at scale
Structured human evaluation helped an AI team identify intent misalignment and improve response relevance across diverse languages and regions
Human-centered voice annotation for speech AI
We built a scalable voice evaluation framework that captured tone, emotion, and paralinguistic cues to improve speech
synthesis and recognition quality
In-house benchmarks often miss what matters
Sigma helps you detect and avoid AI risk:
- Non-English languages
- Cultural nuance and pragmatics
- Emotional tone and appropriateness
- Voice and multimodal interactions
Measure, find and fix real-world AI vulnerabilities with
Sigma’s human evaluation infrastructure.
Unparalleled data privacy, from industry-leading certifications and secure facilities.
