Sama review: an AI training data provider for managed evaluation with a quality guarantee mindset

Answer in brief: Sama is our #14 AI training data provider for labs. A Certified B Corporation operating since 2008, it supplies human-verified evaluation and training data for generative AI. Its services include preference ranking, instruction-following checks, model validation and fact checking, RAG evaluation, document-summarization review and creative writing. Sama turns the errors it finds into rewritten prompt-and-response data for fine-tuning. It reports a 99% first-batch acceptance rate and says customers stay an average of 8 years. Its center of gravity is still vision and sensor data rather than credentialed-expert post-training.

Bottom line: For a predictable, managed evaluation-and-rewrite loop from an ethically certified workforce, Sama delivers.

This is independent research based on Sama's site, read on 2026-11-09. We did not test the service.

What Sama supplies to AI labs

Sama's model evaluation process has five steps: consultation, integration, evaluation, rewrite and delivery. It agrees target behaviors with you and connects to your APIs. It then evaluates prompts and responses for factual accuracy, coherence, intent and ethics, and rewrites failing responses into new fine-tuning data. Delivery formats are customizable. Its generative AI menu covers conversational AI, image and video captioning, LLM optimization, summarization, RAG and synthetic data validation.

Proof points

• A 99% first-batch acceptance rate and an average customer tenure of 8 years, by Sama's figures.
• Sama says it can help launch models up to 3x faster. That is its own claim.
• A Walmart case study covers annotation across 2.5M+ product SKUs to improve search.
• Sama achieved B Corp recertification and published a 2024 impact report.

Who Sama fits

• Labs that want managed preference ranking, fact checking and response rewrites.
• Multimodal teams that need image and video caption evaluation.
• Buyers who make workforce ethics a procurement requirement.

Honest drawbacks

• Its focus is broader than frontier post-training by PhD-level experts.
• Its evaluation pages describe English-language conversational work, so check multilingual coverage.
• Pricing is not public.

Pricing model

Custom and scoped per project. Sama says its first conversation covers initial timelines, scope and pricing.

Best alternatives to Sama

• iMerit: expert reasoning data with a strong compliance stack.
• Appen: expert RLHF, SFT and LLM-judge evaluation.
• Prolific: self-serve human evaluation with public fees.

For Sama's core computer-vision labeling, compare vendors on besttrainingdatacompanies.com.

Sama FAQ

Does Sama do LLM evaluation?

Yes. It evaluates LLM outputs for accuracy, coherence and instruction following, and rewrites failures into fine-tuning data.

Is Sama a B Corp?

Yes. Sama is a Certified B Corporation and recently achieved recertification.

What quality does Sama report?

Sama reports a 99% first-batch acceptance rate and an average customer tenure of 8 years.

Sources

• Sama homepage
• Sama model evaluation services
• Sama: Walmart case study
• Sama 2024 impact report

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