#1
OpenAIAI research and deployment company providing GPT models and developer APIs.
Popularity
77.86
AIIStack index
Rankings built from attributable activity—not sponsorships, votes, or self-reported claims. Drill into every company’s evidence before making a decision.
No paid placement
Scores are cohort-normalized and use a versioned model. Visibility remains withheld until its evidence panel exists.
Foundation models
Open-source adoption signals such as GitHub stars and forks.
4 companies with sufficient evidence
AI research and deployment company providing GPT models and developer APIs.
Popularity
77.86
AI safety and research company building Claude models and developer APIs.
Popularity
55
AI company providing language models and developer APIs for production applications.
Popularity
37.86
31,224 GitHub stars
3,773 GitHub stars
758 GitHub stars
396 GitHub stars
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