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The continual learning platform for agents — AI observability, LLM evaluation, and agent improvement (Phoenix OSS + Arize AX), being acquired by Dynatrace for $915M
HQ: Berkeley, CA (Dynatrace press release cites San Francisco) | Founded: 2020 | Employees: ~150-220 (Tracxn ~223 / PitchBook ~135 by source; 26 open roles Aug 2026) | Stage: Pending acquisition by Dynatrace — definitive agreement Aug 13, 2026, $915M ($815M cash + replacement equity), expected to close ~Q2/Q3 FY2027 | Website: https://arize.com
Arize AI was founded in 2020 in Berkeley, CA by Jason Lopatecki and Aparna Dhinakaran, two ex-Uber engineers who had built Michelangelo, Uber's machine-learning platform, and experienced firsthand how painful it was to troubleshoot models in production. Their thesis: AI teams need visibility into why models fail — drift, quality decay, hallucinations — before failures reach customers, and this need compounds as LLMs and agents go mainstream. Arize shipped the first AI-observability footprint across both traditional ML and then generative AI, open-sourcing the Arize Phoenix evaluation/tracing library and creating OpenInference, the standard GenAI semantic conventions layered on OpenTelemetry. The company raised institutional rounds (a Series A in 2022 led by Battery Ventures, a Series B in
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