Arize AI was acquired by Dynatrace in October 2026.
The company now operates as part of a larger organization. Contact the acquirer for current pricing and availability.
Arize AI
Ship Agents that Work — AI & Agent Engineering Platform for development, observability, and evaluation.
Last checked October 15, 2026Quick facts: Arize AI is an AI compliance vendor founded in 2020 and headquartered in Berkeley, United States. Pricing is freemium with paid tiers. Profile last checked October 15, 2026; sources are cited at the bottom of this page.
About Arize AI
Arize AI is an LLM observability and evaluation platform designed for enterprises running AI agents and LLM applications at scale. Its flagship product, Arize AX, provides real-time monitoring, agent tracing, prompt management, online evaluations using LLM-as-a-Judge, and drift detection across NLP, computer vision, and multimodal models. The company also maintains Arize Phoenix, a widely adopted open-source AI observability library built on OpenTelemetry/OpenInference standards.
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Arize AI features
Capabilities Arize AI markets publicly. Inclusion means the feature is documented on the vendor's site — not that it's best-in-class. Last checked October 15, 2026.
Model Monitoring
Production monitoring for performance, drift, data quality, and fairness regressions.
LLM Observability
Logging, tracing, and metrics for LLM applications in production — latency, cost, quality, and error rates across traces and users.
Agent Tracing
End-to-end visibility into multi-step LLM agent runs: tool calls, intermediate reasoning, token usage, latency, and errors at each step.
Drift Detection
Automated detection of distribution shift, feature drift, prediction drift, and performance degradation in deployed ML/AI models.
LLM Evaluation
Systematic testing of LLM outputs for correctness, relevance, safety, and consistency using automated scorers, rubrics, or human review.
Prompt Management
Versioning, templating, A/B testing, and deployment workflows for LLM prompts treated as production artifacts.
Bias & Fairness Testing
Automated statistical testing for disparate impact across protected attributes, with audit-ready reports.
Audit Logging
Tamper-evident logging of governance events (approvals, model changes, policy decisions) required by EU AI Act Article 12 and similar regulations.
Hallucination Detection
Automated scoring of LLM outputs for factual accuracy and groundedness, typically via retrieval-backed verification or reference comparison.
LLM Guardrails
Runtime input/output filtering for LLMs — PII redaction, toxicity blocking, prompt injection defense, policy enforcement.
Arize AI pricing
Phoenix (self-hosted open source, free); AX Free (SaaS, free, 25K spans/month, 1 GB/month, 15-day retention); AX Pro ($50/month, 50K spans/month, 100 GB/month, 30-day retention); AX Enterprise (custom pricing, SaaS or self-hosted). Additional spans at $10/million on Pro; additional GB at $3/GB.
Alternatives to Arize AI
Frequently asked
What is Arize AI?+
Arize AI is a LLM observability platform headquartered in Berkeley, United States, founded in 2020. Profile last checked October 15, 2026.
How much does Arize AI cost?+
Phoenix (self-hosted open source, free); AX Free (SaaS, free, 25K spans/month, 1 GB/month, 15-day retention); AX Pro ($50/month, 50K spans/month, 100 GB/month, 30-day retention); AX Enterprise (custom pricing, SaaS or self-hosted). Additional spans at $10/million on Pro; additional GB at $3/GB. Verified October 15, 2026 from Arize AI's public materials.
Sources
- Arize AI homepage
- Arize AI pricing page
- Arize AI about page
- Arize AI — $70M Series C announcement blog
- PR Newswire — Arize AI Series B announcement
- Adams Street Partners — Why We Invested in Arize AI
- Business Wire via Finviz: Dynatrace completes acquisition of Arize (October 1, 2026)
- Engineering.com: Dynatrace completes acquisition of AI platform Arize (October 2, 2026)
- Dynatrace: Dynatrace to acquire Arize (August 13, 2026)
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