This week / Companies / Arize AI
Agent infrastructure
Arize AI
AI observability and evaluation platform, including the open-source Phoenix project.
arize.com · LinkedIn · Data run November 13, 2026
Status: Acquired by Dynatrace, closed October 1, 2026. It is no longer ranked. Source, Oct 1, 2026
Momentum, week of November 9, 2026
n/a from 0 of 5 signals
What the data says
Positive signals
- Headcount grew +33.7% over three months (as of Jul 30, 2026).
- Tranco top-sites rank climbed 20.4% over about 30 days.
Watch-outs
- Web traffic down 7.6% over three months (as of May 1, 2026).
- No round found since Feb 2025.
Key facts
- Headquarters
- San Francisco, California, United Statessource
- Founded
- 2020source
- Last round
- Series C (Feb 2025)sourceas of round date Feb 20, 2025
- Headcount
- 218sourceas of Jul 30, 2026
- Headcount change
- 3m +33.7% · 12m +37.1%as of Jul 30, 2026
- Monthly web visits
- 226Ksourceas of May 1, 2026
- Web traffic change
- 3m -7.6% · 12m +49.8%as of May 1, 2026
- Tranco top-sites rank
- #95,685sourceas of Nov 12, 2026
- Tranco rank, ~30 days
- +20.4%as of 2026-10-15 to 2026-11-12
- LinkedIn followers
- 29Ksource
- Hacker News stories, 90 days
- 1source
Recent news and launches
- Oct 6, 2026 · What agent traces can tell you without an LLM judge (Hacker News (2 points)) · discussion
- Oct 5, 2026 · Dynatrace’s $915M Arize deal bets AI agents are just another app to monitor (The New Stack)
- Oct 1, 2026 · “No human wants to look at billions of traces”: Dynatrace bought Arize because agents need a new kind of observability (The New Stack)
- Sep 11, 2026 · Dynatrace and Arize AI push observability from detection toward action (SiliconANGLE)
- Aug 13, 2026 · Dynatrace, Inc. (NYSE:DT) signed a definitive agreement to acquire Arize AI, Inc for approximately $920 million. (MarketScreener)
- Aug 13, 2026 · Dynatrace acquires Arize for AI agent development (TechTarget)
- May 29, 2026 · Agent harnesses have an expiration date (Hacker News (1 points)) · discussion
- May 19, 2026 · Building a self-improving agent on a context graph of human disagreement (Hacker News (4 points)) · discussion
n/a means our sources had no value; we do not estimate. Spot an error? Request a correction with a public source.