The problem
Teams can't see why AI agents fail or drift, so unreliable AI ships to production
What they do
Observability and evaluation platform for LLM apps and AI agents (Arize AX, open-source Phoenix)
Traction Phoenix used by 4,000+ enterprises; Dynatrace calls Arize small but rapidly growing (ARR undisclosed)
Hiring trend
- Open roles
- 27
- Ops roles
- 3
- Headcount
- ~200
~200 staff at acquisition (TechTarget); 23 open roles, mostly sales and solutions, still posting post-close
Hiring in
- San Francisco
- Remote (US)
- Remote (Singapore)
Glassdoor
4.5 ★ 33 reviews ↗Funding
- Last round
- $70M
- Stage
- Acquired (Dynatrace, Oct 2026)
- Date
- Feb 2025
Led by Adams Street Partners
- Hiring+1.527 open roles on the live job board (10–29 roles = +1.5)
- Funding recency+0.5Acquired (Dynatrace, Oct 2026) · $70M, Feb 2025 (20 months ago): 12–24 months = +0.5
- Traction+0.75Some growth: Phoenix used by 4,000+ enterprises; Dynatrace calls Arize small but rapidly growing (ARR undisclosed)
- Red flags−11 significant flag in the last 24 months, −1 eachAcquired by public company Dynatrace (NYSE: DT) for $915M, closed Oct 1, 2026; no longer an independent startupDynatrace press release, deal closed Oct 1, 2026 ↗ · Dynatrace press release, deal signed Aug 13, 2026 ↗
- Total1.751.5 + 0.5 + 0.75 − 1 = 1.75 → Steady (1.5–3.49)
Distance is a separate read on how long the lead can last. It doesn't change the score.
Watch-outs
Acquired by public company Dynatrace (NYSE: DT) for $915M, closed Oct 1, 2026; no longer an independent startup
Sources: Dynatrace press release, deal closed Oct 1, 2026 ↗ · Dynatrace press release, deal signed Aug 13, 2026 ↗
Last checked Oct 25, 2026