CrowdStrike has signed a definitive agreement to acquire Fiddler AI, a Palo Alto startup that makes software to monitor, evaluate and explain the behavior of AI models and agents. The cybersecurity company announced the deal on November 3, 2026, from Austin, Texas, and from its Fal.Con Europe conference in Barcelona.
CrowdStrike did not disclose the price. CyberScoop, citing the Wall Street Journal, reported that the deal values Fiddler at about $400 million. According to CrowdStrike, it will pay mostly in cash, with part in stock subject to vesting conditions. The deal is expected to close in the fourth quarter of CrowdStrike's 2027 fiscal year, subject to customary conditions.
Fiddler's technology will be sold on CrowdStrike's Falcon platform under the name Falcon Observe, with general availability also planned for the fourth fiscal quarter of 2027. The same day, CrowdStrike announced a separate agreement to buy Dreadnode, a startup that tests AI systems for security weaknesses.
What Fiddler built
Fiddler was founded in 2018 by Krishna Gade, its chief executive, and Amit Paka, its chief operating officer. In a blog post about the deal, Gade wrote that the idea came from his time at Facebook, where he helped build the "Why am I seeing this post?" feature that explained a ranking model's choices to users. Before Facebook he worked at Twitter, Pinterest and Microsoft, according to Fiddler's website. Paka previously worked at Samsung, PayPal and Microsoft.
The company started with explainability and monitoring for machine learning models and later added evaluation, observability for AI agents and runtime guardrails, Gade wrote. CrowdStrike says the product can test an agent before deployment for accuracy, task completion and policy compliance; trace its decisions, reasoning and tool calls; flag drift, hallucinations and unintended actions in production; keep auditable records across in-house, third-party and coding agents; and track token use and spending.
It uses OpenTelemetry and supports agent frameworks including LangGraph, Amazon Bedrock, AWS Strands and Google's Agent Development Kit. Customers listed on Fiddler's website include Nielsen, Integral Ad Science, the U.S. Department of Energy, Qualtrics, Thumbtack and American Family Insurance.
“Fiddler is the flight recorder for every agent: the observability to explain exactly what an agent did and why.”
Why CrowdStrike is buying
CrowdStrike already sells Falcon Guardian, which it says protects AI agents from attack and misuse. It presents Fiddler as the other half: a way to check that agents did what they were meant to do, and to link their behavior with Falcon's identity, cloud and runtime data.
George Kurtz, CrowdStrike's founder and chief executive, framed the deal around accountability. He said that when a regulator or a board asks what an agent did, answering that the model did it is not enough. Gade said Fiddler was started to help companies answer whether they could trust what their AI agents were doing, and that joining CrowdStrike would let it offer that on a larger scale.
Gade's post said existing customers would remain central. Neither company said anything about winding down Fiddler's current products.
The founders and the funding
Fiddler raised $100 million in total, according to The SaaS News. Its most recent round was a $30 million Series C in January 2026 led by RPS Ventures. Earlier investors Lightspeed Venture Partners, Lux Capital, Insight Partners, Capgemini Ventures, Dallas VC, Dentsu Ventures and Mozilla Ventures took part, and LG Technology Ventures, Benhamou Global Ventures and LDV Partners joined.
Fiddler's board included Raviraj Jain of Lightspeed, George Mathew of Insight Partners and Timothy Murphy of RPS Ventures, according to the company's website. At about $400 million, the reported price would be roughly four times the capital the company raised.
A shopping trip for AI security
Together with Dreadnode, which the Journal valued at about $95 million according to CyberScoop, CrowdStrike's two Barcelona announcements come to almost $500 million in reported value. Neither price was confirmed by the company.
The deals show security vendors moving to cover AI agents, which can write code, reach sensitive data and call other software for their users. At the same event CrowdStrike also announced an AI kill switch and Falcon Guardian protection for Anthropic's Claude Cowork, according to its press release list. With Fiddler it is betting that companies will want a record of an agent's behavior as well as protection from attackers.
