CrowdStrike to acquire Fiddler AI and Dreadnode to monitor and test enterprise AI agents
CrowdStrike agreed on 3 November 2026 to buy Fiddler AI and Dreadnode for AI agent monitoring and testing, and added an AI Kill Switch to Falcon Guardian.
By Emre A.Published
Tech AI LatestCrowdStrike said on 3 November 2026 at Fal.Con Europe in Barcelona that it has signed definitive agreements to acquire Fiddler AI, which monitors and explains AI agents in production, and Dreadnode, which attacks AI models and agents before they ship. Both deals should close in CrowdStrike's fourth fiscal quarter of 2027. CrowdStrike did not disclose terms; The Wall Street Journal put them at about $495 million combined. It also launched an AI Kill Switch.
Key facts
- Announced: 3 November 2026 at Fal.Con Europe, Barcelona (CrowdStrike)
- Fiddler AI: agent observability and explainability, to be sold as Falcon Observe
- Dreadnode: pre-deployment security testing of AI models, applications and agents, to join Falcon Guardian
- Closing: both expected in CrowdStrike's fourth quarter of fiscal 2027, subject to customary conditions
- Price: not disclosed by CrowdStrike; The Wall Street Journal reported about $400 million for Fiddler and $95 million for Dreadnode
- Also launched: AI Kill Switch in Falcon Guardian, available now
What CrowdStrike announced
CrowdStrike used its Fal.Con Europe conference in Barcelona on 3 November 2026 to announce two acquisitions aimed at the same problem: companies are deploying AI agents faster than they can watch or test them. It signed a definitive agreement to acquire Fiddler AI, which it describes as a leader in AI agent observability and explainability, and a second agreement to acquire Dreadnode, whose platform continuously tests AI models, applications and agents for security weaknesses before they are deployed.
Fiddler AI will become a product called Falcon Observe on the Falcon platform, which CrowdStrike says will be generally available in the fourth quarter of its fiscal 2027. Dreadnode technology goes into Falcon Guardian, the AI agent security product CrowdStrike launched in September. Both deals are expected to close in the same quarter, which runs from November 2026 to January 2027, subject to customary closing conditions. CrowdStrike did not disclose the price. The Wall Street Journal reported about $400 million for Fiddler and $95 million for Dreadnode, roughly $495 million in total; CrowdStrike has not confirmed those figures.
Who the two companies are
Fiddler was founded in 2018 by chief executive Krishna Gade, who previously worked on machine learning debugging tools for Facebook's News Feed, and Amit Paka. It started with tools that explain why a machine learning model made a given prediction and now describes itself as an observability and security platform for enterprise AI, with a focus on monitoring agents after deployment. It raised a $30 million Series C in January 2026 led by RPS Ventures, with Lightspeed and Lux Capital among existing investors.
Dreadnode was started by Will Pearce, who led an AI red team at NVIDIA, and Nick Landers, formerly vice president of research at NetSPI. The two built AI red teams at Microsoft, NVIDIA and large enterprises before founding a company that sells offensive testing of AI systems. It raised a $14 million Series A led by Decibel, with In-Q-Tel among the investors. Its products include Crucible, a practice range for AI hacking, and tools that probe deployed AI applications for weaknesses such as prompt injection.
The AI Kill Switch and the wider strategy
Alongside the deals, CrowdStrike introduced an AI Kill Switch in Falcon Guardian, available now. CrowdStrike says it lets an authorised administrator halt an AI agent where it runs, stop it from relaunching and cut its access to the company network, with every action logged. It works at the Falcon gateway first, with endpoint enforcement to follow.
Put together, the three announcements cover an agent's life cycle: Dreadnode tests it before release, Fiddler watches what it does in production, and Falcon Guardian blocks or stops it when it misbehaves. That is a land grab in a crowded field. CrowdStrike bought AI security startup Pangea in September 2025, and other platform vendors, identity providers and cloud companies are all selling agent controls, as seen in IBM's agent identity work with HashiCorp Vault.
What to watch next
Customers of Fiddler and Dreadnode will want to know what happens to their standalone products and contracts after closing; CrowdStrike has not said. The price will be clearer if CrowdStrike reports the deals in its next quarterly filing. And the AI Kill Switch on endpoints has no stated date. Buyers comparing agent security tools should ask how each one discovers agents that IT did not approve, since a kill switch only works on agents it can see. More agent security news is collected in the AI cybersecurity section.
What changed
| Before | Falcon Guardian discovered and blocked AI agents, but CrowdStrike had no product for testing models before deployment or for detailed agent observability |
|---|---|
| After | CrowdStrike is buying Fiddler AI (Falcon Observe) and Dreadnode (pre-deployment testing) and has shipped an AI Kill Switch for Falcon Guardian |
| Who it affects | Security teams running AI agents, current Fiddler and Dreadnode customers, and competing AI security vendors |
Questions people ask
- How much is CrowdStrike paying for Fiddler AI and Dreadnode?
- CrowdStrike did not disclose terms. The Wall Street Journal reported about $400 million for Fiddler and $95 million for Dreadnode, about $495 million combined.
- When will the CrowdStrike acquisitions close?
- CrowdStrike expects both to close in the fourth quarter of its fiscal 2027, which runs from November 2026 to January 2027, subject to customary conditions.
- What does the CrowdStrike AI Kill Switch do?
- It lets an authorised administrator stop an AI agent, block it from relaunching and cut its network access, with each action logged. It is available now in Falcon Guardian at the gateway, with endpoint support to follow.
Sources
- CrowdStrike to Acquire Fiddler for AI Agent Observability (CrowdStrike, 3 Nov 2026)
- CrowdStrike Delivers AI Security and Safety for the Enterprise (CrowdStrike, 3 Nov 2026)
- CrowdStrike Introduces the AI Kill Switch for AI Safety (CrowdStrike, 3 Nov 2026)
- CrowdStrike moves to acquire Fiddler and Dreadnode, adding AI observability and testing to its security platform (CyberScoop, 3 Nov 2026)
- CrowdStrike to acquire cybersecurity startups Fiddler AI, Dreadnode for reported $495M (SiliconANGLE, 3 Nov 2026)
Reference pages
- CrowdStrike company
- Fiddler AI company
- Dreadnode company
Spotted an error? See the corrections policy and tell the editor. Facts in this story come from the sources listed above; vendor claims are attributed.
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