Kyde vs Zenity
Zenity has been in agent security longer than almost anyone, and its scope today is broad: SaaS agents like Copilot and ChatGPT Enterprise, cloud platforms like Bedrock and Vertex, even device-based coding agents, covered through three modules for observability, posture and detection and response, with inline controls to stop unsafe actions. The architectural difference to Kyde is where the control attaches. Zenity connects to each agent estate through platform integrations: one connector per ecosystem, deep in that ecosystem. Kyde stands at the one place an agent has to pass to reach a model, regardless of ecosystem: the network egress you control, with deterministic policy and a hash-chained, tamper-evident ledger. Estate-by-estate coverage versus one unavoidable control point. That choice shapes everything else.
Choose Zenity if
- →Your agents live in the big SaaS estates (Microsoft Copilot stack, ChatGPT Enterprise, Agentforce) and you want deep, platform-aware visibility there
- →You value maturity: Zenity has worked on agent and automation security since before it was a category
- →You want posture management and detection and response in one platform
Choose Kyde if
- →Your agent surface is broader than the platforms anyone built a connector for, including in-house agents calling model APIs directly
- →Enforcement must be deterministic and provable, not just present: tamper-evident records of what was blocked and what executed under which policy
- →EU sovereignty and in-perimeter evidence are procurement requirements
| Zenity | Kyde | |
|---|---|---|
| Coverage model | Per-estate platform connectors (SaaS, cloud, device) | One network boundary for every agent and provider routed through it |
| Agents outside covered estates | Not reached until a connector exists | Governed at the egress they must cross anyway |
| Blocks before execution | Inline controls advertised; mechanism per platform, publicly undocumented | Deterministic deny-by-default, same mechanism for every agent that crosses it |
| Policy primitive | Platform-aware rules, posture and detection | Mandate-based: what is not allowed does not execute |
| Audit trail | Platform logging and forensics | Hash-chained, vendor-independent ledger (Ed25519 signing on Enterprise) |
| Deployment | Agentless API connectors per estate, endpoint components for device agents | One environment variable or group policy |
| EU sovereignty | US and Israel based company, cloud platform | Edge enforcement in your perimeter, air-gapped available |
| Regulatory anchor | AI agent security broadly | Evidence for the agent layer of NIS-2, DORA and EU AI Act duties |
What Zenity does well
Zenity deserves the early-mover credit: they were securing citizen-developer automations when most of the industry had not noticed the problem, and they translated that head start into the agent era. Their platform reach is real, their research team regularly publishes strong work on agent attack techniques, and covering SaaS, cloud and device agents in one console is operationally valuable for security teams drowning in estates. If your risk concentrates inside the big agent platforms, Zenity sees things there that a boundary cannot, because it speaks each platform's language.
The connector treadmill versus the chokepoint
Estate-based coverage is as good as its connector list, and the agent world grows faster than any connector roadmap. Every new platform, every in-house agent framework, every vendor tool with an embedded agent is a new integration question. The boundary inverts the economics: agents change constantly, but they all cross the same network egress to reach their models. Kyde governs there once, and new agents are covered by default, not by roadmap.
What "enforcement" has to mean in an audit
Zenity advertises inline controls that stop unsafe actions, and we take that at face value. The audit question goes one level deeper: can you show a regulator the exact policy under which an action was allowed or blocked, and prove the record was never altered? That requires determinism and cryptography, not just capability. Kyde's answer is structural: the same input yields the same verdict every time, and every verdict lands in a hash-chained ledger no vendor controls.
Where the evidence lives matters too. For EU-regulated buyers, agent governance records held in a US cloud platform raise their own procurement questions. Kyde enforces at your edge and keeps the ledger in your perimeter.
Can you run both?
Yes, and large Microsoft estates might want to: Zenity for deep platform posture and detection inside the estates it covers, Kyde as the deterministic boundary and evidence layer across everything, covered estate or not. If you must choose, choose by where your uncovered surface is bigger.
Does Zenity block agent actions?
They advertise inline controls that stop unsafe actions across their covered platforms. The evaluation question is mechanism and proof: how deterministic is the decision, and can the record survive adversarial review?
We only use Copilot. Is the boundary still relevant?
Copilot is rarely alone for long. A week of recorded traffic shows you what else crosses your egress. If it truly is only Copilot, you lost nothing finding out.
Which one helps with EU AI Act logging duties?
Article 12 requires automatic, trustworthy logs for high-risk systems. Kyde covers the agent layer of that duty with cryptographic hash chains, not the whole obligation, and Ed25519 signing is on the Enterprise tier. High-risk enforcement begins December 2, 2027. NIS-2 and DORA apply today.
Cover the agents no connector knows about.
Start with one process area. Two weeks, a dated readout, and a fixed price in writing.