AI agent governance tools in 2026
The AI agent governance market is growing rapidly. As agents become more autonomous - writing code, managing infrastructure, processing payments - the need for policy enforcement, audit trails, and human-in-the-loop controls is becoming critical. Multiple analyst firms (Gartner, IDC) now track 'AI agent security' as a distinct category.
Here's how the leading tools compare.
TameFlare
Type: Proxy gateway (source-available)
License: Elastic License v2 (source-available)
Approach: Transparent HTTP/HTTPS proxy that intercepts all agent API calls
| Strength | Detail |
|---|
| Zero code changes | Wrap any agent with tf run |
| Credential isolation | Agents never see real API keys |
| Source-available | Full source code auditable (ELv2) |
| Framework-agnostic | Works with LangChain, CrewAI, n8n, Claude Code, any agent |
Best for: Teams that want full control, source-available code, and framework-agnostic governance.
Zenity
Type: Enterprise SaaS platform
Approach: Unified observability and governance across all agent platforms
| Strength | Detail |
|---|
| Multi-platform | Covers Copilot, Cursor, Claude, custom agents |
| Enterprise features | SSO, RBAC, compliance reporting |
| Runtime governance | Monitors agent reasoning and tool use |
Trade-off: Closed-source SaaS. Your agent data flows through Zenity's infrastructure. No source-available option.
Best for: Large enterprises with multiple agent platforms and compliance requirements.
Knolli
Type: Managed copilot fleet platform
Approach: Platform lock-in with built-in crypto enforcement
| Strength | Detail |
|---|
| Crypto enforcement | Similar to TameFlare's ES256 tokens |
| HITL approvals | Built-in human-in-the-loop |
| Audit trail | Immutable action log |
Trade-off: Requires using Knolli's agent platform. Not bring-your-own-agent.
Best for: Teams starting fresh who want an all-in-one agent + governance platform.
OPA (Open Policy Agent)
Type: General-purpose policy engine
Approach: Rego-based policy language for any authorization decision
| Strength | Detail |
|---|
| Mature ecosystem | Widely adopted in cloud-native |
| Flexible | Can express any policy logic |
| Open source | Apache 2.0 license |
Trade-off: Not agent-specific. No built-in connectors, audit trail, or approval workflow. You build the integration yourself.
Best for: Teams with existing OPA infrastructure who want to extend it to agent governance.
Summary
| Feature | TameFlare | Zenity | Knolli | OPA |
|---|
| Source-available | Yes | No | No | Yes |
| Zero code changes | Yes | Varies | No | No |
| Credential isolation | Yes | No | Yes | No |
| HITL approvals | Yes | Yes | Yes | No |
| Audit trail | Yes | Yes | Yes | No |
| Framework-agnostic | Yes | Yes | No | Yes |
| Free tier | Yes | No | Yes | Yes |
Our recommendation
If you want full control and source-available code: TameFlare.
If you need enterprise SaaS with multi-platform coverage: Zenity.
If you want an all-in-one platform: Knolli.
If you already use OPA and want to extend it: OPA + custom integration.