Tetragon is a mature, CNCF-backed eBPF security observability and runtime enforcement platform from the Cilium project. It handles comprehensive OS-level security concerns including file access, network, and process monitoring with enforcement capabilities. However, Tetragon is designed for Kubernetes environments and general-purpose server security — not specifically for controlling AI coding agents on developer machines.
Feature Comparison
| Feature | Guardian Shell | Tetragon |
|---|---|---|
| Cgroup-based agent isolation | Guardian Launcher (default) | ✕ |
| eBPF-based enforcement | ✓ | ✓ |
| File access monitoring | ✓ | ✓ |
| Network monitoring | ✓ | ✓ |
| Process tracking | ✓ | ✓ |
| AI-agent specific policies | ✓ | ✕ |
| Interactive approval workflow | ✓ | ✕ |
| Requires Kubernetes | ✕ | Recommended |
| Web dashboard | Built-in | Via Hubble UI |
| Configuration format | TOML | K8s CRDs (YAML) |
| Setup complexity | Single binary | Helm charts + K8s |
| Community maturity | New | CNCF graduated |
| Target use case | AI agent security | Cloud-native security |
Why Choose Guardian Shell
- ✓Cgroup-based agent isolation via Guardian Launcher — unspoofable identity and resource limits per agent, out of the box
- ✓Purpose-built for AI agent security — not general-purpose infrastructure monitoring
- ✓Works standalone on any Linux machine — no Kubernetes required
- ✓Per-agent policies with resource limits (memory, CPU, PIDs) — different rules for Claude Code, Cursor, Aider
- ✓Interactive approval workflow for sensitive access requests
- ✓Simple TOML config instead of Kubernetes CRDs and YAML
- ✓Built-in web dashboard designed for developer workflows
The Verdict
Tetragon is an excellent, battle-tested runtime security platform for Kubernetes environments. If you're already running K8s and need comprehensive infrastructure security, Tetragon is hard to beat. But for the specific problem of controlling AI coding agents on developer machines, Tetragon is overkill — it requires Kubernetes, complex YAML CRDs, and doesn't understand the concept of per-agent policies or interactive approvals. Guardian Shell is purpose-built for this use case: simple setup, per-agent controls, and developer-friendly workflows.