In-path enforcement
- GRC
- No (post-hoc)
- Identity
- No (access only)
- Prompt firewall
- Yes (input/output)
- MCP gateway
- Yes (network)
- ActantOS
- Yes (tool-call)
Why ActantOS
Runtime tool-call enforcement
ActantOS does not compete as another agent framework or prompt filter. It is the policy firewall that blocks unauthorized agent actions before they reach your systems.
Agent Runtime Control Plane (ARCP)
The runtime operations layer for governed agentic autonomy. ActantOS answers one authorization question before any tool call executes: is this agent allowed to perform this action on this resource in this context right now?
Comparison
Market landscape
Out-of-process
- GRC
- Yes
- Identity
- Yes
- Prompt firewall
- Yes
- MCP gateway
- Yes
- ActantOS
- Yes
Policy language
- GRC
- Natural / policy docs
- Identity
- IAM roles
- Prompt firewall
- Regex / vector
- MCP gateway
- Basic rules
- ActantOS
- AWS Cedar (formal)
Interception method
- GRC
- API polling
- Identity
- OAuth lifecycle
- Prompt firewall
- LLM wrapper
- MCP gateway
- Network proxy
- ActantOS
- MCP proxy & adapter
Sandbox execution
- GRC
- No
- Identity
- No
- Prompt firewall
- No
- MCP gateway
- No
- ActantOS
- Yes (Docker → gVisor → Firecracker)
Primary audience
- GRC
- GRC & legal
- Identity
- Security & IT
- Prompt firewall
- AI engineers
- MCP gateway
- Network engineers
- ActantOS
- Platform & SecOps
| Dimension | GRC | Identity | Prompt firewall | MCP gateway | ActantOS |
|---|---|---|---|---|---|
| In-path enforcement | No (post-hoc) | No (access only) | Yes (input/output) | Yes (network) | Yes (tool-call) |
| Out-of-process | Yes | Yes | Yes | Yes | Yes |
| Policy language | Natural / policy docs | IAM roles | Regex / vector | Basic rules | AWS Cedar (formal) |
| Interception method | API polling | OAuth lifecycle | LLM wrapper | Network proxy | MCP proxy & adapter |
| Sandbox execution | No | No | No | No | Yes (Docker → gVisor → Firecracker) |
| Primary audience | GRC & legal | Security & IT | AI engineers | Network engineers | Platform & SecOps |
Differentiation
Where ActantOS fits
Non-blocking, out-of-path systems document compliance after the fact. ActantOS is a low-latency in-path gateway that blocks actions dynamically and generates tamper-proof evidence GRC tools ingest.
Identity providers answer who and how. ActantOS inspects what command is executing — parsing shell, file paths, and MCP tool payloads — as the inline policy decision engine.
Prompt firewalls secure model inputs and outputs. ActantOS secures the tool-execution layer with deterministic policy, not LLM judgment.
Network-edge routing with basic DLP. ActantOS adds session-aware Cedar evaluation, budget state, approval state, and sandboxed execution tailored to autonomous agents.
Framework-specific in-process policy. ActantOS is language-agnostic and out-of-process — it secures Python, TypeScript, and binary agents alike.
Ready to govern your agents?
Book a technical assessment. We will map your agent deployments to governance gaps and show how ActantOS closes them.