LangGuard
Deterministic runtime AI governance control plane
LangGuard is a deterministic runtime AI governance control plane. Two engines work across the full agent lifecycle: SCOPE-MCP maps and compliance-classifies an agent's action surface before it ships, and Arbiter deterministically authorizes every agent action before it executes — clearing safe actions with no added latency and routing anything that crosses a Segregation-of-Duties boundary or policy threshold to a named approver. The authorization is the governance; the audit trail is automatic.
Arcade.dev
Agent identity & tool-calling runtime
Arcade.dev is an agent authorization and tool-calling runtime — "SSO for AI agents." Built by ex-Okta/Auth0 engineers, it lets agents act as the real user via OAuth, brokering tokens and secrets so tool calls run with the right identity and scopes, and enforcing per-action authorization at runtime.
How they compare
Twelve criteria that decide whether an enterprise can prove — not just hope — that its AI agents stay inside policy.
| Criterion | LangGuard | Arcade |
|---|---|---|
| Deterministic, rule-based authorization | ● | ● |
| Pre-execution enforcement | ● | ● |
| Segregation of Duties enforcement | ● | ○ |
| Excessive-agency prevention / least privilege | ● | ◐ |
| Design-time action-surface mapping | ● | ◐ |
| Compliance-classified tools catalog | ● | ◐ |
| Full lifecycle coverage (design-time + runtime) | ● | ◐ |
| Named-approver human-in-the-loop routing | ● | ◐ |
| SOX / GDPR / financial-GRC control mapping & evidence | ● | ○ |
| AI-specific standards (ISO 42001, EU AI Act, NIST AI RMF, OWASP LLM) | ◐ | ○ |
| Immutable / tamper-evident audit ledger | ● | ◐ |
| GRC / internal-audit / IT-governance buyer fit | ● | ○ |
Where Arcade.dev is strong
- OAuth token brokering and agent identity — its crown jewel, built by ex-Okta/Auth0 engineers
- Deterministic, scope-based authorization checks on each tool call
- Broad MCP runtime — 7,500+ tools across 81 servers, with an open-source SDK
- Pre/post-execution hooks that can inspect and block requests inline
Where LangGuard pulls ahead
- No Segregation-of-Duties or conflict-of-duty enforcement
- Governance lives in developer-authored code hooks, not a GRC policy engine
- No design-time compliance classification; catalog is a tool registry, not risk-scored
- Compliance is a SOC 2 badge — no SOX, GDPR, or ISO 42001 control mapping
- Audit logs exist but are not positioned as tamper-evident compliance evidence; developer-led, not GRC
The bottom line
Arcade.dev is a capable agent identity & tool auth. But securing how an agent operates is not the same as governing what it is allowed to do. LangGuard makes a deterministic, rule-based authorization decision on every action before it executes — enforcing Segregation of Duties, routing risky actions to named approvers, and emitting audit-grade SOX/GDPR evidence. It is the governance control plane that sits above the layer Arcade.dev operates in.
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Find out what your agents can do —
before your auditor does.
LangGuard maps your complete agent action surface in minutes. Free for the first five managed agents. All Scopes (Finance, IT, Procurement, HR) included from day one. No policy writing required.
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