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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