✓01
Skill discovery and MCP security scanning are first-class, not bolted on
SENTINEL VS LEGIT SECURITY
Sentinel vs
VibeGuard 2.0.
Enterprise vibe-coding and agent security, with skill discovery and blocking
VibeGuard is Legit Security's answer to the same problem, wrapped into their existing application security platform. It's mature enough to already ship blocking and skill/MCP scanning in one product at v2. Like MintMCP, it has no individual-developer tier — it's sold into enterprise AppSec budgets.
| Sentinel | VibeGuard 2.0 (Legit Security) | |
|---|---|---|
| Category | AI agent monitoring — early-access v1 prototype | Enterprise agentic AI security |
| Monitoring | Desktop harnesses and browser agents: shell, files, network, browser actions | Monitors agent commands and tool calls, with skill discovery and MCP security checks built into the same product. |
| Skill / MCP scanning | Yes — flags risky instructions before you pull a skill | Yes — skill discovery and MCP security scanning are core, not an add-on. |
| Blocking / enforcement | Not yet — v1 is observe and alert; ask-and-approve gating is v2 | Yes — blocks dangerous operations, aimed at Fortune 500-scale rollouts. |
| Individual tier | Planned free tier for individual developers | None publicly listed — enterprise-focused, v1 shipped Q4 2025, v2 shipped August 3, 2026. |
| Deployment | Early-access prototype, hosted at app.explainx.ai | Enterprise deployment; part of Legit Security's broader application security platform. |
| Pricing | Not yet announced | Enterprise, no public price |
WHAT LEGIT SECURITY DOES WELL
Credit where it’s due.
✓02
Backed by an established application security vendor with existing enterprise relationships
✓03
Blocking is available now, not on a roadmap
WHERE SENTINEL DIFFERS
Why we’re building
this anyway.
→01
A free, low-friction individual tier that doubles as top-of-funnel and detection tuning
→02
Positioned around a single audit trail across mixed harnesses (Claude Code, Cursor, Copilot, browser agents), not primarily an AppSec platform extension
→03
Narrower, faster-moving scope — a dedicated agent monitoring product instead of one module in a larger AppSec suite
THE HONEST VERDICT
Which one
should you use?
If you're already a Legit Security customer, or you want agent security folded into a broader AppSec platform, VibeGuard is a natural fit. Sentinel is a better fit if you want a dedicated, agent-agnostic monitoring product that a developer can adopt for free before IT ever gets involved.
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