AgentIndex icon
AgentIndex
martin-loop logo
martin-loop
★ 398
vs
Sentinelgate logo
Sentinelgate
★ 25

martin-loop vs Sentinelgate

martin-loop: MartinLoop is a governance layer for AI coding loops that enforces budget caps, verifier gates, rollback evidence, and audit trails. It prevents unbounded retries by stopping unsafe or uneconomical work before execution, providing visibility and accountability for autonomous coding agents.; Sentinelgate: SentinelGate is a self-hosted, container-native, zero-lock-in proxy that intercepts every action of an AI agent before it executes, applying deterministic rules to block unauthorized tool calls, shell commands, and file operations. It provides a full audit trail, content scanning, and session-aware policies, and works with any MCP-compatible client or sandbox.

01

TL;DR

martin-loop logo
martin-loopSecurity & Safety · ★ 398

Bounding AI agent retry loops with budget and safety constraints

Read martin-loop full review →
Sentinelgate logo
SentinelgateSecurity & Safety · ★ 25

Protect against prompt injection attacks by blocking unauthorized tool calls

Read Sentinelgate full review →
02

Side-by-Side Comparison

Field
martin-loop logomartin-loop
Sentinelgate logoSentinelgate
Category
Security & Safety
Security & Safety
Stars
★ 398
★ 25
License
Apache-2.0
AGPL-3.0
Install Command
npm install -g martin-loop
curl -sSfL https://raw.githubusercontent.com/Sentinel-Gate/Sentinelgate/main/install.sh | sh
Updated
1d ago
6mo ago
Open Source
Yes
Yes
Website
↗ Visit
↗ Visit
GitHub
↗ GitHub
↗ GitHub
Tags
agent-runtime, ai-agent-runtime, ai-coding-agents
access-control, ai-agents, ai-security
03

Features

martin-loop logomartin-loop
01Budget governance with hard caps on USD, iterations, and tokens
02Verifier gate that blocks execution unless verification passes
03Failure taxonomy classifying 11 failure classes
04Safety leash evaluating commands, file scope, and secrets before execution
05Rollback evidence capturing state before and after each attempt
Sentinelgate logoSentinelgate
01Deterministic enforcement with explicit rules
02Content scanning for PII, secrets, and IPI
03Session-aware policies using CEL
04Full audit trail with live streaming
05Identity and access control with API keys and roles
04

Use Cases

martin-loop logomartin-loop
↳Bounding AI agent retry loops with budget and safety constraints
↳Auditing AI coding runs with structured JSONL records
↳Enforcing policy-as-code for autonomous coding agents
Sentinelgate logoSentinelgate
↳Protect against prompt injection attacks by blocking unauthorized tool calls
↳Govern AI agents in sandboxes (Docker, E2B, Kubernetes) with deterministic policies
↳Audit and monitor all agent actions for compliance and security
FAQ

FAQ

What is the difference between martin-loop and Sentinelgate?
Both martin-loop and Sentinelgate are in the Security & Safety category. martin-loop has 398 stars, while Sentinelgate has 25 stars.
Which is better, martin-loop or Sentinelgate?
The best choice depends on your use case. Choose martin-loop if Bounding AI agent retry loops with budget and safety constraints, and Sentinelgate if Protect against prompt injection attacks by blocking unauthorized tool calls.
Is martin-loop free or open source?
Yes, martin-loop is open source on GitHub (Apache-2.0).
Is Sentinelgate free or open source?
Yes, Sentinelgate is open source on GitHub (AGPL-3.0).
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Related

Alternatives to martin-loop →Alternatives to Sentinelgate →martin-loop details →Sentinelgate details →