Best Agent Passport Alternatives

As of September 2026, AIDiveForge tracks 12 verified alternatives to Agent Passport. The top three by verified-data score are Fabraix Red Team Playground, Aegitox, and Cortega AI Governance Platform. Agent Passport is an open-source authorization layer that sits between your agents and the actions they take. You issue a scoped passport — specific permissions, a — the alternatives below are ranked by how completely and recently their data is verified, their community rating, and real visitor engagement.

Last updated September 2, 2026 · 12 alternatives

Ranked by AIDiveForge's verified-data score: data completeness, verification recency, community rating, and real visitor engagement. How we rank · No tool can pay for placement.

1. 

   1. Fabraix Red Team Playground

   Fabraix Red Team Playground is an open-source, MIT-licensed testing environment structured around CTF-style challenges that let you probe published agent prompts for prompt injection vulnerabilities and guardrail failures. The workflow is concrete: challenges present a live agent prompt, you craft adversarial inputs, and the platform scores whether your attack broke containment. Self-hosting via npm means your proprietary prompts never leave your environment, which matters when the thing you are testing is a production system prompt you cannot share publicly. The challenge library is community-contributed and public, so coverage depends entirely on what the research community has submitted — niche agent architectures with specialized guardrail logic will find thin coverage fast.

   FreeOpen SourceAPISelf-hostedVerified Aug 14, 2026
2. 

   2. Aegitox

   Aegitox intercepts Discord messages before they are read, runs them through a dual MiniLM-L6-v2 semantic pipeline locally, and replaces hostile content with target-aware de-escalation placeholders in 2–12ms — bypassing cloud API round-trips entirely. The free tier covers real-time toxicity interception and raid defense. Automated karma-based penalties, incident reports, and the one-click DM appeal system that routes staff review are paid-only features. The appeal system is the architectural detail that matters most for enterprise use: the bot acts autonomously, but a human signs off on the final penalty — so you are not handing discipline entirely to a model. The system has no API and no self-hosted option, so teams that need on-premise deployment or want to pipe moderation signals into their own data stack will hit a hard wall.

   Paid$0 forever; $14.99/mo ProfessionalVerified Jul 8, 2026
3. 

   3. Cortega AI Governance Platform

   Cortega deploys as a gateway layer on infrastructure you control, intercepting every LLM call — from browsers, agents, servers, and cloud runners — and running identity verification, data inspection, and policy enforcement before the request egresses. The control plane manages policy, identity, routing, and budget caps across every gateway; the analytics plane turns that governed traffic into an org-wide picture of who is calling what model, at what cost, with what data categories. Where it earns its place is regulated environments: audit trails record identity, data category, policy decision, approval, model, provider, and outcome — the evidence reviewers actually ask for, not a raw log dump. The ceiling appears when your governance requirements demand deep application-layer logic that lives outside the gateway path, or when your teams are still in early AI experimentation and the architecture review overhead exceeds the compliance exposure you are trying to close.

   PaidAPISelf-hostedVerified Aug 16, 2026
4. 

   4. NeuralTrust TrustGate

   NeuralTrust TrustGate sits between your agents and the models, tools, and services they reach, enforcing policy at the interaction level rather than bolting controls on after the fact. The vendor states the gateway handles real-time enforcement at sub-100ms latency and claims behavioral, contextual, and multilingual detection across 22 million-plus AI interactions analyzed. Self-hosted deployment via on-prem or VPC keeps data inside your perimeter — a hard requirement in regulated industries where data leaving the environment ends the conversation. The open-source core is Apache-2.0 licensed, which means your security team can audit what is actually running. Enterprise features, SIEM integration, and dedicated support are paid-only.

   PaidOpen SourceAPISelf-hostedVerified Aug 14, 2026
5. 

   5. Dike

   Route your OpenAI-compatible traffic through Dike and every prompt, retrieval step, and completion becomes a sealed, cryptographically verifiable audit record — the kind an auditor can check, not just a log you printed yourself. PII is stripped before anything touches storage, flagged responses queue for human sign-off, and when a serious incident fires, Dike opens the Article 73 case and starts the 15-day reporting clock automatically. The gateway is fail-open, so if audit storage goes unreachable, your requests still reach the model. The ceiling appears when your compliance requirements go beyond what a passive proxy can enforce — custom risk-scoring logic, multi-jurisdiction rules, or on-premises data residency all require architecture Dike does not currently offer.

   Paid€49/moAPIVerified Jul 8, 2026
6. 

   6. Phixo

   The scan pulls from five intelligence sources — rules engine flags, Google Safe Browsing, AI reasoning, domain reputation, and link checking — and returns a risk score with a plain-English breakdown of exactly what looks wrong. That explanation layer is the differentiator: instead of a red badge you have to trust blindly, you see the specific indicators, from sender domain age to credential-harvesting link structure. The tool stores no email body content, which matters for teams with data handling obligations. The wall appears fast: 10 free scans a day is the ceiling without a paid account, and there is no API, no self-hosted option, and no inbox coverage outside Gmail and Outlook web.

   PaidVerified Aug 16, 2026
7. 

   7. PassControl

   PassControl sits between your agents and your LLM provider, giving each agent its own scoped credential while keeping the actual provider key server-side only. Before a call reaches OpenAI or any other provider, PassControl checks the agent's identity, its kill state, the model scope it's allowed, and whether its budget is still available — then returns a signed receipt so you have a verifiable record. Suspend one agent and the rest of the fleet keeps running. The product is in private beta for the hosted cloud path, which means production teams with strict uptime requirements should treat it as early-stage. Self-hosting via npm is available, but the vendor is explicit that the system has not yet been independently audited.

   PaidAPISelf-hostedVerified Aug 16, 2026
8. 

   8. Panguard.AI

   Panguard installs in one command, runs entirely offline with zero telemetry, and auto-detects agents across a wide surface — Claude Code, Cursor, VS Code Copilot, Gemini CLI, and more. The vendor states 768 ATR (Agent Threat Rules) execute locally as deterministic checks before any skill loads, then continue guarding each action at runtime against prompt injection and poisoned MCP tools. Rules contributed anywhere benefit every adopter — the vendor describes this as 'threat crystallization.' The ceiling appears when a threat is genuinely novel: deterministic rules only catch what someone has already seen and codified, so the AI analysis fallback carries the weight for zero-day patterns. Teams with regulated environments get signed, audit-ready output without routing data to a third party.

   FreeOpen SourceSelf-hostedVerified Jul 20, 2026
9. 

   9. Argot

   Argot runs statistical checks against your repository's own commit history to flag code that looks foreign to the codebase — wrong libraries, reversed import direction, misplaced logic, or tests quietly skipped to cover up a failing change. It checks a diff in roughly 200ms with no network call and no second LLM in the loop. The vendor reports 97.3% of foreign patterns caught against a 0.25% false-positive rate on real edits. The ceiling is detection scope: it surfaces what statistically doesn't fit, but it cannot enforce rules that have never appeared in your history. Repos with sparse or inconsistent histories get weaker signals.

   FreeOpen SourceSelf-hostedVerified Aug 14, 2026
10. 

    10. ButterClaw

    ButterClaw runs as a self-hosted security monitor for AI agent deployments, watching post-authorization behavior for prompt injection attempts, credential exfiltration, and policy violations in real time. When it detects a breach condition, it can automatically revoke OAuth tokens and shred local credentials without waiting for a human to intervene. All of this runs locally — no cloud telemetry, no outbound data — which matters when the agents themselves are handling sensitive credentials. The Apache 2.0 license and Docker deployment model mean you own the stack entirely. The trade-off: without a vendor-hosted control plane, your team carries the operational weight of tuning and maintaining policies.

    FreeOpen SourceAPISelf-hostedVerified Aug 14, 2026
11. 

    11. Stonefold

    Stonefold intercepts each action an agent tries to take, checks it against rules your team wrote and approved, routes sensitive ones to a named person for sign-off, and writes every attempt to an audit record — regardless of outcome. The vendor's own test is the clearest argument for it: a cheap model fell for a planted fraud email twelve out of twelve times, while an expensive model caught it every time, but with Stonefold's bank-detail rule in place, neither model let money reach the attacker. The checkpoint lives outside the model, so swapping models doesn't change your exposure. The project is at specification v0.4 and explicitly described as a working prototype — not a hardened production system.

    FreeOpen SourceAPISelf-hostedVerified Aug 14, 2026
12. 

    12. Vultrino

    Vultrino runs as a self-hosted credential proxy: agents reference an alias like 'github', and Vultrino injects the real token server-side, scrubs it from egress, and enforces a policy layer that decides whether the request is allowed at all. The agent never sees the key. AES-256-GCM encryption with Argon2 key derivation protects credentials at rest, so a stolen storage file doesn't yield anything readable without the master password. WASM plugins extend the model to PGP signing, SSH authentication, and crypto wallet transaction signing — credential types most proxy tools don't touch. The policy engine lets you scope each agent to specific URL patterns and HTTP methods, so a compromised agent role can't pivot beyond what it was granted.

    FreeOpen SourceAPISelf-hostedVerified Aug 14, 2026

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Alternatives are selected by shared category and ranked by the AIDiveForge data pipeline. AIDiveForge is editorially independent — no money changes hands for inclusion or ranking.