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<title>AgentShield vs Portkey: Spend Control vs Gateway Routing</title>
<meta name="description" content="Portkey routes API calls. AgentShield blocks runaway spending before it happens. Prevention vs routing, see the difference for AI agent safety.">
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<h1>AgentShield vs Portkey: Spend Control vs Gateway Routing</h1>
<p style="font-size:1.1em;color:var(--muted);margin-bottom:32px">Portkey routes API calls. AgentShield blocks runaway spending before it happens. Prevention vs routing, see the difference for AI agent safety.</p>

<h2>What Portkey Does</h2>
<p>Portkey is an API gateway and router for LLM calls. It provides load balancing, fallbacks, caching, and observability across multiple LLM providers. It's excellent for managing which provider handles each request and optimizing cost-per-token.</p>

<h2>What AgentShield Does</h2>
<p>AgentShield is a spend-control enforcement engine. It evaluates every API call against budget rules before execution and blocks transactions that exceed limits. It's not a router, it's a firewall.</p>

<h2>Feature Comparison</h2>
<table>
<thead><tr><th>Capability</th><th>AgentShield</th><th>Portkey</th></tr></thead>
<tbody>
<tr><td>Blocks transactions before execution</td><td><span class="feature-check">✅ <1ms eval</span></td><td><span class="feature-x">❌ Routes, doesn't block</span></td></tr>
<tr><td>Transaction limit rules</td><td><span class="feature-check">✅ Per-call caps</span></td><td><span class="feature-x">❌ Not supported</span></td></tr>
<tr><td>Daily spend caps per agent</td><td><span class="feature-check">✅ Per-agent limits</span></td><td><span class="feature-x">❌ Budget alerts only</span></td></tr>
<tr><td>Velocity detection</td><td><span class="feature-check">✅ Rolling window</span></td><td><span class="feature-x">❌ Not available</span></td></tr>
<tr><td>Merchant allowlists</td><td><span class="feature-check">✅ Approved providers</span></td><td><span class="feature-x">❌ Provider routing only</span></td></tr>
<tr><td>Category blocks</td><td><span class="feature-check">✅ Crypto, gambling, etc.</span></td><td><span class="feature-x">❌ Not available</span></td></tr>
<tr><td>LLM provider gateway</td><td><span class="feature-check">❌ Not a router</span></td><td><span class="feature-x">✅ Core feature</span></td></tr>
<tr><td>Load balancing / fallbacks</td><td><span class="feature-check">❌ Not a gateway</span></td><td><span class="feature-x">✅ Multi-provider</span></td></tr>
<tr><td>Zero dependencies</td><td><span class="feature-check">✅ Python stdlib only</span></td><td><span class="feature-x">❌ Requires SDK</span></td></tr>
<tr><td>Self-hostable in 60s</td><td><span class="feature-check">✅ Single Docker image</span></td><td><span class="feature-x">✅ Gateway mode</span></td></tr>

</tbody>
</table>

<h2>When to Use Portkey</h2>
<ul style="color:#ccc;margin-bottom:20px;padding-left:20px">
<li>You need to route between multiple LLM providers</li><li>You want automatic fallbacks and load balancing</li><li>You need per-provider cost optimization</li>
</ul>

<h2>When to Use AgentShield</h2>
<ul style="color:#ccc;margin-bottom:20px;padding-left:20px">
<li>You need hard spend limits that block transactions</li><li>You run autonomous agents that could enter infinite loops</li><li>You want per-agent budget controls, not just routing</li>
</ul>

<h2>Use Both Together</h2>
<p>Route through Portkey for provider management, then through AgentShield for spend enforcement. Portkey picks the provider, AgentShield ensures you don't overspend.</p>
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<h2 style="margin-top:0">The $2,800 Test</h2>
<p>If an AI agent makes 21 API calls at $133 each in 60 seconds at 3 AM:</p>
<p><strong style="color:var(--danger)">Portkey</strong> logs it. You see the damage in the morning dashboard.</p>
<p><strong style="color:var(--accent)">AgentShield</strong> blocks it in under 1ms. The agent never spends the money.</p>
<p style="margin-top:12px"><strong>Prevention costs $19/month. A single runaway agent costs $2,800 in 60 seconds.</strong></p>
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