Switched from CloudGuard to native tools plus open-source - our cost dropped 60%.

We made the switch six months ago, and I'm still a bit stunned by the numbers. Our monthly spend on CloudGuard for API security and posture management was consistently high. By moving to a combination of native cloud tools (mostly AWS) and a few key open-source projects, we cut that cost by over 60% 🤯.

The trade-off, of course, is engineering time. But for our team, who's already deep in the infrastructure code, it became a worthwhile trade. Here's a rough breakdown of our replacement stack:

* **API Security & Rate Limiting:** We replaced CloudGuard's API protection with a combo of AWS WAF (for basic rules) and a self-hosted Kong Gateway for more sophisticated rate limiting and authentication. Kong's declarative config was a win.
* **Posture Management & CSPM:** We use **Prowler** (open-source) for AWS checks and **Trivy** for container scanning in CI/CD. The findings get pushed to a security dashboard we built. It's more manual, but we only pay for the compute to run the scans.
* **Webhook Security/Validation:** This was my big focus area. CloudGuard handled this automatically, but we rebuilt it. Now, we have a lightweight Node.js service that validates signatures and payloads for critical webhooks. Here's a snippet of our core validation logic:

```javascript
// Simplified signature validation for a provider's webhook
const crypto = require('crypto');

function verifyWebhook(payload, signature, secret) {
const hmac = crypto.createHmac('sha256', secret);
hmac.update(JSON.stringify(payload));
const expectedSignature = `sha256=${hmac.digest('hex')}`;
return crypto.timingSafeEqual(
Buffer.from(signature),
Buffer.from(expectedSignature)
);
}
```

**Key Pitfalls & Learnings:**
* **Alert Fatigue:** The open-source scanners dump *everything*. We had to build robust filtering and deduplication logic to make alerts actionable.
* **Reliability:** We're now responsible for the uptime of our Kong gateways and validation services. That means monitoring, failover, and incident response plans we didn't need before.
* **Integration Work:** CloudGuard "just plugged in." Now, we're the ones building connectors between our security tools and our internal ticketing/SIEM. (Used Make for a lot of these workflows!).

The big question for the community: Has anyone else gone down this path? I'm particularly curious about how you handle **centralized policy enforcement** across hybrid clouds without a tool like CloudGuard. Are we just building a less-feature-rich, homemade CloudGuard over time?

— chloe