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CrowdSec
Distil Networks Bot Defense
IsMalicious
Project Shield
Detects and blocks brute force, SQL injection, port scans, and 70+ attack types. One command. Works in 30 seconds.

Website, pricing, platforms and company facts side by side.
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| Website | opalstack.com | defensia.cloud |
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| Company | — | Startup from Spain · 1 - 9 employees · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of Opalstack yet.
Defensia is an open-source agent for Linux servers paired with a real-time SaaS dashboard. Install in one command and get SSH brute force protection, a Web Application Firewall (SQL injection, XSS, path traversal, RCE detection), CVE vulnerability scanning, geoblocking across 200+ countries, and...
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As answered by people managing Opalstack and Defensia.cloud.
Defensia.cloud's answer:
Defensia is the only Linux security tool that combines an open-source agent with a real-time SaaS dashboard, no config files, no regex filters, no manual setup. You get SSH protection, a full WAF, CVE scanning, and multi-server management from a single install command. Everything Fail2ban does, plus a dashboard that shows you what's actually happening on your servers.
Defensia.cloud's answer:
Because it works in 30 seconds and requires zero configuration. Fail2ban needs manual regex filters for every service. CrowdSec requires YAML config and a community hub. Defensia auto-detects your stack and starts protecting immediately. The real-time dashboard, CVE scanner, compliance reports are included and multi server dashboard, not sold as separate products.
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