What is the difference between Cylana EASM vs FestIn?

**Cylana EASM**: AI-powered EASM platform for digital asset discovery and monitoring. built by Cylana. Core capabilities include Domain discovery and tracking, Subdomain discovery and tracking, AI-powered digital asset analysis.. **FestIn**: FestIn discovers open S3 buckets associated with a domain using crawling and DNS reconnaissance techniques.. Both serve the External Attack Surface Management market but differ in approach, feature depth, and target audience.

Who makes Cylana EASM vs FestIn?

**Cylana EASM** is developed by Cylana. **FestIn** is open-source with 230 GitHub stars. Vendor maturity, funding stage, and team size can be important factors when evaluating long-term viability and support quality.

Is Cylana EASM a good alternative to FestIn?

Cylana EASM and FestIn serve similar External Attack Surface Management use cases: both are External Attack Surface Management tools, both cover Reconnaissance, Security Scanning. Key differences: Cylana EASM is Commercial while FestIn is Free, FestIn is open-source. Review the feature comparison above to determine which fits your requirements.

Cylana EASM vs FestIn (2026) | Compare External Attack Surface Management Tools

Cylana EASM vs FestIn: 2026 Comparison

Cylana EASM is a commercial external attack surface management tool by Cylana. FestIn is a free external attack surface management tool. Compare features, ratings, integrations, and community reviews side by side to find the best external attack surface management fit for your security stack.

CST Verdict

Based on our analysis of core features, here is our conclusion:

FestIn

AppSec and cloud infrastructure teams hunting for S3 misconfigurations tied to their own domains should start with FestIn; it's free, which means you can run it immediately without budget cycles, and the DNS reconnaissance approach catches buckets that simpler bucket-enumeration tools miss. The 230 GitHub stars suggest active maintenance and community validation of the crawling methods. Skip this if your threat model requires continuous monitoring or remediation workflows; FestIn is a point-in-time discovery tool, not a compliance scanner.

Data verified Apr 2026