Cost / License
- Free
- Open Source
Platforms
- Linux
DNS recon is the most popular Linux alternative to Fierce.
DNS recon is the most popular Open Source & free alternative to Fierce.
- DNS recon is Free and Open Source
Fierce is described as 'Semi-lightweight scanner that helps locate non-contiguous IP space and hostnames against specified domains' and is an app. There are three alternatives to Fierce for Linux, Python, Mac and Windows. The best Fierce alternative is DNS recon, which is both free and Open Source. Other great apps like Fierce are SubBrute and Knockpy.
DNS recon is the most popular Linux alternative to Fierce.
DNS recon is the most popular Open Source & free alternative to Fierce.
Knockpy is a portable and modular python3 tool designed to quickly enumerate subdomains on a target domain through passive reconnaissance and dictionary scan.

Knockpy is the most popular Windows & Mac alternative to Fierce.