Update README.md (#2146)

Author: manisoni28

README.md

@@ -81,6 +81,7 @@ awesome list of [YARA-related stuff](https://github.com/InQuest/awesome-yara).
 * [ESET](https://www.eset.com)
 * [ESTsecurity](https://www.estsecurity.com)
 * [Elastic Security](https://github.com/elastic/protections-artifacts)
+* [FactorX.ai](https://factorx.ai)
 * [Fidelis XPS](https://www.fidelissecurity.com/network-security-appliance/Fidelis-XPS)
 * [FireEye, Inc.](https://www.fireeye.com)
 * [Forcepoint](https://www.forcepoint.com)