diff --git a/README.md b/README.md
index 8e45e9c..758fe38 100644
--- a/README.md
+++ b/README.md
@@ -95,3 +95,9 @@ A list of search engines useful during Penetration testing, vulnerability assess
 - [PulseDive](https://pulsedive.com/)
 - [NetoGraph](https://netograph.io/)
 - [SecurityTrails](https://securitytrails.com/)
+- [AlienVault](https://otx.alienvault.com/)
+- [Archive.ph](https://archive.ph/)
+- [DNS.BufferOver.run](https://dns.bufferover.run/)
+- [TLS.BufferOver.run](https://tls.bufferover.run/)
+- [C99.nl](https://api.c99.nl/)
+- [CertSpotter](https://sslmate.com/certspotter/)