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LinkedIn Learning
KnowBe4 provides Security Awareness Training to help you manage the IT security problems of social engineering, spear-phishing & ransomware.

Decode and verify SSL/TLS certificates online. Extract X.509 details including issuer, validity, SAN, and fingerprint. Fast, secure, and browser-based.

Which is more popular?
Based on our record, Knowbe4 should be more popular than Cert Decoder. It has been mentioned 6 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | knowbe4.com | certdecoder.com |
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In their own words, as submitted to SaaSHub.


No description of Knowbe4 yet.
Cert Decoder is a free online tool that helps you decode X.509 SSL/TLS certificates in PEM format. It instantly shows important information like the issuer, expiry date, SAN entries, and fingerprint. All data is processed locally in your browser, so nothing is ever sent or stored elsewhere.
What each product offers, as listed by its team.


Possible disadvantages
Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
KnowBe4 is recommended for organizations of all sizes that are looking to bolster their staff's cybersecurity awareness and resilience against social engineering attacks. It is particularly valuable for businesses operating in sectors with high compliance and regulatory requirements, such as finance, healthcare, and government.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Knowbe4 and Cert Decoder.
Cert Decoder's answer:
I built certdecoder.com over the weekend for my own needs. Sometimes in my work, I need to verify and check certificate details.
Cert Decoder's answer:
certdecoder.com was built using just JavaScript and HTML—simple, fast, and with all processing happening locally in your browser, so no certificate data is sent to any server
Cert Decoder's answer:
certdecoder.com is primarily built for developers, sysadmins, cybersecurity enthusiasts, and DevOps engineers.
Cert Decoder's answer:
Simple, fast, and reliable. Some similar tools can’t even decode basic certificates. I rigorously tested my tool with many real-world certificates and covered several edge cases where competitors fall short.
Cert Decoder's answer:
certdecoder.com is primarily built for developers, sysadmins, cybersecurity enthusiasts, and DevOps engineers.
Share your experience with using Knowbe4 and Cert Decoder. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


If knowbe4.com is in header. Move to Phishing test folder. Source: almost 4 years ago
Our security team uses them. It always strikes me as bad form when we are told "don't open e-mail from people you don't know" and "don't click on links in e-mails" and then we get e-mail from "knowbe4.com" that says "You've been... Source: about 4 years ago
We use KnowBe4 with our clients for phishing and training. Source: about 5 years ago
Why? Because I built certdecoder.com and couldn’t find a decent place to submit it. So I said screw it — I’ll build my own. With blackjack and hookers. - Source: dev.to / over 1 year ago
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