
Mailwarm
Folderly
Warmbox.ai
Warmup Inbox
MailReach.co
InboxAlly
Lemwarm by Lemlist
We don't send emails. We get them seen.

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, Warmy.io should be more popular than Cert Decoder. It has been mentioned 5 times since March 2021.
Website, pricing, platforms and company facts side by side.
|
|
|
|
|---|---|---|
| Website | warmy.io | certdecoder.com |
| Pricing | ||
| Platforms | ||
| Company | Startup from Israel · 100 - 249 employees · 2021 | — |
| Listed in |
In their own words, as submitted to SaaSHub.


Warmy.io is a cloud-based SaaS solution for email deliverability and email warmup services. This AI-powered email warmup tool provides a full suite of tools to help businesses and marketers improve their email sender reputation, ensuring emails land in the inbox and not the spam folder. Here’s...
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
An editorial look at what each product does well and who it suits.


No analysis of Warmy.io yet.
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 Warmy.io 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 Warmy.io and Cert Decoder. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


Warmy.io: AI-personalized warm-up messages, topic selection, auto-archive, and automated monitoring. Focuses on safe, global automation and multi-language flows for international teams.
Warmy emphasizes automation and expansive mailbox coverage. It supports incremental sending, reply simulation, and spam recovery, with options to adjust pacing and review mailbox-level results at a glance.
Warmy provided a real person for a solid one-hour onboarding that got us up and running promptly. Dashboard is easy to use and the options for warming up and plenty of options for maintaining inbox health and placement .
We have no reviews of Cert Decoder yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


As professionals in the field, we understand the struggles that come with ensuring your messages land in the right place. But fear not, for Warmy.io is here to help you overcome the challenges of email deliverability! Our cutting-edge... Source: about 3 years ago
Check http://warmy.io to empower YOUR commercials email deliverability. Source: about 3 years ago
However Warmy is number one expert in Email Deliverability, join us and get 7 days free trial warmy.io. Source: about 3 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
When comparing Warmy.io and Cert Decoder, you can also consider the following products.

Email warmup tool to avoid spam folder, since 2020 - Backed by Email Deliverability Experts
Compare Mailwarm to Warmy.io or Cert Decoder:

Folderly is an all-in-one email deliverability platform to supercharge your email performance. Locate, solve, prevent email deliverability pitfalls, and ensure that your emails reach the Inbox folder.
Compare Folderly to Warmy.io or Cert Decoder:

Warm up your cold email inbox, and never land in spam anymore!
Compare Warmbox.ai to Warmy.io or Cert Decoder:

Warmup Inbox is a tool that automates the process of warming up your email inboxes, raising your sender reputation and inbox health automatically.
Compare Warmup Inbox to Warmy.io or Cert Decoder:

The #1 email warming service to improve your deliverability by generating realistic and meaningful engagement to your emails. Easy-to-use solution to help you land in the main inbox instead of the spam folder.
Compare MailReach.co to Warmy.io or Cert Decoder:

Enterprise Email Warmup. Sender Domain Reputation Repair Tool to get out of spam and see open rates more than double in 4 to 14 days. We engage with your emails to teach mailbox providers not to send your email to the spam or the promotions folder.
Compare InboxAlly to Warmy.io or Cert Decoder: