When comparing PuTTY vs Shellngn - Cloud Based SSH Client, the Slant community recommends PuTTY for most people. In the question“What are the best SSH clients for Windows?” PuTTY is ranked 3rd while Shellngn - Cloud Based SSH Client is ranked 10th.
Ranked in these QuestionsQuestion Ranking
Pro De facto standard client for SSH, Telnet and Rlogin
PuTTY is one of the oldest and most popular clients. It has earned the trust of a great number of users over a long period by being reliable, offering useful features and helpful support. It got into the 15 Essential Open Source Tools for Windows Admins list by InfoWorld.
Pro Can be used on any Windows computer, even without admin rights
Pro Source code available
Full source available. Compile and modify it yourself.
Pro Lightweight and portable
Doesn't require much resources (memory and hard-disk). Can even be run on a system by just downloading without install.
Pro SSH & SFTP in your browser
Since this tool is cloud-based, there's no need to download and install anything. You can simpy run it from the browser.
Pro RDP/VNC Support
Pro Always up to date
Pro Your devices are available on any device
Pro Tunnel support
Pro RDP/VNC In your browser
Remote desktop your servers from the browser.
Pro Telnet Support
Con Can not save passwords
Anyway, you can use "PuTTYgen" to generate a key pair, then use "Pageant" to do a password-less SSH remote login.
Con Lacks features
It is JUST an SSH client. There are many other options with built in X-servers, Multitabbing, etc.
Con Ugly design, too simple
Looks very dated. Does the basic functions very well, but not much more.
Con No global settings
If you want to change a setting for all your connections, you'd have to do it individually.
Con Organizing sessions
Does not have features for organizing session connections (like folders). If you have 5-10 connections that's fine. But if there are 30-50 connections - that becomes a nightmare.
Con Only one session
Cannot open a second session in the same window.
Con Tedious logging/tracing
Its tedious to set up logging and tracing (e.g. for serial connections).
Con No login scripting
$3.90 per month
Con Not free
In fact not only not free, but only available at a subscription basis.
Con Sluggish output
It's ok for a quick session, but compared to native apps it's output is slow.
Con Lack of configurability
Not enough options to trim it to your needs.