When comparing PuTTY vs PromptPal, the Slant community recommends PuTTY for most people. In the question“What are the best terminal emulators for Windows?” PuTTY is ranked 7th while PromptPal is ranked 23rd.
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 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 Can be used on any Windows computer, even without admin rights
Pro Tabbed UI makes the user's life easier
You can have PromptPal open automatically with the same tabs as used in the most recent session, starting in the same directories.
Pro Multiple shells supported
PromptPal supports several shells (including Powershell) and it allows you to choose which shell to run through the preferences.
Pro Persistent, editable command history
You can mark most used commands in PromptPal as favourites.
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
Con Tedious logging/tracing
Its tedious to set up logging and tracing (e.g. for serial connections).
Con No global settings
If you want to change a setting for all your connections, you'd have to do it individually.
Con No login scripting
Con Not free
Although there's a free trial available, PromptPal is not free to use.