Hex-Rays Decompiler is an addition\extension for IDA Pro and I doubt it can work as a separate standalone product.
Please see "Prerequisites" part of Hex-Rays Decompiler Manual:
"The decompiler requires the latest version of IDA..."
https://www.hex-rays.com/products/decompiler/manual/prereq.shtml
But this question, IMO, should be addressed to the Hex-Rays Sales Department.
Answer from Denis Laskov on Stack ExchangeIDA series, part 1: the Hex-Rays decompiler
decompilation - How do I evaluate Hex-Rays Decompiler without purchasing IDA Disassembler? - Reverse Engineering Stack Exchange
Hex-rays is moving to a Subscription model
IDA freeware version is 7.0?!
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Hex-Rays Decompiler is an addition\extension for IDA Pro and I doubt it can work as a separate standalone product.
Please see "Prerequisites" part of Hex-Rays Decompiler Manual:
"The decompiler requires the latest version of IDA..."
https://www.hex-rays.com/products/decompiler/manual/prereq.shtml
But this question, IMO, should be addressed to the Hex-Rays Sales Department.
I suggest you look for decompiled code samples posted on the internet. That should give you a good indication of the decompiler's capabilities.
You can interactively decompile. Or also decompile in bulk. It decompiles a 22M binary containing 57k functions, totalling about 4.3M lines of code in about 1 hour. The decompilation can also be modified using pytbon scripts.
With some tweaking of variable and function types you can get very readable code. Also of c++ or objective-c with lots of virtual function calls.