Which standard should we align to?
It is important to keep in mind that the standard you select be best suited for both your internal needs and also the needs of your clients and regulators who may require you to meet a certain standard.
For businesses with immature or unknown capability i.e this is the first time you are assessing your business we recommend starting with a Health Check or SMB 1001. It is the shortest assessment and focusses on assessing key controls across all 16 practice areas.
If you do well in the Health Check then you can move on to one of the standards such as ISO 27001 or NIST CSF (if you have a business account) to complete a more in-depth assessment of how mature your controls are across each practice area while also finding out how mature your controls are against the in-scope standards requirements.