There are few steps while selecting the bank. It’s a corporate decision, check with your finance team. Usually in start up, company ties up with one bank for all financial dealing.
Second step is check what all facilities are being provided for salary account by the bank. Bank will check with you on your requirements, eg. No. of employees, their CTC what facilities are required, location etc, based on this they offer the options. Bank will also inform you what all documentation is required. You need to understand with them on exceptions/ options in case of non availability of relevant documents.
Once these negotiations are over. Bank will ask certain letters/ documentations to be signed by company, before proceeding with formal opening of accounts.
You need to have one point contact/ authorized person to interact with bank and know the relations manager/ contact person in bank for any further communication.
Also, for salary transfer through net, you need to follow the required documentation as required by bank.