Which CRM is better for business?

Spreadsheet is always a good start. Simple , free and works on a small scale. As you overgrow it, you will know why it is not working anymore and that will help you to find a tool that does what your spreadsheet stopped being able to do.

HubSpot is actually pretty good. For starters, it's free. They have most of the tools you'd want to run an efficient sales process available as add-ons too. It's also gaining steam and likely to end up with the most third party integrations behind Salesforce. They also have a HubSpot for Startups program which can get you 90% off your first year.

Full disclosure: I used to work at HubSpot on the product team, but I didn't work on the CRM. In fact, I kind of built a competitive product to the HubSpot CRM internally for awhile, so wouldn't say it was good unless it really was.

Big fan of Pipedrive myself. Fairly lightweight, but with good features. Visual pipeline structure is nice. Easy to use interface (though text formatting is a weak spot).

Shameful self promotion, but I am currently working on a user feedback collection crm at www.testimonly.com check it out to see if you might be interested.