HubSpot

While the software is entirely free, it is limited to businesses with just a few employees. However, even though its functionality may be somewhat restricted, it has received excellent feedback. The full range of solutions makes it an excellent choice for small businesses looking to increase sales.

With a clear dashboard that allows you to sort deals and track all necessary data, including lead status and the name of the company's sales funnel in real time, Hubspot CRM is an easy-to-use tool for managing your business' activities.

Hubspot gives you unlimited users and storage, which can handle up to a million contacts. While tailored for clients with sophisticated needs, Hubspot goes above and above what you'd expect for free software, making it an excellent fit for small companies seeking to boost efficiency.