Maximizer Software Ltd are the leading provider of proven and affordable customer relationship management for sales, marketing and customer service, and being the No 1 player in the Mobile CRM market.
For businesses that need something that's both easy-to-use and frugal, Vipre Endpoint Security Cloud is an excellent fit, as long as you don't need advanced threat analysis or endpoint detection and response (EDR) features.
ESET has dramatically improved its SaaS offering in both interface and usability. It offers a high level of protection, too, but some lingering UI quirks might make it more challenging to use than some competitors.