The best replacement for connectwise is autotask.

The best alternatives to connectwise are rated as following:
★★★★★  autotask
★★★★  zendesk
★★★  tigerpaw
★★  spiceworks
★★  dynamics crm
★  commitcrm
★  sysaid

Your alternative for connectwise is not listed? Suggest!
Speaking about connectwise, one probably shouldn't forget about labtech.

Other search terms related to connectwise and their ratings are:
★★★★★ labtech
★ kaseya
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Google Trends

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connectwise
autotask
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