Parallel calling without a large seat commitment
Trellus
USD $149.99/seat/month. Power is $99.99/seat/month.
What it does well
It adds calling inside supported CRM and sales engagement workflows through a browser extension. Parallel can dial up to five lines on eligible setups, with no seat minimum.
Where it falls short
Compatibility and line counts depend on the workflow. Team analytics and advanced coaching sit in its quoted Business offering; check the calling allowance.