Slack offers Free Trial, but TalkDesk does not.
Slack is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
TalkDesk is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Slack Starts at $2.67/Month whereas for TalkDesk Starts at $85/user/month when monthly.
Some top alternatives to Slack includes Microsoft Teams, Glip, Google Chat, ChatWork, Dialog, Office Chat, imBee, Takle, SPACE Channel and Teamwork Chat.
Some top alternatives to TalkDesk includes Nextiva, Zendesk Talk, HoduCC, Call Center Studio, ClickDesk, Aircall, Dialpad Contact Center, VoxDesk, LeadDesk and Freshdesk Contact Center (Formerly Freshcaller).