Yes, both Slack and SalesSeek offer a Free Trial.
Slack is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
SalesSeek is designed for Medium Business and Small Business.
Pricing for Slack Starts at $2.67/Month whereas for SalesSeek Starts at $75/User/Month.
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 SalesSeek includes Thryv, Salesforce Sales Cloud, monday sales CRM by monday.com, Pipedrive, Zoho CRM, Vendasta, ClickUp, Freshsales, Salesforce, Funnel CRM, Keap, SalesCRM, SimpleCRM, Simply CRM, Salesdash CRM, Easy Simple CRM, DigitalCRM.com and CRM.io by 500apps.