Yes, both Slack and Swiftype Search offer a Free Trial.
Slack is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Swiftype Search is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Slack Starts at $2.67/Month whereas for Swiftype Search Starts at $79/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 Swiftype Search includes 3RDi Search, Site Search 360, Datafari, Cludo Site Search, SearchBlox Search, AddSearch, Algolia Site Search, Elasticsearch, Sajari and Searchbar.