Yes, both Algolia Site Search and Sajari offer a Free Trial.
Algolia Site Search is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Sajari is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Algolia Site Search Starts at $29/Month whereas for Sajari Starts at $79/Month.
Some top alternatives to Algolia Site Search includes Site Search 360, Swiftype Search, Datafari, SearchBlox Search, AddSearch, Elasticsearch, Sajari, Searchanise, Searchbar and Zevi.
Some top alternatives to Sajari includes 3RDi Search, Site Search 360, Swiftype Search, AddSearch, Algolia Site Search, Searchanise, Searchbar, YesPlz, SEOcrawl and Lookin.