Yes, both Yalla and Notion offer a Free Trial.
Yalla is designed for Large Enterprises, Medium Business and Small Business.
Notion is designed for Individuals, Freelancers, Medium Business and Small Business.
Pricing for Yalla Starts at $7/User/Month whereas for Notion Starts at $4/Month when Billed Yearly.
Some top alternatives to Yalla includes Quickbase , Smartsheet, Miro, Process Street, Notion, Wrike, TeamGantt, Teamwork, ProjectManager.com, Workep, Taskworld, WirTask, Trackboard, Quick Base, Today, Flowist, Taskwall and ClickUp.
Some top alternatives to Notion includes Jira, Knote, Trello, Confluence, Asana, Easynote, ClickUp, TWiki, MeisterNote and Zenkit Hypernotes.