Yes, both Intervals and Notion offer a Free Trial.
Intervals is designed for Individuals, Large Enterprises, Medium Business and Small Business.
Notion is designed for Individuals, Freelancers, Medium Business and Small Business.
Pricing for Intervals Starts at $29/Month whereas for Notion Starts at $4/Month when Billed Yearly.
Some top alternatives to Intervals includes Smartsheet, Miro, Process Street, Wrike, Notion, TimeTracker App, Tick, TimeTrack, Time Track Bill, TimeControl, Track My Work, Teamwork, ProjectManager.com, ProWorkflow, Quick Base, ClickUp and TaskBlast.
Some top alternatives to Notion includes Jira, Knote, Trello, Confluence, Asana, Easynote, ClickUp, TWiki, MeisterNote and Zenkit Hypernotes.