Yes, both Harvestr and Twona offer a Free Trial.
Harvestr is designed for Medium Business and Small Business.
Twona is designed for Individuals, Large Enterprises, Medium Business and Small Business.
The starting price of Harvestr begins at $49/Month, while pricing details for Twona are unavailable.
Some top alternatives to Harvestr includes ProdPad, Jira, productboard, Productroad, ProdCamp, Backlogs, Next Please, Primary, IdeaPlan and Producter.
Some top alternatives to Twona includes Jira, Productroad, artwork, Artwork Flow, Anywhere, MRMcentral, Watchwork, PIMworks, ManageArtworks and Paper Workspace.