Yes, both Overleaf and Formstack Documents offer a Free Trial.
Overleaf is designed for Individuals, Large Enterprises, Medium Business and Small Business.
Formstack Documents is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Overleaf Starts at $15/Month whereas for Formstack Documents Starts at $92/Month when Billed Yearly.
Some top alternatives to Overleaf includes Manuscripts, Etherpad, PleaseReview, Documint, Microsoft Word, Google Docs, pdfFiller, ReactiveDoc, LiveDocs, Slick and SciSpace (formerly Typeset).
Some top alternatives to Formstack Documents includes Paperform, Smart Forms, SimplyDocs, Documint, Adobe Acrobat DC, pdfFiller, FormSwift, Formsio, Framestr Online Forms and Formstack Sign.
