Yes, both ONLYOFFICE and Clust offer a Free Trial.
ONLYOFFICE is designed for Large Enterprises, Medium Business and Small Business.
Clust is designed for Medium Business and Small Business.
The starting price of ONLYOFFICE begins at $1,200per One Server, while pricing details for Clust are unavailable.
Some top alternatives to ONLYOFFICE includes PandaDoc, Nimbus Note, Zoho Docs, CDOC, LibreOffice, OfficeFiles, Ability Office, OfficeSuite, Collabora Online and WPS Office.
Some top alternatives to Clust includes PandaDoc, Document Locator, Docsvault, PaperNIC, DocuWare, Documint, docMgt, EZ Doc Filer, docEdge DMS, MSB Docs and Docsmore.