Airtable, Zoho Creator, AppGini, DaDaBIK, Clappia, Caspio, Matrify, Webase, Tadabase, dbFront, Corteza Low Code, Planet Crust, Worksheet Systems, Sodadb, Fusioo, RestDB.io, TeamDesk, Quixy, iFreeTools Creator, my-app.net, AttendHRM, Formitize, SpreadsheetLIVE, StratusBase, DabbleDB, EditGrid, ZeusDB, Invantive Producer are some alternatives to Knack.