Drag & Drop Page Builder

I need an experience developer or agency to build a drag and drop front end page builder. I need a software similar to Thrive Architect ([login to view URL]) but as a SaaS web app and not a wordpress plugin. We need an HTML landing page builder software similar to the Thrive Architect (frontend builder only). The page builder will have the following elements: -Section Background -Resizable Columns -Headline Text -Paragraph Text -Image -Video -Button -Form -Social -Timer -Custom HTML -Divider -Field Counter -Map -Table -Counter -Progress Bar -Content Reveal -Icon The builder will have: >>Option to preview >>Option to Export As HTML >>Option to Save & Load Editor state (json) >>Option to Save Background section as blocks and insert block Also option for: >>Page design revison - undo/redo >>Insert custom code for JavaScript, HTML/CSS, tracking tags, and more. >>Settings options for fonts, SEO, social info, etc >>Preview - Mobile & Tablet ===================== ===================== We need only the frontend page builder (templates, user management and the SaaS part will be handled by another team). Please take some time to go the page builder of Thrive Architect If you can do this, let me know your budget and timeline. Thank you and happy bidding! NB: I'm not looking for a landing page BUT a web app like Thrive Architect ([login to view URL]) that builds landing pages. You should build from an existing javascript script/library like this: [login to view URL]