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SurveyJS
Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.
Hey! Danila is here. When using our protocol, all the data is stored on-chain, we don't have any centralized servers where we store anything. We are open source, so you don't need to believe me - you can easily audit our protocol code: https://github.com/ylide-io/sdk - we don't collect any data at all. All messages are private and end-to-end encrypted between users. Neither we nor anyone except the recipient can read these messages. But we support public messages on the protocol level: their functionality is similar to the telegram channels logic, and messages there are not encrypted.