Etchv vs SoniCloud Recorder SDK

Add an invisible watermark to images, PDFs and video, then detect it to see which copy was shared. Forensic watermarking API with a free trial. Hello HN!The inspiration for Etchv came directly from friends who raised concerns about the growing ease of unauthorized media copying without attribution. To address this, Etchv embeds an invisible watermark inside images, PDFs, or short videos that survives modifications like screenshots, format changes, and file compression.You can try it on our homepage without signing up. There's also a live demo where a watermarked PDF page gets screenshotted and the watermark ID is still successfully recovered: https://etchv.com/demo/traceInstead of training a model from scratch...

SoniCloud makes smart voice hardware and software. Its Recorder project is a recording-card device for developers and businesses, with an open BLE protocol SDK, sample integrations for Android, iOS, HarmonyOS and Flutter, and Windows/macOS desktop demos. It supports device connection, recording control, live audio, file transfer, OTA updates and speech-to-text. Hardware specs, samples and custom work are available from the company on request.