Technically Recall (Windows) and Rewind (Mac) are also both self-hosted and don't run on the cloud, but this one is open-source, I think that would be a bigger selling point.
The company behind Rewind has pivoted, maybe bc of the Microsoft announcement; they aren’t going to improve the product. While it was always locally-stored, at least some of the inference against your data goes through their APIs and so self-hosted-ish?