LessPass is a so-called stateless password manager. Instead of storing passwords, it calculates them each time from a website, a login and a single master password, so there is nothing to synchronise. The idea is based on the Master Password app. LessPass offers browser extensions for Chrome and Firefox, a command-line tool (installable via pip) and mobile apps for iOS, Android and F-Droid. The website also has a password generator, but the project recommends the extensions instead.
LessPass is open source under the GPL-3.0; the mobile app is dual-licensed (MPL 2.0 and GPLv3). The hosted LessPass server is now limited to existing users and new registrations are closed. Anyone who wants the server-backed storage feature has to host their own server. Because passwords are calculated rather than stored, using it without a server means no vault holding your data sits with a provider. The project documentation names no company, place of establishment or parent company.