If you are looking for a plug and play solution the most commonly chosen toy is “The Handy”. The best performing solution is the OSR2+ or SR6 (open source strokers by tempestVR). Basically just need a 3D printer or you can buy one prebuilt from here. Performs miles better than the launch but requires more tinkering/maintenance than a commercial product like the handy.
For the OSR2/SR6:
https://discuss.eroscripts.com/t/osr2-sex-robot-for-sale-website-is-up/6250
https://www.patreon.com/tempestvr
For the Handy:
www.thehandy.com