How is the open-source voice assistant space these days? Is there a self-hosted alternative to Alexa these days?
It's entirely open, and relatively hackable - but also a pain to configure and requires 1 machine with a GPU (several years old is fine, I'm running mine on a nearly decade old Nvidia GTX 1080) and a couple satellite ESP32 devices (Espressif ESP32-S3-BOX-3).
Home Assistant is also doing a more integrated version, but last I looked it was still "cloud-only" which defeats the purpose for me, since I was interested from a privacy standpoint. It does look like they finally released a local preview (at least for some languages) but I haven't yet tried them. By default, it still looks like they're using Google for TTS, which is a hard "NO!" from me.
I've been pretty disappointed that they really seem to want to drive monetization with their voice features, and force people into the HA cloud services, but again - I haven't tried the latest release so take my frustrating with a grain of salt. They made a lot of noise in early 2023, and late last year still only supported cloud options... I was annoyed.