https://www.home-assistant.io/integrations/#all
...including all the big names like Hue. Nest. Ring. Yale. Schlage. Ikea. HomeKit. Plex. Sonos. Alexa. Sure, you can integrate arbitrary digital/MQTT/Zigbee/BLE stuff you find on AliExpress for pennies, or you can buy the name-brand stuff from big box stores.
You're not locked into just the Hue ecosystem just because you have their bulbs. I don't understand why HomeKit doesn't just talk to the bulbs instead of allowing Phillips to force you to go through their hub. This is on Apple for not supporting the lights directly.