Alternative firmware for ESP8266 with easy configuration using webUI, OTA updates, automation using timers or rules, expandability and entirely local control over MQTT, HTTP, Serial or KNX. Full documentation at [Moved to: https://github.com/arendst/Tasmota]
Why do you think that https://github.com/tuya/tuya-iotos-embeded-sdk-wifi-ble-bk7231n is a good alternative to Sonoff-Tasmota