If you can provide the sound files, something like Asterisk + PHPivr[1] could work for you. Problem: It's quite old (2010). If you need text-to-speech thats co

If you can provide the sound files, something like Asterisk + PHPivr[1] could work for you. Problem: It's quite old (2010). If you need text-to-speech thats could be a problem. Text-to-speech needs good software. Maybe you can call Microsoft or Google text-to-speech API and cache replies (I don't know if this is allowed under their ToS). Finally you could try a platform like Twilio and make ir point to your app endpoint. This could be a static site (made with hugo/jeckyln/vim) or a dynamic one. [1] https://code.google.com/archive/p/phpivr/ https://code.google.com/archive/p/phpivr/ Just make a static site with HUGO/Jeckyln, host it somewhere