I've been working in the voice-first space (Alexa, Google Assistant, Bixby) for several years and haven't found a good product to sell. I was looking into creating a CMS with features specifically for SSML to scratch an itch that I had experienced with a client but realized there wasn't a market for it.
This idea came to me after listening to several indie hackers episodes where the guest suggested WordPress plugin development. I already knew that Alexa is primarily used in the kitchen to help with cooking tasks, but the wp plugin idea was the spark I needed. I'm creating my first WordPress plugin which will allow recipe bloggers to create an Alexa skill with little effort.