Looking for a recommendation for a virtual phone number provider for a WhatsApp bot - I will not promote

So as the title says, I'm building a WhatsApp bot and I am looking for a provider. I am building it by myself with code, I'm not looking or some bot building all included suite of tools or something. It will only be used for the bot. It won't be added to my mobile device. I won't be making any calls. It is simply to establish a WhatsApp entity. Of course though the first text message needs to be received to confirm the number, but that's about it. I've been trying to research here, but I am asking here also because: 1. Every list I see has different recommendations. I can't figure out who'd the NameCheap/GoDaddy providers here, which is important because.. 2. It needs to be reliable. Not a service that will disappear tomorrow and might cause me to loose all my customers? My business is 99% based on the WhatsApp bot and if something goes bad I might loose many clients who won't know how to find it again. 3. The prices vary between free, to 1$ a month, to 25$ a lifetime to 15$ a month. I'm ok with paying an extra buck if it means it's reliable but I don't want to pay just because it includes a bunch of stuff I don't need. So, any recommendations?