I use nomorobo and highly recommend it. They don’t store your contacts in the cloud and access to contacts is even optional (though they won’t be able to block

I use nomorobo and highly recommend it. They don’t store your contacts in the cloud and access to contacts is even optional (though they won’t be able to block spoofed ‘neighbor’ calls if you don’t give access, but they can label them). They also market themselves as focused on privacy and they charge a $2/month subscription. I haven’t gotten a spam call since I’ve used them.