tom552
Jmp.chat is the first one that pops to mind. Though prepaid Mint Mobile is a common recommendation.
I'm not really sure what Cape is honestly providing here.
This older Reddit discussion mentions some facts https://old.reddit.com/r/privacy/comments/1dmy9i3/anyone_hear_of_cape_or_use_them_before_their/
Though also just reading Cape's FAQ hits most of the highlights.
They don't track anything themselves, and collect minimal data, but they outsource their payment services to Stripe, who notoriously does extensive data collection above and beyond just KYC. And that "we dont have your payment information" is just the industry standard "we don't want to be responsible for securing your payment info" that virtually every online retailer has. There's nothing at all private about it, they just don't want to be responsible for it. They can still trivially trace payment back to your Cape account, including retroactively if their privacy stance ever changes, there's a court order, etc.
In terms of service itself, no one really cares to connect the SIM card in your phone to your identity. They track your location based on IMEI within the physical network, and sell that with data traffic association. But that's not Cape doing that, that's the network operators that own and run the towers (only 3 exist in the US: Verizon, AT&T, T-Mobile). That's identical to what every regional carrier does (they pay one of the 3 owners of infrastructure for the bulk network use and resell it to end-users). A random post-paid contract from a any regional carrier is functionally identical to the services of Cape. Except it cost 2x for Cape, and they brand it as "private".
GoogleFi isnt much different to a regional carrier, except they have one of the tech monopolies behind them and can force routing of near-infrastructure-level traffic thru servers they maintain as well. So they do manage to grab even more network-level data collection while still exposing you to all the unavoidable data collection of using any mobile networks.