Where it came from
Casa Inc. is a Delaware corporation incorporated in 2016, per the Form D it filed with the US Securities and Exchange Commission in March 2018. That filing lists Jeremy Welch as executive officer and director and gives a Charleston, South Carolina address. The company's current terms of service give a Denver, Colorado address.
Casa's own blog describes Nick Neuman as "co-founder and CEO of Casa", noting that "before assuming the CEO role, he spearheaded development as Head of Product". Jameson Lopp's blog profile on the same site describes him as "co-founder and Chief Security Officer of Casa".
What it built
The product is a multi-key setup where no single party can move funds alone. The customer holds keys on their own devices, Casa holds one, and a spend needs a quorum. That is a different bargain from both an exchange and a lone hardware wallet: the exchange leaves you nothing, the lone wallet leaves you everything including the single point of failure. Casa's version keeps the customer non-custodial while giving them somewhere to call when a key is lost.
Around that sit the parts that are actually the hard problem: recovery when a key breaks, and inheritance when the holder dies. Casa also sells stablecoin support alongside Bitcoin, and the buy and sell function is provided by Zero Hash rather than by Casa itself. Casa Financial, LLC is registered with the US Financial Crimes Enforcement Network as a money services business, and the company publishes a SOC 2 Type II report.
What it changed
Casa put a support number on self-custody. Before it, the honest answer to "what if I lose the seed" was that there is no answer, and that answer kept a lot of people on exchanges. A quorum you can rebuild after losing one key is a different risk profile, paid for with a subscription and with a third party knowing you exist. That is the trade, and it is worth naming plainly. Listing here is not endorsement.