(And as someone who's worked as the first employee of a startup, I can tell you it was while before we were able to get a CFO.)
Ultimately, people will have to accept that SVB wasn't as trustworthy of a guardian as some other banks. It appears that people were pushed into using SVB, because it was part of the VC ecosystem.
It's an individual CFO or Founder's decision as to whether to insure deposits or not, but claiming ignorance of the possibility is going to be ignored by a lot of others.
[1] fdic.gov/resources/regulations/federal-register-publications/2010/10c20ad66rates.pdf
Here is the complete list of DIF-covered banks: https://www.difxs.com/DIF/DIFmemberbanks.aspx
It's a short list, they're small banks, and they all have addresses in Massachusetts. Wells Fargo and Bank of America, for example, are not on the list.
The normal method for this insurance is to call an insurance company and ask for excess deposit insurance. This should be your first step. But, it seems very strange to me that you are beligerently asking people on the internet for financial information that you don't appear to need.
1. Understand How a Depositor Bond Works [1]
2. Depositor bonds for FDIC-insured deposit accounts [2]
3. Excess Deposit Guarantee Surety Bond [3]
4. Bond Penalty: Based on Coverage Requested Excess FDIC Limits [4]
5. Hello old friend – The reappearance of excess deposit bonds [5]
Here is the summary copied from the first link, in case you don't want to load the link from here or from Google. In summary, the Depositor Bond provides a third
party guarantee (from the insurance company who
is called the Surety) that deposits will in fact
be returned to the depositor. Depositor bonds
are designed to be “Excess FDIC Insurance
Coverage” and coverage begins at the point where
the $250,000 FDIC insurance obligation ends. [1]
[1] https://www.depositorbonds.com/understand-how-a-depositor-bo...[2] https://www.travelers.com/iw-documents/surety-bond/59375-dep...
[3] https://surety1.com/bond_info/excess-deposit-guarantee-suret...
[4] https://suretyone.com/bank-depository-bond
[5] https://www.cuinsight.com/hello-old-friend-the-reappearance-...
The other links say similar things. This is something banks can buy, to provide extra coverage for their customers.
People here have been arguing that SVB's customers were negligent by not purchasing their own third-party insurance. I think it's reasonable to ask them to support that argument, even if I'm not personally in the market. Supplemental insurance like that still does not appear to be available.
Take a look at https://www.forbes.com/advisor/banking/ways-to-insure-excess.... It explains several methods, including extra deposit insurance from CDARS, MaxSafe, Depositors Insurance Fund, etc. It also explains cash management accounts, credit union overflow, using multiple banks, and so forth. I can't help but think a good CFO or comptroller would be well aware of these.