Vanguard is a great option if you want an IRA comprised mainly of exchange-traded funds (ETFs) from Vanguard and others.
Consider Alto if you want To diversify your retirement assets with alternative investments. Alto CryptoIRA offers more than 150 coins, while Alto IRA offers alternative investments including private equity, securities in fine art, and other non-public securities and pre-IPO shares.
Vanguard
Self-Directed
AltoIRA
Self-Directed