The closest example I can think of is using a proprietary hosted database versus a self hosted open source option, like Oracle vs Postgres. OpenAI and Anthropic are each individually privately valued over $1T and Oracle is currently valued at half that. They’re not worthless, but they’re severely overvalued.
Oracle's not a good comparison though, because it's getting valued as an AI compute provider as well as for its traditional business. At the end of 2021 Oracle's stock was about $100 (all-time-high in nominal terms at the time), its current ATH was October last year at $292.