In theory there's none... DuckDB is like Sqlite, it's a file, but in this case it's 100% wasm so theres zero interaction with any "server", it's all on Browser.

In theory there's none... DuckDB is like Sqlite, it's a file, but in this case it's 100% wasm so theres zero interaction with any "server", it's all on Browser. One example of DuckDB in server is mother duck... It makes .duckdb files "available" on the cloud.