Streaming Solana Data Without a Node - Agave logsSubscribe, programSubscribe and accountSubscribe vs Bitquery Kafka Streams

Say you want to know when someone buys a token on Pump.fun. On a Solana node, the closest thing to that is logsSubscribe, which hands you a signature and a list of log strings. Turning those strings into “wallet X bought 1.2M of mint Y for 3.4 SOL” takes a second RPC call, a Borsh decoder you wrote, and a metadata lookup for the symbol.