Compressed state engine
Compressed columnar indexes support queries over historical Solana data. Query speed depends on the workload and hardware.
Blockzilla
What the engine does.
Queries over chain memory
Queries run over the full history rather than a rolling window, so an answer can cite precedent and not only the present.
Security telemetry
FireWatch indexed capital flows and contract behaviour and published its alerts openly instead of keeping them private. Its live indexing is paused.