TapeSim – Practice Reading the Tape
Native desktop app for tick-by-tick order book replay without broker risk.

Records every raw message and stamps it with nanosecond-precision receipt times so you can replay exact exchange traffic — nice for auditing or recreating subtle timing bugs. The product leans into 'give me the raw JSON, not some normalized blob' which is exactly what power users want, but it's currently Binance-focused and I want clearer guarantees on retention, ordering, and pricing before I bet production tooling on it.
Quant traders, crypto data researchers, algo developers, backend engineers who need reliable, raw exchange tick data
I spent enough weekends on this that I turned it into a service: Ticksupply https://ticksupply.com
You pick any stream — currently supporting Binance spot, more exchanges coming — order books, trades, klines, depth updates, whatever the exchange supports. Ticksupply records every message. When you want data, you export a date range as gzipped CSV: nanosecond receipt timestamp + the raw exchange JSON. No normalization, no reshaping. The format is exactly what the exchange sends, so you can replay it directly as if it were a live WebSocket feed.
1707523275537000000,{"e":"trade","E":1707523275537,"s":"BTCUSDT","t":3412345678,"p":"42856.10","q":"0.00100",...}
There's a free trial if you want to try it out. There's also an API available: https://docs.ticksupply.comWhat do others here use for this? Own recorder, Cryptofeed, commercial data vendor, something else?
Native desktop app for tick-by-tick order book replay without broker risk.
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