// COMPARE
outcometick vs PMData
What outcometick provides, row by row, beside what the PMData site states for the same thing as of 2026-11-03. Where their pages do not say, the cell says so. Prices are left out: both sides change them.
| outcometick | PMData | |
|---|---|---|
| Venues | Polymarket, Predict.fun | Polymarket, Predict.fun |
| Chainlink settlement streams | Yes: Chainlink price and TWAP streams, the feeds the Up/Down markets resolve on | Yes: Chainlink price and TWAP streams |
| Strike and outcome per market | Yes: strike and settled outcome per market, in the same archive as the order books | Resolution events carried in the order-book stream; strike not stated |
| Public settlement audit | Yes: markets recomputed from the archived settlement stream and compared with the official outcome, per-day verdicts downloadable | Not stated on the pages checked |
| Per-file checksum | SHA-256 and byte length listed per file | Not stated on the pages checked |
| File formats | Gzipped JSON Lines and CSV, plus Parquet | Parquet; daily ZIP downloads |
| Access | REST API, Python and Node SDKs, ot CLI, MCP server | HTTP API |
| Try before paying | A public sample day, no key or sign-up needed | Order-book sample |
| Backtest framework | Open-source engine for Python and Node: taker fees, fills walked through book depth, a queue for resting orders, markouts in the report; replays the sample day locally | Works with the open-source hftbacktest framework |
| Hosted backtesting | Yes: your Python or Node strategy runs in a sealed sandbox against the archive; the same engine replays locally | Not stated on the pages checked |
PMData column checked 2026-11-03, from: pmdata.dev, pmdata.dev/docs/historical-data-details/polymarket, pmdata.dev/docs/historical-data-details/predict-fun, pmdata.dev/docs/historical-data-details/chainlink. Their site is the authority; tell us if a cell has gone stale.
Check it yourself
Every cell in our column can be checked before buying a key: the public sample day is one real day in the same formats as the paid archive, and the file schemas list every field.