Prediction market API rate limits, tested with a daily ramp
TradingKalshi
Trails321 ms
- p99
- 560 ms
- rank
- #3
- samples
- 51,814
PredictIt
No data in window
Kalshi vs PredictIt
Kalshi vs PredictIt on 2 shared OpenChainBench benchmarks, awaiting live measurements.
Kalshi
CFTC-regulated US prediction market exchange. REST trade API (trade-api/v2) with documented per-tier rate limits; the market data WebSocket requires authentication.
PredictIt
CFTC-regulated US political prediction market. Real-money contracts on US elections, legislation and political events. REST API returns market data without authentication; rate-limited to 5 requests per minute.
Side by side measurements
Best prediction market API, ranked by live latency and uptime
TradingKalshi
Trails326 ms
- p99
- 539 ms
- rank
- #3
- samples
- 51,816
PredictIt
No data in window
Frequently asked questions
Kalshi vs PredictIt: which one is better?
Kalshi and PredictIt are compared on 2 shared OpenChainBench benchmarks. See the live table on this page for every metric.
How is the Kalshi vs PredictIt comparison measured?
Every benchmark on this page uses the same open methodology, published at https://openchainbench.com/methodology. Data is CC-BY-4.0. Measurement harnesses are MIT-licensed.
How this pair was selected
A pair is published when all four conditions hold. Both providers run in the same OpenChainBench benchmark for at least seven consecutive days. Each provider has at least 1000 samples in the measurement window. The head to head query has observable third party search demand. Both providers have a public /products/[slug] page on OCB. The full pair ledger is versioned in the public repo so the methodology is externally verifiable.