Prediction market API rate limits, tested with a daily ramp
TradingKalshi
Trails322 ms
- p99
- 560 ms
- rank
- #3
- samples
- 51,814
Smarkets
No data in window
Kalshi vs Smarkets
Kalshi vs Smarkets 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.
Smarkets
UK-regulated peer-to-peer betting exchange with a public CLOB REST API. Covers political, sports and entertainment markets. No authentication required for market data including full order book quotes.
Side by side measurements
Best prediction market API, ranked by live latency and uptime
TradingKalshi
Trails326 ms
- p99
- 538 ms
- rank
- #3
- samples
- 51,816
Smarkets
No data in window
Frequently asked questions
Kalshi vs Smarkets: which one is better?
Kalshi and Smarkets are compared on 2 shared OpenChainBench benchmarks. See the live table on this page for every metric.
How is the Kalshi vs Smarkets 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.