Polymarket leads on the only live benchmark. Polymarket wins on Best prediction market API, ranked by live latency and uptime (200 ms vs 1.25 s).
Play-money prediction market with AMM-based binary and multiple-choice markets. Documented public API at 500 requests per minute per IP, bots explicitly welcome.
The largest crypto prediction market, settled on Polygon via UMA optimistic oracle. CLOB-style order book hosted on the Polymarket gateway with sub-second publish latency for live odds.
| Provider | Ramp added latency | Cold connect | Server reported data age |
|---|---|---|---|
| Manifold | 48 ms | 83 ms | 43 s |
| Polymarket | 5 ms | 6 ms | 0.0 s |
Ramp tiers stay well inside documented budgets where they exist, at most 7 percent of Polymarket's published book allowance, and every run aborts at the first sign of sustained errors. This benchmark measures throttle onset behaviour at polite request rates, not maximum venue throughput.
| Provider | API latency (price endpoint) | Uptime 24h | Uptime 7d | Cold connect |
|---|---|---|---|---|
| Manifold | 1.25 s | 100.0% | 99.5% | 83 ms |
| Polymarket | 200 ms | 100.0% | 100.0% | 6 ms |
Uptime here means our probes succeeded from three specific regions at a polite request rate. A venue can be up for us and degraded for you, especially during regional network incidents, and a brief blip between probe cycles can go unrecorded. Treat the panel as a measured signal, not a guarantee.
Manifold and Polymarket are compared on 2 shared OpenChainBench benchmarks. Polymarket leads on Best prediction market API, ranked by live latency and uptime. See the live table on this page for every metric.
On the Best prediction market API, ranked by live latency and uptime benchmark, Polymarket leads at 200 ms versus Manifold at 1.25 s. Live measurement is updated continuously by the OpenChainBench harness.
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.
Auto-generated pairs require: both providers in the same benchmark for seven consecutive days, at least 1000 samples per provider, observable third-party search demand, and a public /products/[slug] page on OCB. Editorially curated pairs (like this one) may publish early when search demand is high and data is accruing — panels with fewer than 100 samples are shown as provisional. The full pair ledger is versioned in the public repo.