Head to head
Every other page here narrows a field. These start from a field already narrowed — two or three named products a reader is stuck between — and go deep on the differences a category listing cannot show.
Adjacent vs DepthFeed vs Predexon: what a cross-venue data API sells that the venues give away
Every venue publishes a free API. Three aggregators, three honest reasons to pay one anyway, and which free tier runs out first, in comparable units.
Next to Data APIs3 productsUpdated
Metaculus vs Good Judgment Open vs Manifold: which score you are chasing
Three free platforms, three formulas — a log-based peer score, a relative Brier against one crowd, and profit in a currency that cannot leave the site.
Next to Forecasting3 productsUpdated
Polymarket vs Limitless vs Myriad: who decides, and what the fee is a percentage of
Three offshore venues with three resolution authorities — a token-holder vote, a price feed, a team — and three fee units that do not mean the same thing.
Next to Venues3 productsUpdated
py-clob-client vs polymarket-client vs PMXT vs CCXT: which Python client to write against Polymarket
One archived, one official, two multi-venue abstractions. Which to write against, what the abstraction removes, and where each one keeps your signing key.
Next to Clients & Bots4 productsUpdated
Convexly vs OrcaLayer vs Airavat vs Polysights vs Predicts.guru: who publishes the rule behind the label
Five readers of one public record. Two publish the exclusion rule, one publishes its own failed tests, and their market counts differ by a factor of thirteen.
Next to Analytics5 productsUpdated
Kalshi vs Polymarket US vs Robinhood: one of these three is not an exchange
Robinhood is a broker routing to three exchanges, so the same contract costs more there. Kalshi and Polymarket US are two separate exchanges, not one brand.
Next to Venues3 productsUpdated