Predictions .io launches free tools to compare odds across prediction market venues
Predictions .io has launched free tools that let users compare odds across prediction market venues. The platform tracks more than 9,700 markets across Kalshi, Polymarket, and Manifold in a single interface. It also offers free fee and odds calculators. The launch turns price comparison from a manual trader chore into an automated layer sitting above competing venues. Separately, Kalshi rolled out prediction markets tied to art auction prices, letting users trade on auction outcomes.
Odds comparison engines change how traders pick venues. Predictions .io strips away the friction of checking Kalshi, Polymarket, and Manifold separately, which means fees and liquidity gaps become visible and actionable in seconds. Platforms with worse pricing will leak volume to better-priced rivals faster than before.
That transparency rewards scale: larger venues with tighter spreads attract the marginal trade, while smaller markets bleed flow. Polymarket and Kalshi, the tool is a double edge. It can drive discovery, but it also commoditizes their edge if competitors consistently undercut them. Traders win first. Platforms that cannot match or beat displayed odds face steeper customer acquisition costs as comparison becomes the default behavior.