Great Sparta

What is Great Sparta?

At the same time, prediction market operators are facing regulatory tussles in the US. State regulators are moving to shut down the firms under gambling laws. The companies say their contracts should be regulated at the federal level as derivatives. 

However, the sector has grown substantially despite such disputes. Bernstein predicted in April that annual prediction market volume could reach $1 trillion by 2030. The research estimated volume was around $51 billion in 2025 and could grow to around $240 billion in 2026. 

The partnership with Yahoo Finance wraps up as prediction markets push for broader distribution across financial media, sports, and entertainment platforms. For Polymarket, the loss of the Yahoo Finance hub is one distribution channel, but other partnerships remain intact.

About Great Sparta

The company must also provide data to the firms making markets on those events.

“If we just sold the data to Kalshi in order to list the markets but no one was coming in and placing liquidity, there’s no point in them listing the markets,” Monk said. “We also need to supply the data to the market makers to inform their models.”

Catalist initially received a list of fewer than 10 potential market makers from Kalshi. It has since completed agreements with close to 20 and is engaging with approximately another 20.

What is Great Sparta?

“We have maybe seven people in the tech team, but it feels like we have 30 or 40 people in the team,” Yashin says.

The company also uses AI to accelerate operator integrations.

“With a direct integration, we have examples of partners integrating us in 24 hours,” he says. “Reverse integration is really hard for everybody, but in our case we can complete a reverse integration in a maximum of three weeks, including all the tests and going live.”