Synthesis

Synthesis is a professional-grade prediction market trading interface built to aggregate the two dominant prediction market venues — Polymarket and Kalshi — into a unified terminal. Founded in July 2025 and launched into public beta on December 29, 2025, the platform positions itself as "the most advanced prediction market interface" for traders who want speed, depth, and cross-market visibility in a single dashboard.

What It Is

Prediction markets let participants trade on the outcome of future events — elections, sports results, economic indicators, geopolitical developments. Rather than building another prediction market from scratch, Synthesis sits one layer above: it is an interface, not an exchange. Users trade directly on Polymarket (which settles on Polygon) and Kalshi (which operates under CFTC oversight and integrates with Solana), but they do so through Synthesis's tools rather than through either platform's native UI.

The Solana connection runs through Kalshi. Kalshi's on-chain infrastructure uses Solana, making Synthesis a functional part of the Solana ecosystem for anyone trading Kalshi markets. Users can access both Polymarket and Kalshi markets from the same session without switching between platforms or managing separate wallets for each venue.

Core Features

Copy Trading Synthesis allows users to mirror or invert the trades of any wallet address on Polymarket. Position sizing can be fixed dollar amounts, a set percentage of available balance, or a range-based rule. Inverting another trader's bets — going the opposite direction from a tracked wallet — is supported natively, giving contrarian strategies the same automated execution as straightforward copying.

Whale Tracking and Trader Watchlists The platform surfaces large-position movements in real time. Users can build watchlists of specific wallet addresses — whether known sharp traders or institutional accounts — and receive alerts when those wallets take meaningful positions. This intelligence layer is designed for traders who rely on reading order flow rather than independently forecasting outcomes.

Market Discovery and Curated Feeds Rather than requiring users to browse raw market listings, Synthesis provides recommendation feeds and personalized discovery based on a user's history and stated interests. Live news is surfaced alongside relevant markets, creating a feedback loop between breaking information and tradeable predictions. The platform aggregates data from live events to news sources, attempting to surface correlations that are not immediately obvious from prices alone.

Arbitrage Detection Cross-market arbitrage — finding the same underlying outcome priced differently on Polymarket versus Kalshi — is a core use case the platform explicitly supports. Synthesis identifies price discrepancies between venues and surfaces them as opportunities. Given that both Kalshi and Polymarket have significant but separate liquidity pools, the same event can carry meaningfully different implied probabilities on each platform.

Social and Community Layer The platform includes community features that let users share market insights and information. Synthesis describes a model where users can receive compensation for sharing relevant information around specific topics, though detailed mechanics of this system are not fully documented in available public sources.

Cross-Chain Deposits and Wallet Management Wallet security is handled through Privy, a third-party wallet infrastructure provider. Synthesis abstracts away the technical friction of multi-chain access: users can deposit from any supported chain and arrive inside the platform ready to trade, without manually bridging assets, switching networks, or interacting directly with smart contracts. A single unified wallet works across both supported market venues.

Developer Access The platform exposes an OpenAPI specification for developers who want programmatic access to its data or functionality, indicating an intention to support bots, automated strategies, and third-party integrations.

Team and Company

Synthesis was founded by Riley Cook, who serves as CEO. The company is small — LinkedIn lists 2 to 10 employees — and privately held. The Twitter account (@SynthesisTrade) launched in July 2025, contemporaneous with the company's founding date.

Market Context

The prediction market sector experienced a significant expansion beginning in 2024, driven by high-profile political events and growing mainstream awareness. By 2025, Kalshi and Polymarket collectively controlled an estimated 97.5% of prediction market trading activity, with combined annual volumes in the hundreds of billions of dollars. Synthesis entered this environment at a point of maximum attention, when sophisticated traders were actively seeking better tooling for navigating markets that had become liquid enough to warrant professional infrastructure.

The platform's proposition — serve traders who are already active on Polymarket and Kalshi, but need better discovery, monitoring, and execution tools — fills a gap that neither exchange addressed with its native interface. Polymarket and Kalshi each built their UIs for retail access; Synthesis targets the layer above, where position sizing, wallet tracking, and cross-market price comparison matter.

Status

As of September 2026, Synthesis is active. The website resolves, the documentation is available, and the Twitter account posts regularly on current prediction market opportunities. The platform launched its public beta in late December 2025 and appears to be in ongoing development. No token issuance has been announced or identified.