Best Prediction Market Platform Scripts to Create a Platform Like Polymarket or Kalshi

Two companies. One niche. A combined valuation of over $40 billion.

Kalshi recently raised $1 billion at a $22 billion valuation.

Polymarket is reportedly in talks to raise at a $20 billion valuation.

The parent company of the New York Stock Exchange put $2 billion into Polymarket. Even the CEOs of Kalshi and Polymarket, bitter rivals in every other sense, are co-investing in the same new venture firm that plans to fund 20 prediction market startups over the next two years.

When competing founders start writing checks into the same fund, the signal is obvious. It's an industry.

And right now, there is still room to build in it.

What Is a Prediction Market Platform?

A prediction market platform lets users trade on the outcome of real-world events. That goes like, Events Will this candidate win? Will inflation hit 4% this quarter? Will this team win the championship?

Each market presents a Yes/No contract. The price of that contract reflects the probability the crowd assigns to the outcome. A Yes contract trading at $0.68 means traders collectively believe there's a 68% chance the event happens. When the event resolves, winners get paid out. The platform earns a cut of every trade.

Polymarket vs Kalshi: What You're Choosing Between

Most entrepreneurs may think Polymarket and Kalshi are the same thing. They're not. They're built on completely different foundations.

Polymarket is a decentralized, crypto-native prediction market. It runs on the Polygon blockchain. Users connect a crypto wallet, trade using USDC stablecoins, and every settlement executes through audited smart contracts.

Kalshi operates more like a regulated financial exchange. Users fund accounts with regular dollars. The platform is CFTC-approved. Trades settle through a centralized order book.

As these two platforms are completely different models, it's your job as a founder to decide which user, the crypto trader or the fiat-first retail user, you're targeting.

Why Build the Prediction Platform Now?

The most accurate answer is the TIMING.

Polymarket and Kalshi together accounted for approximately 97.5% of total prediction market trading volume in 2025. That number sounds like a closed door. It's the opposite. Two platforms cannot serve everyone. The remaining share and the underserved categories represent a genuine opening for well-positioned builders.

As per the latest stats, the technology and science markets grew 1,637% year-over-year, the economics markets followed at +905%, and politics grew only 43%.

Most experts will tell you that prediction markets blew up because of elections. That's the story. The data tells a different story. The real growth is in tech, economics, science, and sports categories that a niche platform could dominate without ever touching political markets at all.

What Is a Polymarket Clone Script?

A Polymarket clone script is pre-built software that replicates how Polymarket works, the smart contract layer, the trading interface, the AMM-based pricing, the wallet integration, and the admin tools packaged as a customizable product that a startup can launch without building any of that from scratch.

A clone script can get an MVP-ready platform live in a few weeks, reducing development costs from $150,000-$300,000 to a fraction of that.

The Core Features of a Polymarket Clone

Smart contracts: Polygon is the chain Polymarket itself uses. Low gas fees, fast transactions, broad wallet support. Every trade, market creation, and payout runs through audited smart contracts without intermediaries.

Oracle integration: The oracle is what tells your smart contracts who won. UMA Protocol and Chainlink are the standard choices. This is what makes automated, trustless settlement possible.

AMM (Automated Market Maker): Instead of requiring a counterparty for every trade, an AMM uses a liquidity pool to price markets dynamically. This means your platform can function even before it has a large user base.

Web3 wallet login: MetaMask, WalletConnect, and similar wallets are the entry point for users. No email, no password, just a wallet connection. This is standard on any serious crypto prediction market platform.

Multi-chain support: Better scripts support Ethereum, BSC, and Polygon. This matters for users who have assets spread across different networks.

Admin dashboard: You need to create markets, set fees, manage liquidity, and resolve disputes.

What Is a Kalshi Clone Script?

A Kalshi clone script replicates the infrastructure of a regulated, centralized prediction market. Instead of an AMM, it uses an order book where buyers place bids, sellers place asks, and the matching engine pairs them in real time. A Kalshi clone script includes an order book system, fiat payment integrations, and compliance-ready modules.

The Core Features of a Kalshi clone script:

High-throughput matching engine: The matching engine has to process orders fast and accurately, especially during high-volume events. Sub-second execution is the benchmark.

Fiat payment integration: Unlike crypto platforms, Kalshi-style platforms accept bank transfers and cards. Your script should support payment gateway integration from day one.

KYC/AML compliance modules: Built-in identity verification with providers like Jumio or Onfido. In a regulated environment, this isn't optional. Skipping it means legal exposure.

Free-to-play (F2P) mode: Several Kalshi clone scripts now include this as a standard feature. It's underused and underrated.

Multi-category market support: Politics, economics, sports, crypto. Your admin panel should let you create and close any category without touching the codebase.

Polymarket Clone vs Kalshi Clone: Which One Is Best for You?

The answer to this question depends on three things: users, money handling, and regulations.

Choose a Polymarket clone script if your users are already in crypto. They have wallets, understand USDC, and don’t need a KYC process. The platform will become globally accessible without needing payment infrastructure in every country you serve.

Select the Kalshi clone script if you're targeting non-crypto users, retail traders, sports fans, and finance-curious people. These users want to deposit dollars and get started. They want a platform that feels like a brokerage.

A growing number of scripts now support a hybrid model centralized backend with optional on-chain settlement. This is becoming the preferred architecture for platforms that want to serve both audiences.

What Does Prediction Market Platform Development Cost?

Development cost depends on your chosen model, the prediction platform development company, the level of customization, and whether you want mobile apps alongside the web platform.

A basic MVP one market category, either crypto or fiat payments, core trading features and an admin panel typically runs between $15,000 and $25,000 with a clone script.

A mid-tier platform with multiple categories, mobile apps, KYC integration, liquidity management, and analytics usually falls between $30,000 and $60,000.

A full-scale platform with custom smart contracts, independent security audits, multi-chain support, compliance infrastructure, and enterprise-grade performance can exceed $100,000, still well below the $300,000+ cost of building from scratch.

How the Revenue Works on Prediction Market

Trading fees are the engine. Most prediction market platforms charge between 0.5% and 2% on every executed trade. At scale, this adds up fast. Kalshi crossed $1 billion in annualized revenue on trading fees alone.

Beyond trading fees, the revenue model includes market creation fees for organizations that want to list custom markets, withdrawal fees, liquidity provider spreads, and premium analytics products that institutions and media companies will pay for.

How to Build the Prediction Market Platform?

First, decide whether it is centralized or decentralized. That choice determines your tech stack, compliance path, and target user. The second decision is your niche. Trying to compete with Kalshi and Polymarket on politics and sports is a difficult route.

Building for cricket outcomes in South Asia, or tech event contracts for a developer audience, or economic forecasts for an institutional user base, these are markets the big two don't serve well.

The clone script is the foundation. How you customize it uniquely is what makes the platform work.

The pitch document for 5c(c) Capital, the new prediction market VC fund backed by both Kalshi and Polymarket's CEOs, describes prediction markets as a "generational investment opportunity."

The people closest to this industry, the ones running the top platforms, are putting their own money into the infrastructure around it. That tells you something. The time to build is NOW.