Polymarket alternatives
Polymarket alternatives include Kalshi, Polymarket's own US exchange, ForecastEx, PredictIt, and the no-money platforms Manifold and Metaculus. US users in particular look for one, because Polymarket's docs list the United States as close-only on its international exchange.
The short answer: Kalshi is a CFTC-regulated alternative with a full public API, which is why most bots in this directory support it. Polymarket US is a separate CFTC-designated exchange. ForecastEx is reached through Interactive Brokers accounts. If you only want to forecast without money, Manifold and Metaculus are free.
Last updated .
Platforms compared
| Platform | Structure | Money | Source |
|---|---|---|---|
| Kalshi | CFTC-regulated exchange (DCM) | US dollars | Kalshi Help: How is Kalshi regulated? ↗ |
| Polymarket US | CFTC-designated exchange run by QCX LLC | US dollars (regulated US venue) | CFTC: QCX LLC d/b/a Polymarket US (DCM filing) ↗ |
| ForecastEx (via Interactive Brokers) | CFTC-designated exchange and clearinghouse since June 2024 | US dollars; IBKR lists $0.00 commission + $0.01 exchange fee per contract | CFTC: ForecastEx LLC (DCM filing) ↗ · Interactive Brokers: Prediction markets pricing ↗ |
| PredictIt | Not-for-profit market under CFTC no-action relief; per-contract cap raised to $3,500 in 2025 | US dollars | CFTC Letter 25-20 (PredictIt) ↗ |
| Manifold | Play-money market; sweepstakes cash ended in 2025 | Mana (no cash value) | Manifold: Focusing on Mana, ending sweepstakes ↗ |
| Metaculus | Forecasting platform; no money is traded | Points and tournament prizes | Metaculus ↗ |
Bots for the top alternative: Kalshi trading bots · details in Kalshi vs Polymarket · Kalshi alternatives
Listed projects compared (6)
From this directory. GitHub stars and update dates as of Oct 23, 2026.
| Project | Platforms | Tools | Difficulty | GitHub stars | Repo updated |
|---|---|---|---|---|---|
| CloddsBot autonomous trading agent | Kalshi & Polymarket | TypeScript, LLMs | advanced | 2,969 | Oct 2, 2026 |
| PMXT: 'CCXT for prediction markets' | Kalshi & Polymarket | TypeScript | intermediate | 2,170 | Sep 30, 2026 |
| Rust copy-trading toolkit | Kalshi & Polymarket | Rust | intermediate | 480 | Sep 7, 2026 |
| Event-driven backtest engine for binary prediction markets | Kalshi & Polymarket | Python, Streamlit, Parquet | intermediate | 0 | May 17, 2026 |
| Alma forecasting bot (Metaculus medal) | other (Metaculus) | LLM forecasting agent | advanced | — | — |
| Voulai plain-English agents on Polymarket | Polymarket | Voulai, OutLayer, NEAR Intents | beginner | — | — |
FAQ
What is the best Polymarket alternative in the USA?
Kalshi is a CFTC-regulated exchange with a full public API. Polymarket US and ForecastEx are also CFTC-designated. PredictIt runs under CFTC no-action relief with a per-contract cap.
Is Polymarket US the same as Polymarket?
No. Polymarket US is a separate CFTC-designated exchange run by QCX LLC. Polymarket's international exchange settles on Polygon and is close-only for US users.
Is there a free Polymarket alternative?
Manifold uses play money (Mana) and Metaculus uses points, so neither needs real money.
Do Polymarket bots work on Kalshi?
Not directly; the APIs differ. Unified libraries like pmxt and multi-venue agents listed above cover both.
Not financial advice. Listing is not an endorsement, and we have not checked any profit claims. Read the code before you give any tool an API key or wallet key.
Related: Polymarket trading bots · Kalshi vs Polymarket · Kalshi alternatives · Prediction market APIs · All 66 projects
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