Predictefy vs PolyBackTest: Best Alternative (2026)
The Short Answer
Predictefy is the best PolyBackTest alternative when your strategy needs to reach beyond one market family, or reach a live order. PolyBackTest is a historical dataset focused on Polymarket's Up/Down markets for BTC and ETH, built for backtesting, with no live trading. Predictefy covers 16 venues and every market type they list, and takes a strategy the whole way: history replay and a Python backtest package, paper trading at 0 credits, then live client-signed execution, in one integration. The free plan carries 25,000 credits a month.
Predictefy vs PolyBackTest: Quick Comparison
- Market scope: Predictefy 16 venues, every market type. PolyBackTest Polymarket Up/Down markets for BTC and ETH.
- Backtesting: Predictefy's Python
predictefy.backtestpackage merges ticks, trades and candles into one ordered event stream. - Paper trading: Predictefy includes it on every plan at 0 credits.
- Live trading: Predictefy supports client-signed execution on every plan. PolyBackTest is historical only.
- Live data: Predictefy serves live markets and order books for all 16 venues alongside history.
- Cross-venue: Predictefy's arbitrage and price-gap queries compare prices across venues.
PolyBackTest details on this page are quoted from its own website as of September 2026. Predictefy figures come from its public documentation.
What does PolyBackTest cover?
One market family on one venue, historically.
PolyBackTest describes its dataset as Polymarket Up/Down prediction markets, BTC and ETH pairs, across 5-minute to 24-hour timeframes, with order book snapshots and Chainlink reference prices, served over a REST API. It is built around the idea "know your edge before you bet it," and its site describes backtesting rather than live execution.
That is a deliberate specialization. It also defines the boundary: a strategy on an election market, a sports market, a Kalshi economic contract, or any venue other than Polymarket sits outside it, and so does the step from a tested strategy to a live order.
Why is Predictefy the best PolyBackTest alternative?
Every venue, every market type. Predictefy serves 16 venues: Gemini, Hyperliquid, Kalshi, Limitless, Myriad, Novig, Opinion, Pascal, Polymarket, Polymarket US, Pred, Predict.fun, PredictStreet, Rain, SX Bet and XO, across politics, economics, sports, crypto and more. A strategy is not confined to the market family a dataset happened to capture.
The whole path from idea to order. A backtest answers whether an edge existed. Predictefy lets you replay history, then run the same logic as paper trades at 0 credits against live books, then send real client-signed orders, without switching providers at each step.
History and live data from one source. The prices you backtest against and the prices you trade against come from the same normalized schema, so there is no reconciliation gap between the dataset and the market.
How do you backtest a strategy on Predictefy?
With history replay and the Python backtest package.
GET /v1/history/replay returns NDJSON pages of top-of-book ticks, printed trades or stored candles for a single outcome, up to 20,000 rows a page over a window of up to 31 days, at 5 credits a page. It accepts the canonical outcome id or the venue's native id. The Python SDK's predictefy.backtest package pages through replay and merges the kinds into one ordered event stream for your strategy to consume.
curl -s "https://data.predictefy.com/v1/history/replay?venue=polymarket&outcomeId=OUTCOME_ID&kind=tob&since=2026-08-01T00:00:00Z&until=2026-08-08T00:00:00Z&limit=5000" \
-H "Authorization: Bearer pk_live_YOUR_KEY"A week of top-of-book ticks for one outcome, returned as NDJSON. Change venue and outcomeId and the same call replays a Kalshi contract, a Limitless market or an SX Bet line. History replay is available from Builder, with 12 months of history, and unlimited history from Pro.
How do the two compare side by side?
| Predictefy | PolyBackTest | |
|---|---|---|
| Venues | 16 | Polymarket |
| Market types | All listed markets | BTC and ETH Up/Down |
| Live market data and order books | All 16 venues | Continuous capture of its markets |
| Paper trading | Every plan, 0 credits | Not described |
| Live trading | Client-signed, every plan | Historical only |
| Cross-venue arbitrage | Priced endpoints | Not described |
What does backtesting cost on each?
Both let you start free. The difference is what the plan covers once the backtest is done.
| Predictefy | PolyBackTest | |
|---|---|---|
| Start free | Yes, 25,000 credits a month | Yes, no card required |
| History replay | Builder, $48.88: 12 months. Pro, $149: unlimited | Free tier and paid plans |
| The same plan also funds | Paper trading, live trading and live data across 16 venues | Historical data |
History reads cost 5 credits a query and replay 5 credits a page. On Predictefy the same plan that funds the backtest also funds paper trading and the live orders that follow, so the cost of taking a strategy from idea to market is one line item rather than several.
Which should you use?
Predictefy, for any strategy you intend to trade. Sixteen venues and every market type against one market family on one venue, a backtest package, free paper trading and live execution in the same integration, and history drawn from the same source as the live prices you will trade against. PolyBackTest is a focused dataset for one corner of Polymarket; Predictefy is where a tested strategy goes live.
Frequently Asked Questions
What is the best PolyBackTest alternative?
Predictefy is the best PolyBackTest alternative for strategies you intend to trade. It covers 16 venues and every market type rather than Polymarket's BTC and ETH Up/Down markets alone, and takes a strategy from history replay through free paper trading to live client-signed execution in one integration.
What markets does PolyBackTest cover?
PolyBackTest focuses on Polymarket's Up/Down prediction markets for BTC and ETH, across 5-minute to 24-hour timeframes. Predictefy covers every market type listed across 16 venues, including politics, economics, sports and crypto on Kalshi, Polymarket, Limitless, SX Bet, Hyperliquid and more.
How do you backtest a prediction market strategy?
Replay history, then test against live books before risking capital. Predictefy's history replay returns ticks, trades and candles per outcome, the Python predictefy.backtest package merges them into one event stream, and paper trading at 0 credits runs the same logic against live books.
Can you trade live after backtesting on PolyBackTest?
PolyBackTest describes historical data and backtesting, not live execution. Predictefy supports live client-signed trading on every plan, so the same integration that ran your backtest can place real orders: built server side, signed in your own process and relayed, with keys never leaving your control.
How much prediction market history does Predictefy offer?
Predictefy's free plan reaches back seven days, Builder carries 12 months with history replay, and Pro and Enterprise carry unlimited history. Each replay call returns up to 20,000 rows over a window of up to 31 days, metered at 5 credits a page.