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Polymarket data providers, compared

Marketlens records tick level L2 order books for every recurring Polymarket market type: structured products, crypto up or down, live sports and esports, daily weather, and macro markets, plus standalone events like the 2028 election. That is 1,236,201 markets so far, served through a REST API and an open source Python SDK. Backtesting, bulk Parquet exports, and an MCP server are built in. Full archive from March 2026 on Pro and Scale, markets open in the last 7 days on the free tier.

Last updated August 3, 2026

Competitor details as of August 2026, per each vendor's public site.

marketlens

MarketsCrypto, sports, esports, weather, macro, standalone eventsHistoryFree: markets open in the last 7 days; Pro: full archive since March 2026Order bookMillisecond deltas, exact replayFree tierYes, 7-day history, 2M rows one timePaid from$39/mo

polymarketdata.co

MarketsMultiple categoriesHistory1 to 3 months; unlimited at $360/moOrder book1-minute snapshotsFree tierYes, no order booksPaid from$60/mo

depthfeed.com

MarketsCrypto up/down on 4 venues; sports on top tierHistory7 to 90 days; archive at $249/moOrder bookEvent-driven recordingFree tierYes, 7-day historyPaid from$29/mo

polyhistorical.com

MarketsBTC, ETH, SOL up/down onlyHistoryRolling 31 to 60 daysOrder book300ms snapshotsFree tierYes, limited BTCPaid from$17/mo

pmdata.dev

MarketsCrypto up/down onlyHistoryFull archive since Feb 2026Order bookTick-by-tick updatesFree tierTrial, capped downloadsPaid from$49/mo

polybacktest.com

MarketsBTC, ETH, SOL up/down; some equity indicesHistoryRolling 31 days; add-ons to 120Order bookSub-second snapshotsFree tierYes, recent BTC marketsPaid from$19.90/mo

polytest.io

MarketsBTC, ETH, SOL up/down onlyHistory14 days; full history on ProOrder bookSub-second, 8 levelsFree tierYes, 30 recent marketsPaid from$17/mo

telonex.io

MarketsPolymarket trades, quotes, books, on-chain fills; Predict.fun; Binance spotHistoryPolymarket books since Oct 2025, trades and fills further backOrder bookTick-level Parquet filesFree tier5 file downloadsPaid from$99/mo

polyorderbooks.com

MarketsPolymarket crypto up/down, 8 coinsHistory3 days free; 30 to 120 day windows paidOrder book1-second captureFree tierYes, 3 days, 1,000 req/dayPaid from$19/mo

predexon.com

MarketsPolymarket and KalshiHistoryTrades and prices since 2020; books since Jan 2026Order bookTick-level replayFree tierYes, 1 req/s, 1,000 premium req/moPaid from$49/mo

resolvedmarkets.com

Markets7 crypto coins; sports, weather, economics on ScaleHistoryUnlimited on every planOrder bookAbout 20 Hz snapshots on cryptoFree tierYes, 5,000 credits/moPaid from$17/mo

tardis.dev

MarketsA subset of Polymarket markets, not the full catalogHistorySince May 25, 2026Order bookIncremental L2 updates; 5 and 25 level snapshotsFree tierFirst day of each month, no keyPaid from$350/mo

Most alternatives cover crypto up or down markets only and cap history to a rolling window. Prices are each vendor's cheapest paid plan.

Which provider covers the most Polymarket market types?

Every recurring Polymarket market type is in the Marketlens archive at full L2 depth: multi strike and barrier products, crypto up or down from 5 minutes to daily, per game sports and esports, daily weather by city, and macro markets. Each series recurs on a schedule, so there are sequential instances to backtest against. Standalone events that sustain real trading volume, elections and geopolitics included, are collected as well. Most other providers cover crypto up or down only. polymarketdata.co spans more categories, but at 1 minute granularity and with order books on paid plans only.

Which provider has the most granular Polymarket order book data?

The finest capture is change level: every price change stored with a millisecond timestamp, which is how Marketlens records books. The book at any instant reconstructs exactly, level by level. pmdata.dev also captures tick by tick updates, and depthfeed.com records on every book change; both cover crypto up or down only. polyhistorical.com samples at 300ms, polybacktest.com and polytest.io at sub second intervals, and polymarketdata.co at 1 minute intervals.

Sampling misses what happens between samples. That is where queue position, fleeting liquidity, and slippage live. Change level capture does not miss it. Details in the order book API docs.

Which providers keep full history?

Most alternatives cap history to a rolling window: 31 days at polybacktest.com, 31 to 60 days at polyhistorical.com, 1 to 3 months at polymarketdata.co, 7 to 90 days at depthfeed.com, and 14 days on polytest.io's entry plan. Marketlens keeps a full archive from March 2026 onward, and Pro and Scale can query all of it; the free tier reads markets open in the last 7 days. pmdata.dev also keeps a full archive for its crypto coverage. For complete pulls, Marketlens offers bulk Parquet downloads.

Which Polymarket backtesting tool is most realistic?

The most realistic replays are order level, which is what the open source Marketlens SDK does. It ships two modes. Alpha replays one bar per market and trades to target weights, for slow signals over long windows. Execution replays order books tick by tick and fills orders against real depth, with FIFO queue priority, latency, slippage, and Polymarket fees.

Elsewhere, depthfeed.com has an in browser Backtest Lab, polyhistorical.com a strategy replay with an AI backtest agent on higher tiers, polybacktest.com an AI agent that writes strategy code, and pmdata.dev integrates with hftbacktest. polymarketdata.co publishes none. Marketlens also ships an MCP server, so agents like Claude Code and Cursor can query data and run backtests directly; it is the only MCP server here that runs backtests.

Recommendations

Which provider should you pick?

Every market type, millisecond books, realistic backtesting, AI agents

marketlens.trade. Tick-level books across structured, crypto, sports, esports, and weather markets plus standalone events, Alpha and Execution backtest modes in an open-source SDK, bulk Parquet exports, an MCP server, and a free tier with full API access to markets open in the last 7 days.

1-minute books from before March 2026

polymarketdata.co. Snapshots back to August 2025 across multiple categories, on the $360/mo Ultra plan.

In-browser backtesting for crypto up/down

depthfeed.com. Backtest Lab and paper trading on top of event-driven book recording, from $29/mo.

Cheapest crypto-only snapshots

polyhistorical.com. 300ms snapshots for BTC, ETH, and SOL up/down markets at $17/mo, rolling 31 to 60 day history.

An hftbacktest workflow

pmdata.dev. Parquet downloads built to feed hftbacktest, from $49/mo.

AI-written strategies in the browser

polybacktest.com. An agent generates and runs strategy code over its crypto up/down data; the AI plan is $35/mo.

Per provider

Looking at one provider in particular?

Marketlens vs polymarketdata.coMultiple categories · from $60/moMarketlens vs depthfeed.comCrypto up/down on 4 venues; sports on top tier · from $29/moMarketlens vs polyhistorical.comBTC, ETH, SOL up/down only · from $17/moMarketlens vs pmdata.devCrypto up/down only · from $49/moMarketlens vs polybacktest.comBTC, ETH, SOL up/down; some equity indices · from $19.90/moMarketlens vs polytest.ioBTC, ETH, SOL up/down only · from $17/moMarketlens vs telonex.ioPolymarket trades, quotes, books, on-chain fills; Predict.fun; Binance spot · from $99/moMarketlens vs polyorderbooks.comPolymarket crypto up/down, 8 coins · from $19/moMarketlens vs predexon.comPolymarket and Kalshi · from $49/moMarketlens vs resolvedmarkets.com7 crypto coins; sports, weather, economics on Scale · from $17/moMarketlens vs tardis.devA subset of Polymarket markets, not the full catalog · from $350/mo

FAQ

Common questions

How far back does Polymarket historical data go?

Order book history on Marketlens starts in March 2026 and grows continuously. It is a full archive, not a rolling window, and Pro and Scale can query all of it. The free tier reads markets open in the last 7 days.

Where can I download Polymarket order book data?

Bulk Parquet downloads of order book snapshots and deltas, trades, and candles are served through the Marketlens REST API and Python SDK, with a free tier covering markets open in the last 7 days and 2M rows one time. pmdata.dev serves Parquet downloads for crypto up/down markets. See marketlens.trade/docs/exports.

What is the best Polymarket backtesting tool?

The most realistic engine is in the open-source Marketlens SDK, with two modes: Alpha replays one bar per market for signal research over long windows, and Execution replays order books tick by tick with FIFO queue priority, latency, slippage, and Polymarket fees. depthfeed.com has an in-browser Backtest Lab, polybacktest.com an AI strategy agent, polyhistorical.com an AI backtest agent on higher tiers, and pmdata.dev integrates with hftbacktest.

Which Polymarket data provider is the cheapest?

As of August 2026, polyhistorical.com and polytest.io start at $17/mo, polybacktest.com at $19.90/mo, and depthfeed.com at $29/mo, all for crypto-focused coverage. Marketlens Pro starts at $39/mo for every market type with full archive access, and the free tier includes markets open in the last 7 days and 2M rows one time at no cost.

Which Polymarket data providers have a free tier?

The Marketlens free tier includes 2M data rows one time and every market open in the last 7 days, with full API access. As of August 2026, depthfeed.com gives 7 days of history, polyhistorical.com limited BTC data, polybacktest.com recent BTC markets, polytest.io 30 recent markets, and polymarketdata.co prices and volume without order books. pmdata.dev offers a free trial with capped downloads.

Which Polymarket data provider works with AI assistants?

Marketlens ships an MCP server, so agents like Claude Code, Claude Desktop, and Cursor can search markets, pull order books, and run backtests directly. depthfeed.com added a read-only MCP endpoint for its order book data in July 2026. As of August 2026, the Marketlens MCP server is the only one that also runs backtests.

Try it

Judge the data, not the marketing

The free tier includes 2M data rows and every market open in the last 7 days, no card required. Pull a book, replay a market, run a backtest.

bash
$ pip install marketlens
Get a free API keyRead the docs