Marketlens vs polyhistorical.com
A budget data service for BTC, ETH, and SOL up/down markets with 300ms order book snapshots and rolling history. Below is how it compares to Marketlens on market coverage, book resolution, history depth, backtesting, and price.
Last updated November 1, 2026
Competitor details as of November 2026, per each vendor's public site.
marketlens
polyhistorical.com
How Marketlens differs from polyhistorical.com
polyhistorical.com samples books every 300ms for three assets' up/down markets. Marketlens records change level books, every price change with a millisecond timestamp, for those same markets plus everything else recurring on Polymarket: more assets, more cadences, structured products, sports, weather, and macro. Sampling at 300ms is fine for many strategies, but change level capture is exact by construction.
The bigger practical difference is history. polyhistorical.com keeps order book history for 31 days on its $17/mo plan, extendable to 90, and back to August 2026 on its $41/mo plan, so book level backtests cannot reach further back. The Marketlens archive is permanent and fully queryable on Pro and Scale, and bulk Parquet exports pull entire markets for offline research.
Which should you pick?
Pick marketlens
Every recurring Polymarket market type at millisecond book resolution, a permanent archive on Pro and Scale, backtesting with queue priority and fees, Parquet exports, and an MCP server. Pro is $39/mo.
Pick polyhistorical.com
Budget is the only constraint and recent BTC, ETH, or SOL up/down data is all you need: entry pricing at $17/mo is the cheapest paid order book access in the category, tied with resolvedmarkets.com.
FAQ
Common questions
What is the best polyhistorical.com alternative?
Marketlens, if you need history from before August 2026 or markets beyond BTC, ETH, and SOL up/down. It keeps a permanent archive from March 2026 with millisecond change level books across every recurring Polymarket market type, queryable in full from $39/mo on Pro, with markets open in the last 7 days on the free tier.
How much history does polyhistorical.com keep?
31 days on the $17/mo plan, extendable to 60 or 90 days, and the full archive since August 2026 on the $41/mo plan, as of November 2026; resolved market results stay available. Marketlens keeps full order book history from March 2026 onward on Pro and Scale.
Is 300ms order book sampling enough for backtesting?
It depends on the strategy. For slower signals it is usually fine; for queue position, fill probability, and slippage modelling you want every book change, because activity between samples is where those effects live. Marketlens records change level books and its backtester replays them tick by tick with FIFO queue priority.
Does polyhistorical.com have a backtester?
It offers strategy replay, with an AI backtest agent on its higher tiers as of August 2026. Marketlens ships a full Python backtesting harness with two modes, Alpha for signal research and Execution for order level realism with latency, slippage, and fees, plus an MCP server so AI agents can run backtests directly.
Other alternatives: polymarketdata.co, depthfeed.com, pmdata.dev, polybacktest.com, polytest.io, or the full provider comparison.
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.
$ pip install marketlens