Marketlens vs polytest.io
A lightweight data service for BTC, ETH, and SOL up/down markets with sub-second 8-level books, aimed at AI coding tools. Below is how it compares to Marketlens on market coverage, book resolution, history depth, backtesting, and price.
Last updated August 3, 2026
Competitor details as of August 2026, per each vendor's public site.
marketlens
polytest.io
How Marketlens differs from polytest.io
polytest.io serves BTC, ETH, and SOL up/down markets at sub-second resolution, 8 levels deep. Its entry plan keeps 14 days of history; full history requires the $29/mo Pro plan. Marketlens records the full book, change by change with millisecond timestamps, for every recurring Polymarket market type, and the archive back to March 2026 is queryable on every tier including free.
Fourteen days is enough to prototype but not to validate. Crypto up/down markets produce thousands of instances per month, and regime changes across months are what kill overfit strategies. A deep archive lets you train on one period and test on another, which a two week window cannot.
Which should you pick?
Pick marketlens
Every recurring Polymarket market type at millisecond book resolution, a permanent archive on every tier including free, backtesting with queue priority and fees, Parquet exports, and an MCP server. Pro is $29/mo.
Pick polytest.io
You want the cheapest possible recent-window sandbox for BTC, ETH, or SOL up/down experiments: $17/mo, with a free tier of 30 recent markets.
FAQ
Common questions
What is the best polytest.io alternative?
Marketlens, if you need markets beyond BTC, ETH, and SOL up/down or change level books rather than sampled snapshots. It keeps a permanent archive from March 2026 across every recurring Polymarket market type, with a Python SDK, backtesting, Parquet exports, and an MCP server. The free tier includes full archive access with 5M events/day.
How much history does polytest.io keep?
14 days on the $17/mo entry plan; the $29/mo Pro plan serves full history, as of August 2026. Marketlens keeps everything from March 2026 onward on every tier, including free.
Is 8 levels of order book depth enough?
For top of book strategies, usually yes. For depth sensitive work like large orders, queue modelling, or liquidity analysis, you want the full book. Marketlens snapshots store every level, and deltas record every change at any level.
Does polytest.io have a free tier?
Yes, 20 recent 5 minute and 10 recent 15 minute markets at 30 requests/min, as of August 2026. The Marketlens free tier covers the entire archive and all market types at 180 requests/min with 5M events per day.
Other alternatives: polymarketdata.co, depthfeed.com, polyhistorical.com, pmdata.dev, polybacktest.com, or the full provider comparison.
Try it
Judge the data, not the marketing
The free tier includes 5M events per day with full API and full archive access, no card required. Pull a book, replay a market, run a backtest.
$ pip install marketlens