--- title: "PolymarketScan Alternative: A Graded Product Against a Free Platform With Inconsistent Large-Trade Rules" canonical: "https://0xinsider.com/compare/polymarketscan-alternative" datePublished: "2026-09-17" dateModified: "2026-09-17" description: "0xinsider vs PolymarketScan: a subscription grade with published eligibility floors against a free platform whose own large-trade thresholds disagreed with its live feed." --- # PolymarketScan Alternative: A Graded Product Against a Free Platform With Inconsistent Large-Trade Rules Last updated: 2026-09-17 Canonical: https://0xinsider.com/compare/polymarketscan-alternative PolymarketScan is free for every read, with a Polymarket-Kalshi arbitrage scanner and an AI assistant. 0xinsider charges for a sports and esports grade built on eligibility floors. ## TL;DR PolymarketScan is a free Polymarket and Kalshi analytics site: an arbitrage scanner, behavior badges with published numeric thresholds, an AI chat assistant, and an open API and MCP server with no key required. Its own copy gives three different definitions of a large trade, and they disagreed with its live feed when checked on 2026-09-17. 0xinsider is a paid, sports- and esports-only product built around a single graded score with eligibility floors and a full risk-metric set per wallet. ## Highlights | Metric | 0xinsider | PolymarketScan | Winner | | --- | --- | --- | --- | | Cost to read | Free account plus a paid Pro tier | Free for every listed read feature | PolymarketScan | | Venue coverage | Polymarket | Polymarket, plus a Polymarket-Kalshi arbitrage scanner and Polymarket Perps | PolymarketScan | | Trader grade | Published grade with eligibility floors | Independent behavior badges with published thresholds; no composite grade found | -- | | Large-trade threshold consistency | One defined threshold per tier | Three different published definitions, which disagreed with the live feed on 2026-09-17 | 0xinsider | ## Comparison | Feature | 0xinsider | PolymarketScan | Winner | | --- | --- | --- | --- | | Type | Prediction-market analytics for sports and esports | Free Polymarket and Kalshi analytics site, funded by referrals and donations | -- | | Platforms covered | Polymarket | Polymarket, Kalshi (arbitrage scanner), and Polymarket Perps | PolymarketScan | | Cost model | Free account, Pro subscription for live data | Free for all listed read endpoints; revenue from referral links, donations, and a $10/mo Copilot Pro tier | PolymarketScan | | Trader scoring | 0-100 grade, F-to-S, with eligibility floors above C | Independent badges (Whale, Sharp, Sniper, Diamond Hands, Sniper Closer, Contrarian) with published numeric thresholds; no composite grade found | -- | | Risk metrics per trader | Sharpe, Sortino, drawdown, expectancy, VaR, Kelly fraction | Sharpe ratio, win rate, ROI, average hold time, and similar-trader matching by position overlap | 0xinsider | | Large-trade definition | One published threshold per feed tier | Three different published definitions ($5K per trade, $50K cumulative badge, $10K/$50K glossary entry), which disagreed with the live feed on 2026-09-17 | 0xinsider | | Alerts | Email on named wallets and markets | Telegram bot with price, liquidity, and time-to-close alerts, plus an auto-posting X account and a Discord community | PolymarketScan | | API and MCP | REST API and remote MCP server, both require Pro | Open Agent API and MCP server, no key required; a separate keyed Public API | PolymarketScan | | AI and extras | None | An AI chat assistant, an AI-versus-humans probability comparison, a rules-ambiguity scanner, and an AI paper-trading arena | PolymarketScan | ## What PolymarketScan is, and what we found on 2026-09-17 PolymarketScan describes itself as 'a free, independent analytics and tracking platform for prediction market enthusiasts,' covering Polymarket, a Polymarket-Kalshi arbitrage scanner, and read-only Polymarket Perps snapshots. Every listed read feature, including the leaderboard, the trader profiles, and the API, is free with no signup; the site says it earns instead through referral links, premium analyst panels, and embeddable widgets. Checking the site on 2026-09-17 turned up internal inconsistencies worth naming plainly. Its own copy gives three different definitions of a large trade (a $5,000 per-trade rule, a $50,000 cumulative-volume badge, and a glossary entry citing both $10,000 and $50,000), and the live feed pulled that day, described as $5,000-and-up, included a $1,050 trade tagged '[small]'. Wallet-count figures also disagreed across its own pages (606K+, 896,000+, and 1.35 million, each cited on a different page), and its home page still showed trending markets from January through March 2026 at fetch time. ## Venue coverage: an arbitrage scanner against sports depth PolymarketScan's Polymarket-Kalshi arbitrage scanner and its read-only view into Polymarket's experimental Perps API are real differentiators; neither has an equivalent on 0xinsider, which reads Polymarket only. 0xinsider's scope is narrower on purpose: sports and esports on Polymarket, with per-game boards and in-play position tracking that a general cross-venue tool does not build. **Verdict (PolymarketScan):** More venues, and a real arbitrage view. ## Trader scoring and risk metrics PolymarketScan publishes six behavior badges with numeric thresholds (for example, Sharp requires over 60% win rate and more than 50 settled trades), plus a separate 'Best Polymarket Traders' ranking by all-time P&L with a 50-trade minimum, which includes unrealized gains on open positions. No single composite grade was found, though the About page mentions 'our rankings, grades' without pointing to one. 0xinsider grades on realized (banked) profit with hard eligibility floors: anything above a C needs verified net-positive realized profit, and the top three grades also need a real resolved-market count and a survivable worst drawdown. Per wallet, 0xinsider also reports the full risk-metric set (Sharpe, Sortino, drawdown, expectancy, VaR, Kelly fraction); PolymarketScan's profile page reports a Sharpe ratio alongside win rate, ROI, and average hold time. **Verdict (0xinsider):** One graded score with floors, and a fuller risk-metric set. ## Detection, alerts, and AI extras PolymarketScan's anomaly detector was still 'establishing token baselines' when checked on 2026-09-17, with wallet attribution 'not live yet' and zero flagged items shown. Its live features run wider than 0xinsider's, though: a Telegram bot for price, liquidity, and closing-time alerts, an auto-posting X account, a Discord community, an AI chat assistant, an AI-versus-humans probability comparison, a rules-ambiguity scanner, and a paper-trading arena for AI agents. 0xinsider's Insider Radar is a live, scored feature today, publishing statistical flags with the wallet, market, and timestamp attached; alerts run by email on the wallets and markets a reader names. **Verdict (PolymarketScan):** More channels and tools, though the anomaly detector was not yet live. ## What each one costs PolymarketScan is free for every read feature it lists, including its API and MCP server with no key required. Its own copy names referral links, premium analyst panels, and a $10/mo Copilot Pro assistant tier (found in its client code, not on a page) as its revenue. 0xinsider's free account includes the full trader leaderboard, full trader profiles with Insights, the previous day's large trades, and one Pick of the Day. Pro adds the live large-trade feed, custom alerts, Insider Radar, the REST API and MCP server, and in-game position changes while a game is live. Current plans are on the [pricing page](https://0xinsider.com/pricing). ## Which one to use Use PolymarketScan if the job is free, wide reads across Polymarket and Kalshi, an arbitrage scanner, or an AI assistant to ask about market data, and the inconsistencies above are ones you can work around. Use 0xinsider if the job is a sports and esports grade you can trust the eligibility rules on, backed by a full risk-metric set and a single, consistent definition of a large trade. ## Best for 0xinsider - Traders who want one graded score with eligibility floors, not several independent badges - Sports and esports traders who want live per-game boards and in-play position tracking - Readers who want a full risk-metric set (Sharpe, Sortino, drawdown, VaR, Kelly) on one wallet ## Best for PolymarketScan - Readers who want every feature free, including the API and MCP server, with no account - Traders who also watch Kalshi and want a Polymarket-Kalshi arbitrage scanner - Anyone who wants Telegram alerts, an AI chat assistant, or an airdrop-points calculator alongside the data ## 0xinsider: Pros & Cons **Pros** - Full risk-metric set per wallet, not just a Sharpe ratio and win rate - Eligibility floors gate the top grades on more than one lucky position - Sports and esports focus: live per-game boards and in-play tracking - One consistent definition of a large trade **Cons** - Costs a subscription; PolymarketScan's core reads are free with no account - Polymarket only, no Kalshi arbitrage view - No AI chat assistant or paper-trading arena ## PolymarketScan: Pros & Cons **Pros** - Every listed read feature is free, including the API and MCP server with no key - Covers Polymarket, a Polymarket-Kalshi arbitrage scanner, and Polymarket Perps - Telegram bot alerts, a Discord community, and an AI chat assistant - Data published under a CC BY 4.0 license **Cons** - Three different published large-trade definitions disagreed with the live feed on 2026-09-17 - No single composite trader grade; badges are independent signals - The anomaly detector was still establishing baselines at fetch time, with wallet attribution not yet live - Wallet-count figures disagree across its own pages