Every Polymarket tool shows you a win rate. The comparison that matters is simpler: can you verify it? Here's the landscape, honestly — including where we're weaker.
| rex | PolySyncer | Polycopy | free trackers | |
|---|---|---|---|---|
| Price | free | $299–499/yr* | ~$30/mo* | free |
| Survivorship-bias-free backtests (out-of-sample, methodology published) | yes — CIs included | not published | not published | n/a |
| Public forward ledger (every position, settled on-chain) | yes | no | no | no |
| Losses page (failures permanently public) | yes | no | no | no |
| Cryptographic verification (sha256 daily timeline + public git witness) | yes — verify now | no | no | no |
| Free data API | yes, CORS open | no | no | varies |
| Live auto-execution with real funds | not yet — paper desk | yes | yes | no |
| Track-record age | young (days) | longer* | longer* | n/a |
PolySyncer and Polycopy execute real-money copy-trades today; rex's public desk is paper-first by design (and US CLOB access is geoblocked at order time — execution is your legal call wherever you are). Their products have also existed longer. What neither publishes: a verifiable forward record. A win rate you can't audit is marketing, not measurement.
rex is the verified-record play: every engine position settles publicly against the on-chain outcome, the ledger is cryptographically fingerprinted daily, and the losses stay up forever. If a competitor starts publishing the same, everyone wins — that's the standard we're trying to set.
Try the free desk — no signup →*Third-party pricing and features as of June 2026, from public pages; they may have changed — check their sites. rex is paper-trading software and not financial advice. Related: Forward Ledger · Kelly calculator · odds converter.