Independent review · 2026
Gravia layers order flow, wallet analytics and a 5-minute crypto Up/Down terminal on top of Polymarket and Kalshi. We tested it, mapped the access flow, and built free calculators so you can size positions before you click.
Referral link · costs you nothing · not financial advice
Short answer
Gravia is an intelligence layer for prediction markets. It reads Polymarket and Kalshi, scores the traders behind the flow, and gives you a fast execution surface for short-dated crypto Up/Down contracts. It does not hold your funds — it is the screen, not the exchange.
Chart
Live BTC price with Binance and Coinbase feeds side by side with the Chainlink spot mark, plus the TWAP 30s and TWAP 60s resolution lines that actually settle the market. You watch the number the contract resolves against, not a proxy.
Order Book
The Polymarket Up/Down book (price, shares, cumulative total, last trade and spread) next to the CEX book, so you can see when the binary is mispriced against spot before you take the offer.
Smart Analysis
Every trader in the current 5-minute market ranked by net exposure: side, Up/Down share counts, average entry in cents, market PnL, all-time PnL and how long ago they entered. This is the copy-trade radar.
Live Trades
A rolling 100-trade feed of buys and sells with shares, price, USD size and fee — and two timestamps: mempool sighting and on-chain confirmation. You see flow before it confirms.
Profiles
Any wallet or Polymarket username opens a full profile: portfolio split into cash and positions, buy/sell volume, total PnL net of fees, win rate, and tabs for Positions, Activity, Categories, Analytics and Counterparties.
Analytics
Trades are scored with trade-tape markouts — hypothetical PnL at a fixed horizon after each fill — and grouped by economic counterparty, so you can tell skill apart from being on the right side of a slow taker.
Rewards
Rolling 30-day weighted taker volume determines your tier and progress to the next one. Profiles can be followed directly from the terminal for copytrade-style monitoring.
API
The same data via REST: current Up/Down market, price-to-beat, market categories, user trades, positions, category metrics, taker tier — plus WebSocket streams for Chainlink prices and live trades including unconfirmed mempool rows.
Nothing for the software. The terminal has no subscription and the Data API is free in beta — Gravia’s own docs page says so in one line. Your cost is the Polymarket spread and the per-trade fee printed next to every fill.
Terminal
$0
no subscription
Full web terminal: chart, dual order book, Smart Analysis, live trade tape, trader profiles and portfolio analytics.
Data API
$0
free beta
Gravia's official docs state it plainly: "It's free, there ain't no pricing." REST plus WebSocket access for bot builders and researchers.
Trading costs
Venue
pass-through
What you actually pay when you click. Gravia routes; Polymarket prices and settles the contract.
Size the position, price the edge, then execute. All calculators run in your browser.
We do not publish invented user quotes. Everything below can be checked in the product or the documentation in under a minute.
The Smart Analysis table and the 100-trade live feed are open on the front page — wallet addresses, entry prices, market PnL and all-time PnL are all clickable through to Polymarket.
Open the terminal →A published REST and WebSocket reference with markouts, counterparty grouping, taker tiers and Chainlink price streams — with the pricing page stating there is no pricing.
docs.gravia.trade →Access codes and API keys are issued through tickets in the #access-code channel, and the team states it takes feature requests there directly.
Join the community →Gravia is a live crypto prediction-markets terminal that aggregates data from Polymarket and Kalshi into one interface: trader analytics, a 5-minute crypto Up/Down terminal, wallet research across millions of traders, and an advanced portfolio view.
Yes. There is no subscription and no Gravia fee on top of your trade — the official docs pricing page reads "It's free, there ain't no pricing." The Data API is free in beta too, at 100 requests per minute. You only pay the Polymarket spread and the per-trade fee shown in the tape.
Gravia is a young product (public since 2026) with a small footprint, so automated trust scanners rate the domain low simply because it is new. It is a front-end and analytics layer, not a custodian: your positions live on Polymarket or Kalshi. Treat it as early-stage software and start with small size.
Yes — the terminal asks for an access code or an invite link. An invite link is the simpler route because it opens the access flow directly. For an API key, join the Gravia Discord, open the #access-code channel and create a ticket; keys are issued in cohorts.
Zero for the software. A live example from the trade tape: 40 Up shares bought at 99¢ costs $39.60 with a $0.03 venue fee, and the front 5-minute book usually shows a 1¢ spread. That spread, not a subscription, is your real cost.
Crypto Up/Down binaries on short timeframes, plus the broader event markets indexed from Polymarket and Kalshi — macro, crypto price thresholds, and general event contracts.
Gravia access is invite-gated
1,500+ traders · $2.0M volume