OpenMarket vs ATAS

OpenMarket and ATAS cannot be ranked on price directly, because OpenMarket bills in US dollars and ATAS in euros. OpenMarket lists Plus at $29 per month billed annually ($348 a year) or $35 month-to-month on its Plus page; the same dollar prices came back for guest sessions from 10 countries, but checkout and regional pricing were not tested. ATAS lists Plus at €19.95 per month on annual billing, €23.95 on 3-month billing and €24.95 month-to-month, and sells a Plus lifetime license for €999. Both have a free plan, OpenMarket's Free and ATAS's Start, and ATAS paid plans carry a 14-day trial that needs a linked card or PayPal. Futures data is extra on both sides: OpenMarket sells CME real-time data from $7 per month as an add-on, while ATAS lists no data fee of its own and relies on third-party providers. Last checked in October 2026.

OpenMarket Plus allows more indicators per chart than ATAS Plus. OpenMarket lists 10 indicators per chart on Plus and 3 data indicators on Free, with unlimited classic indicators on Free, while ATAS lists 6 per chart on Plus, 12 on Pro and 3 on Start. For alerts, OpenMarket allows 2 indicator alerts on Free and 25 on Plus, plus 100 and 500 price alerts, and an indicator alert runs a published indicator in OpenMarket's cloud. ATAS alerts run locally and do not trigger if the program is closed or the PC is asleep; no numeric alert limit per plan was found on its pricing or help pages. On connections, ATAS Start and Plus allow one active connection, crypto exchanges only, and OpenMarket Plus allows 5 device sessions against 1 on Free. Figures come from each vendor's pages, last checked in October 2026.

OpenMarket runs in the browser, while ATAS is installed as a desktop application. OpenMarket has no native iOS or Android app, but the platform works in a mobile browser, and the vendor recommends a desktop or tablet for complex analysis. ATAS ships as an .exe on Windows and a .dmg on macOS; Classic ATAS lists Windows 10 or later only, and the macOS build is ATAS X, listed as beta, which asks for 8 GB RAM, 80 GB of disk and a GPU with 4 GB VRAM. The ATAS license allows one simultaneous login. The scripting languages differ: OpenMarket's wrun uses TypeScript syntax compiled to WebAssembly and runs sandboxed in the user's browser, or on OpenMarket's servers when the code is protected, while ATAS indicators, modules and algorithms are written in C#, and ATAS support does not provide development help for custom indicators and bots. Last checked in October 2026.

Both OpenMarket and ATAS offer footprint and heatmap tools, and they differ most on backtesting. OpenMarket lists order-book heatmaps, footprints, CVD and liquidation maps on any market, with heatmap resolution at 4K on both plans and a deeper heatmap and 1-second candles on Plus. ATAS lists 400+ footprint configurations (Volume, Delta, Bid x Ask, Trades, Profile, Heatmap), 14 timeframe types, a Smart DOM and a Heatmap (beta) on all plans. For testing, OpenMarket's wrun strategies run in a Strategy Tester that produces a trade list, equity curve and stats, using simulated orders only. ATAS describes backtesting as tick-by-tick replay of historical sessions, its Market Replay runs at x1 to x1000 on all plans, and no automated strategy-report module was found on its pages. Feed choice matters on ATAS: a dxFeed connection does not support delta, reversal or order flow charts. Last checked in October 2026.

OpenMarket lists its own market coverage, while ATAS does not bundle market data and depends on the provider or broker connected to it. OpenMarket states 16,000+ markets and data series, including 4,000+ crypto perpetuals and spot pairs across 29 venues, 5,500+ NYSE and Nasdaq stocks and ETFs, CME Group futures, options from 7 venues and prediction markets. ATAS futures connections include CQG, dxFeed, Interactive Brokers, IQFeed and Rithmic, and its crypto list covers Binance, Bybit, Kraken and OKX. On ATAS Start and Plus, futures data is 15-minute delayed, with real-time futures data from Pro. For orders, OpenMarket supports Hyperliquid perpetuals from a wallet the user controls and US stocks and ETFs through Alpaca; Hyperliquid execution is unavailable to residents of the United States and Malaysia. ATAS sends orders from the chart to the connected broker or exchange. Last checked in October 2026.

OpenMarket is operated by Thalamus Technologies, Inc., a Delaware corporation, and ATAS by SIA ATAS in Riga, Latvia; both state they are software providers, not brokers. OpenMarket's Terms name Thalamus Technologies as the operator, while the homepage footer shows Openmarket Labs as the copyright holder, a different name. OpenMarket says it does not operate an exchange, act as a broker or dealer, or take custody of funds, and its brokerage execution goes through Alpaca Securities LLC, a registered broker-dealer with which it says it is not affiliated. ATAS states it is not a broker, dealer or exchange and does not accept client funds; no financial-regulator licence number was found on its pages, and its license is governed by Latvian law. ATAS support is by email and Telegram, Monday to Friday, 8:00 to 17:00 CET, and OpenMarket says it cannot recover lost funds or reverse orders. Last checked in October 2026.