--- title: Polygon.io (Massive) Alternative for Macro and Rates Data description: "A Polygon.io alternative, now Massive, for macro traders: scored US releases, Treasury auctions, the curve and an MCP server, from a free key to $39.99." source: Helious canonical: "https://helious.io/compare/massive-polygon" --- Helious vs Massive (Polygon.io) # A Polygon.io alternative, now Massive, for the macro side of the trade Massive, the company formerly called Polygon.io, sells market data the way an exchange does: trades, quotes, aggregates and WebSockets for stocks, options, FX and crypto. Its stocks plans carry no economic data at all. If you came for the tape, stay. If you came for the print, you are in the wrong aisle. The short answer Massive is a price-data API and a good one, from $29 a month for delayed stock data to $199 for real time, with a free end-of-day tier. None of the stocks plans list a calendar, Treasury yields or a release. Helious is the other half: every US release scored on print, the calendar with the actual the second it lands, Treasury auctions read within seconds, the curve with its regime, and an MCP server. From a free key, $14.99 on Starter, $39.99 on Pro. ## Side by side Helious Massive (Polygon.io) Monthly price for the data a macro trader needs Free key $0; Starter $14.99; Pro $39.99 a month Stocks: Starter $29, Developer $79, Advanced $199 a month Cost per year About $180 on Starter or $480 on Pro paid monthly, 25% off paid yearly $348 to $2,388 paid monthly; 20% off yearly Free tier Yes, 100 credits a month on a free key, no card Yes, 5 calls a minute, end of day, 2 years Economic calendar with forecast, prior and live result Yes, every US release with forecast, prior and the actual the second it lands Not on the stocks plans Releases scored on print, in standard deviations Yes, every US release, against its own history No Treasury auction results with the tail and bidders Yes, within seconds: tail, bid to cover, bidder split and a verdict Not covered Treasury curve and regime Yes, 3 month bill to 30 year bond, 2s10s, and the regime named Not on the stocks plans Answers open with a plain sentence Yes, every answer opens with the finished sentence, then the numbers No, numbers only MCP server for AI agents Yes, 24 tools at one address, no glue code A listed server, marked experimental History 7 days free, 12 months Starter, 24 months Pro, 10 years Ultimate 5, 10 or 20+ years of prices by plan Calls a minute 60 free, 90 Starter, 120 Pro, 300 Ultimate, per key Unlimited on paid plans Live stream Yes, a WebSocket on Pro and Ultimate Yes, WebSockets on Advanced Redistribution Personal on Free to Pro; Ultimate at $99 allows redistribution Individual use; business plans sold separately ## What each one is for What Massive is good for - Tick-level trades and quotes, full-depth aggregates, flat files and WebSockets, for stocks, options, FX and crypto. - Unlimited calls on every paid plan, which matters if you are backtesting. - Twenty years of price history on Advanced. Where Helious wins - The macro side exists here and not there: the calendar, the scored release, the auction, the curve regime. - Treasury auction results within seconds, which no price-data API carries. - Every answer opens with a plain sentence, so an agent can act on it without a parsing layer. - A production MCP server with 24 named tools, not an experiment. - From a free key with 100 credits a month, then $14.99 or $39.99. ## Which should you choose **Go with Massive (Polygon.io)** if you need the tape: trades, quotes, aggregates and WebSockets for stocks or options, and the economic calendar is somebody else’s job. **Go with Helious** if the event you trade is the print or the auction, you want it read and scored as it lands, and you want your AI to read it too. ## FAQ ### What is the best Polygon.io alternative for macro data? Polygon.io, now Massive, is a price-data API and does not carry economic data on its stocks plans. For US releases scored on print, the calendar, Treasury auctions, the curve and an MCP server, Helious covers that from a free key, with Starter at $14.99 and Pro at $39.99 a month. ### How much does Massive (Polygon.io) cost? As of October 2026, the stocks plans are Basic free (5 calls a minute, end of day), Starter $29, Developer $79 and Advanced $199 a month, with 20% off yearly and real-time data starting on Advanced. Options, FX and crypto are priced separately. Check the vendor for current pricing. ### Does Helious have stock prices? Helious carries index futures, the Nasdaq 100 board, the dollar, Treasuries and commodities as a trading desk shows them, scored and in context. It is not a tick-data vendor and does not sell trades and quotes. ### Can I use both? That is the natural pairing: Massive for the tape, Helious for the print. The free Helious key runs alongside at no cost. [Get a free API key →](https://helious.io/developers/) There is a longer piece on [what is the best financial news source](https://helious.news/blog/what-is-the-best-financial-news-source) if you want the whole category. Or go and look at the live [news feed](https://helious.io/news), the [economic calendar](https://helious.io/calendar) and the [Treasury auction results](https://helious.io/auctions). Competitor names are the trademarks of their respective owners. Prices shown are approximate list prices as of October 2026 and change without notice. Check each provider for current pricing. This is our own view of the market, offered as general information and not financial advice.