Massive
Full-tick US equities, options and futures from a direct exchange feed.
Last updated
What it is
Massive is a market data API for people writing code: REST endpoints for aggregates, trades and quotes, a WebSocket for streaming, and flat-file downloads for anyone who would rather pull a year of ticks into a bucket than paginate through it. Coverage is US-only — equities, options, indices, futures, forex and crypto — priced per asset class, so an options subscription does not come with equities attached.
The company traded as Polygon.io until 30 October 2025, when it renamed itself Massive.com, Inc. Nothing about the product changed with the name: the same accounts, keys and endpoints carried over, and the old domain redirects to the new one.
The distinguishing fact is the source: Massive takes exchange feeds directly rather than reselling somebody else's aggregation. That is what makes full tick history available at all, and it is the reason the price per asset class is what it is.
Pricing
Stocks, options and futures each have four tiers; indices has three, at $0, $49 and $99, and currencies two, at $0 and $49. Basic is free, end-of-day and capped at five requests a minute. Starter, at $29/month, is where the rate cap, the WebSocket and flat files change hands — but the data is still 15-minute delayed, and so is Developer at $79, which buys tick-level trades and a longer history window rather than a faster feed. Real-time trades and quotes start at Advanced, $199/month.
Budget by asset class, not by tier name: stocks and options are separate subscriptions, so real-time on both is $398 a month, not $199. Currencies are the one place where real-time is cheap — that plan starts at $49.
The individual tiers are licensed for personal, non-business use. Commercial use is a different price list that starts at $2,499/month for stocks.
Data & coverage
US markets only. If you need European or Asian listings, this is the wrong provider and no tier fixes it — see the market data category for ones that cover them.
Integrations
Client libraries for Python, JavaScript, Go and Java, published under the massive name since
the rename with the older polygon packages maintained alongside them. Flat files are served
over an S3-compatible interface. There is a first-party MCP server, rebuilt in March 2026 around
four composable tools — search the endpoint docs, read one, call the API, query with SQL —
rather than one tool per endpoint, so an agent can work the API without a hand-written wrapper.
Limitations
- No non-US equity or options listings at any price.
- Real-time is the $199 tier. The $29 and $79 tiers are 15-minute delayed, which catches people who read "unlimited API calls" as "live data".
- Redistribution, display to third parties and any business use need a separate agreement, which catches people building consumer products.
- Company financials and ratios are a separate $29/month product unless you are on Stocks Advanced, which bundles them.
Alternatives
Within the same category: providers that cover non-US markets, and cheaper aggregators for anyone who does not need tick data.
Compare it against the rest of the market data APIs.
Specs
- Interfaces
- API, Python, MCP server
- Export
- CSV, JSON
- Asset classes
- Stocks, ETF, Options, Futures, Forex, Crypto, Indices
- Markets
- US
- Platforms
- Web, Library
- AI features
- None
- Capabilities
- News
- Pricing verified
- Capabilities verified
- Coverage verified
Also worth comparing
- Alpaca Market Data — Free IEX data forever, full SIP and OPRA for a flat $99 a month.
- Finnhub — Real-time US quotes and a live trade stream on a free key. OHLC candles are not free.
- IQFeed — Tick-by-tick data into a local Windows socket, with exchange fees billed on top.
- Twelve Data — Global stocks, forex and crypto over REST and WebSocket, billed in credits per minute.
- Barchart OnDemand — Seventy-odd REST endpoints covering equities, options and physical commodities.
- AlgoSeek — Lossless SIP, OPRA and CME tick history with published per-asset-class lease pricing.
Named as a replacement for
FAQ
Is Polygon.io the same thing as Massive?
Yes. Polygon.io renamed itself to Massive.com, Inc. on 30 October 2025 — a rename, not an acquisition or a new product. The polygon.io domain redirects to massive.com, existing accounts and API keys carried over untouched, and the old api.polygon.io base still answers, though the vendor says it will be retired with notice.
Does Massive have a free tier?
Yes. The Basic plan costs nothing and returns end-of-day data at five requests per minute, over two years of history, with no WebSocket access. It is enough to prototype against the response shapes, not enough to build on.
Can I redistribute Massive data in my own product?
Not on an individual subscription. The Market Data Terms forbid redistributing, displaying or passing the data — or works derived from it — to third parties, and forbid business use outright, absent written consent. Business plans are a separate price list starting at $2,499 a month for stocks.
Is Massive real-time or delayed?
It depends on the tier, and the step up is expensive. Basic is end-of-day; Starter at $29 and Developer at $79 are both 15-minute delayed; real-time trades and quotes begin at Advanced, $199 a month, per asset class. Currencies are the exception — that plan is real-time from $49.