Massive
Contact details taken from the vendor's own site on 26 August 2026. Nothing here is guessed; a blank field means we did not find one.
Massive is listed in the Buyside Fintech directory with 1 product. Its products are listed under market data. That product is Massive Market Data API. Every fact on this page carries the source we read and the date we checked it, and the profile has not been claimed by Massive. Practitioners at firms that use Massive can review it here, and the company may reply to a review but may not write one.
How Massive describes itself
Stock API with real-time and historical tick data, unlimited usage via REST or WebSockets, standardized JSON and CSV formats. Instant access free tier.
Massive’s own website, read 2026-08-30
Their words, not ours. We publish it so you can see how a company positions itself; it is not an assessment and nothing in it has been checked.
Massive products
Massive Market Data API
Real-time and historical data from all US exchanges, dark pools and OTC markets plus options, indices, currencies and futures, over REST, WebSocket and SQL; polygon.io now 301-redirects to massive.com, so buyers searching the old name land here.
Confirmed on the vendor's own site · source · 2026-10-11
What practitioners say
Questions and notes