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Head-to-head · Apis Data Services

Massive (formerly Polygon.io) vs Finnhub

  • Updated Oct 2026
  • Both researched from official sources
  • 3 checks side by side
Higher score Massive (formerly Polygon.io) #1 in Apis Data Services 8.8/10 Free plan Free plan✓ 2 of 3 features Visit Massive
Finnhub #4 in Apis Data Services 8.4/10 Free plan Free plan✓ 1 of 3 features Visit Finnhub

Massive (formerly Polygon.io) leads on 0 checks, Finnhub on 0, and 3 are even. Who comes out ahead on the 3 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreMassive (formerly Polygon.io) · 8.8/10
  • Free planboth
  • Most featuresMassive (formerly Polygon.io) · 2 of 3

Massive (formerly Polygon.io) scores higher on our rubric for apis data services: 8.8 against 8.4 out of 10; our editors rank them #1 and #4.

Massive (formerly Polygon.io) is the better fit for developers needing broad financial market data. Finnhub is the better fit for real-time stock data and financial fundamentals.

  • Massive (formerly Polygon.io) fits best

    Developers needing broad financial market data

  • Finnhub fits best

    Real-time stock data and financial fundamentals

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature Massive (formerly Polygon.io) 8.8/10 Visit ↗ Finnhub 8.4/10 Visit ↗
At a glance
Editor score 8.8 8.4
Ranking #1 in Apis Data Services #4 in Apis Data Services
Best for Developers needing broad financial market data Real-time stock data and financial fundamentals
Pricing model Free plan + paid Free plan + paid
Starting price $29/mo Free plan
Free plan ✓ ✓
Free trial — —
Deployment Cloud Cloud
Built for Solo, Small business, Mid-market, Enterprise Solo, Small business, Mid-market, Enterprise
Features Massive (formerly Polygon.io) 2/3 · Finnhub 1/3
Historical data ✓ ✓
Webhooks Not checked yet Not checked yet
Official SDKs ✓ (best) Not checked yet
Specs
Monthly request limit Not checked yet Not checked yet
Rate limit Not checked yet Not checked yet
API style Rest Rest
Data coverage Global Global
Our review
Pros
  • Covers stocks, options, futures, indices, forex, crypto, and economics
  • Offers REST, WebSocket streaming, and historical flat-file downloads
  • Stocks Basic is free; paid Stocks plans start at $29 per month
  • Covers real-time stock prices and company fundamentals
  • Includes estimates, alternative data, and company news
  • Offers historical candles, WebSocket trades, forex, and crypto data
Cons
  • Stocks Basic is limited to 5 API calls per minute
  • Stocks Starter and Developer provide 15-minute delayed data
  • Plan prices shown apply to individual Stocks plans, not business plans
  • Pricing and request limits are not detailed here
  • API-focused, so it may not suit buyers seeking a ready-made app
  • Coverage breadth may exceed the needs of a single-market use case
Our verdict

Massive (formerly Polygon.io) provides financial market data for developers building trading applications, analytics tools, and other financial products. Its coverage spans stocks, options, futures, indices, forex, crypto, and economics,…

Read the review →

Finnhub provides financial data APIs for developers and businesses building market-data applications. Its coverage includes stock prices, company fundamentals, analyst estimates, alternative financial data, and company news. The service…

Read the review →
  1. Massive (formerly Polygon.io)Apis Data Services 8.8Free plan
  2. FinnhubApis Data Services 8.4Free plan

Strengths and trade-offs

  • Massive (formerly Polygon.io) — where it wins

    • Covers stocks, options, futures, indices, forex, crypto, and economics
    • Offers REST, WebSocket streaming, and historical flat-file downloads
    • Stocks Basic is free; paid Stocks plans start at $29 per month

    Where it doesn't

    • Stocks Basic is limited to 5 API calls per minute
    • Stocks Starter and Developer provide 15-minute delayed data
    • Plan prices shown apply to individual Stocks plans, not business plans

  • Finnhub — where it wins

    • Covers real-time stock prices and company fundamentals
    • Includes estimates, alternative data, and company news
    • Offers historical candles, WebSocket trades, forex, and crypto data

    Where it doesn't

    • Pricing and request limits are not detailed here
    • API-focused, so it may not suit buyers seeking a ready-made app
    • Coverage breadth may exceed the needs of a single-market use case
  • Massive (formerly Polygon.io)8.8/10 · Free plan

    Broad market data with REST, streaming, and bulk downloads for developer-built finance products.

    Visit MassiveFull verdict →
  • Finnhub8.4/10 · Free plan

    Financial-data APIs spanning real-time prices, fundamentals, news, and historical market data.

    Visit FinnhubFull verdict →

More comparisons

All apis data services comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update