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Head-to-head · Apis Data Services

Massive (formerly Polygon.io) vs Alpha Vantage

  • 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
Alpha Vantage #3 in Apis Data Services 8.5/10 Free plan Free plan✓ 2 of 3 features Visit Alpha Vantage

Massive (formerly Polygon.io) leads on 0 checks, Alpha Vantage 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

Massive (formerly Polygon.io) scores higher on our rubric for apis data services: 8.8 against 8.5 out of 10; our editors rank them #1 and #3.

Massive (formerly Polygon.io) is the better fit for developers needing broad financial market data. Alpha Vantage is the better fit for developers seeking equities, forex, and crypto data.

  • Massive (formerly Polygon.io) fits best

    Developers needing broad financial market data

  • Alpha Vantage fits best

    Developers seeking equities, forex, and crypto data

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 ↗ Alpha Vantage 8.5/10 Visit ↗
At a glance
Editor score 8.8 8.5
Ranking #1 in Apis Data Services #3 in Apis Data Services
Best for Developers needing broad financial market data Developers seeking equities, forex, and crypto data
Pricing model Free plan + paid Free plan + paid
Starting price $29/mo Free plan
Free plan ✓ ✓
Free trial — —
Deployment Cloud Cloud
Support Email, Docs Email, Docs
Built for Solo, Small business, Mid-market, Enterprise Solo, Small business, Mid-market, Enterprise
Features Massive (formerly Polygon.io) 2/3 · Alpha Vantage 2/3
Historical data ✓ ✓
Webhooks Not checked yet Not checked yet
Official SDKs ✓ ✓
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 equities, forex and cryptocurrency through API endpoints.
  • Documents historical equity time series, including 25+ years for some intervals.
  • Supports JSON and CSV, with examples in four programming languages.
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
  • Financial data access requires API-key authentication.
  • Premium endpoints and data entitlements vary by plan.
  • Support channels are limited to email and documentation.
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 →

Alpha Vantage provides REST APIs for financial and economic data, including global equities, foreign exchange, cryptocurrencies and technical indicators. Developers can request current or historical time series and receive responses in…

Read the review →
  1. Massive (formerly Polygon.io)Apis Data Services 8.8Free plan
  2. Alpha VantageApis Data Services 8.5Free 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

  • Alpha Vantage — where it wins

    • Covers equities, forex and cryptocurrency through API endpoints.
    • Documents historical equity time series, including 25+ years for some intervals.
    • Supports JSON and CSV, with examples in four programming languages.

    Where it doesn't

    • Financial data access requires API-key authentication.
    • Premium endpoints and data entitlements vary by plan.
    • Support channels are limited to email and documentation.
  • 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 →
  • Alpha Vantage8.5/10 · Free plan

    A REST API for global market data, with historical equities and technical indicators.

    Visit Alpha VantageFull 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