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Head-to-head · Apis Data Services

Massive (formerly Polygon.io) vs Open-Meteo

  • 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
Open-Meteo #8 in Apis Data Services 7.9/10 Free plan Free plan✓ 1 of 3 features Visit Open-Meteo

Massive (formerly Polygon.io) leads on 0 checks, Open-Meteo 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 7.9 out of 10; our editors rank them #1 and #8.

Massive (formerly Polygon.io) is the better fit for developers needing broad financial market data. Open-Meteo is the better fit for developers needing free, open-source weather data.

  • Massive (formerly Polygon.io) fits best

    Developers needing broad financial market data

  • Open-Meteo fits best

    Developers needing free, open-source weather 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 ↗ Open-Meteo 7.9/10 Visit ↗
At a glance
Editor score 8.8 7.9
Ranking #1 in Apis Data Services #8 in Apis Data Services
Best for Developers needing broad financial market data Developers needing free, open-source weather data
Pricing model Free plan + paid Free plan + paid
Starting price $29/mo —
Free plan ✓ ✓
Free trial — —
Deployment Cloud Cloud
Support Email, Docs Docs, Community
Built for Solo, Small business, Mid-market, Enterprise Solo, Small business, Mid-market, Enterprise
Features Massive (formerly Polygon.io) 2/3 · Open-Meteo 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 Not checked yet
Data coverage Global Not checked yet
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
  • Forecasts, historical and climate data are available through HTTP APIs.
  • Adds air-quality, marine-weather and geocoding APIs.
  • Open-source services and a public endpoint that needs no API key.
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
  • Free API use is limited to non-commercial purposes.
  • Weather alerts are not part of the service.
  • Support channels are documentation and community.
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 →

Open-Meteo provides HTTP APIs for machine-readable weather and location data, aimed at developers who want to request information by coordinate. Its scope includes numerical forecasts, historical weather, climate data, air-quality…

Read the review →
  1. Massive (formerly Polygon.io)Apis Data Services 8.8Free plan
  2. Open-MeteoApis Data Services 7.9Free 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

  • Open-Meteo — where it wins

    • Forecasts, historical and climate data are available through HTTP APIs.
    • Adds air-quality, marine-weather and geocoding APIs.
    • Open-source services and a public endpoint that needs no API key.

    Where it doesn't

    • Free API use is limited to non-commercial purposes.
    • Weather alerts are not part of the service.
    • Support channels are documentation and community.
  • 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 →
  • Open-Meteo7.9/10 · Free plan

    A no-key weather API for developers who need broad data coverage at no cost for non-commercial use.

    Visit Open-MeteoFull 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