Free and open first
Best Apis Data Services in 2026
This category brings together APIs for exchange rates, financial data, weather, address validation, company records, IP information and similar data.
- 18 apps
- Research read 7 Oct 2026
- How the order is worked out
- 1
Apple WeatherKit
Free plan APIiPhoneMac+1 - 2
Abstract API Exchange Rate API
Free plan APIWeb - 3
Alpha Vantage
Free plan APIWeb - 4
EODHD
Free plan APIWebWindows - 5
Finnhub
Free plan APIWeb - 6
Google Maps Platform Address Validation API
Free plan APIWebChoose Google Maps Platform Address Validation API when an application needs address validation, mailing standardization, or deliverability information.
- 7
- 8
OpenCorporates
by OpenCorporatesFree plan APIWebOpenCorporates combines a broad company dataset with API, bulk delivery and OpenRefine reconciliation options.
- 9
People Data Labs
by People Data LabsFree plan APISelf-hostedWebChoose People Data Labs if your team needs API-based person or company enrichment and can work within its credit model.
- 10
Intrinio
Free trial APIWeb - 11
- 12
Massive (formerly Polygon.io)
Free plan - 13
Open Exchange Rates
Free plan Web - 14
NOAA NCEI Web Services
Free plan - 15
Open-Meteo
Free plan Web - 16
Visual Crossing Weather
Free plan Web - 17
SIX Financial Data APIs
Paid Web - 18
#1Places #1, #2, #3, #4, #5 on this list can be bought by the makers of the software on it. See the price
Depending on the product, access may be through the web, an API, iOS, macOS, Android or a self-hosted installation.
Compare the free plan, paid starting price, monthly request limit and rate limit. Review API style, support for historical data, webhooks, official SDKs and data coverage. If you need a trial, verify its length; if you need to read or change code, check the licence.
Questions
Which services list a free plan?
A free plan is listed for Abstract API Exchange Rate API, Alpha Vantage, Apple WeatherKit, EODHD, Finnhub, Google Maps Platform Address Validation API, IPinfo, Massive, NOAA NCEI Web Services and Open Exchange Rates.
Which service lists a 30-day trial?
Open Exchange Rates lists a 30-day trial.
What is the lowest listed paid starting price?
The lowest listed starting price is $12/mo from Open Exchange Rates. IPinfo lists $26/mo when billed annually, Massive $29/mo, Apple WeatherKit $49.99/mo and Intrinio $150/mo.
Which service is listed as free?
NOAA NCEI Web Services uses a free pricing model and lists a free plan.
What should I compare between APIs?
Assess free-plan access, the starting paid price, monthly request and rate limits, API style, historical-data availability, webhooks, official SDKs and data coverage.