Geokeo geocoding service- with 2500 free api requests daily.
Geokeo API is a free Geocoding API that requires no API key, is served over HTTPS and supports CORS, so it can be called from the browser.
Geocoding service an alternative to google geocoding api
Details from geokeo.com.

Unified API suite · now live
Geocode an address, validate an email, track a flight or pull stock data with one account, one dashboard and one API key.
The Geokeo API is provided by Geokeo Home (geokeo.com). Geocoding service an alternative to google geocoding api
Yes. The Geokeo API is listed in the Geocoding category of the public-apis directory, which only includes APIs that are free or have a free tier. Check its documentation for rate limits and paid plans.
No. The Geokeo API requires no authentication, so you can start making requests without signing up.
Yes. The Geokeo API supports CORS, so front-end JavaScript can call it directly.
Yes. The Geokeo API is served over HTTPS, so it's safe to use in production.