Pelias is an open-source geocoder built on Node.js and Elasticsearch. It supports numerous open-data projects out of the box and also has robust support for custom data.
Mapzen Search is a tool in the Mapping APIs category of a tech stack.
Mapzen Search is an open source tool with 1.63K Github Stars and 142 Github Forks. Here’s a link to Mapzen Search's open source repository on Github
Here’s a list of reasons why companies and developers use Mapzen Search.