Photon is an open-source geocoder built for OpenStreetMap data. It converts addresses and place names into coordinates and back, with suggestions while typing, tolerance for typing errors and reverse geocoding. The software is built on OpenSearch and released under the Apache License 2.0, so organisations can run it on their own infrastructure. Komoot provides a public instance, where heavy use is throttled.
Photon was started by komoot GmbH, based in Schönefeld, Germany. Bending Spoons completed its acquisition of komoot in March 2025, and Bending Spoons is headquartered in Milan, Italy. Because the software is open source, a European organisation can host Photon itself and keep address queries within its own infrastructure, rather than depending on a public interface the provider may change. The public instance is subject to the provider's terms.