We currently run two graphhopper routing servers in production for our bike route mapping website. They work fantastic and are fast even without the contraction

We currently run two graphhopper routing servers in production for our bike route mapping website. They work fantastic and are fast even without the contraction hierarchies tricks used to speedup routing at the expense of flexibility. We occasionally get user reports of odd routing anomolies due to the underlying data, but they are actually not much more frequent than reports about google maps. I also evaluated osrm but the graphhopper folk run a great open source project. Felt much more comfortable throwing in with them than anyone else. Happy to share any details if anyone has questions, email in my profile.