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I'm working on an app that requires Rooftop level accuracy coupled with very high volumes. The client would prefer to self-host the solution which might not be a bad idea considering our volume and response time requirements.

I'm not seeing how the usual suspects (Google, MapQuest, ...) might help and the geocodes we get from address correction software are inconsistent quality-wise.

Any pointers or suggestions to vendors and/or solutions are appreciated.

FWIW we're currently using PostGIS.

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It is only as good as the data source: We found Yahoo to be most consistent across the board - based on our address locations. We used FME as a solution but had to slow down the requests. –  Mapperz May 3 '13 at 14:57
Where are your locations based? US? –  Mapperz May 3 '13 at 15:01
Yes, sorry, currently US only. –  Mike May 3 '13 at 20:24

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