Honestly, no. Both Google and Bing's APIs are too restrictive, even in paid mode. They basically require that you show a Google/Bing map in conjunction with the lookup, which isn't something a lot of people want to do.
Admittedly a lot of people don't read these fine prints, but they are overly restrictive for a lot of uses.
I looked at various services to do postcode/zip to lat/long and eventually settled on just doing it in-house using downloaded data. After a bit of data massaging it actually works really well.
What do you mean by "settled on just doing it in-house using downloaded data”? Did you build your dataset completely by yourself by parsing data from Google and saving it?
Admittedly a lot of people don't read these fine prints, but they are overly restrictive for a lot of uses.
I looked at various services to do postcode/zip to lat/long and eventually settled on just doing it in-house using downloaded data. After a bit of data massaging it actually works really well.