I use Postcoder for address lookups and validation on websites. The lookups prevent errors in manual input and reduce form-fill time. I find it well documented and easy to implement, and the support from real people is really good. It’s an easy-to-use and elegant solution. I use address lookups and validation about equally, and it’s been my preference for a long time as long as I only need UK addresses. I think it’s great.

It's quite easy to set up and use if you are computer literate.

The best thing about Postcoder is the accuracy of its address API and how cost-effective it is.