I appreciate Postcoder's simple API, which was easy to set up and manage. It's valuable because we haven't had to closely monitor it since the initial installation. The service is cheaper than alternatives, and it does the job perfectly. Their support team is great and any issue we have had was resolved quickly.

We need to ensure that customer e-mail addresses are correct. Most errors are typos so using postcoder to check is fantastic, and avoids the annoying need for people to type their address twice (which isn't foolproof anyway)

Up to date Royal Mail database which ensures accurate addresses. API is modern and developer friendly