Ask HN: Best Device Detection company?

Anyone here doing device detection for analytics and other processes?

Looking for the most coverage and fastest local implementation.

I have found these 4 companies:-

- deviceatlas.com

- 51degrees.com

- netbiscuits.com

- handsetdetection.com

Can anyone please provide some insights on their experience, which one is the best or perhaps offer some other (commercial) solutions?

Many thanks!