Italiarail

The largest global seller of train tickets in Italy. Italiarail is the expert in seamless train travel within Italy Guaranteed lowest prices 24-hour customer support ItaliaRail.com offers an exclusive luggage service as well as discounted sightseeing and hotels Multi-currency payment options Instant electronic ticketsSpecial group rates for students and educators that are up to 80% off the regular price It's possible to buy tickets around Italy from €9.90/€19.90/€29.90 from italiarail.com who connect directly to the Trenitalia ticketing system.Customers can also buy in €, £ or $.

Booking opens 180 days ahead for most long-distance trains in Italy, except when the mid-June & mid-December timetable changes intervene.  All international credit cards accepted, and customer either just quote their booking reference on board the train. www.italiarail.com is easier to use, all in plain English with English-language place names - and it can be cheaper then Trenitalia.com if there are 2 or more of you.  

After recent improvements it's a better system than Trenitalia in many ways:  It shows a whole day's trains in the search results not just an hour or two, it can book up to 20 people at a time, Trenitalia only books up to 5 people, it highlights the cheapest trains and trains where 1st class is cheaper than 2nd as a free upgrade. Although www.italiarail.com accesses exactly the same prices as Trenitalia, it can be cheaper for 2 or more people travelling together because it can combine the last remaining tickets at a cheaper price level with tickets at a higher level within the same booking.  Trenitalia can't, so will ignore any remaining tickets at the cheaper price level if there aren't enough for all the passengers travelling.