Venezia / Venice / Venedig to Firenze / Florence by train

ItaliaRail lives up to its name by selling tickets for rail journeys within Italy and the core feature of its service is that it is primarily designed to be used by international visitors to Italy.
So the English translations of place names are used when looking up journeys and the terms and conditions for using each type of ticket are clearly explained.
It also clearly points out the additional costs of upgrading to other classes and types of tickets while spelling out the additional benefits of doing so.

Users of InterRail and Eurail passes can also book seat reservations on the Frecce and InterCity trains without paying a booking fee,

Trenitlalia is the national rail operator in Italy and in addition to its cheaper types of ticket; it also typically offers other discounts available to non-Italians, which include:

• Group Offers, provides for a discount of up to 50% when 3-5 Adults travel together.
• Family Offer for when groups of 2 - 5 people are travelling together and at least one of the party is a aged 11 and under.
• The Children Free Offer is available for journeys by Frecce trains, when groups of 2 - 5 people are travelling together and at least one of the party is a aged 15 and under.
  Those aged 15 and under travel for free, but the Adults will need to purchase full price 'Base' tickets.

Omio is an online ticket agency which offers tickets for rail journeys in France, Germany, Great Britain, Italy and Spain.

The three key advantages of using Omio are

• it offers prices in multiple currencies
• it usually offers price comparison with other modes of travel including flights and buses
• when visiting Europe, you can book journeys in multiple countries in one transaction.

The disadvantage of booking with Omio is that it often adds a booking fee to the final price; therefore when it does so without offering a price advantage, SMTJ doesn't tend to offer Omio as a booking option.

Italo trains compete with the Frecce services, provided by the national rail operator, Trenitalia, on the high speed routes which link major cities in Italy.
The Italo booking site only sells tickets for journeys by its trains.

Omio is an online ticket agency which offers tickets for rail journeys in France, Germany, Great Britain, Italy and Spain.

The three key advantages of using Omio are

• it offers prices in multiple currencies
• it usually offers price comparison with other modes of travel including flights and buses
• when visiting Europe, you can book journeys in multiple countries in one transaction.

The disadvantage of booking with Omio is that it often adds a booking fee to the final price; therefore when it does so without offering a price advantage, SMTJ doesn't tend to offer Omio as a booking option.

Happy Rail is a Netherlands rail ticket agency which sells tickets for both national and international journeys within a range of countries including Belgium France, Germany, Sweden, Switzerland.

HappyRail doesn't charge booking fees in the conventional sense, but if you're not Dutch you can expect to pay additional transaction fees, which will be added to the total cost.
That's because the most common form of online payment used in The Netherlands is 'iDEAL' and HappyRail doesn't charge a transaction fee for 'iDEAL' payments, but only Dutch residents can sign up to 'iDEAL'.
Other forms of payment include Visa debit cards will incur a fee.