If your company is planning to host an event or send out seasonal greetings for the holidays, digital cards and invitation services are an easy and often inexpensive (not to mention eco-friendly) way to communicate with your clients, associates, and employees. Here we’ve examined five popular, free services: Paperless Post, Eventbrite, Evite, Red Stamp, and Cardmon.

In general, we found that Paperless Post offers the most robust service, whether you're planning an event that requires registration or RSVPs, or simply sending a good looking holiday card. Eventbrite and Evite are also your best bets for event planning, while app-only services Red Stamp and Cardmon give you easy options to customize greeting cards with photos from your mobile devices.

Here's the rest of our rundown:

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