To view Zoho Campaigns pricing, please click here (this would download an excel sheet).
To register for a free Zoho Campaigns version or for a free trail in the Zoho Campaigns paid editions, please click here
For Free Plan:
1) Auto responder feature is not supported.
2) You can associate only one social account in free version, whereas in paid version, you can associate multiple social accounts.
3) In free plan user with Facebook page of less than 200 fans can start the page campaign. If it is more than 200 fans on your Facebook page, you need to get a subscription plan to start the page campaign.