Yes, both Siftrock and Poper offer a Free Trial.
Siftrock is designed for Large Enterprises, Medium Business and Small Business.
Poper is designed for Large Enterprises, Medium Business and Small Business.
The starting price of Poper begins at $0/month when monthly, while pricing details for Siftrock are unavailable.
Some top alternatives to Siftrock includes EngageBay, Constant Contact, Campaign Monitor, Salesforce Email Studio, Inbox Mailers, Elite Campaign, Drift, Drift Email, Contactspot and Ackwire.
Some top alternatives to Poper includes and undefined.