Yes, both Constant Contact and Replug offer a Free Trial.
Constant Contact is designed for Large Enterprises, Medium Business and Small Business.
Replug is designed for Large Enterprises, Medium Business and Small Business.
The starting price of Replug begins at $15/Month when Billed Yearly, while pricing details for Constant Contact are unavailable.
Some top alternatives to Constant Contact includes Campaigner, Moosend and SMTP.
Some top alternatives to Replug includes Bitly, tothe.link, TinyURL, ClickToTweet, Socxly, Switchy, Linkjoy, MyLinks On Acalytica, Recut and Smartlnks.com.