Yes, both MailerLite and Optiin offer a Free Trial.
MailerLite is designed for Individuals, Freelancers, Large Enterprises, Medium Business and Small Business.
Optiin is designed for Large Enterprises, Medium Business and Small Business.
The starting price of Optiin begins at $7/Month when Billed Yearly, while pricing details for MailerLite are unavailable.
Some top alternatives to MailerLite includes Pipedrive, Campaigner, Moosend and SMTP.
Some top alternatives to Optiin includes Unbounce, Leadpages, Landingi, ClickFunnels, FlyerFunnel, GrooveFunnels, Way, Cloud Funnels, Funnelair and InterFunnels.
