Most popular with specifications before you invest today, would be:
Aweber: No Free plan but here you may get 30-day FREE trial– Best Deleivarbilty.
Getresponse: No free Plan again they got 30-day Free account too here. The best with price and overall.
Benchmark Email: One of best with FREE forever Plan include 2000 contacts
Ontraport: No free plan they also go free trial-Expensive but Industry best solution choose if you have a good budget for an email system
Sendinblue: Go free account solution and great email marketing service.
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