MailChimp's Forever Free plan is great if you have less than 2,000 contacts. You can send up to 12,000 emails per month completely free, and you will never have to worry about your plan expiring. A credit card is not necessary to sign up, and you can cancel your account at any time. If you decide to upgrade later on, you can do so easily right from your account. Although MailChimp's free email marketing plan gives you access to the majority of their tools, certain functionalities like autoresponders and spam filter diagnostics are unavailable without an upgrade. All email campaigns delivered through the Forever Free plan will have MailChimp's badge in their footers, though this, too, can be removed with a simple upgrade. Get Details

Benchmark Email's Free for Life plan allows you to send up to 10,000 emails per month, which is far more than what some of the other free plans offer. You get access to all of Benchmark Email's extensive array of features, enabling you to create online surveys, use email templates, and track email statistics. All that's needed to sign up is an email and a password, so you could be up and running in just a few minutes. The only problem with Benchmark Email's plan is that you are only allowed to build your contacts list with users who subscribe through your signup form. If you already have a ready-made list of contacts, it can be a big hassle to get them all to subscribe to your Benchmark Email account, and if this is the case for you, it is probably best to choose another company from this list. Get Details

VerticalResponse's Free plan enables you to send up to 4,000 emails per month and store up to 1,000 contacts. This isn't as many as MailChimp and Benchmark Email offer, but if you don't send high volumes of emails, this plan could still be a good fit for you. An autoresponder tool is included free for a limited time and you can create an unlimited amount of signup forms. You also have the option to connect one Facebook and one Twitter account, which is great if you want to keep up with your contacts on social media. No credit card is required to get started, and if you find you outgrow this plan, you can always update to VerticalResponse's monthly or pay-as-you-go plans. Get Details