Snowplow

With Mailchimp you can send newsletters and automated emails. You can build your email list with form or import your known contacts. Mailchimp offers pre-designed email templates and a drag and drop email builder.

SendGrid provides and manages an email server on your company's behalf, so your communications with customers are reliably sent and delivered as needed. It's perfect when you need to send transactional emails, password recovery emails or notifications to users from your website.

Zendesk is a customer support tool. It's got 2 main features: ticketing and knowledge base. Ticketing: Zendesk gathers customer queries in one place where you can manage and respond to customer questions efficiently. Knowledge base allows you to create an FAQ section to guide your customers.

Unbounce

Unbounce helps your small business get more from every click—create and optimize landing pages that prompt your visitors with one, focused goal instead of leaving them to wander a site full of distractions.

Optimizely offers powerful, easy to use solutions, to test what messages, imagery, and offers help increase conversion, retention, and lifetime value.