Close.io has been great. It offers a great user experience. With Close.io we can keep all our customers’ emails and phone numbers in one place. This makes things easy, because we can rely on just one source. Unfortunately, it does not have built-in integration. But overall we are very happy with this tool.
We use SendGrid for transactional emails. They lack robust templating tools, and they are not the lowest cost solution on the market. For this reason, we have been looking for a cheaper solution as we send thousands of emails per day and it all adds up. We are considering other options including one from MailChimp, and we have looked into Amazon SES as well.
MailChimp is great. It has a good API as well as a great UI interface that makes it simple to create emails even without technical knowledge. It is also very reliable; we have never had an issue with them.
We found that Sprout Social makes it easy to manage your social media presence across all channels. Also, it can be used by different people in the company and nobody is stepping on each other’s toes.