Thank you for reaching out to us. I can definitely understand the important to being able to grow your list. If you would like to browse through the integrations that are offered, you can visit our Marketplace to see which ones are available. Keep in mind that you can also upload a spreadsheet of your contacts if you are able to get a file of your contacts. Click here to view different ways on how to add contacts into your account. In addition to that, you can also benefit from the Sign-Up Forms that we offer through the account. Click here to view the available options for our Sign-Up Form tools. Please let us know if this information was helpful, if you happen to have any additional questions feel free to reach back out to us.