How long does the append process take?
We can process most files up to 100,000 input records in 12 - 15 business days (after all information is received and formatted properly). Larger files require a custom delivery quote. The reason it takes us a bit longer is we live verify every record to ensure deliverability and quality.

What type of email yield should you experience?
Your email yield depends on the quality and hygiene of the source file and the size of the companies in your database (propensity to have business emails that match the company's domain). Typically, you will see somewhere between a 15% - 65% yield from most files.

What is ListK's quality guarantee?
ListK stands behind all of our appended files. We consistently deliver 90%+ deliverable emails on our files and stand behind our work (see below.)

What is ListK's policy for hard bounce backs?
ListK stands behind all of its appended files. We offer a full refund for all VERIFIED hard bounces found within the first 30 days of the append being completed. Remember, bounces come in many different forms and may not have anything to do with the email address being correct. Clients send us their hard bounces, the creative used for the send and the specific platform they are using for deployment and we will approve actual hard bounces.

How much does it cost?
Our pricing on most appends is based on a pay-for-performance model plus a small fee for setting-up and processing the file. You only pay for good, verified emails we deliver. Specific price breaks are based on the size of the input file we receive.