You have a spreadsheet of contacts. You need their emails. Data enrichment is the process of adding that missing information automatically.
This post shows exactly how to do it. We uploaded a CSV of 1,000 US CEOs to Claude and got back 893 verified email addresses. No manual research. No copy-pasting.
What Is Data Enrichment?
Data enrichment means adding new data points to an existing list. You start with basic contact information. Then you add verified contact details like email addresses or phone numbers.
The old way required multiple tools. You export from your CRM. You upload to an enrichment tool. You download the result. You re-import everything.
The new way uses Claude with Scalelist connected. You upload your CSV directly in the chat. Claude reads the data, runs the enrichment, and writes the results back into the same spreadsheet.
Ready to try it?
What CSV Format Does the Email Enrichment Tool Need?
Your CSV needs three columns at minimum. You need first name, last name, and either company name or company website.
That is it. Claude handles the rest automatically.
If you have a company website column, use that. Domain names are more reliable identifiers than company names. “Apple” could mean many companies. “apple.com” means one.
How Does the Email Enrichment Process Work?
You upload your CSV to Claude in the chat window. Claude reads all the rows and identifies each contact. It then batches the contacts and sends them to Scalelist for enrichment.
Scalelist searches its verified database for each person. It finds the email address and verifies it in real time using SMTP checking.
The results come back with three status labels. Valid means the address was confirmed deliverable. Risky means an email was found but could not be fully verified. Not Found means no email exists in the database.
What Results Can You Expect from Email Enrichment?
We ran this on a list of 1,000 US CEOs. Here is what came back.
722 contacts received a Valid email address. These are SMTP-verified and confirmed deliverable. 171 contacts received a Risky designation. The email was found but the verification could not confirm delivery. 104 contacts returned Not Found with zero cost for those rows. 3 contacts hit a batch processing error during the run.
That is 893 emails returned from 1,000 contacts. An 89.3% find rate on a cold CEO list.
Add verified emails to your list now.
How Much Does Email Data Enrichment Cost?
The pricing is simple. You pay 1 credit per email found. If no email is found, you pay nothing.
There are no monthly minimums. No bulk purchase requirements. You only pay for results.
For 1,000 CEO contacts, you pay for the 893 emails returned. The 104 not-found contacts cost nothing.
Is This the Same as an Email Append Service?
Email append is the older term for the same concept. You provide a list of contacts and receive email addresses added to that list.
The key difference here is real-time verification. Traditional email append services often return unverified addresses. Scalelist verifies each address before returning it.
The output makes this clear. Each email comes with a status: Valid, Risky, or Not Found. You know exactly which addresses are safe to send to.
What Is the Lead Enrichment Tool Actually Doing?
The lead enrichment tool searches a database of verified professional email addresses. For each contact you submit, it matches first name plus last name plus company domain.
If it finds a match, it returns the email and runs an SMTP check. The SMTP check pings the mail server to confirm the address exists. It does this without sending an actual email.
This is what separates Valid from Risky. Valid addresses passed the SMTP check. Risky addresses were found in the database but the mail server did not confirm delivery.
Frequently Asked Questions
What does contact enrichment mean?
Contact enrichment means adding missing data to a contact record. In this case, it means adding a verified email address to each row in your CSV.
What is an email enrichment tool?
An email enrichment tool takes a list of contacts and finds their email addresses. It matches names and company information against a database to return verified contact data.
What columns do I need in my CSV for data enrichment?
You need first name, last name, and either company name or company website. Website is preferred for better matching accuracy.
What happens if the email is not found?
Not Found contacts cost zero credits. The row stays in your spreadsheet with a Not Found status so you know exactly which contacts had no match.
Can I re-run contacts that errored?
Yes. Any contacts that hit batch processing errors can be resubmitted. In our 1,000-contact test, only 3 contacts encountered errors.
What is the difference between Valid and Risky emails?
Valid emails passed real-time SMTP verification. The mail server confirmed the address exists. Risky emails were found in the database but the server did not respond to the verification check.
Conclusion
Data enrichment used to mean juggling multiple platforms. Upload here, download there, re-import somewhere else.
This workflow keeps everything in Claude. Upload your CSV. Get back a CSV with emails added and verified. No platform switching. No reformatting.
The results speak for themselves. 89.3% of CEO contacts returned an email address. Those contacts would otherwise require hours of manual research.
Try the email enrichment tool today.
