The Smarter Way to
Clean & Enrich
Your Data.
Upload your list — let ListCatalyst validate, append, and deliver a production-ready file in minutes.
Every Append Service You Need
One platform — clean, validate, and enrich with any combination of our services.
NCOA
Clean & standardize postal addresses with USPS move-update processing.
Postal Append
Fill missing addresses via VIN, email, or phone match for maximum deliverability.
Email Hygiene
Verify deliverability and reduce hard bounces before you hit send.
Contact Append
Append up to 3 phones, emails & cell numbers per record automatically.
MAIDs
Append raw or hashed mobile advertising IDs for digital targeting.
Demographics
Age, income, home ownership, credit score, and 300+ additional fields.
Auto Data
Instantly append year, make, model, and VIN for automotive campaigns.
Reanimation
Revitalize dormant lists with fresh contact & postal info to re-engage leads.
How ListCatalyst Works
From upload to download in three simple steps.
Create an Account
Sign up or contact us to unlock the full suite of hygiene and append services.
Upload Your File
Our wizard guides you through uploading and selecting the exact services you need.
Download Results
Receive a cleaned, appended file and a clear PDF report ready to use.
Built for Serious Marketers
Increase Campaign ROI
More good data means better reach, higher conversions, and bigger results for every campaign you run.
Compliance & Security
Files are encrypted and processed with enterprise-grade security. We never resell your data — ever.
Real Human Support
US-based experts ready to help with any list, question, or campaign challenge — no bots.
Ready to clean your data?
Join ListCatalyst and start appending in minutes — no complicated setup, no hidden fees.
Create Your Account