Customer Import Best Practices - Maestra Help Center

Preparing your file before import helps you avoid errors and delays when loading customer data. Your file should meet the following criteria:

Up to 20 columns (inclusive).
Fewer than 5% duplicate rows.

Expected speed

If your import file meets the criteria above, you can estimate how long the job will take based on the total number of customers on your project.

Number of customers	Expected speed
50,001 — 99,999	150,000 rows per hour
100,000 — 999,999	300,000 rows per hour
Over 1,000,000	1,000,000 rows per hour

If the import is slower than expected

When a file that meets the requirements is importing slowly, Maestra automatically detects the issue and starts investigating. If the speed stays low for an extended period, reach out to support chat.

​Expected speed

​If the import is slower than expected

Expected speed

If the import is slower than expected