StackPulse detects Sezzle on 51 websites — 0.03% of the 173,900 domains in the index — making it the #4 buy now pay later technology we track. Updated October 27, 2026.
StackPulse currently detects Sezzle on 51 websites, which is 0.03% of the 173,900 domains in the index. The count is refreshed as the crawler re-scans the web.
How do I check whether a website uses Sezzle?
Open the free StackPulse lookup, enter the domain and the buy now pay later section will list Sezzle if its scripts, headers or markup are present. Developers can call GET /v1/lookup/:domain.
Can I download a list of websites that use Sezzle?
Yes. Lead Export filters the index by Sezzle (optionally combined with other technologies) and streams the matching domains as CSV, up to 50,000 rows per file.
What is Sezzle?
Sezzle is a buy now pay later technology. It ranks #4 of 4 buy now pay later technologies by number of websites in the StackPulse index.
Look up any domain by API
One call returns the ecommerce platform, payment gateways, marketing pixels and infrastructure. Results are cached for a week.