There is generally no hard limit to the number of products or services you can list on an eCommerce website. Modern eCommerce platforms are designed to scale to handle catalogs with thousands, tens of thousands, or even millions of listings. The main factors that influence how many products a store can support are:
The eCommerce platform - Some platforms are more optimized and have higher limits than others. Most reputable platforms can handle very large catalogs.
Server resources - More products require more processing, database and storage resources. With sufficient server scaling, large catalogs are feasible.
Product data management - It becomes more difficult to manage and maintain data for a large number of products. Tools can help streamline this process.
Site speed and performance - More products can impact page load times. Caching, CDNs and other techniques can help optimize a large store's performance.
Search and navigation - It becomes harder for customers to find what they need in a very large catalog. Refining search and navigation is important.
While there are no strict limits, eCommerce stores with 10,000+ products do require planning, the right technology choices and operational processes to manage data and maintain a good customer experience.
If you plan to list a large number of products on your eCommerce store, we recommend consulting with an experienced eCommerce agency to help evaluate your specific needs and requirements.