If you’re a user of Souq, you probably received an email from Amazon that “Souq is now Amazon.sa,” which of course have been a long time coming, since Amazon completed its acquisition of Souq in March 2017 for $580 million in cash.
Your Souq account will be transferred to Amazon.sa, so if you use the Souq app, you will be asked to download the Amazon.sa app and can use your Souq account credentials to login to Amazon.sa app.
Here’s a the announcement from Amazon;