WSO2 Identity Server might be a bit more popular than SmartSignin. We know about 1 link to it since March 2021 and only 1 link to SmartSignin. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
The sign is bought from a generic commercial site (smartsign.com in the lower corner). Source: over 1 year ago
Try WSO2 Identity Server, it's open source: https://wso2.com/identity-and-access-management/. Source: over 3 years ago
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