Hi Colin Paterson,
We do have a Captcha component available in Syncfusion ASP.NET MVC controls of Essential JavaScript 1. However, Syncfusion ASP.NET MVC controls from Essential JavaScript 1 have been deprecated. You can find more details about this in our release notes linked below.
https://help.syncfusion.com/aspnetmvc/release-notes/v20.4.0.44?type=all
Currently, we don’t have a Captcha component in Asp.Net Core. However, we have considered your request as a new component. Also, we don’t have any immediate plans to implement this control. We will prioritize features based on the number of customer votes and value of component for each release. Please upvote this feature to make it a priority. We will schedule this feedback once the feature is included in any upcoming releases.
If you have any specifications/suggestions to the feature request, you can add them as a comment below.
Feedback: https://www.syncfusion.com/feedback/65282/captcha-control-in-ej2-asp-net-core
Regards,
Arun Kumar R