ANSWER:

If these are Islamic and don’t display the photos of women and don’t give direct access to them, this is permissible. 

Are Muslim marriage sites permissible to use for finding a wife?

Fiqh of Marriage | December 11, 2018 8:03 am
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A righteous guy is asking for my brother’s contact number to marry me. He seems to be nice but i’m not sure if I like the way he looks. Now he is asking for me to quickly tell him if i consider him so he could call my brother. He lives abroad, and I’m not completely sure about his lifestyle. No one knows Ive contacted him over internet regarding marriage. What should I do?
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Sheikh, can i make it a condition in my marriage contract that my husband doesn’t remarry as long as I’m in his nikah? I know he doesn’t need permission before remarrying the second wife, but I do not want my husband to have a second wife as long as I’m with him.