Legally Valid Electronic Contract

[Strick92]

Hello, I know that there are lawyers on the forum, so I wanted to gather information on the subject. There is a venture called HelloSign at https://www.hellosign.com/. You prepare your contract, upload it here, specify where to sign on which pages. Then an email is sent to the signatories, who electronically sign the contract by clicking on the link. The legality page is here: https://www.hellosign.com/info/legal. According to the information provided, the signatures have legal validity at international standards. Can we be sure that Turkish courts will accept the contract in case of any disputes? Do you have any information on this issue? Additionally, a nice aspect of the system is that it allows for a certain number of contracts per month to be signed for free.