Hey Andrea!
There are several online platforms where you can find language exchange partners, on top of italki:
Tandem - Tandem is a language exchange app that connects language learners with native speakers. It's available for both iOS and Android.
MyLanguageExchange - This is a website where you can find language exchange partners through email, text chat, or voice chat.
ConversationExchange - This is a website that allows you to find language exchange partners based on your location and language preference.
Meetup - Meetup is a social networking platform where you can join local groups to meet people with similar interests, including language exchange groups.
HelloTalk - HelloTalk is a language exchange app that allows you to connect with native speakers for conversation practice.
Some of them require a membership and some you can use for free. Try these out and good luck!