The best alternatives to oiko are Cocal, Outpost Club, and Mapmelon. If these 3 options don't work for you, we've listed a few more alternatives below.
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Postman Recorder by DevTools— Export Postman APIs from browser
A platform that helps keep contact between travelers. Add the places you have been and the ones you will be in the future. Check what your friends' itinerary is and try to meet them around the globe