locize is the alternative to Transifex.
If you want to migrate your data from Transifex to locize, this following guide will help you with the process.
Download your localization files
You will first need to download your translations from Transifex:
Log into your Transifex account
Click on "Dashboard"
Select the project you want to migrate by clicking on the project’s name
Click on "Resources"
Download the translation files via "Download all translations (ZIP)"
Extract the ZIP
Sign up and create a project
If you haven’t done already, you should create your free trial account and create your first project.