I don’t know if I can name them here, because Fiverr might not like it…
But you can easily find the other platforms, because they are everywhere. Each country has its own, and there are some are very popular with local clients.
Most important is: don’t just wait for Fiverr to find the customer for you. It’s very important to do lots of work each day, to promote and reach people who might need you!
Sometimes I say that my job is actually 90% working on things that are not voiceover… then maybe 10% of the time I am making voice recordings… haha
That’s the freelance life, in fact.