If you're looking for anonymous online help, there are a few options. 7 Cups offers a large mental health community with 24/7 live chat with trained volunteer listeners, support groups and online therapy with licensed therapists. It's available on iOS and Android devices so you can get help wherever you need it.
Another good option is Lily, an AI-powered therapist that offers 24/7 confidential help through a web interface and text messages. Lily uses voice-activation technology and tracks your history over time, so it can offer a more personalized approach to mental health issues like anxiety and self-esteem.