http://j5kv55yiu3rneydqn4f35kyhejbq3fhkkm7glg5nbtvxgaxthou7g2ad.onion
Why
not just use Signal? Signal is great, but it requires the whistleblower to download a new app, register with a valid phone number, create a username, and more. While not the largest hurdle, it is still a hurdle, placing requirements on the whistleblower before they can find help.