I’ve been using
Streambox Cloud Sessions, with the macOS Streambox encoder (on a dedicated Mac Mini with a Thunderbolt BMD Mini Recorder box, taking an SDI feed from my main Resolve workstation) for supervised sessions. You pay up front for a minimum fixed amount of data transfer (in my case
around $1200 for 1.2 TB), and you don’t have to pay a monthly subscription fee, in the event that you don’t use it much for a certain month.
The software encoder caps your quality at 6 Mb/sec (and 1080p max resolution), but their codec is so good that a 6 Mb stream is more than sufficient for most review purposes. And unlike many other general purpose streaming systems, Streambox is designed for color accuracy. For what it’s worth, Company 3 uses Streambox, if that matters to you.
I calculated that it costs roughly $2.70 USD per hour, per viewer, using the maximum 6 Mb/sec quality stream.
If your clients are using recent model iPads, this is probably one of the best solutions for color accurate remote streaming, as iPads are very color accurate, out of the box. There’s probably no other commonly used consumer device that is as accurate to 709/P3 as a 2018-2020 iPad or iPhone, so using Streambox with those devices is as generally as close as you can get to having a supervised session in your grading suite.