Hi, creator of clipbot.tv here so I can give some data / insights. Source: about 2 years ago

I use castr.io, which is a little less expensive than restream imho. I'm on their Multistream Plus plan, which allows up to 2 concurrent streams and multistreaming to up to 5 destinations. I think they charge $12.50/mo, but I've been getting it for less on an annual plan because they offered a special discount during the holidays. Source: over 1 year ago

We're going to broadcast this PPV through castr.io (looking at 1080p) and I'm currently using an ATEM Mini Pro Extreme ISO (HDMI Inputs). Source: over 1 year ago

Https://www.100ms.live/ Super low-latency livestreaming API with premium pricing https://castr.io/ All-In-One, ok pricing https://www.api.stream/ Good, pay as you go pricing https://liveapi.com/pricing/ Good, pay-as-you-go pricing https://www.simplelive.co/livestream One click embeded live stream start-up, pricing seems to good to be true * Example repo which used Jitsi for livestreaming to thousands:... - Source: Hacker News / over 1 year ago

I personally use castr.io which combines them into one chat, however it can be buggy sometimes and not always be the most dependable. I would love to know of other options to pull this off as I multistream myself (even though I am a twitch affiliate). Source: over 1 year ago

You'd be using something else to push simultaneously to YouTube and Twitch. OBS can send RTMP to 2 destinations, or you can use a dedicated service like castr.io or restream. Both take in a single RTMP, and send it to multiple locations. Source: about 2 years ago