Engineering Notes

What we have learned building live streaming, voice and real-time apps — architecture, costs and the decisions that are hard to reverse. Written for the people who have to ship it, not for a keyword.

Live Streaming Engineering12 min read

How We Cut Agora and ZegoCloud Bills to Zero With Self-Hosted LiveKit

Agora and ZegoCloud charge per participant-minute, which means the month your app finally takes off is the month the invoice stops making sense. LiveKit is open source and self-hostable, so the per-minute line disappears and you pay for servers you control instead. Here is the honest version of that trade — the maths, the architecture, and the cases where self-hosting is the wrong answer.

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