Layer 5 · self-hosting reality check
What it actually takes to self-host BigBlueButton
The docs say 8 GB. In practice you want 16 GB — this is the documented production minimum, not a suggestion. Here is the honest version — real requirements, real monthly cost, what you will be maintaining, and the one thing that catches people out.
Usually reached from Zoom alternatives, where BigBlueButton is one of the picks.
Wondering whether you need to at all? Is Zoom free? — what the free tier actually allows, and where the wall is.
| RAM — documented minimum | 8 GB |
|---|---|
| RAM — what it really needs | 16 GB — this is the documented production minimum, not a suggestion |
| CPU | 8 vCPU |
| Disk | 500 GB if you record sessions |
| Monthly cost | $80–160/mo — it is the heaviest tool in this catalogue |
| Setup time | 4+ hours, and it wants a dedicated machine |
| How you install it | The official install script on a specific Ubuntu version — deviating is not supported |
| Ongoing maintenance | High. It is a large stack and the upgrade path is version-specific. |
| Where it stops scaling | 100+ participants per session on properly sized hardware, with scalelite for multiple servers. |
The thing that catches people out
BigBlueButton requires a dedicated server and the installer means it — it takes over ports, firewall rules and the audio stack, and it explicitly does not support sharing the machine with other services. People try to install it alongside an existing web server and spend an evening discovering that is not a configuration problem, it is unsupported by design.
When not to self-host BigBlueButton
You are not running education-style sessions. BBB is built around teaching — breakout rooms, whiteboard, polls — and it is heavy for anything simpler.
Every guide here carries this section. A site that only ever tells you to self-host is selling something — the useful answer is sometimes no.
Other Layer 5 self-hosting guides
- Self-hosting LibreOffice2 GB with a large spreadsheet open
- Self-hosting ONLYOFFICE6 GB for the Document Server with a handful of concurrent editors
- Self-hosting Collabora Online4 GB, and roughly 1 GB per 20 concurrent documents
- Self-hosting CryptPad2 GB for a small instance
- Self-hosting Mattermost4 GB for a team of 50 with PostgreSQL on the same box
- Self-hosting Rocket.Chat6 GB with MongoDB on the same machine
Common questions
- How much RAM does BigBlueButton actually need?
- 16 GB — this is the documented production minimum, not a suggestion in practice. The documented minimum is 8 GB, which is the figure at which the process starts rather than the figure at which it works under real use. 8 vCPU alongside it.
- What does self-hosting BigBlueButton cost per month?
- $80–160/mo — it is the heaviest tool in this catalogue This is commodity VPS pricing and excludes your time, which is the larger cost for most people — budget for high. It is a large stack and the upgrade path is version-specific.
- How long does it take to set up BigBlueButton?
- 4+ hours, and it wants a dedicated machine, via The official install script on a specific Ubuntu version — deviating is not supported.
- When should I NOT self-host BigBlueButton?
- You are not running education-style sessions. BBB is built around teaching — breakout rooms, whiteboard, polls — and it is heavy for anything simpler.
- What is the most common mistake when self-hosting BigBlueButton?
- BigBlueButton requires a dedicated server and the installer means it — it takes over ports, firewall rules and the audio stack, and it explicitly does not support sharing the machine with other services. People try to install it alongside an existing web server and spend an evening discovering that is not a configuration problem, it is unsupported by design.