Layer 5 · self-hosting reality check
What it actually takes to self-host Insomnia
The docs say 256 MB. In practice you want 700 MB as an Electron app. 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 Postman alternatives, where Insomnia is one of the picks.
Wondering whether you need to at all? Is Postman free? — what the free tier actually allows, and where the wall is.
| RAM — documented minimum | 256 MB |
|---|---|
| RAM — what it really needs | 700 MB as an Electron app |
| CPU | Any modern CPU |
| Disk | 600 MB installed |
| Monthly cost | $0 — it runs on the machine you already own |
| Setup time | 10 minutes |
| How you install it | Desktop installer; choose the Scratch Pad at first run to stay local |
| Ongoing maintenance | None beyond updates, but check each release for account requirements. |
| Where it stops scaling | Any single-user or small-team workload. Collections are files and the app does not slow with their size. |
The thing that catches people out
Insomnia's 2023 releases made an account mandatory to use the app and stored data in the cloud by default, which is precisely what a lot of its users had left Postman to avoid. Later versions restored a local-only Scratch Pad, but the episode is why teams that value local-first now default to Bruno. If offline and account-free matters to you, verify it in the version you are installing rather than trusting the reputation.
When not to self-host Insomnia
Account-free local operation is non-negotiable and you do not want to re-check it at every upgrade. Bruno makes that guarantee structurally.
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 Insomnia actually need?
- 700 MB as an Electron app in practice. The documented minimum is 256 MB, which is the figure at which the process starts rather than the figure at which it works under real use. Any modern CPU alongside it.
- What does self-hosting Insomnia cost per month?
- $0 — it runs on the machine you already own This is commodity VPS pricing and excludes your time, which is the larger cost for most people — budget for none beyond updates, but check each release for account requirements.
- How long does it take to set up Insomnia?
- 10 minutes, via Desktop installer; choose the Scratch Pad at first run to stay local.
- When should I NOT self-host Insomnia?
- Account-free local operation is non-negotiable and you do not want to re-check it at every upgrade. Bruno makes that guarantee structurally.
- What is the most common mistake when self-hosting Insomnia?
- Insomnia's 2023 releases made an account mandatory to use the app and stored data in the cloud by default, which is precisely what a lot of its users had left Postman to avoid. Later versions restored a local-only Scratch Pad, but the episode is why teams that value local-first now default to Bruno. If offline and account-free matters to you, verify it in the version you are installing rather than trusting the reputation.