A flat price per Egg, with egress that never shows up on the bill
Fly.io gives you containers on a global edge, billed by usage with bandwidth metered beyond an allowance. Ruust takes the opposite bet: one flat monthly price per Egg in GBP, unmetered egress on every tier, and every app kept warm around the clock. If you run lots of small, always-on services, you will know your bill before the month starts.
Flat price per Egg, in GBP · unmetered egress · no cold starts
Both run your containers and both are genuinely capable. The difference is the pricing philosophy and how much you operate yourself. Here is how the two line up on the things that tend to decide it.
| Ruust | Fly.io | |
|---|---|---|
| Pricing model | Flat per Egg, per month, in GBP. Presets from £3 to £24, or a custom slider. | Usage-based, typically billed per second for compute, plus volumes and bandwidth. |
| Egress | Unmetered on every tier. No egress line item, ever. | Tends to meter bandwidth beyond a free allowance. |
| Cold starts | None. Every Egg is kept warm 24/7, so no spin-up lag. | Machines can be configured to stop when idle and start on request, adding lag. |
| Currency | GBP, the same price in every region. | Priced in USD, so UK teams also carry FX movement. |
| Reach | eu-west (London) and us-east (Virginia) live, Frankfurt and Singapore coming. | Broad global edge footprint across many regions, a real strength. |
| Operating model | Pick a region and size, connect a repo, live on HTTPS in about two minutes. | More control and more to manage: machines, regions and scaling are yours to tune. |
| Databases | Managed Postgres and Redis database Eggs, private to your project, plus external by URL. | Managed Postgres available, with other data services usually run yourself. |
| Own hardware | BYOH: run the open-source agent on your Linux boxes, £2 per Egg capped £20 per host. | No first-party bring-your-own-host path; you run on Fly's fleet. |
Fly.io details are as we understand them and can change. Always check Fly.io's current pricing and features for the latest.
What you get by switching.
Your bill is a fixed number, not a forecast
Ruust is a flat price per Egg per month in GBP, and it is the same price in every region. Standard is £12 for 1GB and 0.5 vCPU, or size exactly to fit on the slider at £12 per vCPU plus £6 per GB. No per-second meter to model, no invoice surprise at month end.
Unmetered egress means no bandwidth bill
Every tier ships with unmetered egress, so a traffic spike or a chatty API never turns into a bandwidth invoice. Usage-based platforms tend to meter transfer beyond an allowance, which quietly taxes exactly the always-on apps you most want to leave running.
Always-on, so no cold starts
Ruust keeps every Egg warm 24 hours a day. There is no scale-to-zero and no spin-up lag, so the first request after a quiet spell is as quick as the last. That suits background workers, webhooks and low-traffic internal tools that still need to answer instantly.
Less to operate
Connect a git repo (Nixpacks autobuild or your own Dockerfile), choose a region and size, and you are live on HTTPS in about two minutes, with TLS issued in roughly 90 seconds and renewed for you. You get zero-downtime rolling deploys, health checks, replicas and private networking without hand-managing machines.
Where Fly.io is the better fit.
A genuine global edge
Fly.io runs across a broad set of regions and makes it straightforward to place compute close to users worldwide. If low latency for a globally spread audience is your first priority, that footprint is a real, hard-won advantage that Ruust's smaller region list does not yet match.
Fine-grained control
Fly Machines give you low-level control over how instances start, stop and scale, billed by usage. If you want to squeeze cost on bursty or intermittent workloads, or orchestrate machines precisely, that usage-based model can genuinely work in your favour.
Mature and battle-tested
Fly has been running production containers at scale for years, with a deep feature set and a large community. For teams that want maximum flexibility and are happy to operate more of the stack themselves, it is a strong, proven choice.
Ruust vs Fly.io, the common questions.
Is Ruust cheaper than Fly.io?
It depends on your workload, but Ruust is predictable. You pay a flat price per Egg per month in GBP (from £3 Nano to £24 Large, or a custom size), with unmetered egress and no per-second meter. For many small, always-on apps that would otherwise rack up compute-seconds and bandwidth, that flat number usually wins on both cost and peace of mind.
Does Ruust really not charge for egress?
Correct. Egress is unmetered on every tier, so there is no bandwidth line on your bill at any volume. There are per-Egg fair-use rate caps to stop abuse, but nothing meters or caps the volume of traffic you serve.
What about cold starts?
There are none on Ruust. Every Egg is kept warm 24/7, with no scale-to-zero and no spin-up lag, so even a rarely hit endpoint responds immediately. Usage-based platforms often let instances stop when idle to save money, which trades that cost for start-up latency.
Can I run on my own servers?
Yes. With Bring Your Own Host you run the open-source, Apache-2.0 agent on your own Linux boxes. It is pull-based, so Ruust never dials into your host. You pay for the panel, not the metal, at £2 per Egg capped at £20 per host, and egress is unmetered because the pipe is yours.