Rock8Cloud
The guaranteed-performance Fly.io alternative

Rock8Cloud vs Fly.io

A shared vCPU is 6.25% of a core. Ours is all yours.

Fly's shared machines get 5 ms of CPU per 80 ms period and are throttled once the burst balance runs out. That is cheap right up until your workload needs the core. Rock8Cloud reserves your plan's CPU and memory for you, always on, with AI code review, sandbox agents and logs & health included. 30 days free, no card.

Start 30 days freeSee the comparison
Savings calculator

See how much you saveby moving to Rock8Cloud.

Tell us about your team and your stack. We price it on Fly.io's public price list and on a flat Rock8Cloud plan, line by line.

You can calculate your own usage with the sliders below. Here are some example stacks running on Rock8Cloud to start from.
TanStack web0.25 vCPU · 512 MiBPublic API · Elysia0.5 vCPU · 1 GiBAdmin API · Elysia0.25 vCPU · 512 MiBJobs worker0.25 vCPU · 512 MiBApp databasePostgresJob queueRedisUploads bucketObject storage

1.25 vCPU + 2.5 GB across 4 services · 1 Postgres · 1 Redis · 5 GB storage · 100 GB egress

Make it your stack

Every setting below is yours to change. Match it to your team and what you actually run.

5
1.25 vCPU
2.5 GB
1
1
5 GB
100 GB

Your stack takes 1.75 vCPU + 3 GiB from our pool, Postgres and Redis included. Whatever the plan doesn't cover becomes fixed-price add-ons, never metered usage.

Rock8Cloud plan
Fly.io
  • Platform and seatsNo platform or seat fees source
    €0
  • Performance machines2 dedicated vCPU + 4 GB in Amsterdam, all month source
    €60.97
  • Managed Postgres × 1Basic at $38 plus storage source
    €34.07
  • Upstash Redis × 1Fixed 250 MB at $10, on the Fly invoice source
    €8.90
  • Tigris object storage5 GB, first 5 GB free, then $0.02 source
    €0
  • Egress100 GB at $0.02 per GB from Europe source
    €1.78
  • AI code reviewCodeRabbit Essentials, 5 × $30 source
    €133.50
Per month€239.22
Rock8Cloud
  • Mercury plan1 vCPU + 2 GiB pool, flat price
    €20
  • CPU add-ons3 × 0.25 vCPU at €2.10
    €6.30
  • Memory add-ons4 × 256 MiB at €0.60
    €2.40
  • Team seats5 developers, unlimited members
    €0
  • Postgres × 10.25 vCPU + 256 MiB each, from the pool
    €0
  • Redis × 10.25 vCPU + 256 MiB each, from the pool
    €0
  • Object storage5 GB of the 5 GB included
    €0
  • Egress100 GB, no per-GB fee
    €0
  • AI code reviewEvery pull request, from the €5 monthly AI budget
    €0
Per month€28.70
Fly.io€239.22 /mo
Rock8Cloud Mercury€28.70 /mo

You keep €210.52 a month, €2,526.24 a year.

Estimates for one month, excluding VAT. Fly.io performance machines in Amsterdam, running all month, one Managed Postgres Basic cluster per database and Upstash Fixed 250 MB per Redis. AI code review on their side is CodeRabbit Essentials at $30 per developer, billed monthly. Ours draws from the plan's AI budget, and larger teams can top it up anytime. Prices as of October 2026, USD converted at $1 = 0.89 €. Fly.io pricing · Managed Postgres · Upstash on Fly · CodeRabbit pricing

What you work around
6.25% CPU quotaThrottled after burstPer-machine billingA config file to learnCard required to startNo AI code review
Rock8Cloud

A reserved pool, not a slice. Your plan's vCPUs and memory are yours around the clock.

100% of the core

Side by side

A slice of a coreagainst the whole thing.

Fly documents exactly what a shared vCPU gets, and it is a sixteenth of a core before burst. Rock8Cloud reserves the capacity your plan names, so the price you compare is for performance you actually keep.

Fly.io
Rock8Cloud
CPU you actually get
A shared vCPU is a 6.25% slice - 5 ms per 80 ms period, throttled when the burst balance is spent source
Your plan's vCPUs are reserved for you. Full performance, no quota to manage
Comparable machine
performance-1x with 2 GB is $34.25 a month in Amsterdam source
Mercury is €20 a month - a 1 vCPU + 2 GiB pool with build minutes and a €5 AI allowance inside
Pricing model
Per machine, per region, per volume, summed on the invoice
One plan price for a pool your services share
Deploy model
Machines and a config file, powerful once you learn it
Push the repo, get a live URL. No config to learn
AI code review
Not part of the platform
Included on every pull request
Coding agents
Not part of the platform
Sandbox agents build tasks and open pull requests, AI allowance included
Agent context
An agent can drive the hosting. Reviews and tasks live elsewhere
One platform over MCP - code, reviews, deploys and runtime in one context
Global placement
Runs your app close to users in dozens of regions - real edge strength
We run EU data centres and put the money into your reserved pool instead

Fly.io figures as of October 2026, Amsterdam region: shared-cpu-1x from $2.27 a month with 256 MB, performance-1x with 2 GB at $34.25 a month after the October 1 memory price rise to $6 per GB. The shared CPU quota is 5 ms per 80 ms period. Fly.io pricing · CPU performance docs

Free migration

Moving off Fly.io? We migrate you for free.

Our engineers move your services to Rock8Cloud with you - apps, databases, environment variables and domains. It costs nothing and there is no commitment. Tell us what you run and we bring it over together.

DiscordAsk on Discordsupport@rock8.cloud
Without leaving your agent

Migrate from inside your AI agent.

Rock8Cloud speaks MCP. Point your agent at it and it does the whole move - provisions Postgres and Redis, sets your config, and ships your app. That same agent reviews every PR and builds tasks in sandboxes once you're moved over. You stay in your editor, the agent does the wiring.

your agent
create_projectcheckout-api
provision_postgresready in 8s
provision_redisready
deploy_servicelive
Ready to ship

Stop rationing milliseconds.Reserve the core.

Start free for 30 days, no credit card. A reserved pool at one plan price, with the AI lifecycle included.

Start 30 days free

Coming from Fly.io? Connect your agent over MCP and it does the whole move.