Softwr

Networking · head to head

Prometheus vs Railway

Prometheus logo

Prometheus

Networking

Open source monitoring and alerting toolkit for cloud native environments

From
Free
Rated
-
Full reviewWebsite
Railway logo

Railway

Cloud

Ship software instantly

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Prometheus not suitable for per-request billing as collected data lacks 100% accuracy; Railway plan fees are usage credits rather than allowances, so the $5 Hobby and $20 Pro fees are spent on compute and anything beyond is billed on top
  • They diverge on capability: Prometheus covers Multi-dimensional Data Model, Railway covers Git integration.

Where they differ

Only the attributes on which Prometheus and Railway actually diverge.

Attributes where Prometheus and Railway differ
AttributePrometheusRailway
Pricing modelopen-sourceusage-based
PlatformsLinux, macOS, WindowsWeb, Api, Docker
CategoryNetworkingCloud
Founded20152021

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Prometheus

  • Multi-dimensional Data Model
  • PromQL Query Language
  • Pull-based Collection
  • Service Discovery
  • Alerting Rules
  • Federation
  • Local Storage
  • Grafana

Only in Railway

  • Git integration
  • Zero-config deployment
  • PostgreSQL
  • MySQL
  • Redis
  • Environment variables
  • Custom domains
  • Monitoring

What people use each for

The jobs each tool is most often brought in to do.

Prometheus

  • Monitoring and alerting systemnot Railway
  • Time-series databasenot Railway
  • Infrastructure metrics collectionnot Railway

Railway

  • Deploying applications and databases without managing serversnot Prometheus
  • Running preview environments and services straight from a repositorynot Prometheus

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Prometheus

  • Not suitable for per-request billing as collected data lacks 100% accuracy
  • Hard limit on scrape body size; large responses cause scrape failure
  • Per-scrape sample limit enforced; exceeding limit marks targets as failed
  • Not designed for long-term durable storage; optimised for metrics collection

Railway

  • Plan fees are usage credits rather than allowances, so the $5 Hobby and $20 Pro fees are spent on compute and anything beyond is billed on top
  • The free plan carries $1 of monthly credit and caps a service at 1 vCPU and 0.5 GB
  • Compute is metered per second for both memory and CPU, so cost tracks uptime rather than traffic and an idle service still bills
  • Egress is $0.05 per GB on top of compute
  • The Pro fee is per workspace rather than per user or per project

Pricing, plan by plan

Prometheus

Free
  • Prometheus (Open Source)Free
    • 100% open source
    • Community-driven project
    • Apache 2 License

Railway

Free
  • FreeFree
    • $5 credit/month
    • Community support
    • Unlimited projects
  • Pro$20/month
    • Private repos
    • Priority support
    • Advanced monitoring

Which should you pick?

Choose Prometheus if

  • You need multi-dimensional data model.
  • You want to start without paying.
  • You work on Linux, macOS, Windows.
  • You also want promql query language.
Prometheus review

Choose Railway if

  • You need git integration.
  • You want to start without paying.
  • You work on Web, Api, Docker.
  • You also want zero-config deployment.
Railway review

Questions people ask

Is Prometheus or Railway better?
Neither clearly leads. Prometheus starts at Free and Railway at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Prometheus or Railway?
Prometheus starts at Free and Railway at Free.
Does Prometheus or Railway run on more platforms?
Prometheus runs on Linux, macOS, Windows. Railway runs on Web, Api, Docker.
Can I use Prometheus for free?
Both have a free tier, so you can try either at no cost before committing.
What is Prometheus best used for?
Prometheus is most often used for monitoring and alerting system, time-series database, infrastructure metrics collection. Of those, monitoring and alerting system and time-series database are not what Railway is typically brought in for.
What can Prometheus do that Railway cannot?
Prometheus covers Multi-dimensional Data Model, PromQL Query Language, Pull-based Collection, Service Discovery. Railway covers Git integration, Zero-config deployment, PostgreSQL, MySQL.

Answered from the vendors’ own pages

Prometheus: What does Prometheus cost?

Prometheus is completely free and open source. There are no pricing tiers or paid plans. The entire project is licensed under Apache 2 and hosted on GitHub.

Source
Railway: How much does Railway cost?

Railway's Hobby plan is $5 per month and includes $5 of monthly usage credit. Pro is $20 per month per workspace with $20 of credit included. Enterprise is quoted. Usage beyond the included credit is billed per second.

Source
Prometheus: Is Prometheus commercial software or free?

Prometheus is 100% open source and community-driven. It is a CNCF graduated project with no commercial restrictions or licensing fees.

Source
Railway: Does Railway have a free tier?

Yes, two. A one-time Free Trial gives $5 of credit valid for 30 days, and an ongoing Free plan includes $1 per month with 1 vCPU and 0.5 GB per service, 1 replica and 3 days of log history.

Source
Prometheus: How is Prometheus licensed?

Prometheus is licensed under the Apache 2 License, which permits free use, modification, and distribution for commercial and non-commercial purposes.

Source
Railway: What are Railway's resource limits per plan?

The Free plan allows 1 vCPU and 0.5 GB per service with 1 replica. Hobby raises that to 48 vCPU and 48 GB with 6 replicas. Pro allows 1,000 vCPU and 1 TB per service with 42 replicas and 30 days of log history.

Source
Railway: How does Railway bill usage above the included credit?

Railway charges memory at $0.00000386 per GB per second and CPU at $0.00000772 per vCPU per second, with storage volumes at $0.00000006 per GB per second, plus separate egress and object storage fees.

Source
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