The Backstage alternative that is a complete IDP.
Backstage is an internal developer portal — it catalogs your services and links out to the tools that do the work. Those tools are still yours to build and run. Atmosly is a complete internal developer platform: CI/CD and GitOps, environment cloning, Terraform provisioning, a Helm marketplace and day-2 operations, on one control plane.
- ✓ Works out of the box
- ✓ Read-only to start
- ✓ No self-host upgrades
Developer portal, or internal developer platform?
Both sit in front of Kubernetes, and the distinction is not marketing. A portal catalogs and links; an IDP owns the delivery underneath it. That single difference decides how much you end up building yourself.
Backstage is the leading open-source developer portal — Spotify's framework for a software catalog, scaffolder templates, TechDocs, and a rich plugin ecosystem.
It is a framework you staff a team to build and run: you write plugins and integrate every backend. And it's a portal — it surfaces and links to your tools; it doesn't provision, deploy, or remediate itself.
- A framework you build & maintain
- Visualizes & links — doesn't execute
- No AI SRE or root-cause analysis
- No built-in security posture or cost
Atmosly is one unified internal developer platform for Kubernetes. Code ships through built-in CI/CD and GitOps; developers clone full environments and provision infrastructure through governed Terraform; and the AI SRE agent, security posture and cost intelligence watch everything that runs.
It's fully managed and agent-based — no self-hosted upgrades to chase. And the SquareOps services team can implement and run it for you.
- CI/CD, GitOps & environment cloning built in
- Terraform provisioning & Helm marketplace
- AI SRE, continuous security posture & cost
- Fully managed — zero upgrade toil
The complete internal developer platform
Everything a platform team would otherwise assemble from six tools — delivery, environments, provisioning, operations, security and cost — shipped as one managed internal developer platform.
Kubernetes CI/CD and GitOps deployment, built in
Pipelines are part of the platform, not a link on a page. Build them visually or declare them as GitOps on Argo — source, build, scan, deploy, promote — with approvals, change windows and one-click rollback on every run.
- Visual pipelines or declarative GitOps — same engine
- Security scan gates the artifact before it ships
- Rollback on every run, full audit trail
Environments, Terraform provisioning and a Helm marketplace
Developers self-serve the things they usually wait on. Clone a full environment — services, env vars, databases and secrets, collision-free. Provision clusters, node groups and cloud resources through governed Terraform. Deploy curated charts from the Helm marketplace, and turn any service into a repeatable golden path with Workload Blueprints.
- Environment cloning — databases and secrets included
- Terraform-provisioned clusters, node groups & add-ons
- Curated Helm marketplace, deployed and tracked
An AI SRE for what's running
When a pod OOMKills or a service crash-loops, Atmosly infers the actual root cause and opens the PR that fixes it — with a full audit trail. Read-only by default, every action reversible.
- Root cause in under a minute, fix proposed
- Read-only by default — every action reversible
- No runbooks to write, no rotation to staff
Continuous posture, not a build-time scan
Always-on scanning against CIS, PCI DSS, SOC 2, and NSA hardening, with audit-ready evidence on demand — watching the live cluster for drift, not just images at build time.
- CIS · PCI · SOC 2 · NSA frameworks built in
- Drift caught on the running cluster
- Audit-ready evidence exported on demand
Cost you can see, leaks closed automatically
Per-namespace and per-workload cost, right-sizing from real usage, and waste detection built in — reconciled to your bill, with guardrails that scale non-prod down on a schedule.
- Cost by service & namespace, reconciled to the bill
- Right-sizing from real usage, not guesswork
- Guardrails scale non-prod down on a schedule
Backstage vs Atmosly, capability by capability
Every capability an internal developer platform needs, side by side — including the places Backstage genuinely wins.
Backstage's strengths are real for the job it's built for. Atmosly's case is scope and managed operations across the whole loop.
What building Backstage actually costs
Backstage is free to download, which is the least interesting fact about its cost. The real number is engineering time — and it is the number most evaluations skip.
Stand it up
Host the app, wire authentication, connect your Git providers and get a first catalog ingesting. This is the fast part, and it is where demos stop.
Write the plugins
Every system you want represented — CI, cloud, monitoring, incidents — needs a plugin adapted or written. This is where the months go.
Keep the catalog true
A catalog nobody maintains is a catalog nobody trusts. Entity files drift the moment they stop being someone's job.
Own it forever
Upstream moves fast. Upgrades, plugin breakage and the platform team to absorb them are permanent, not a launch cost.
Teams routinely describe one to two engineers for six to twelve months to reach a Backstage developers actually use, then ongoing maintenance. Price that against a subscription before concluding open source is cheaper — the alternative to buying an IDP is rarely another product, it is a year of platform work. If you have a funded platform team and a mandate to build, that trade can be entirely right. If you are hoping two engineers can fit it around their roadmap, it usually is not.
Which one is right for your team?
Here's how to decide based on scope and who you want running the platform.
- You want a fully custom developer portal
- You have a platform team to build & run it
- A unified catalog across many tools is the goal
- You prefer assembling best-of-breed backends
- Open-source and bespoke is a requirement
- You want delivery plus AI SRE, security & cost in one loop
- You'd rather not spend engineer-weeks self-hosting a platform
- Continuous compliance posture matters, not just scans
- You want auto root-cause and fix PRs for incidents
- You'd like a partner (SquareOps) to implement and run it
The bottom line: If you want a fully custom developer portal and have a platform team to build and run it, Backstage is the standard. If you want a platform that actually provisions, deploys, and operates — without building a portal first — that's Atmosly.
What teams evaluating Backstage ask
Is Atmosly a good Backstage alternative?
How long does it take to get Backstage into production?
What do we still have to build after Backstage is running?
Do we need a dedicated platform team for Backstage?
Can we get golden paths without building a portal first?
Is there a managed or hosted version of Backstage?
What does a developer actually do on day one?
Does Atmosly replace the catalog?
When is Backstage the better choice?
Which clouds and clusters does Atmosly support?
Will Atmosly lock us in?
Keep what works. Close the loop.
Connect a cluster read-only and watch your deploys, incidents, posture, and spend show up in one place — in minutes. Free, no sales call.