The environment queue that everybody trusts
Shared environments are the scarcest resource in most engineering organisations and the least governed. Realm9 gives them a booking system, an approval chain, an expiry, and an owner.
What breaks without it
The spreadsheet
Someone owns a tab nobody updates. Two teams deploy to the same environment within an hour and spend the afternoon working out whose change broke it.
The forgotten reservation
An environment booked for a two-day test is still held six weeks later. Nobody remembers who owns it and nobody wants to be the one who tears it down.
The invisible bill
Non-production is routinely a third of cloud spend, and almost none of it is attributed to the team or the test run that caused it.
Requests, queues and conflict detection
A request is checked against every other booking before it is granted. Overlaps surface as a queue position, not as a production incident on Thursday afternoon.
- Priority tiers so a release candidate outranks an exploratory test
- Automatic conflict detection across environments, services and data sets
- Requesters see their queue position and estimated start immediately
- Escalation paths when a high-priority booking needs to pre-empt
Approvals that match the risk
A developer taking a sandbox for four hours should not need a change advisory board. A team holding pre-production across a release freeze should. Policy decides which is which.
- Route by environment class, duration, cost or blast radius
- Auto-approve the routine so reviewers only see what matters
- Standing approvals for recurring bookings such as nightly regression
- Every decision recorded with who, when, and on what grounds
Leases expire. Capacity comes back.
Nothing is held forever. Every booking carries a TTL, warns its owner before it lapses, and returns the environment to the pool automatically if nobody renews it.
- Configurable warning windows and self-service extension
- Automatic teardown for ephemeral environments, hand-back for shared ones
- Idle detection so an environment nobody is using is flagged early
- Reclaim history so you can prove the capacity was actually recovered
The Realm9 edge
Dedicated environment-orchestration and self-service IaC platforms provision on request. Realm9 adds a booking layer on top — so environments are reserved, queued and reclaimed, not just spun up.
| Capability | Realm9 | env0 | Spacelift | HCP Terraform |
|---|---|---|---|---|
| Environment booking, queueing & conflict detection | Native calendar with priority queues and automatic conflict detection — every environment is reserved ahead of time, not just requested when needed | No native booking system — environments are provisioned on demand from a template, with no reservation, queue or conflict check before provisioning | No booking or queue model — Spacelift stacks run per trigger (VCS push, scheduled task or API call), so nothing is reserved in advance by a team | No booking system — HCP Terraform workspaces are simply provisioned when a run is triggered, with no queue or advance reservation concept |
| Automatic reclaim tied to the booking record | TTL-based auto-release configured per environment, tied directly to the same booking record — no separate schedule to maintain and no forgotten reservations left running | env0's TTL settings cover deploy/destroy scheduling for an environment, but are not aware of any underlying booking or reservation record | No built-in TTL reclaim in Spacelift — teams rely on scheduled runs, webhooks or external automation scripts to tear down idle stacks | HCP Terraform has no native TTL reclaim for workspaces — idle workspaces keep running resources until someone manually destroys them |
| Native on-prem & hypervisor provider support | First-class Proxmox and VMware vCenter connections sit alongside AWS, Azure and GCP — no bolt-on workers or custom glue code required | env0 is cloud-focused (AWS, Azure, GCP, Kubernetes) with no native hypervisor support for on-prem virtualization platforms | Spacelift reaches on-prem only through self-hosted workers, with no native vCenter or Proxmox provider shipped out of the box | HCP Terraform supports cloud plus limited on-prem reach via community-maintained Terraform providers, with no native hypervisor integration |
| Cost and booking recorded in one ledger | Booking, approval and spend attribution are recorded together on the same record — one ledger to audit, not three disconnected systems | env0 shows cost estimates per environment, but they are kept separate from any booking or reservation record | Spacelift's cost estimation comes via an Infracost integration, disconnected from the environment's lifecycle or booking history | HCP Terraform's cost estimation runs through a separate HCP module, disconnected from the workspace's lifecycle and booking history |
| Approval requirement tied to the environment itself | Approval requirement is a property of the environment itself — configured once and enforced automatically on every booking against it, with no separate gate to maintain | env0 approval gates are configured per environment or template via workflow settings, requiring ongoing upkeep as templates change | Spacelift enforces policy-based approvals via OPA at the plan, approval or push stage — powerful, but configured per policy rather than per environment | HCP Terraform enforces policy-as-code (Sentinel or OPA) approval gates on runs, again configured at the policy level rather than tied to the environment record |
Sources: env0, Spacelift and HCP Terraform product documentation and the Spacelift 'env0 vs Spacelift' comparison (spacelift.io/blog/env-zero-vs-spacelift), reviewed 2024. Feature availability changes — verify against current vendor docs before quoting.
Give every shared environment an owner and a process
Environment Management works alongside Infrastructure Management and FinOps, so the environments you book can be provisioned and costed in the same platform.