Ephemeral runtime environments
Start clean execution sandboxes for agents, previews, tools, and background work without turning your product into an infra project.
Runtime cloud for agentic products
The PaaS layer for running agents safely at scale.
Caltra is the runtime platform for products that need isolated execution environments, live previews, usage metering, and enterprise-ready controls without building all of that infrastructure from scratch.
runtime ready
caltra run agent-preview
Provision isolated VM
Mount repo branch and secrets
Expose live preview URL
Meter runtime usage
Credit start
$5
Plan
$0/mo
Billing
Usage
Platform
Everything around the runtime, not just a sandbox.
Caltra packages the runtime primitives behind CompanyHelm into a platform surface for teams building agent-heavy products.
Real branches, real previews
Run the actual app from a branch so reviewers can inspect behavior in a browser instead of guessing from logs or diffs.
Designed for tenant boundaries
Keep execution, credentials, artifacts, and review surfaces separated as teams scale from internal agents to customer-facing runtime workflows.
Built for runtime-heavy use cases.
Start with the flows that already make agentic products expensive to operate: isolated execution, branch previews, tools, artifacts, and metered infrastructure.
Agent coding environments
Live preview deployments
Workflow and tool execution
Customer-controlled runtime sessions
Usage metering for runtime-heavy products
Enterprise isolation and support requirements
Transparent pricing
Free to start. Pay only for usage.
Caltra has no paid self-serve plan. New users get credits, then continue on usage-based pricing when their runtime needs grow.
Free + pay per use
$0/month
Start free with $5 in credits. After that, keep using Caltra on metered runtime usage instead of upgrading to a fixed paid plan.
- Every new user starts free with $5 in credits.
- No paid self-serve plan to pick. Add usage only when you need more runtime.
- Enterprise teams can email us for custom agreements, procurement, security review, and committed-volume support.
Enterprise
Contact us by email
For procurement, committed usage, dedicated support, security review, and custom runtime controls, email the Caltra team.
hello@companyhelm.com