Choose Moltern when
You want apps, databases, catalog software and private coding agents in one workspace, with scoped access and organization governance.
Discuss your stack ↗MolternMoltern vs Vercel Sandbox
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Moltern vs Vercel Sandbox
Vercel Sandbox is an execution primitive for untrusted code, integrated with Vercel’s developer platform rather than a complete service catalog.
Flight paths artwork / 56
A working app rarely runs alone. It has data, background work, secrets and people who need access. Vercel Sandbox is an execution primitive for untrusted code, integrated with Vercel’s developer platform rather than a complete service catalog. Compare that starting point with Moltern’s shared workspace before deciding what your team should operate.
Start with the right job.
What Vercel Sandbox is built around
Vercel Sandbox is an execution primitive for untrusted code, integrated with Vercel’s developer platform rather than a complete service catalog.
Review notes & documentation ↓42 · feature dimensions
Look beyond the first deployment.
What is included, what depends on a plan, and what your team must assemble or operate.
42 / 42 · rows shown
| Capability | Moltern | Vercel Sandbox |
|---|---|---|
| Build & deploy | ||
| Git deployments | MolternDocumented Repository, branch and build settings | Vercel SandboxYour team operates it |
| Static sites | MolternDocumented Static and server applications | Vercel SandboxYour team operates it |
| Container workloads | MolternDocumented Application builds and packaged services | Vercel SandboxYour team operates it |
| Background workloads | MolternDocumented Run supported app and service processes | Vercel SandboxYour team operates it |
| Environment separation | MolternDocumented Production, staging, development and preview environments | Vercel SandboxPlan / configuration |
| Deployment history & rollback | MolternDocumented Release history and application rollbacks | Vercel SandboxYour team operates it |
| Services & data | ||
| Packaged service catalog | MolternDocumented Databases, CMS, analytics, automation and more | Vercel SandboxYour team operates it |
| SQL databases | MolternDocumented Database services with service-specific setup | Vercel SandboxSeparate service / integration Use a linked database or storage product |
| Caches & queues | MolternDocumented Deploy supported catalog services | Vercel SandboxSeparate service / integration Use a linked database or storage product |
| Persistent storage | MolternDocumented Workload storage with workspace allowances | Vercel SandboxPlan / configuration Attach durable storage with its own lifecycle Drives |
| Private service connections | MolternDocumented Select targets and runtime connection variables | Vercel SandboxYour team operates it |
| AI service stacks | MolternDocumented Catalog AI services, with workload-specific resources | Vercel SandboxYour team operates it |
| Agent workspaces | ||
| Coding-agent workspace | MolternDocumented Private Codex, Claude Code, Gemini CLI and OpenCode workspaces | Vercel SandboxYour team operates it Install and configure your chosen agent |
| Agent provider sign-in | MolternDocumented Save supported provider sessions or API keys | Vercel SandboxYour team operates it |
| Per-target agent permissions | MolternDocumented Read context or connect to explicitly selected workloads | Vercel SandboxConfirm requirements |
| Browser terminal | MolternDocumented Multiple terminal tabs in private workspaces | Vercel SandboxPlan / configuration Shell or process execution in the runtime |
| Persistent agent files | MolternDocumented Optional persistent workspace, within storage quota | Vercel SandboxDocumented |
| Remote desktop | MolternPlan / configuration Omarchy desktop profile; availability and host capacity apply | Vercel SandboxConfirm requirements |
| Run & observe | ||
| Application & service logs | MolternDocumented Deployment and runtime visibility | Vercel SandboxDocumented |
| Resource monitoring | MolternDocumented Workload CPU, memory and status views | Vercel SandboxPlan / configuration |
| Automatic instance scaling | MolternPlan / configuration Eligible workloads; min/max instances and CPU target | Vercel SandboxYour team operates it |
| Domains & TLS routes | MolternDocumented Application domains and route configuration | Vercel SandboxPlan / configuration |
| Secret handling | MolternDocumented Build/runtime variables; separate use and reveal permissions | Vercel SandboxDocumented |
| Event webhooks | MolternDocumented Workspace event delivery and webhook management | Vercel SandboxConfirm requirements |
| Identity & governance | ||
| Organizations & workspaces | MolternDocumented Shared organization with distinct workspace ownership | Vercel SandboxDocumented |
| Scoped roles & groups | MolternDocumented Environment and resource scopes, groups and expiry | Vercel SandboxPlan / configuration Project or team-level roles; inspect resource scope |
| SAML / OIDC SSO | MolternDocumented Verified domains, provider checks and SSO enforcement | Vercel SandboxPlan / configuration SSO in qualifying organization plans |
| SCIM provisioning | MolternDocumented Synchronize users and groups; grant workload access separately | Vercel SandboxPlan / configuration Directory provisioning under the applicable plan |
| Audit history | MolternDocumented Organization security history and audit exports | Vercel SandboxConfirm requirements |
| Access reviews & approvals | MolternDocumented Review access and protected-action requests | Vercel SandboxConfirm requirements |
| Runtime primitives | ||
| Public sandbox execution SDK | MolternDifferent product scope Public discovery endpoints; no supported sandbox execution SDK | Vercel SandboxDocumented Programmatic environment lifecycle and command execution @vercel/sandbox · vercel.sandbox |
| Platform CLI | MolternDifferent product scope Provider CLIs in agents; standalone Moltern CLI coming later | Vercel SandboxDocumentedsandbox CLI |
| Unrestricted root VM access | MolternDifferent product scope Workload terminals; unrestricted root VMs are not promised | Vercel SandboxDocumentedUbuntu |
| Environment snapshots & restore | MolternConfirm requirements Persistent files; VM memory snapshots are not documented | Vercel SandboxPlan / configuration Verify disk, memory and resume coverage separately Snapshots |
| GPU compute | MolternConfirm requirements AI catalog services; confirm GPU capacity for your deployment | Vercel SandboxConfirm requirements |
| Hostile-code isolation | MolternConfirm requirements Private workloads; review hostile-code isolation requirements | Vercel SandboxDocumented |
| Costs & limits | ||
| Budgets & spend guardrails | MolternPlan / configuration Cost centers, budgets and eligible capped PAYG overages | Vercel SandboxPlan / configuration |
| Capacity admission & quotas | MolternDocumented Workload slots, CPU/RAM and storage allowances | Vercel SandboxDocumented Configure resource size, quota and lifecycle rules |
| Idle lifecycle | MolternPlan / configuration Hobby may sleep; Pro production has no Hobby sleep behavior | Vercel SandboxPlan / configuration |
| On-premises deployment | MolternPlan / configuration Available by arrangement for larger organizations | Vercel SandboxConfirm requirements |
| Billing granularity | MolternDocumented Plan allowances, measured usage and storage views | Vercel SandboxDocumented |
| Backup & recovery responsibility | MolternYour team operates it Service-specific; assign owners and test restoration | Vercel SandboxYour team operates it |
How to read this table
“Confirm requirements” means the reviewed documentation does not establish an equivalent workflow. It does not mean the feature is impossible. Plan and configuration requirements still apply to documented features.
Documented Plan / configuration Your team operates it Separate service / integration Confirm requirements Different product scope
The limits that change the decision.
Check the exact plan and region before committing. Resource limits, lifecycle rules and billing units are different questions.
Capacity & concurrency
Moltern
Apps, top-level services and coding agents count toward workload quota. Agent CPU and RAM are reserved while running; persistent storage uses the workspace pool. Maximum autoscaling capacity must fit available quota.
Vercel Sandbox
Check sandbox creation rate, concurrent running environments, per-environment resources and organization-wide pools separately. More API calls do not necessarily mean more runtime capacity.
Runtime & persistence
Moltern
Hobby services may sleep after inactivity. Pro is intended for production without that sleeping behavior. Persistent agent files survive restarts; running processes and in-memory state are not automatically resumed.
Vercel Sandbox
Vercel documents a five-minute default timeout, a 45-minute maximum session on Hobby and 24 hours on Pro/Enterprise. Persistent sandboxes can resume across sessions; do not confuse one session’s cap with total lifetime.
What goes on the bill
Moltern
Check current in-product plan allowances, measured usage, storage and eligible overages. PAYG has an explicit monthly cap; a budget alert and a hard spending guardrail are different controls.
Vercel Sandbox
Vercel meters active CPU separately from provisioned memory. Creation, network, snapshot storage, drive storage and drive I/O are additional billing dimensions; regional rates and plan allowances apply.
- 01
Map the app and its dependencies.
List repositories, workers, data stores, secrets, domains and who owns each one. Keep an export and a rollback route before moving data.
- 02
Build a staging environment.
Deploy the app, attach only the services it needs, and test routes, persistence, logs and access rules with representative traffic.
- 03
Compare the whole operating cost.
Include build time, runtime, storage, network traffic, AI-provider charges and your team’s operating time. Move production only after recovery and ownership are clear.
Review notes & documentation
Reviewed 26 October 2026 against public product documentation. This is a workflow comparison, not a benchmark, certification assessment or guarantee of feature parity. Linked products, enterprise agreements and self-managed installations have their own terms.
Put it into practice
Deploy the code you own
Connect a repository and branch, review the build and start commands, then set the runtime port and health check. Static sites and web services have different operating needs.
Choose the supporting software
The catalog includes data, automation, AI, monitoring and other packaged software. Read each service guide before deployment and review its configuration and dependencies.
Keep agent access scoped
A coding agent is a private terminal workspace. Choose the provider and grant only the app or service context required. No grant means no private resource context.
Detailed instructions are maintained in the product documentation.
Questions before you start
Can I keep my existing framework?
Use a supported runtime or a Dockerfile. Review the application guide for your build output and server requirements.
Does every service have the same setup?
No. Required variables, dependencies, storage and access differ. The individual service guide explains the setup.
Do I need to change coding agents?
Moltern documents several provider CLIs and a generic terminal workflow. Provider sign-in and usage terms still apply.
Keep exploring
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Start with one useful workload.
Bring your code or choose a service, then give the result a clear operating home.
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