OpenSandbox is a general self-hosted sandbox platform with lifecycle APIs, exec, and configurable isolation under Apache-2.0. Appaloft Agent Workspace also owns a Sandbox—but layers workspace, tasks, collaboration, and freeze → candidate preview → external promote on the same identity (workspaceId equals sandboxId).
Appaloft is an AI application delivery platform whose Agent Workspace uses workspaceId equals sandboxId. Agents work in isolated sandboxes, freeze artifacts, preview candidates, and external principals promote. Secrets must not enter immutable Source Artifacts; sandbox principals cannot promote.
OpenSandbox is a general-purpose sandbox platform for running isolated workloads with lifecycle APIs, exec, agent/eval scenarios, self-hosting, and configurable secure runtimes. It focuses on thin sandbox execution—not a full delivery control plane with promote gates.
| Capability matrix |  Appaloft |  OpenSandbox |
|---|---|---|
| Primary job | Durable coding workspace + delivery control plane | General sandbox platform |
| License / self-host | Cloud and self-hosted delivery paths | Apache-2.0 self-host narrative |
| Isolation model | Isolation as provider/template property | Configurable secure runtime templates |
| Lifecycle API | Workspace + task + collaboration layer | Create, exec, pause, TTL focus |
| Artifact preview | Freeze → candidate preview → external promote | LimitedNot core product boundary |
| Secrets handling | Secrets must not enter Source Artifact | Credential vault / egress injection patterns |
| Promote authority | Sandbox principals cannot promote | Sandbox API consumer decides |
| Deploy integration | Own-server and Cloud deploy control plane | Adjacent integrations possible |
| Fair comparison axis | Workspace reconnect + delivery boundary | Isolated exec and lifecycle |
“Sandbox” covers several product categories. Compare OpenSandbox on isolated execution and lifecycle—not human IDE hosts or agent-bundled sandboxes in the same matrix.
Appaloft
OpenSandbox
OpenSandbox owns sandbox objects with TTL, pause, and snapshot narratives. Appaloft adds workspace, task, collaboration, and promotion on the same identity—the extra layer is workflow, not a new microVM marketing term.
Appaloft
OpenSandbox
Credential vault designs keep real secrets out of guests. Appaloft's shipping hard line is different: secrets must not enter immutable Source Artifacts, and sandbox principals cannot promote. Adjacent threats; neither replaces the other.
Appaloft
OpenSandbox
Compare OpenSandbox on isolated execution and lifecycle. Do not mix Cloudflare Dynamic Workers, Codespaces, or agent-bundled sandboxes into one feature table.
If you only need to run untrusted commands, a thin sandbox API is enough. If you need reconnect tomorrow and refuse self-publish, you need Appaloft's workflow layer.
OpenSandbox can remain your exec substrate while Appaloft owns preview, promote gates, and deploy evidence for coding agents shipping software.
If you only need general isolated exec, OpenSandbox is thinner and often the better fit. If you need reconnectable workspace plus no-self-publish delivery boundary, Appaloft is closer.
No. Isolation is a provider/template property. Do not read “workspace” as “we invented a new microVM.”
Read the Agent Workspace architecture post, then sandbox, preview/promote, and delivery-evidence docs. This page fixes category boundaries.
Appaloft compares as a delivery workspace peer, not as a drop-in replacement for every OpenSandbox deployment topology.
Appaloft SEO pages are organized around real deployment tasks. Each page should lead to the next useful step, not stand alone.
Connect deploy-platform and agent-sandbox comparison pages back to self-hosting, static sites, and AI delivery paths.
Let the agent identify project shape first, then choose the skill, CLI, static publishing, or Cloud console path.
Tie the control plane, CLI, servers, rollback, and Cloud collaboration boundary into one self-hosting cluster.