AgentSky vs E2B — Cloud Agent Platform vs Sandbox Infrastructure
AgentSky vs E2B
E2B provides isolated Linux microVM sandboxes and a Python/JS SDK — you build the agent loop, wire the model, manage state, and write every integration. AgentSky delivers a complete running cloud agent (harness + model + persistent computer + channels) behind a single call. E2B is infrastructure; AgentSky is the agent.
What is E2B
E2B is an open-source sandbox platform that provides isolated Linux environments for agents to execute code, process data, and run tools. Its JavaScript and Python SDKs create and manage those environments; your product still owns the agent loop, model selection, and application integrations.
What is AgentSky
AgentSky is a cloud agent platform — the OpenRouter for agents. One API call picks a harness (Claude Code, Codex, Hermes, OpenClaw and the rest) and a model; AgentSky provisions a persistent, crash-resistant compute environment with optional application connectors and messaging channels on the same call.
Feature comparison
How they compare
| Cloud agent platform AgentSky | Sandbox infrastructure E2B | |
|---|---|---|
| What you get | A running cloud agent — maintained harness, model, persistent state, and channels — behind one API call | An isolated sandbox VM and an SDK; you write the agent loop, wire the model, manage state, and build integrations |
| Time to first agent run | Seconds — pick harness and model, call the API, task is running | Implementation-dependent — build the agent loop, wire the LLM, and own sandbox lifecycle and state |
| State and persistence | Persistent computer that survives crashes, network drops, and closed laptops; resumes mid-task automatically | Sandbox session length is plan-bounded; durable state beyond a session is your application's responsibility |
| Model choice | 8 harnesses paired with any supported model; BYO Claude or ChatGPT subscription reduces model cost to $0 | Model-agnostic — wire any LLM you want; you pay the model provider separately at API rates |
| Channels and connectors | 2000+ built-in connectors (Gmail, Sheets, Slack, GitHub, Linear, and more) declared as add-ons on the same API call | Application integrations are assembled and maintained by your product code |
| Pricing model | Pay per task at list pricing, no card required to sign up; BYO subscription eliminates model cost | Hobby: free, one-time $100 credit, no card required; compute $0.0504/vCPU-hr + $0.0162/GiB-hr; Pro: $150/month |
| Open-source / self-hostable | Managed cloud service; no self-host option | Core sandbox runtime is open-source and can be self-hosted on Firecracker infrastructure |
| Best for | Teams delegating tasks to maintained, crash-resistant agents immediately without building agent infrastructure | Teams building custom agent products that need fast, auditable, open-source execution sandboxes |
When to choose E2B
E2B is the right choice for these workloads
Choose E2B when building a custom agent product that needs open-source, self-hostable sandboxes — for untrusted code execution, custom coding tools, or on-premises deployment. It is also the right choice when your organization requires custom Linux images, specific kernel configurations, or fine-grained sandbox lifecycle control that a managed agent platform cannot expose.
FAQ
Common questions
- Can I use E2B sandboxes inside an AgentSky agent to run untrusted user-generated code?
- E2B has launched over 1 billion sandboxes — does that mean it handles agents at greater scale than AgentSky?
- Does E2B support the same harnesses as AgentSky — Claude Code, Hermes, OpenClaw, and others?
- If I already pay for Claude Pro or ChatGPT Plus, can I use that with either platform?
- E2B is open-source — does that mean I can run it for free?