Question 1

Can I use E2B sandboxes inside an AgentSky agent to run untrusted user-generated code?

Accepted Answer

Not through the AgentSky API today. AgentSky agents run in their own isolated environments. If your task requires executing arbitrary user-supplied code in a separately auditable Firecracker microVM with open-source lineage, E2B is the right primitive. The two tools address different layers: AgentSky owns the agent orchestration abstraction above the sandbox; E2B owns the low-level execution environment beneath it. They can coexist in an architecture where AgentSky orchestrates and E2B runs sandboxed code.

Question 2

E2B has launched over 1 billion sandboxes — does that mean it handles agents at greater scale than AgentSky?

Accepted Answer

These measure different things. E2B's 1B+ sandboxes are ephemeral code-execution events, each lasting seconds. AgentSky's 40,835 production tasks (May–August 2026) are multi-step agentic runs averaging minutes to hours each, totaling $141,676 in tracked compute spend. E2B is optimized for high-volume, short-lived code execution; AgentSky is optimized for long-horizon task completion with crash recovery and channel orchestration. They have different SLAs.

Question 3

Does E2B support the same harnesses as AgentSky — Claude Code, Hermes, OpenClaw, and others?

Accepted Answer

E2B gives you a sandbox and SDK, so you can package a harness inside it and own the resulting image, credentials, state persistence, and upgrade cadence. AgentSky ships its supported harnesses as maintained choices behind one API contract.

Question 4

If I already pay for Claude Pro or ChatGPT Plus, can I use that with either platform?

Accepted Answer

AgentSky supports BYO Claude and ChatGPT subscriptions, reducing model cost to $0 for those tiers — you pay only for AgentSky compute and any connectors. E2B is model-agnostic and does not mediate model access at all; you call the model provider directly at their API rates, which are separate from your subscription. BYO subscription savings are an AgentSky-specific feature.

Question 5

E2B is open-source — does that mean I can run it for free?

Accepted Answer

E2B's core runtime is open-source and self-hostable, but operating Firecracker microVM infrastructure has real ops cost. On the managed cloud, the Hobby plan is free with a one-time $100 credit and no card required; compute is $0.0504/vCPU-hr and $0.0162/GiB-hr billed per second, with a $150/month Pro base for higher concurrency limits. AgentSky has no self-host option; sign-up needs no card, and BYO subscription can drive per-task model cost to $0.

	Cloud agent platformAgentSky	Sandbox infrastructureE2B
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

AgentSky vs E2B

How they compare

E2B is the right choice for these workloads

Common questions

The agent and its computer. One API.