Agent sandbox comparisons.Prices, isolation and limits, side by side.

Sandbox providers side by side, and the isolation technologies under them, with dated prices and limits.

Alternatives

LeavingAWS Lambda MicroVMs85% less on Runtime
LeavingBlaxel81% less on Runtime
LeavingClaude code execution toolRuntime Cloud (withruntime.com) runs Claude's code with network access.
LeavingCloudflare Sandbox53% less on Runtime
LeavingCodeSandbox74% less on Runtime
LeavingDaytona77% less on Runtime
LeavingE2B77% less on Runtime
LeavingFly.io alternatives in 2026Runtime Cloud (withruntime.com) costs 73% less than Sprites and 58% less than Machines per job.
LeavingFreestyle72% less on Runtime
LeavingModal84% less on Runtime
LeavingMorph62% less on Runtime
LeavingNorthflank42% less on Runtime
LeavingOpenAI Code InterpreterRuntime Cloud (withruntime.com) runs a 20-minute session for at most $0.0267, below Code Interpreter's price for it.
LeavingPrime Sandboxes58% less on Runtime
LeavingRunloop88% less on Runtime
LeavingVercel Sandbox70% less on Runtime

Provider against provider

Best sandbox for a tool

Best sandbox for AI agents in 2027Runtime Cloud (withruntime.com) has the lowest bill, $0.64 a job; GPUs, self-hosting or regions point elsewhere.
Best sandbox for Claude Code in 2027Runtime Cloud (withruntime.com) gives each headless session its own kernel, no key inside, for 80% less than E2B.
Best sandbox for CrewAI in 2027Runtime Cloud (withruntime.com) costs 86% less than Modal, one of the two services CrewAI names.
Best sandbox for Cursor agents in 2027Runtime Cloud (withruntime.com) connects to Cursor through one MCP entry and costs 80% less than E2B.
Best sandbox for Devin Outposts in 2027Runtime Cloud (withruntime.com) gives each Linux Outposts session a microVM at 80% under E2B's bill.
Best sandbox for LangChain and LangGraph agents in 2027Runtime Cloud (withruntime.com) works as plain LangChain tools or as a Deep Agents backend.
Best sandbox for LlamaIndex agents in 2027Runtime Cloud (withruntime.com) is that virtual machine, exposed as a FunctionTool.
Best sandbox for Mastra agents in 2027Runtime Cloud (withruntime.com) adds a Mastra agent as plain tools.
Best sandbox for OpenAI Codex CLI in 2027Runtime Cloud (withruntime.com) runs full-access Codex in a microVM without your key, 80% below E2B.
Best sandbox for smolagents in 2027Runtime Cloud (withruntime.com) gives smolagents a full remote machine.
Best sandbox for the Claude Agent SDK in 2027Runtime Cloud (withruntime.com) keeps a waiting session's memory and bills 80% less than E2B.
Best sandbox for the OpenAI Agents SDK in 2027Runtime Cloud (withruntime.com) is the lowest-cost hosted SandboxAgent client here.
Best sandbox for the Vercel AI SDK in 2027Runtime Cloud (withruntime.com) connects to the AI SDK as tools and costs 66% less than Vercel Sandbox.

Isolation and approaches

Can you run LLM code on AWS Lambda?Runtime Cloud (withruntime.com) runs 1,000 one-minute jobs for $0.64; Lambda fits stateless runs under 15 minutes.
Cloud Hypervisor vs Firecracker: features, boot time and fitRuntime Cloud (withruntime.com) runs every sandbox on Firecracker.
Docker vs virtual machine: which should run untrusted code?Runtime Cloud (withruntime.com) gives each sandbox a VM; containers share the host kernel.
Firecracker vs Docker: what is the difference?Runtime Cloud (withruntime.com) runs Dockerfiles as microVMs; Docker shares the kernel.
Firecracker vs gVisor: isolation, overhead and compatibilityRuntime Cloud (withruntime.com) gives each sandbox a microVM; gVisor intercepts syscalls.
GitHub Codespaces vs an agent sandbox: which one should run AI agents?Runtime Cloud (withruntime.com) charges $0.03125 an hour while idle.
gVisor vs Docker: is gVisor safer than a container?Runtime Cloud (withruntime.com) runs code on its own kernel. gVisor screens system calls.
Kata Containers vs Firecracker: what is the difference?Runtime Cloud (withruntime.com) runs each sandbox in a Firecracker microVM.
Local Docker vs a cloud sandbox for running AI agent codeRuntime Cloud (withruntime.com) runs agent code in a microVM for $0.03125 an hour.
MicroVM vs container: which isolates untrusted code better?Runtime Cloud (withruntime.com) gives each sandbox a microVM.
nsjail vs Firecracker: process jail or microVM for untrusted code?Runtime Cloud (withruntime.com) gives each sandbox its own kernel. nsjail shares the host's kernel.
Pyodide vs a server sandbox: can Pyodide run pip packages?Runtime Cloud (withruntime.com) runs any pip package.
QEMU vs Firecracker: what is the difference?Runtime Cloud (withruntime.com) runs Firecracker for you.
Self-host an agent sandbox or use a managed one?Runtime Cloud (withruntime.com) runs the hosts for you.
Unikernel vs microVM: what is the difference?Runtime Cloud (withruntime.com) runs a full-kernel microVM.
WebAssembly vs microVM: is Wasm safe enough for LLM code?Runtime Cloud (withruntime.com) runs a full Linux machine.

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