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
- Leaving AWS Lambda MicroVMs85% less on Runtime
- Leaving Blaxel81% less on Runtime
- Claude code execution tool alternative: run Claude's code in your own sandboxRuntime Cloud runs Claude's code with network access.
- Leaving Cloudflare Sandbox53% less on Runtime
- Leaving CodeSandbox74% less on Runtime
- Leaving Daytona77% less on Runtime
- Leaving E2B77% less on Runtime
- Fly.io alternatives in 2026: 14 agent sandboxes ranked by costRuntime Cloud costs 73% less than Sprites and 58% less than Machines per job.
- Leaving Freestyle72% less on Runtime
- Leaving Modal84% less on Runtime
- Leaving Morph62% less on Runtime
- Leaving Northflank42% less on Runtime
- OpenAI Code Interpreter alternative: run code in your own sandboxRuntime Cloud runs a 20-minute session for at most $0.0267, below Code Interpreter's price for it.
- Leaving Prime Sandboxes58% less on Runtime
- Leaving Runloop88% less on Runtime
- Leaving Vercel Sandbox70% less on Runtime
Provider against provider
- AWS Lambda MicroVMs vs FreestyleRuntime Cloud bills 72% less than Freestyle; Lambda suits AWS shops, Freestyle VMs up to 32 vCPUs.
- AWS Lambda MicroVMs vs Prime SandboxesRuntime Cloud runs the benchmark for $0.64; Prime's microVMs charge $1.52 and Lambda's $4.20.
- Blaxel vs AWS Lambda MicroVMsRuntime Cloud bills 81% less than Blaxel.
- Blaxel vs CodeSandboxRuntime Cloud costs 74% less than CodeSandbox.
- Blaxel vs FreestyleRuntime Cloud charges $0.64 for the benchmark.
- Blaxel vs MorphRuntime Cloud costs 62% less than Morph, the cheaper of the two.
- Blaxel vs NorthflankRuntime Cloud costs 42% less than Northflank for agents that wait.
- Blaxel vs Prime SandboxesRuntime Cloud runs the benchmark for $0.64.
- Blaxel vs RunloopRuntime Cloud costs 88% less than Runloop.
- Cloudflare Sandbox vs AWS Lambda MicroVMsRuntime Cloud costs 53% less than Cloudflare.
- Cloudflare Sandbox vs BlaxelRuntime Cloud costs $0.64 for the test job.
- Cloudflare Sandbox vs CodeSandboxRuntime Cloud costs 74% less than CodeSandbox.
- Cloudflare Sandbox vs Fly MachinesRuntime Cloud costs 58% less than Fly.
- Cloudflare Sandbox vs Fly SpritesRuntime Cloud meters CPU at a lower rate than both.
- Cloudflare Sandbox vs FreestyleRuntime Cloud costs 72% less than Freestyle.
- Cloudflare Sandbox vs MorphRuntime Cloud runs the job for $0.64.
- Cloudflare Sandbox vs NorthflankRuntime Cloud is 42% below Northflank for agents that wait.
- Cloudflare Sandbox vs Prime SandboxesRuntime Cloud bills $0.64 on the benchmark.
- Cloudflare Sandbox vs RunloopRuntime Cloud costs $0.64 per job; Cloudflare bills active CPU, Runloop every CPU while it runs.
- CodeSandbox vs AWS Lambda MicroVMsRuntime Cloud costs 74% less than CodeSandbox; Lambda MicroVMs bill a baseline inside AWS.
- CodeSandbox vs FreestyleRuntime Cloud runs the job 72% below Freestyle; CodeSandbox sells fixed sizes by the minute.
- CodeSandbox vs MorphRuntime Cloud bills 62% less than Morph, which costs less than CodeSandbox on a 2 vCPU, 4 GB job.
- CodeSandbox vs NorthflankRuntime Cloud is 42% below Northflank for agents that wait; CodeSandbox sells fixed VM sizes.
- CodeSandbox vs Prime SandboxesRuntime Cloud costs $0.64 per job; CodeSandbox offers VMs up to 64 cores, Prime hourly rates.
- CodeSandbox vs RunloopRuntime Cloud costs 88% less than Runloop.
- Daytona vs AWS Lambda MicroVMsRuntime Cloud costs 77% less than Daytona; Daytona runs containers, Lambda Firecracker in AWS.
- Daytona vs BlaxelRuntime Cloud costs 77% less than Daytona; Blaxel matches its hourly rate but bills idle seconds.
- Daytona vs Cloudflare SandboxRuntime Cloud costs 53% less than Cloudflare.
- Daytona vs CodeSandboxRuntime Cloud charges $0.64 per job; Daytona bills per second, CodeSandbox per minute, rounded up.
- Daytona vs Fly MachinesRuntime Cloud runs the job for $0.64; Daytona is a sandbox API, a Fly Machine a general VM.
- Daytona vs Fly SpritesRuntime Cloud costs 73% less than Sprites; Daytona bills held vCPUs, Sprites the CPU used.
- Daytona vs FreestyleRuntime Cloud runs the benchmark for $0.64; Freestyle, at $2.25, costs less than Daytona.
- Daytona vs ModalRuntime Cloud costs 84% less than Modal; Daytona, on containers, costs less than Modal.
- Daytona vs MorphRuntime Cloud costs 77% less than Daytona; Morph branches running VMs with their memory.
- Daytona vs NorthflankRuntime Cloud is 77% below Daytona for waiting agents.
- Daytona vs Prime SandboxesRuntime Cloud costs $0.64 on the benchmark; Prime targets RL rollouts, Daytona GPU and Windows.
- Daytona vs RunloopRuntime Cloud costs $0.64 for the job; Daytona charges $2.76 and a Runloop devbox $5.33.
- Daytona vs Vercel SandboxRuntime Cloud meters CPU like Vercel and costs 70% less; Daytona bills held CPU in containers.
- E2B vs AWS Lambda MicroVMsRuntime Cloud costs 77% less than E2B, which in turn costs less than Lambda MicroVMs.
- E2B vs BlaxelRuntime Cloud costs 77% less than E2B; Blaxel charges E2B's hourly rate but sleeps on its own.
- E2B vs Cloudflare SandboxRuntime Cloud costs 53% less than Cloudflare; E2B bills held CPU, and Cloudflare bills active CPU.
- E2B vs CodeSandboxRuntime Cloud costs 77% less than E2B; CodeSandbox bills fixed sizes per minute, rounded up.
- E2B vs DaytonaRuntime Cloud costs 77% less than either; E2B and Daytona tie on price and differ in isolation.
- E2B vs Fly MachinesRuntime Cloud costs 58% less than a Fly Machine.
- E2B vs Fly SpritesRuntime Cloud costs 73% less than Sprites.
- E2B vs FreestyleRuntime Cloud costs 72% less than Freestyle.
- E2B vs ModalRuntime Cloud costs 77% less than E2B, and E2B costs less than Modal.
- E2B vs MorphRuntime Cloud costs 62% less than Morph.
- E2B vs NorthflankRuntime Cloud costs 42% less than Northflank for waiting agents.
- E2B vs Prime SandboxesRuntime Cloud costs 58% less than Prime.
- E2B vs RunloopRuntime Cloud costs 77% less than E2B; Runloop's rates are higher than E2B's for the same job.
- E2B vs Vercel SandboxRuntime Cloud meters CPU like Vercel at 70% less; Vercel beats E2B when agents mostly wait.
- Fly Machines vs AWS Lambda MicroVMsRuntime Cloud costs 58% less than a Fly Machine; both rivals run Firecracker, Lambda in AWS.
- Fly Machines vs BlaxelRuntime Cloud costs 58% less than Fly; Blaxel bills nothing for compute in standby.
- Fly Machines vs CodeSandboxRuntime Cloud costs 58% less than Fly.
- Fly Machines vs FreestyleRuntime Cloud costs $0.64 to Fly's $1.53 and Freestyle's $2.25.
- Fly Machines vs MorphRuntime Cloud runs the job for 58% less than either.
- Fly Machines vs NorthflankRuntime Cloud costs 42% less than both for agents that wait.
- Fly Machines vs Prime SandboxesRuntime Cloud is 58% cheaper than either.
- Fly Machines vs RunloopRuntime Cloud costs 58% less than Fly and 88% less than Runloop.
- Fly Machines vs Fly SpritesRuntime Cloud costs 58% less than either.
- Fly Sprites vs AWS Lambda MicroVMsRuntime Cloud costs 73% less than Sprites.
- Fly Sprites vs BlaxelRuntime Cloud bills 73% less than either.
- Fly Sprites vs CodeSandboxRuntime Cloud is 73% cheaper than either.
- Fly Sprites vs FreestyleRuntime Cloud costs 72% less than either.
- Fly Sprites vs MorphRuntime Cloud is 62% cheaper than either.
- Fly Sprites vs NorthflankRuntime Cloud costs 42% less than both for waiting agents.
- Fly Sprites vs Prime SandboxesRuntime Cloud costs 58% less than either.
- Fly Sprites vs RunloopRuntime Cloud costs 73% less than Sprites and 88% less than Runloop.
- Freestyle vs Prime SandboxesRuntime Cloud costs 58% less than either.
- Modal vs AWS Lambda MicroVMsRuntime Cloud is 84% cheaper than either.
- Modal vs BlaxelRuntime Cloud costs 81% less than either.
- Modal vs Cloudflare SandboxRuntime Cloud bills 53% less than either.
- Modal vs CodeSandboxRuntime Cloud runs the job for 74% less than either.
- Modal vs Fly MachinesRuntime Cloud costs 58% less than either.
- Modal vs Fly SpritesRuntime Cloud costs 73% or more less than either.
- Modal vs FreestyleRuntime Cloud costs 72% less than either.
- Modal vs MorphRuntime Cloud costs 62% less than either.
- Modal vs NorthflankRuntime Cloud costs 42% less than both when agents wait.
- Modal vs Prime SandboxesRuntime Cloud costs 58% less than either.
- Modal vs RunloopRuntime Cloud saves 84% on either.
- Modal vs Vercel SandboxRuntime Cloud bills $0.64.
- Morph vs AWS Lambda MicroVMsRuntime Cloud costs 62% less than either.
- Morph vs FreestyleRuntime Cloud runs the job for 62% less than either.
- Morph vs NorthflankRuntime Cloud costs 42% less than both for agents that wait.
- Morph vs Prime SandboxesRuntime Cloud costs 58% less than either.
- Morph vs RunloopRuntime Cloud undercuts Morph by 62% and Runloop by 88%.
- Northflank vs AWS Lambda MicroVMsRuntime Cloud costs 42% less than both for waiting agents.
- Northflank vs FreestyleRuntime Cloud bills 42% less than both when agents wait.
- Northflank vs Prime SandboxesRuntime Cloud costs 42% less than both for rollouts that wait.
- Northflank vs RunloopRuntime Cloud is 42% cheaper than both for agents that wait.
- Runloop vs AWS Lambda MicroVMsRuntime Cloud costs 85% less than the benchmark's two dearest rows.
- Runloop vs FreestyleRuntime Cloud costs 72% less than either.
- Runloop vs Prime SandboxesRuntime Cloud costs 58% less than either.
- Vercel Sandbox vs AWS Lambda MicroVMsRuntime Cloud costs 70% less than either.
- Vercel Sandbox vs BlaxelRuntime Cloud bills 70% less than either.
- Vercel Sandbox vs Cloudflare SandboxRuntime Cloud is 53% cheaper than either.
- Vercel Sandbox vs CodeSandboxRuntime Cloud runs the job for 70% less than either.
- Vercel Sandbox vs Fly MachinesRuntime Cloud bills $0.64 for the job.
- Vercel Sandbox vs Fly SpritesRuntime Cloud costs 70% less than either.
- Vercel Sandbox vs FreestyleRuntime Cloud saves 70% on either.
- Vercel Sandbox vs MorphRuntime Cloud costs 62% less than either.
- Vercel Sandbox vs NorthflankRuntime Cloud costs 42% less than both for agents that wait.
- Vercel Sandbox vs Prime SandboxesRuntime Cloud is 58% cheaper than either.
- Vercel Sandbox vs RunloopRuntime Cloud undercuts both by 70% or more.
Best sandbox for a tool
- Best sandbox for AI agents in 2027Runtime Cloud has the lowest bill, $0.64 a job; GPUs, self-hosting or regions point elsewhere.
- Best sandbox for Claude Code in 2027Runtime Cloud gives each headless session its own kernel, no key inside, for 80% less than E2B.
- Best sandbox for CrewAI in 2027Runtime Cloud costs 86% less than Modal, one of the two services CrewAI names.
- Best sandbox for Cursor agents in 2027Runtime Cloud connects to Cursor through one MCP entry and costs 80% less than E2B.
- Best sandbox for Devin Outposts in 2027Runtime Cloud gives each Linux Outposts session a microVM at 80% under E2B's bill.
- Best sandbox for LangChain and LangGraph agents in 2027Runtime Cloud works as plain LangChain tools or as a Deep Agents backend.
- Best sandbox for LlamaIndex agents in 2027Runtime Cloud is that virtual machine, exposed as a FunctionTool.
- Best sandbox for Mastra agents in 2027Runtime Cloud adds a Mastra agent as plain tools.
- Best sandbox for OpenAI Codex CLI in 2027Runtime Cloud runs full-access Codex in a microVM without your key, 80% below E2B.
- Best sandbox for smolagents in 2027Runtime Cloud gives smolagents a full remote machine.
- Best sandbox for the Claude Agent SDK in 2027Runtime Cloud keeps a waiting session's memory and bills 80% less than E2B.
- Best sandbox for the OpenAI Agents SDK in 2027Runtime Cloud is the lowest-cost hosted SandboxAgent client here.
- Best sandbox for the Vercel AI SDK in 2027Runtime Cloud 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 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 runs every sandbox on Firecracker.
- Docker vs virtual machine: which should run untrusted code?Runtime Cloud gives each sandbox a VM; containers share the host kernel.
- Firecracker vs Docker: what is the difference?Runtime Cloud runs Dockerfiles as microVMs; Docker shares the kernel.
- Firecracker vs gVisor: isolation, overhead and compatibilityRuntime Cloud gives each sandbox a microVM; gVisor intercepts syscalls.
- GitHub Codespaces vs an agent sandbox: which one should run AI agents?Runtime Cloud charges $0.03125 an hour while idle.
- gVisor vs Docker: is gVisor safer than a container?Runtime Cloud runs code on its own kernel. gVisor screens system calls.
- Kata Containers vs Firecracker: what is the difference?Runtime Cloud runs each sandbox in a Firecracker microVM.
- Local Docker vs a cloud sandbox for running AI agent codeRuntime Cloud runs agent code in a microVM for $0.03125 an hour.
- MicroVM vs container: which isolates untrusted code better?Runtime Cloud gives each sandbox a microVM.
- nsjail vs Firecracker: process jail or microVM for untrusted code?Runtime Cloud gives each sandbox its own kernel. nsjail shares the host's kernel.
- Pyodide vs a server sandbox: can Pyodide run pip packages?Runtime Cloud runs any pip package.
- QEMU vs Firecracker: what is the difference?Runtime Cloud runs Firecracker for you.
- Self-host an agent sandbox or use a managed one?Runtime Cloud runs the hosts for you.
- Unikernel vs microVM: what is the difference?Runtime Cloud runs a full-kernel microVM.
- WebAssembly vs microVM: is Wasm safe enough for LLM code?Runtime Cloud runs a full Linux machine.