Best Fly.io Sprites alternatives
The strongest Fly.io Sprites alternatives are Daytona, E2B, Vercel Sandbox. Pick based on what you need that Fly.io Sprites does not offer — see the reasons under each entry.
Why teams look beyond Fly.io Sprites
The most natural “persistent computer per agent” model, with idle-free billing.
- No GPUs
- Fixed 8 vCPU / 100 GB shape; memory platform-managed
- Hosted only — no self-hosting or BYOC
Fly.io Sprites alternatives, ranked
Daytona
Stateful sandboxes for AI-generated code — Linux containers, Linux and Windows VMs, macOS and GPU sandboxes — with snapshots, volumes and preview URLs.
- Containers or VMs
- BYOC
- GPU
- Pause/resume
Why it’s here: Long-lived, stateful agent workspaces that need many SDK languages, GPUs, or Windows and macOS sandboxes. The strongest choice for stateful coding-agent workspaces and breadth of sandbox types; note the shift away from open source.
E2B
Open-source cloud sandboxes for AI agents, each a Firecracker microVM, with pause/resume, snapshots and forking.
- Firecracker microVM
- Open source
- Self-hostable
- BYOC
- Pause/resume
Why it’s here: Code interpreters and short-to-medium-lived agent tasks that need microVM isolation, with an open-source self-host path. The safe default for most agent builders: mature, open source, microVM-isolated and widely supported.
Vercel Sandbox
Firecracker microVM sandboxes on Vercel’s infrastructure, persistent by default and billed on active CPU, with fine-grained egress control.
- Firecracker microVM
- Pause/resume
Why it’s here: Teams on Vercel and agent builders who want microVM isolation, active-CPU billing and credential brokering. A polished microVM sandbox with standout egress and billing design; the obvious pick for Vercel-centric teams.
Morph Cloud
VM-based cloud computers for AI agents built on “Infinibranch” snapshot, branch and restore, plus persistent Devboxes.
- VM
- Pause/resume
Why it’s here: Workloads that branch a running environment many times — parallel search, RL and evaluation rollouts. Purpose-built for branching workloads; a specialist pick for search, RL and evals.
Together Code Sandbox
Together AI’s microVM sandbox service, built on the CodeSandbox acquisition, with snapshot-based starts, hibernation, cloning and preview URLs.
- MicroVM
- Pause/resume
Why it’s here: AI app builders and coding products that need hibernatable, forkable dev-environment VMs with preview URLs. Battle-tested microVM dev environments, now best suited to teams already working with Together AI.
Fly.io Sprites vs alternatives
| Sandbox | Isolation | Open source | Self-host / BYOC | Cold start (vendor) | Max session | Snapshots / pause | GPU | SDKs |
|---|---|---|---|---|---|---|---|---|
| Fly.io Sprites | MicroVM | No | No / No | 0.1–2 s wake | Unlimited | Yes / Yes | No | JavaScript/TypeScript, Go, Python, Elixir |
| Daytona | Containers or VMs | No | Not documented / Yes | <90 ms | Unlimited | Yes / Yes | Yes | Python, TypeScript, Ruby, Go, Java |
| E2B | Firecracker microVM | Yes | Yes / Yes | Not documented | 1 h / 24 h (Pro) | Yes / Yes | No | Python, JavaScript/TypeScript |
| Vercel Sandbox | Firecracker microVM | No | No / No | Milliseconds (claim) | 24 h (Pro) | Yes / Yes | Not documented | JavaScript/TypeScript, Python |
| Morph Cloud | VM | No | No / Not documented | <250 ms (restore) | Configurable | Yes / Yes | Not documented | Python, TypeScript |
| Together Code Sandbox | MicroVM | No | No / Not documented | 0.5 s (snapshot) | Until terminated | Yes / Yes | Not documented | Python, TypeScript |
Frequently asked questions
What is the best alternative to Fly.io Sprites?
Is there an open-source alternative to Fly.io Sprites?
Cite this page
Agent Sandboxes. (2026). Best Fly.io Sprites alternatives. agentsandboxes.org. Last reviewed November 8, 2026. https://agentsandboxes.org/alternatives/fly-sprites/
Found an error or a missing sandbox? Submit a correction — every entry links to the sources it relies on.