Alternatives to E2B
E2B and 11 alternative tools evaluated on the Tekai technology radar.
E2B
SubjectManaged cloud platform providing ephemeral Firecracker microVM sandboxes for AI agent code execution with sub-200ms cold starts.
Alternatives
Arrakis
Self-hosted open-source sandbox platform using Cloud Hypervisor microVMs for secure AI agent code execution with native snapshot-and-restore for agent backtracking workflows.
OpenSandbox
A self-hosted sandbox platform by Alibaba for executing untrusted AI agent code, with multi-language SDKs and Docker/Kubernetes runtime support.
Zerobox
A lightweight CLI and TypeScript SDK that sandboxes processes using OS-level isolation with deny-by-default file, network, and credential controls.
Leash by StrongDM
Container-based sandbox that monitors AI agent syscalls via eBPF and enforces access policies written in Cedar.
Kubernetes Agent Sandbox
An official Kubernetes SIG Apps project providing CRD-based sandboxed execution environments for AI agent workloads with pluggable isolation runtimes.
Sprites (Fly.io)
Fly.io's persistent Firecracker microVM product with checkpoint/restore and auto-sleep billing for AI agent workloads.
Daytona
An AI code sandbox platform with sub-90ms creation times, persistent Docker-based environments, and Computer Use support for browser/desktop automation.
Modal
Serverless Python infrastructure platform providing on-demand GPU and CPU compute with sub-second cold starts.
Northflank
Enterprise developer platform offering secure microVM sandboxes for AI agents with BYOC deployment and GPU support.
Microsandbox
A local-first sandbox platform running lightweight microVMs via libkrun with network-layer secret injection so credentials never enter the sandbox.
Zeroboot
A research prototype providing sub-millisecond VM sandboxes for AI agents via copy-on-write forking of Firecracker microVM snapshots.
Comparison Summary
| Tool | Radar | Type | License |
|---|---|---|---|
| E2B | trial | vendor | Apache-2.0 |
| Arrakis | assess | open-source | AGPL-3.0 |
| OpenSandbox | assess | open-source | Apache-2.0 |
| Zerobox | assess | open-source | MIT |
| Leash by StrongDM | assess | open-source | Apache-2.0 |
| Kubernetes Agent Sandbox | assess | open-source | Apache-2.0 |
| Sprites (Fly.io) | assess | vendor | Proprietary |
| Daytona | assess | open-source | Apache-2.0 |
| Modal | assess | vendor | Proprietary |
| Northflank | assess | vendor | Proprietary |
| Microsandbox | assess | open-source | Apache-2.0 |
| Zeroboot | assess | open-source | Apache-2.0 |