Best AI agents for running code safely (2026)

C

Context Mode

codingOpen source

Context window optimizer for coding agents that sandboxes tool output and persists session memory.

C

Cua

browser/computer useOpen source + cloud

Open-source infrastructure for computer-use agents: sandboxes, drivers across operating systems and benchmarks.

N

NVIDIA OpenShell

MCP & infraOpen source

Sandboxed runtime for autonomous agents with declarative YAML policies on file, network and credential access.

O

OpenSandbox

MCP & infraOpen source

Secure, fast sandbox runtime for AI agents to run code.

C

CubeSandbox

MCP & infraOpen source

Lightweight, concurrent sandbox for running AI agent code securely.

M

microsandbox

MCP & infraOpen source

Local-first microVM runtime for running untrusted agent code safely.

S

Steel

browser/computer useOpen source + cloud

Open-source browser API and sandbox for AI agents to control web browsers at scale.

A

Agent Governance Toolkit

evals & observabilityOpen source

Microsoft toolkit for policy enforcement, identity and sandboxing for AI agents.

N

nono

MCP & infraOpen source

Zero-trust sandboxing for agent runtimes.

J

Judge0

MCP & infraOpen source + cloud

Sandboxed code execution system for running untrusted code from people and AI.

H

HolmesGPT

codingOpen source

CNCF sandbox SRE agent that investigates alerts and incidents.

O

OneCLI

MCP & infraOpen source

Sandboxed agent harness for teams with secure credential handling.

M

Moltis

personal agentsOpen source

Secure personal agent server in Rust with sandboxed execution.

L

Lyzr

frameworksFreemium

Enterprise agent studio and framework for building secure AI agents.

C

CoreWeave Forge

evals & observabilityFreemium

One product to run, observe, evaluate and post-train agents (W&B, OpenPipe, sandboxes).

E

E2B

MCP & infraOpen source + cloud

Secure cloud sandboxes for running agent-generated code.

M

Modal

MCP & infraFreemium

Serverless compute and sandboxes for AI workloads.

D

Deer Flow

researchOpen source

ByteDance's open-source long-horizon agent harness that researches, codes and creates using sandboxes, memory and sub-agents.

A

ArcBox

MCP & infraOpen source

Runs AI agents on isolated machines with their own kernel, filesystem and network.

S

Scalebrowser

browser/computer usePaid

Gives each agent its own isolated browser with a persistent identity for staying signed in.