Cloud Sandboxes for
AI Agents - Early Access

Isolated cloud sandboxes for agent code, data pipelines, and workloads - fast, secure, and built for real agent systems.

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Zeist Sandbox

// provision isolated runtime

Built for teams building agentic systems

See It In Action

Watch your code execute in real-time isolated environments

console

sandbox.zeist.dev

Waiting for sandbox...

🐍

Python 3.12

Data science, ML pipelines, and automation scripts. Batteries included with numpy, pandas, and requests.

⬢

Node.js 22

Modern JavaScript runtime. Ship APIs, scrapers, and serverless functions with full npm ecosystem.

Go 1.22

Blazing fast compiled binaries. Build high-throughput agents and performant CLI tools.

Isolated execution environments. Pick your stack, we handle the infrastructure.

Developer Experience

Full control over your sandboxes. Simple APIs, powerful capabilities.

1from zeist import Zeist
2
3# Initialize the client
4client = Zeist()
5
6# Create an isolated sandbox
7sandbox = client.sandbox.create(
8    runtime="python",
9    memory="512mb"
10)
11
12print(f"Sandbox ready: {sandbox.id}")
13
14# Execute code securely
15result = sandbox.exec('''
16import math
17print(f"Pi is {math.pi:.4f}")
18''')
19
20# Check the output
21if result.ok:
22    print(result.stdout)
23    # Output: Pi is 3.1416
24else:
25    print(f"Failed: {result.stderr}")
26
27# Clean up
28sandbox.terminate()

Runtime features that matter

Secure Execution: Isolated environments for untrusted agent-generated code.
Sub-200ms Startup200ms: Low latency agents require fast provisioned runtimes.
Persistent Sandboxes: Sessions last as long as your workflows.
Multi-Language Support: Python, Node, Go, Bash (expandable).

Built for Agentic Workloads

LLM Code Execution

Run AI-generated code safely in isolated environments

Data Processing & Pipelines

Process datasets with full Python/Node environments

CI/CD & Build Systems

Run builds and tests in fresh sandboxes

Cloud IDEs & Playgrounds

Instant development environments for your team

Multi-Tenant Execution

Isolated execution per customer or request

Background Agent Tasks

Long-running agent processes with persistence

Platform Features

Persistent Sessions (24h+)

Streaming STDOUT / STDERR

File System Isolation

Ephemeral or Persistent Storage

Networking Controls

preview.zeist.dev

Preview URLs

Start Building Agents
With Real Runtime Environments

Be first to run agent workloads in secure sandboxes and shape the platform roadmap.