[ IN PRIVATE BETA ]

Adopt internal background
agents for your team.

We manage the sandboxing infrastructure. You choose the agents, harnesses, and workflows.

Schedule a call with us
AGENTSVALLOSANDBOXESagent/pr-review$ vallo run --repo acmeagent/fix-auth$ vallo run --repo coreagent/add-tests$ vallo run --repo apiWARM POOLready4warming2avg spin-up3.2sactive6uptime99.9%sbx-a4f2activepostgres · redis:3000sbx-b7e1activemysql · minio:8080sbx-c3d9warmingpostgres · redis:4200

Trusted by engineers from

[ Product ]

Your infrastructure, your rules.

Every session runs in an isolated Linux container with real databases, live previews, and SSH access. Everything is configurable; nothing is hidden.

01

Sandbox

Full Linux environments

Node.js, Python, Git, Playwright, and a Caddy reverse proxy. Postgres, Redis, MySQL, and MinIO started on demand. SSH in anytime via Cloudflare Zero Trust.

session · a3f9
$ ssh [email protected]Connected via Cloudflare Zero Trust $ vallo services postgres 5432 running redis 6379 running minio 9000 running caddy 443 running
02

Interfaces

Web, CLI, and Slack

Start sessions from wherever you work. All three interfaces share the same real-time state via WebSocket sync. Follow-up messages in a Slack thread go to the same session.

terminal
$ vallo run \ --repo acme/api \ --pr "fix the auth bug" Session c7e2 createdRestoring snapshot... done (3.1s)Agent working on: fix the auth bug
03

Models

Any model you want

13+ models across three providers. Switch per session, per prompt, or set an org default. Your API keys are encrypted with AES-256-GCM and injected via auth proxy. The agent never sees the real key.

AnthropicSonnet 4.6 · Opus 4.6 · Opus 4.5 · Haiku 4.5
OpenAIGPT-5.4 · 5.3 Codex · 5.2 Codex · 5.2
OpenCodeKimi K2.5 · GLM 5 · MiniMax M2.5
04

Preview

Live preview URLs

Every dev server gets a stable, subdomain-isolated URL. OAuth flows, CORS, and service workers work naturally. Share via HMAC-signed token so anyone with the link can view the running app.

https://c7e2.preview.vallo.dev
Your running app renders here
05

Performance

3–5 second warm starts

After the first build, Vallo snapshots the sandbox filesystem. Every subsequent session restores from snapshot in seconds. No clone, no install, no build.

Cold start
~60s
git clone + install + build
Warm start
~3s
snapshot restore
06

Output

One-click pull requests

Create a PR from the web app, CLI, or Slack. Vallo pushes to a branch, opens the PR via your GitHub App, and posts a live preview comment automatically.

fix: resolve auth token refresh
vallo/session-c7e2 → main+47 −123 files
[ PRICING ]

Request beta access

Join the individual queue for self-serve access, or talk to us about rolling Vallo out across your team.

Individual

Individual beta access with starter credits.

Join Waitlist

Includes:

  • Run agents in secure cloud sandboxes
  • Persistent sessions + live previews
  • Auto-run builds and test execution
  • Fast startup with proactive warming
  • Parallel agent sessions
  • Community support

Enterprise

For teams building internal background agents.

Book A Call

Everything in Individual, Plus:

  • Team workspaces + shared sessions
  • Dedicated app and volume
  • Advanced permissions & role controls
  • Custom execution environments
  • CI/CD & monitoring integrations
  • Deployment guardrails + rollback hooks
  • Dedicated compute tiers + pre-warmed pools
  • SLA + dedicated support