Modal Sandboxes
Agent Runtime & Sandboxes · Free + paid
Serverless sandboxed code execution for AI agents
At a glance
- Made by
- Modal
- Korean
- None (English and a few others only)
- API
- Yes
- Available on
- Web, API
What is Modal Sandboxes?
Modal Sandboxes is an isolated execution environment that provides agents with the computers they need at scale. You can launch more than 1 million sandboxes within a minute and define the images and dependencies you want in code. Locking down outbound traffic (egress) keeps environments reproducible and isolated, and filesystem snapshots let you save state and resume later. It is serverless, billed per second for what you use.
- Launch 1 million+ sandboxes in parallel within a minute
- Define execution environments and dependencies in code
- Per-rollout limits on outbound traffic (egress)
- Save filesystem snapshots and resume instantly
- Cold starts under 1 second even with large custom images
- Elastic automatic allocation of CPU and memory
Who uses Modal Sandboxes and for what
- Disposable isolated sandboxes for computing rewards in reinforcement learning rollouts
- Run code generated by coding agents
- Safe execution of AI-generated code
Pricing
What you get for free — Yes (Starter: $30 free credit per month)
| Plan | Price | Main limits |
|---|---|---|
| Sandbox CPU | $0.142 | Per physical core (equivalent to 2 vCPUs) per hour, minimum 0.125 cores per container |
| Sandbox Memory | $0.024 | Per GiB per hour |
| Starter | $0/mo | + compute usage fees, $30 credit per month, 3 seats, 100 containers, 10 concurrent GPUs |
| Team | $250/mo | + compute usage fees, $100 credit per month, unlimited seats, 5000 containers, 50 concurrent GPUs |
| Enterprise | Contact sales | Custom, volume discounts, Okta SSO, HIPAA |
Checked on the official pages on 2026-10-14. Prices and features can change, so check the official site again before paying. · Official pricing page
AI tools similar to Modal Sandboxes (alternatives)
Modal Sandboxes vs. alternatives at a glance
| AI | Pricing | Combos on the map | Connected tools | Free | Cheapest monthly | Korean |
|---|---|---|---|---|---|---|
| Modal Sandboxes | Free + paid | 0 | 2 | Yes | $250/mo | No |
| Daytona | Free | 0 | 2 | Yes | — | No |
| E2B | Free | 0 | 2 | Yes | $150/mo | No |
3 of these 3 tools have a free plan. Cheapest paid plan: E2B ($150/mo).
Combo and connection counts are based on the relationships recorded on AI Galaxy Map (2026-10-26); they are not a quality ranking.
Modal Sandboxes on AI Galaxy Map
- One of 5 AI tools in the Agent Runtime & Sandboxes field.
- Connected to 2 other tools — #1 in its field.
Frequently asked questions
Can I use Modal Sandboxes for free?
Yes (Starter: $30 free credit per month). Prices can change, so check the official site before paying.
What AI can I use instead of Modal Sandboxes?
Tools that do the same job, such as Daytona, E2B, are connected to it on the map.
Can I use Modal Sandboxes in Korean?
None (English and a few others only)
Sources (official pages)
Checked on the official pages on 2026-10-14. Prices and features can change, so check the official site again before paying.