Modal Sandboxes
https://modal.com/docs/guide/sandbox
Modal Labs ships a serverless container platform with first-class GPU support; Sandboxes feature (2024) adds ephemeral, AI-agent-friendly compute sandboxes. Founded 2021 by Erik Bernhardsson (ex-Spotify ML, author of Luigi + Annoy). $87M total raised through Series B (Lux Capital + Redpoint + Definition + Amplify). Used by major LLM apps for batch inference + agent code execution.
At a glance
- Type
- Serverless container runtime + AI-agent sandboxes (Modal Labs)
- Tier
- T1
- Created
- 2021 (Modal founded); 2024 (Sandboxes feature)
- Latest release
- not applicable — sandbox/runtime, not memory product
- License
- not applicable — not OSS
- GitHub
- not applicable — no GitHub repo
- Pricing
- Pay-per-second compute (CPU + GPU); free tier (~$30/mo credit); team + enterprise tiers
- Funding
- $87M total raised; Series B Sept-2024 led by Lux Capital + Redpoint; ~$1.1B valuation
Taxonomy
- storage
- none-trivial
- retrieval
- none
- persistence
- ephemeral
- update
- read-only
- unit
- file
- governance
- opaque
- conflict
- out-of-scope
When to use
Optimised for: serverless GPU + general-purpose agent sandboxes; batch inference + AI app backends
Anti-fit: not applicable — sandbox/runtime, not memory product
Pros & cons
Pros
Best-in-class serverless GPU support (A100 / H100 on-demand); Sandboxes are general-purpose (not just code-exec); large LLM-app customers (Suno, Ramp, Anthropic workloads); $1.1B valuation; Erik Bernhardsson founder pedigree.
Cons
Managed-only (no self-host); GPU pricing premium; sandbox feature newer than e2b; Python-only SDK.
Claims & capabilities
$87M total raised (Series B Sept-2024 led by Lux Capital + Redpoint; $1.1B reported valuation); founded 2021 by Erik Bernhardsson (ex-Spotify ML); Sandboxes feature 2024; serverless GPU + container runtime
Technical surface
- API surface
- Python SDK (primary); REST API
- Backend storage
- not applicable — sandbox/runtime, not memory product
- Deployment
- Managed cloud (no self-hosting)
- Embedding model
- not applicable — not a memory product
- Multi-tenancy
- not applicable — sandbox/runtime, not memory product
- MCP
- not applicable — sandbox/runtime, not memory product
- A2A
- not applicable — sandbox/runtime, not memory product
- OpenTelemetry
- not applicable — sandbox/runtime, not memory product
Compare Modal Sandboxes with…
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