CodeSandbox
Cloud code editor and sandbox maker, now folding into Together AI's infrastructure.
On the record
Checkpoint: Together AI's stated migration of CodeSandbox features into the Together platform completes
The call
CodeSandbox is being absorbed into Together AI while Google, AWS, Vercel and Cloudflare all now sell the same sandbox layer directly.
CodeSandbox makes isolated computer environments where code can run safely without breaking anything. Google, Amazon, Vercel, and Cloudflare have all built their own versions since 2026, so CodeSandbox's technology is no longer rare or hard to copy. The company collapsed from 27 people to 7 people after the acquisition, which means it is being absorbed into Together AI's product instead of staying independent. What matters now is whether big cloud companies make their own sandbox versions the automatic choice for developers building AI agents, or whether Together AI can convince companies to use its bundled combination of sandbox plus AI computing power.
Why
01
AI pressure: Hyperscaler AI sandboxes (Google Agent Sandbox, AWS AgentCore, Vercel Sandbox). AI agents need code sandboxes, but Google, AWS, Vercel and Cloudflare now ship their own, undercutting CodeSandbox's role as the pick. Could AI do the core job? Only partly.
02
Bigger players: Google, AWS, Vercel, Cloudflare. All four shipped competing sandbox products in 2026 with no technical barrier stopping developers from switching. Could a giant copy it? Yes, easily.
03
What protects it. Together AI's bundled inference plus sandbox pitch, but the CodeSandbox brand itself has no separate protection left.
What would change this call
CodeSandbox brand or SDK gets renamed or fully merged into Together AI's platform within 6 months. Would confirm the standalone product is being dissolved, not preserved.
Dedicated CodeSandbox team headcount rises above 7 or keeps falling by year end 2026. Rising headcount shows reinvestment; falling further shows continued absorption or wind down.
Together AI announces named enterprise sandbox contracts (e.g. Blackbox AI, Superblocks) with disclosed revenue by H2 2026. Would show the bundled sandbox plus inference strategy is winning deals against hyperscaler defaults.
Dedicated CodeSandbox team headcount rises above 7 or keeps falling by year end 2026. Rising headcount shows reinvestment; falling further shows continued absorption or wind down.
Together AI announces named enterprise sandbox contracts (e.g. Blackbox AI, Superblocks) with disclosed revenue by H2 2026. Would show the bundled sandbox plus inference strategy is winning deals against hyperscaler defaults.
Key numbers
- Headcount fell from 27 to 7 employees
- SDK price cut $0.018 to $0.01486 per credit
- Parent Together AI raised $800M at $8.3B
Named risks
- Standalone brand and product being absorbed and dissolved into Together's platform within months.
- Headcount collapse to 7 employees signals team is being wound down, not scaled.
- No structural moat as hyperscalers (Google, AWS, Vercel, Cloudflare) ship comparable sandbox products.
- Pricing cuts (from $0.018 to $0.01486 per credit) indicate margin compression under competitive pressure.
- No GPU passthrough in microVM sandboxes limits competitiveness for some AI workloads.
Rivals, as read in July 2026
| Rival | Direction | Evidence |
|---|---|---|
| Google Agent Sandbox | losing to | Billing goes live July 1, 2026, competing directly with Together Code Sandbox |
| Vercel Sandbox | losing to | Reached general availability January 2026 as a native alternative |
| AWS AgentCore Code Interpreter | contesting | Hyperscaler-native code execution product shipped in 2026 |
| Cloudflare Sandbox SDK | contesting | Shipped as a competing sandbox offering in 2026 |
| E2B, Daytona, Modal | contesting | Well-funded pure-play sandbox competitors named across 2026 comparison research |
Questions people ask
- Is CodeSandbox still an independent company in 2026?
- No. CodeSandbox was acquired by Together AI in December 2024 and by July 2026 its standalone team had shrunk to just 7 employees, down from 27 in 2021, as its product is folded into Together Code Sandbox.
- Who owns CodeSandbox now?
- CodeSandbox is a wholly-owned subsidiary of Together AI, acquired in December 2024. Together AI itself raised an $800M Series C in July 2026 at an $8.3B valuation, making CodeSandbox's fate tied entirely to Together's roadmap.
- Who is CodeSandbox's biggest competitor?
- As of 2026, hyperscalers Google (Agent Sandbox, billing live July 1, 2026), AWS (AgentCore Code Interpreter), Vercel (Sandbox, GA January 2026), and Cloudflare (Sandbox SDK) all ship competing AI-agent code execution sandboxes, alongside pure-plays E2B, Daytona, and Modal.
- Could AI replace CodeSandbox?
- Not directly, but its original browser-IDE business is already commoditized by AI coding assistants like Cursor and Replit Agent. Its current product, VM sandbox infrastructure for AI agents, is a component consumed by AI systems and faces heavy hyperscaler competition, not model replacement.
- Is CodeSandbox profitable?
- Standalone financials are not disclosed by parent Together AI. A third-party estimate (Growjo) put CodeSandbox revenue near $1.2M pre-acquisition; post-2024 the unit operates as absorbed infrastructure billing, not a disclosed independent P&L.
- Will the CodeSandbox brand survive?
- Uncertain. As of June 29, 2026, Together AI's documentation states CodeSandbox features are being migrated to the Together platform over coming months, and the entity has already been rebranded in parts as Together Code Sandbox.
Timeline
- 2026-07-08CodeSandbox headcount reported at 7 employees, down 30% YoY (Crustdata)
- 2026-07-01Together AI raises $800M Series C at $8.3B valuation, bookings cross $1.15B
- 2026-06-29Together docs confirm CodeSandbox SDK pricing cut to $0.01486/credit
- 2026-06-10Google Agent Sandbox billing set to start July 1, 2026, per competitive research
- 2026-01Vercel Sandbox reaches general availability, competing directly with CodeSandbox SDK
- 2025-05-19CodeSandbox SDK reaches general availability under Together AI
- 2024-12-12Together AI acquires CodeSandbox, citing 4.5 million monthly developers
- 2024-12-11CodeSandbox SDK launched in beta at $0.018 per credit
- 2021-09CodeSandbox headcount recorded at 27 employees (pre-acquisition peak)
Revision history
21 July 2026
First assessed. Losing its protection. The text above is fixed as of this date and is not edited afterwards.
In the same band
Sources
- Together AI Acquires CodeSandbox to Launch First-of-its-Kind Code Interpreter for Generative AI (2024-12-12)
- CodeSandbox - Headcount, Funding & Open Jobs (2026-07-08)
- Neocloud Together AI raises $800M, leaps to $8.3B valuation (2026-07-01)
- Together AI Raises $800 Million at $8.3 Billion Valuation to Make Frontier AI Accessible to All (2026-07-01)
- Together AI acquires CodeSandbox, adds code interpreter to its AI development platform (2024-12-12)
- Joining Together AI and Introducing CodeSandbox SDK (2024-12-11)
- Together AI docs (2026-06-29)
- AI Agent Sandboxes Compared (2026-06-10)
- Together AI acquires CodeSandbox to launch first-of-its-kind code interpreter for generative AI (2026-02-24)
- Together Code Sandbox: the most robust infrastructure for building AI coding products at scale (2026-02-24)
- Best Code Execution Environments for AI Agents in 2026 (2026-06-03)
- Amsterdam-based CodeSandbox aims to make coding more collaborative & less complex; raises €10.83M (2024-03-24)