E2B: Building the Cloud Environment for AI Agents
E2B provides secure, isolated cloud environments where AI agents can run code, use tools, and complete complex tasks. Its sandbox infrastructure gives developers a controlled environment for executing AI-generated code and building production-ready agents.
Visit e2b.dev ↗Basic Information
| Company Name | E2B |
| Category | AI Infrastructure / Developer Tools |
| Subcategory | Cloud Sandboxes and AI Agent Execution |
| Founded | 2023 |
| Headquarters | San Francisco, California, United States |
| Founder and CEO | Vasek Mlejnsky |
| Co-founder | Tomas Valenta |
| Latest Reported Funding | $21 million Series A, July 2025 |
| Total Funding | $32 million reported by E2B after its Series A |
| Lead Investor | Insight Partners |
| Other Series A Investors | Decibel, Sunflower Capital, KAYA, and angel investors |
| Valuation | Not publicly confirmed in the company announcement |
| Website | e2b.dev |
What E2B Does
E2B provides cloud-based sandbox environments for AI agents. These isolated environments allow agents to execute generated code, interact with files, and use computing resources without running everything directly on a developer’s or customer’s primary system.
Key Capabilities
- Isolated environments for AI-generated code
- Python and JavaScript code execution
- APIs and SDKs for agent developers
- Sandbox lifecycle and environment management
- Support for desktop and computer-use workflows
- Infrastructure for enterprise agent applications
Why It Matters
AI agents increasingly need to execute code and interact with real tools instead of only generating text. Running that code in isolated environments can reduce the risks associated with uncontrolled execution and make agent applications easier to deploy at scale.
E2B at Scale
E2B reported crossing one billion cumulative sandboxes in June 2026.
Combined SDK downloads reached approximately 60 million by June 2026, according to the company.
E2B said 88% of Fortune 100 companies were signed up on its platform when it announced its Series A in July 2025. This is not the same as 88% being paying customers.
Business Model and Market Opportunity
Cloud Sandbox Infrastructure
E2B supplies the execution environments required by AI applications. Developers can create and manage sandboxes through APIs rather than building their own isolated runtime infrastructure.
Enterprise Adoption
Large organizations can use isolated execution environments for coding agents, document-processing agents, data analysis, and other workflows that require code execution or controlled tool access.
Open-Source Ecosystem
E2B’s SDKs and developer tools help teams integrate sandbox capabilities into their applications. Open-source adoption can support product discovery and create opportunities to sell managed infrastructure to production users.
Funding Journey
Reported pre-seed financing supported the development of E2B’s sandbox technology and developer platform.
E2B continued expanding its developer ecosystem and building infrastructure for AI-generated code execution.
Led by Insight Partners, with participation from Decibel, Sunflower Capital, KAYA, and angel investors. E2B said total funding reached $32 million.
The company reported reaching one billion cumulative sandboxes and approximately 60 million combined SDK downloads.
Competitive Landscape
AI Agent Frameworks
Frameworks help developers define agent behavior, tools, and workflows. E2B addresses a different layer by providing the environment where code can actually run.
Cloud Infrastructure
Traditional cloud platforms offer general-purpose computing. E2B focuses on sandbox environments designed around the temporary, dynamic execution needs of AI agents.
Security and Isolation
Sandboxing helps limit the impact of generated code, but it is not a complete security solution. Production deployments still need access controls, network restrictions, monitoring, and resource limits.