E2B Sandbox: Enterprise Code Execution for AI Agents | hokai.io
E2B provides secure Firecracker sandboxes for AI agents to execute untrusted code. 150ms cold start, Python/JS SDKs. Free tier, Pro $150/month. 88% Fortune 100 use E2B.
E2B is an enterprise sandbox platform for AI agents to execute untrusted code securely using Firecracker microVMs with 150ms cold start. Supports Python, JavaScript, Ruby, Go, C++. Free tier with $100 credit; Pro $150/month. 88% of Fortune 100 companies use E2B for production AI agent deployments.
Pricing
Hobby (Free): $100 usage credit, 1-hour sessions, 20 concurrent sandboxes. Pro: $150/month base with 24-hour sessions and 100 concurrent sandboxes. Usage-based billing at approximately $0.05/hour per vCPU (only charged when code is running). Enterprise: Custom pricing with $3,000/month minimum for BYOC, on-premises, or advanced features.
Frequently Asked Questions
What is E2B and how does it work?
E2B is a secure cloud sandbox platform that enables AI agents and applications to safely execute untrusted code in isolated microVirtual Machines using Firecracker (AWS's hypervisor). The platform provides kernel-level isolation so malicious code cannot escape to the host or other sandboxes. E2B supports Python, JavaScript/TypeScript, Ruby, Go, C++, and more with fast 150ms cold starts and production-grade SDKs.
How much does E2B cost?
E2B offers a free Hobby tier with $100 usage credit, 1-hour sessions, and 20 concurrent sandboxes (no credit card required). The Pro tier costs $150/month and includes 24-hour sessions, 100 concurrent sandboxes, and custom Docker templates. Usage is billed per second at approximately $0.05/hour per vCPU. Enterprise plans include custom pricing starting at $3,000/month for BYOC, on-premises, or advanced features.
What programming languages does E2B support?
E2B supports multiple programming languages including Python, JavaScript/TypeScript, Ruby, Go, and C++. Sandboxes come with pre-installed package managers (pip, npm, cargo, etc.) and can execute complex code with full dependency support. Developers can also create custom Docker-based templates to pre-configure environments with specific libraries and tools.
Is E2B free to use?
Yes, E2B offers a free Hobby tier that includes $100 in usage credit, 1-hour sandbox sessions, and 20 concurrent sandboxes with no credit card required. The free tier is suitable for development and prototyping. For production use with longer sessions and higher concurrency, the Pro tier starts at $150/month plus per-second usage billing.
What are the best alternatives to E2B?
Top alternatives include Daytona (persistent development environments), Modal (scalable cloud functions with Python support), Northflank (microVM and container sandboxes), Vercel Sandbox (ephemeral microVMs, still in beta), and Beam (serverless GPU-enabled container execution). Choose Daytona for persistent long-running agents. Choose Modal for auto-scaling, cost-efficient execution. Choose Northflank for control and multi-container orchestration.
Who should use E2B?
E2B is ideal for AI agent startups building production coding copilots, data analysis tools, and autonomous systems; enterprise platform teams implementing secure code execution infrastructure; and regulated companies (healthcare, finance) needing SOC 2 and HIPAA-compliant sandboxes. It's less suitable for solo developers, persistent agent workloads exceeding 24 hours, or budget-constrained teams.
Does E2B have an API and integrations?
Yes, E2B provides REST APIs and SDKs in Python and JavaScript for creating and managing sandboxes. October 2025 Docker partnership includes 200+ pre-built integrations via Docker MCP Catalog (GitHub, Perplexity, Browserbase, ElevenLabs, etc.). E2B also integrates with Slack, Discord, and works with AI frameworks like OpenAI and Anthropic Claude via tool-calling interfaces.