Blaxel vs E2B
Answer in brief
Choose Blaxel for always-available agents that sit idle most of the time and need near-instant resume; choose E2B for code interpreters and short-to-medium-lived agent tasks that need microVM isolation, with an open-source self-host path. Blaxel uses MicroVM isolation; E2B uses Firecracker microVM isolation and is open source.
Blaxel vs E2B at a glance
| Attribute | Blaxel | E2B |
|---|---|---|
| What it is | Perpetual microVM sandboxes for AI agents that drop to standby when idle and resume with memory intact, plus volumes, batch jobs and MCP hosting. | Open-source cloud sandboxes for AI agents, each a Firecracker microVM, with pause/resume, snapshots and forking. |
| Isolation | Hardware-isolated microVM per sandbox; root filesystem held in memory; hypervisor not named | Firecracker microVM with its own kernel per sandbox |
| Open source | No (SDKs MIT / Apache-2.0) | Yes (Apache-2.0) |
| Self-host / BYOC | No / Yes | Yes / Yes |
| SDKs | TypeScript, Python, Go | Python, JavaScript/TypeScript |
| Cold start (vendor claim) | Resume from standby in under 25 ms (vendor claim); new sandboxes in under a second | Not documented |
| Max session | Designed to persist indefinitely in standby; workloads from seconds to multiple days | Up to 1 hour continuous (Hobby), 24 hours (Pro) or custom (Enterprise); pausing resets the clock and paused sandboxes are kept until deleted |
| Persistence | Automatic standby after ~5–15 s idle snapshots memory, processes and filesystem; forkable snapshots; volumes and a shared Agent Drive | Pause/resume preserves filesystem and memory; snapshots of running sandboxes, forking from a snapshot, filesystem-only snapshots, auto-resume and volumes (beta) |
| GPU | Not documented | No — sandboxes are CPU-only |
| Networking | Preview URLs with stable names; outbound via proxy, firewall rules or dedicated egress IPs; custom domains | Internet on by default; can be disabled or restricted with allow/deny lists of IPs, CIDRs and domains; public sandbox URLs for exposed ports; custom domains and published egress IPs |
| Pricing | Per second on allocated memory: $0.0000115 per GB-second (~$0.041/GB-hour) while active; standby billed as snapshot storage ($0.20/GB-month) | Per second: $0.000014 per vCPU-second (~$0.050/vCPU-hour) + $0.0000045 per GiB-second (~$0.016/GiB-hour). Pro plan $150/month plus usage; Enterprise from $3,000/month |
| Compliance | SOC 2, ISO 27001, GDPR, CCPA; HIPAA with BAA as a paid add-on | SOC 2 Type II; HIPAA BAA and DPA available on request |
| Best for | Always-available agents that sit idle most of the time and need near-instant resume | Code interpreters and short-to-medium-lived agent tasks that need microVM isolation, with an open-source self-host path |
Verified November 8, 2026 from each provider’s documentation. Cold-start figures are vendor claims, not our measurements.
Which should you choose?
Choose Blaxel if…
- You want a persistent sandbox per user without paying for idle compute
- You need very fast resume from standby
- You want Go as well as Python and TypeScript SDKs
Choose E2B if…
- You want the most widely integrated agent sandbox, with a large ecosystem of examples
- You need Firecracker microVM isolation for untrusted multi-tenant code
- You want an open-source codebase you can self-host or run via BYOC
- You want ready-made code-interpreter and desktop SDKs
Both are worth piloting with your own image and region. See the full Blaxel profile and E2B profile, or the complete comparison.
Frequently asked questions
Is Blaxel or E2B better for AI agents?
Neither is better for every workload. Blaxel is best for always-available agents that sit idle most of the time and need near-instant resume. E2B is best for code interpreters and short-to-medium-lived agent tasks that need microVM isolation, with an open-source self-host path.
Which is open source, Blaxel or E2B?
E2B is open source (Apache-2.0); Blaxel is not.
How do Blaxel and E2B isolate code?
Blaxel: Hardware-isolated microVM per sandbox; root filesystem held in memory; hypervisor not named. E2B: Firecracker microVM with its own kernel per sandbox.
Sources
Cite this page
Agent Sandboxes. (2026). Blaxel vs E2B. agentsandboxes.org. Last reviewed November 8, 2026. https://agentsandboxes.org/compare/blaxel-vs-e2b/
Found an error or a missing sandbox? Submit a correction — every entry links to the sources it relies on.