E2B vs Letta Cloud
Agent-native side-by-side. Scores are curated estimates on a 0–10 scale. Lock-in: higher = worse. Prefer JTBD picks via /api/decide when choosing for a job.
| Dimension | E2B | Letta Cloud |
|---|---|---|
| Overall | 8.6 | 7.4 |
| Capability fit | 9.4 | 8.0 |
| Price / performance | 8.0 | 7.8 |
| Latency / reliability | 8.6 | 7.2 |
| Developer & agent DX | 9.4 | 8.0 |
| Privacy / data retention | 8.5 | 7.2 |
| Lock-in risk (higher = worse) | 4.0 | 5.5 |
| Maturity / track record | 8.0 | 6.8 |
| Pricing | Firecracker microVM sandboxes billed per second; templates; code interpreter for agents. | As of 2026-09-14: Stateful agent runtime (ex-MemGPT). Free tier BYOK + limited agents; Pro ~$20/mo; API plan ~$20/mo + ~$0.10/active agent/mo + tool-exec ~$0.00015/s (secondary/roundup figures as stored then). As of 2026… |
| Tagline | Depot default code sandbox for agents. Use for untrusted code; Daytona when you need persistent… | Choose when the agent IS a long-lived stateful runtime. For bolt-on memory use Mem0/Zep. |
E2B
Depot default code sandbox for agents. Use for untrusted code; Daytona when you need persistent devworkspaces. Also the depot default Linux desktop sandbox for computer-use (e2b-desktop + VNC stream) when you already standardize on E2B. Strengths: Purpose-built for LLM code execution; Strong isolation (microVMs); Excel
Strengths
- Purpose-built for LLM code execution
- Strong isolation (microVMs)
- Excellent agent SDK fit
Weaknesses
- Per-sandbox-second costs add up
- Less persistent than Daytona workspaces
- Younger than hyperscalers
Letta Cloud
Choose when the agent IS a long-lived stateful runtime. For bolt-on memory use Mem0/Zep. Strengths: Agent-owned memory model; OSS + cloud; Identity/stateful agents.
Strengths
- Agent-owned memory model
- OSS + cloud
- Identity/stateful agents
Weaknesses
- More runtime than pure memory API
- Pricing mixes hosting + usage
- Learning curve
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