e2b vs lowdefy
Two of the top projects in App builder starters, side by side: who leads on each score part and who each one suits, then setup, license, activity and what each review found.
e2b
SDKs for running AI-generated code in isolated cloud sandboxes
lowdefy
YAML-config framework for building internal web apps and admin tools
Verdict
e2b ranks higher, 83 to 73. Of the 4 score parts we measure for both, e2b leads on 2, lowdefy on 1 and 1 is even.
- Adoptione2b leads by 46 points, 74 to 28: a wide gap.
- FreshnessEven at 100.
- Maintenancelowdefy leads by 18 points, 98 to 80: a wide gap.
- Agent-readye2b leads by 15 points, 70 to 55: a wide gap.
Pick e2b if you are
Developers who need sandboxed code execution for agents or app builders
- Official JavaScript/TypeScript and Python SDKs with a matching sandbox API
- Separate Code Interpreter and Desktop SDKs cover code execution and computer use
Pick lowdefy if you are
Teams building internal tools and CRUD apps, with or without AI-generated config
- Schema-validated config is interpreted, not executed, so there are no arbitrary code paths
- Ships 70+ UI blocks and 10+ data connectors including MongoDB, PostgreSQL and Stripe
| What we compare | e2b | lowdefy |
|---|---|---|
| Score parts, out of 100 | ||
| Adoption | 74, popular | 28, niche |
| Freshness | 100, active | 100, active |
| Maintenance | 80, healthy | 98, healthy |
| Agent-ready | 70, partly | 55, partly |
| Facts from GitHub and the README | ||
| Stars | 14.8k | 3k |
| License | Apache-2.0 (permissive) | Apache-2.0 (permissive) |
| Last commit | Nov 2026 | Nov 2026 |
| Last release | Nov 2026 | Nov 2026 |
| Language | Python | JavaScript |
| Docker | Yes | No |
| GPU | Not stated | Not needed |
| arm64 or Apple Silicon | Not stated | Not stated |
e2b
E2B provides JavaScript and Python SDKs that start isolated cloud sandboxes and run shell commands inside them. Companion packages add a Code Interpreter (runCode/run_code) and a Desktop SDK for mouse, keyboard and screenshot control. The runtime can be self-hosted with Terraform on AWS, GCP, Azure or a generic Linux machine; the hosted service needs an API key.
Who it is for: Developers who need sandboxed code execution for agents or app builders
Strengths
- Official JavaScript/TypeScript and Python SDKs with a matching sandbox API
- Separate Code Interpreter and Desktop SDKs cover code execution and computer use
- Self-hosting supported on AWS, GCP, Azure and generic Linux via Terraform
- Apache-2.0 license; cookbook repo has examples for several LLMs and frameworks
Weaknesses
- Hosted use requires an E2B account and API key
- Self-hosted runtime lives in a separate repo, e2b-dev/runtime
- README gives no resource requirements, pricing or sandbox limits
- Provides sandboxes only; agent logic and LLM integration are left to you
- Python
- Needs E2B API key (hosted), Terraform (self-hosting)
- Docker
lowdefy
Lowdefy builds web apps from YAML config instead of hand-written React. Pages are composed from 70+ UI blocks and 50+ logic operators, with connectors for MongoDB, PostgreSQL, MySQL, REST, Google Sheets, S3, Elasticsearch and Stripe. The runtime is built on Hono, Vite and Auth.js and extends through npm plugins. The README pitches the config as a reviewable target for AI-generated apps.
Who it is for: Teams building internal tools and CRUD apps, with or without AI-generated config
Strengths
- Schema-validated config is interpreted, not executed, so there are no arbitrary code paths
- Ships 70+ UI blocks and 10+ data connectors including MongoDB, PostgreSQL and Stripe
- Auth.js integration with 75+ auth providers, role-based access control and private pages
- Plugin system for blocks, connections, operators, actions and auth providers via npm
Weaknesses
- No built-in LLM features; the AI role is only generating config for you
- Logic lives in YAML operators, which gets awkward for complex behavior
- Custom UI beyond the provided blocks requires writing npm plugins
- README promotes the maintainer's paid app-building service alongside the project
- JavaScript
- Needs Node.js
More in App builder starters
Building with these?
We help teams pick an open-source AI stack and run it in production. Client work never changes a rank.