llamacoder vs open-agents
Two of the top app builder starters, side by side: score, setup, license, activity and what each review found.
llamacoder
Open-source Claude Artifacts clone generating React apps with Llama
open-agents
Reference app for background coding agents on Vercel sandboxes
| What we compare | llamacoder | open-agents |
|---|---|---|
| Score parts, out of 100 | ||
| Adoption | 61, popular | 42, known |
| Freshness | 100, active | 86, active |
| Maintenance | 37, patchy | 0, weak |
| Easy to run | 0, hard | 33, some setup |
| Agent-ready | 70, partly | 70, partly |
| Facts from GitHub and the README | ||
| Stars | 7.1k | 5.8k |
| License | MIT (permissive) | MIT (permissive) |
| Last commit | Sep 2026 | Jun 2026 |
| Last release | None published | None published |
| Language | TypeScript | TypeScript |
| Docker | No | No |
| GPU | Not needed | Not needed |
| arm64 or Apple Silicon | Not stated | Not stated |
llamacoder
Next.js App Router app with Tailwind that sends a prompt to Llama 3.1 405B on Together AI and renders the generated React app in a sandboxed iframe using esbuild-wasm and esm.sh. Needs TOGETHER_API_KEY, a Postgres DATABASE_URL via Prisma (Neon suggested) and S3 credentials for screenshot uploads; Braintrust tracing is optional. For developers building a prompt-to-app demo on open models.
Who it is for: Developers building a prompt-to-app demo on open models
Strengths
- In-browser preview via esbuild-wasm and esm.sh; no server sandbox cost
- Prisma and Postgres persistence for generated apps
- Braintrust observability wired as an optional env var
- Live deployment at llamacoder.io shows the finished product
Weaknesses
- Together AI only; no provider abstraction
- Screenshot upload requires five S3-related env vars
- No auth or rate limiting described
- No .env.example
- TypeScript, Together AI (Llama 3.1 405B)
- Needs Together AI API key, PostgreSQL (Neon), S3 bucket for screenshots, Braintrust (optional)
open-agents
pnpm monorepo (web app, agent, sandbox and shared packages) where a Next.js app with Better Auth (Vercel and GitHub OAuth) starts durable Workflow SDK runs that drive an agent with file, shell, search and web tools against isolated Vercel sandboxes with snapshot resume. Needs Postgres and a GitHub App for clone, push and PRs; Redis and ElevenLabs voice are optional. For teams forking a hosted coding agent on Vercel.
Who it is for: Teams building a hosted background coding agent on Vercel
Strengths
- Agent runs as a durable workflow outside the sandbox, resumable by reconnecting
- GitHub App integration for repo access, auto-commit, push and PR
- Better Auth with Vercel and GitHub providers wired
- pnpm run ci covers lint, typecheck, tests and migration check
Weaknesses
- Tied to Vercel Sandbox and Workflow SDK; not portable off Vercel
- Setup needs a Vercel OAuth app, a GitHub App and six GitHub env vars
- Model provider configuration is not described in the README
- TypeScript
- Needs PostgreSQL (Neon), Vercel Sandbox, Vercel OAuth app, GitHub App, Redis (optional), ElevenLabs (optional)