fast-agent
★ 3.9k
vs
nab
★ 12
fast-agent vs nab
fast-agent: fast-agent is a CLI-first framework for building and interacting with sophisticated multimodal AI agents and workflows. It offers comprehensive support for various LLM providers, structured outputs, and vision, with unique features like MCP Feature support and live streaming responses to the terminal.; nab: Token-lean web microfetch for LLM agents: any URL → clean markdown via CLI, MCP server, and Claude Code plugin. Real browser-cookie auth, passkeys, anti-bot reach, on-by-default prompt-injection defense, plus on-device multimodal ASR/OCR. A single Rust binary — not a browser.
01
TL;DR
Choose fast-agent if…Rapid development and testing of sophisticated multimodal AI agents and workflows.
Choose nab if…you need ai-agents capabilities
02
Side-by-Side Comparison
03
Features
fast-agent01Sophisticated multimodal Agent and Workflow creation.
02Comprehensive LLM provider support (e.g., Anthropic, OpenAI, Google, Ollama).
03Structured outputs, PDF, and Vision support.
04CLI-first with interactive terminal UI (TUI-style) and live streaming responses.
05Advanced agentic workflows like Chain, Parallel, MAKER, and Agents As Tools.
nab—
04
Use Cases
fast-agent↳Rapid development and testing of sophisticated multimodal AI agents and workflows.
↳Diagnosing and tuning agent applications, including those requiring human input.
↳Implementing advanced agentic patterns for error reduction or complex task decomposition.
nab—
05
Best For
fast-agentTrendingMulti-AgentDev Tooling
nab—
FAQ
FAQ
What is the difference between fast-agent and nab?
Both fast-agent and nab are in the Dev Tooling category. fast-agent has 3.9k stars, while nab has 12 stars.
Which is better, fast-agent or nab?
The best choice depends on your use case. Choose fast-agent if Rapid development and testing of sophisticated multimodal AI agents and workflows., and nab if you need ai-agents capabilities.
Is fast-agent free or open source?
Yes, fast-agent is open source on GitHub (Apache-2.0).
Is nab free or open source?
Yes, nab is open source on GitHub (MIT).
→