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Lightweight Variants

OpenClaw's success produced a wave of smaller, independent agents. Some fit in a 678 KB binary, one runs on a $5 microcontroller, one runs in a browser tab. This page covers the ones worth knowing, grouped by what makes them different.

info

These are community projects, not OpenClaw. Each is an independent codebase with its own config, security model and release cadence. None of them runs OpenClaw skills, plugins or openclaw.json unchanged. Star counts and last-push dates are from gh api as of 2026-10-18; refresh them with node scripts/refresh-stars.mjs.

Quick comparison​

VariantRepoStarsLanguageKey strength
NanobotHKUDS/nanobot49.1kPythonPython-native, many chat apps and providers
ZeroClawzeroclaw-labs/zeroclaw33.0kRustSingle binary, 30+ channels, hardware control
NanoClawnanocoai/nanoclaw31.0kTypeScriptAgents run in containers
PicoClawsipeed/picoclaw30.1kGo$10 boards, ~10-20 MB RAM
IronClawnearai/ironclaw12.7kRustWASM-sandboxed tools, encrypted credential store
NullClawnullclaw/nullclaw8.1kZig678 KB static binary
MimiClawmemovai/mimiclaw5.8kCRuns on an ESP32-S3, no OS
TinyAGI (fka TinyClaw)TinyAGI/tinyagi3.6kTypeScriptMulti-agent teams
MicroClawmicroclaw/microclaw746RustLean multi-channel bot
Tiny Clawwarengonzaga/tinyclaw295TypeScriptIndependent design, model routing
VibeClawjasonkneen/vibeclaw135TypeScriptRuns in the browser
JSClawjsclaw/jsclaw1JavaScriptContainer-orchestration library

Zero install: browser​

VibeClaw​

Runs an OpenClaw-style agent in a browser tab via almostnode (Node.js in the browser with a virtual filesystem). Visit vibeclaw.dev, pick a personality and chat. A sandbox mode runs entirely client-side with no persistence; a live-gateway mode connects to a running OpenClaw Gateway.

  • 135 stars, AGPL-3.0, last push 2026-04-21 (quiet since spring).
  • Best for: demos and workshops, trying the idea before installing anything.

Ultra-lightweight and embedded​

NullClaw​

A 678 KB static Zig binary (Zig 0.16.0) with about 1 MB of RAM and under 2 ms startup, per its README. It claims 50+ providers, 19 channels, 35+ tools, MCP and GPIO/I2C/SPI peripheral control.

  • 8.1k stars, MIT, last push 2026-10-08.
  • Best for: edge devices and anywhere memory is measured in megabytes.

PicoClaw​

Sipeed's agent, written from scratch in Go (not a fork) and inspired by Nanobot. It targets $10 hardware such as Sipeed's LicheeRV boards, and also ships an Android APK and a system-tray build for Windows and Linux. It supports MCP, many chat channels (Telegram, Discord, Matrix, IRC, WeChat/WeCom and others) and multiple providers.

  • 30.1k stars, MIT, latest release v0.3.1 (2026-07-03), last push 2026-10-15.
  • The README itself warns that it is in early, fast development, "may have unresolved security issues", and should not go to production before v1.0. It also says the only official site is picoclaw.io, and that PicoClaw has issued no token: crypto "PicoClaw" tokens are scams.
  • Best for: cheap RISC-V and ARM boards, hardware experiments.
note

An unrelated, inactive repo, AbuZar-Ansarii/PicoClaw (36 stars, no push since March 2026), shares the name. The PicoClaw people mean is sipeed/picoclaw.

MimiClaw​

A pure C agent on an ESP32-S3 (16 MB flash, 8 MB PSRAM), with no Linux and no Node.js. It talks to an LLM API over Wi-Fi, keeps MEMORY.md/SOUL.md-style files in flash, and uses Telegram as its interface. It also does web search, OTA updates, scheduled jobs and GPIO.

  • 5.8k stars, MIT, last push 2026-10-04.
  • Build and flash with ESP-IDF following the repo README.
  • Best for: always-on IoT endpoints at about 0.5 W.

Security-first​

NanoClaw​

Runs each agent in its own container (Docker, or Apple Containers on macOS), built on Anthropic's Agents SDK. Per its README it connects to WhatsApp, Telegram, Slack, Discord, Gmail and other apps, with memory and scheduled jobs. The repo moved from gavrielc/nanoclaw to nanocoai/nanoclaw.

  • 31.0k stars, MIT, last push 2026-10-18.
  • Container isolation limits what a misbehaving agent can reach, but it is not escape-proof: you still need sensible mounts, network policy and credentials hygiene.
  • Best for: multi-user setups and handling sensitive data in a small codebase.

IronClaw​

NEAR AI's Rust "Agent OS focused on privacy, security and extensibility". Untrusted tools run in WASM sandboxes with capability permissions, secrets are injected at the host boundary rather than exposed to tools, outbound HTTP is allowlisted, and there is an optional Docker sandbox for jobs. Channels include a REPL, HTTP webhooks, Telegram and Slack (as WASM channels) and a web UI. Install from a pinned ironclaw-v* release, then run ironclaw onboard, as the README describes.

  • 12.7k stars, Apache-2.0, latest release ironclaw-v1.4.1 (2026-09-29), last push 2026-10-18.
  • Best for: people who want stronger tool isolation by default.
note

JoasASantos/ironclaw (83 stars, last push 2026-02-18) is a different project with the same name. The "13-layer, 432+ security tests" claims that circulated earlier come from that repo, not from NEAR's.

ZeroClaw​

A single Rust binary that, per its README, talks to Anthropic, OpenAI, Ollama and about 20 other providers, reaches 30+ channels (Discord, Telegram, Matrix, email, voice, webhooks), and acts through shell, browser, HTTP, hardware and MCP tools. It adds workspace boundaries, command policies and OS-level sandboxes.

  • 33.0k stars, Apache-2.0, latest release v0.8.6 (2026-10-18).
  • Best for: combining a software agent with hardware automation in one binary.

Python​

Nanobot​

The University of Hong Kong's (HKUDS) Python agent and the most-starred variant. Its README now describes it as a self-hosted agent framework "with WebUI, tools, memory, MCP, multi-agent workflows, automation, and chat apps". The early "4,000 lines" claim is no longer made.

  • 49.1k stars, 8.6k forks, MIT, latest release v0.3.5 (PyPI nanobot-ai), last push 2026-10-18.
  • Best for: Python shops, research and quick prototyping across providers.

Multi-channel and teams​

MicroClaw​

A Rust chat agent inspired by NanoClaw: multi-step tool use, scoped persistent memory, MCP servers and optional SQLite memory. Channels: Telegram, Discord, Slack, Feishu/Lark, IRC, a web UI and optional Matrix.

  • 746 stars, MIT, last push 2026-10-18.
  • Best for: a small VPS where you want Rust efficiency.

TinyClaw and TinyAGI​

Two different projects have used this name:

  • Tiny Claw (warengonzaga/tinyclaw, 295 stars, GPL-3.0, last push 2026-10-13). An independent framework, explicitly not a smaller OpenClaw, with its own personality engine, a web UI, adaptive memory and cheap/strong model routing.
  • TinyAGI (TinyAGI/tinyagi, 3.6k stars, MIT, last push 2026-03-30). Formerly jlia0/tinyclaw, now "the agent teams orchestrator": multiple isolated agents in teams, Discord/WhatsApp/Telegram, a browser dashboard and a SQLite queue. It uses the Claude Code or Codex CLI as its provider backend.

Libraries​

JSClaw​

A JavaScript (ESM) library for running Claude agents in Docker containers with filesystem-based IPC, inspired by NanoClaw. It also includes a small OpenClaw-shaped gateway and CLI. See the README for its actual API; there is no spawn() function.

  • 1 star, AGPL-3.0, last push 2026-06-12. Treat it as a proof of concept.

Mobile​

For an always-on phone, use the official OpenClaw apps. They are companion nodes that pair with a Gateway running elsewhere: iOS on the App Store and Android on Google Play.

Natfii/ZeroClaw-Android (308 stars) is archived (last push 2026-03-07). Do not start new setups on it.

Decision framework​

By constraint​

ConstraintPick
No install at allVibeClaw (browser)
Under 1 MB binaryNullClaw
$5-10 hardwareMimiClaw (ESP32) or PicoClaw
PhoneOfficial OpenClaw iOS/Android app, paired with a Gateway
$5/month VPSMicroClaw, NanoClaw or PicoClaw
A real serverOpenClaw

By priority​

PriorityPick
Tool isolation by defaultIronClaw (WASM) or NanoClaw (containers)
Smallest footprintNullClaw
Most features in one binaryZeroClaw
Fastest to tryVibeClaw
PythonNanobot
Hardware/IoTMimiClaw, PicoClaw or ZeroClaw
Agent teamsTinyAGI

Variant or OpenClaw?​

Use OpenClaw when you want the full feature set (Control UI, Automations, the Secret Store, approvals, native apps), ClawHub skills and plugins, and official docs at docs.openclaw.ai.

Use a variant when your hardware cannot run Node.js 24, you want a smaller attack surface or code you can read in an afternoon, you are in a Python-only environment, or you want to try the idea with no install.

Whichever you run, an agent with shell, files, email or browser access needs approvals and isolation. For OpenClaw, see Security Hardening; for a variant, read its own security notes first.

See also​