Building in the
open.
We publish what we build, fix the bugs we find upstream instead of patching them in private, and pay the projects we depend on. The commitments below are specific enough to hold us to.
What Hanzo is built on
The projects our platform actually runs on, each with its licence and the people who maintain it.
The database underlying all our stateful services
PostgreSQL LicenseOur Stewardship Commitments
We hold ourselves to explicit, public commitments — not vague marketing language.
We ship open source first
Every tool we build for ourselves gets published. If it's useful to us, it belongs to the community. No internal-only forks.
We contribute upstream
When we find bugs or missing features in projects we depend on, we fix them upstream — not in private patches.
We never lock in what we open
Anything published under MIT or Apache-2.0 stays that way. We will never relicense open repos to extract commercial value.
We credit our foundations
Our platform is built on hundreds of open-source projects. We acknowledge, link to, and financially support the communities and maintainers who make this possible.
We fund what we depend on
Through GitHub Sponsors, Open Collective, and direct partnerships, we invest back into the projects that power Hanzo.
We welcome all contributors
Good code can come from anywhere. We maintain a contributor-friendly CONTRIBUTING.md, respond to PRs within 48 hours on active repos, and recognize every contributor.
20% to the author of the code that runs
Verify that you own a repository, and every org that deploys a project built from it pays you 20% of its metered spend, accrued each period.
OSS Catalog
Open source tools, templates, and infrastructure for building AI applications
Quick Start Collections
46 results
Hanzo Picks
Hanzo Dev
hanzoai/dev
AI coding agent for your terminal. Multi-agent orchestration, codebase understanding, and PR automation.
Hanzo AI
hanzoai/ai
One API for every model. OpenAI- and Anthropic-compatible, with load balancing, caching, and observability.
Zen4 Ultra
zenlm/zen4-ultra
1.04T MoE frontier model — 32B active parameters, 256K context.
Hanzo MCP
hanzoai/mcp
260+ tools for AI models via Model Context Protocol. File ops, browser, search, memory, and more.
Zen4 Coder Flash
zenlm/zen4-coder-flash
31B MoE fast code model — 131K context, 59.2% SWE-bench, tool calling.
Zen Omni
zenlm/zen-omni
Multimodal text + vision + audio model — cross-modal reasoning.
Hanzo Chat
hanzoai/chat
Enhanced ChatGPT-style UI with multi-model support, plugins, and MCP integration.
Zen4 Max
zenlm/zen4-max
30B MoE unbiased AI model — 3B active parameters, efficient inference.
Hanzo UI
hanzoai/ui
React component library for AI applications.
Zen4 Coder
zenlm/zen4-coder
80B MoE code model — abliterated open weights for generation, review and debugging.
Zen4
zenlm/zen4
8B dense model — abliterated open weights, refusal bias removed.
Python SDK
hanzoai/python-sdk
Flagship Python SDK — models, agents, tools, memory, and the full Hanzo cloud. pip install hanzo.
Hanzo GUI
hanzoai/gui
Drag & drop UI to build your customized LLM flow and Agents.
Zen VL 30B
zenlm/zen-vl-30b-instruct
30B MoE vision-language model — STEM/code multimodal reasoning.
TypeScript SDK
hanzo-js/sdk
Full cloud SDK for TypeScript/JavaScript. Works in Node.js, browsers, and edge runtimes.
Hanzo Chat
hanzoai/chat
AI chat with MCP integration and multi-provider support.
Ellipsis
ellipsis/ellipsis
Shell-based dotfiles package manager with extensions ecosystem.
Hanzo Bot
hanzoai/bot
Autonomous AI team in a box. Every role, every channel, every platform.
Hanzo Base
hanzoai/base
Hanzo Base — Backend-as-a-Service with realtime and auth.
Zen Coder
zenlm/zen-coder
4B code model — edge deployment.
SQL
hanzoai/sql
Managed relational database with pgvector. SQL and vector search in one store.
Zen Nano
zenlm/zen-nano
0.6B edge model — 40K context, optimized for on-device deployment.
Zen VL 8B
zenlm/zen-vl-8b-instruct
8B vision-language model — 256K context, OCR across 32 languages.
IAM
hanzoai/iam
Identity and access management. RBAC, API keys, OAuth, and SSO.
Hanzo IAM
hanzoai/iam
Identity and access management.
Zen4 Mini
zenlm/zen4-mini
4B unbiased AI model — abliterated, edge deployment.
Zen VL 4B
zenlm/zen-vl-4b-instruct
4B vision-language model — image analysis, OCR, multimodal reasoning.
Go SDK
hanzo-go/sdk
Full cloud SDK for Go. Idiomatic Go with context support and connection pooling.
KV Store
hanzoai/kv
Edge-optimized key-value store. Sub-millisecond reads with global replication.
C++ SDK
hanzo-cpp/sdk
Full cloud SDK for C++. Header-first and idiomatic, built from source.
Policy Engine
hanzoai/authz
Policy-as-code for AI governance. Define rules for model access, data handling, and compliance.
Zen4 Ultra Trainer
zenlm/zen4-ultra-trainer
GT-QLoRA training for 1T MoE models — Gate-Targeted QLoRA for MoE uncensoring.
Swift SDK
hanzo-swift/sdk
Full cloud SDK for Swift. Idiomatic async/await SwiftPM package for iOS, macOS, and server-side Swift.
Kotlin SDK
hanzo-kt/sdk
Full cloud SDK for Kotlin. Coroutine-native client for JVM and Android, installed from JitPack.
GitHub Connector
hanzoai/github-connector
Sync GitHub repos, issues, and PRs. Bi-directional integration.
Sake CLI
sakejs/sake-cli
CoffeeScript/JS build tool, make-like task runner.
Slack Connector
hanzoai/slack-connector
Slack integration for AI workflows. Commands, notifications, and threads.
Approvals
hanzoai/approvals
Human-in-the-loop approval workflows. Review gates for sensitive AI operations.
Hanzo React
@hanzo/react
React primitives for Hanzo.
Hanzo Next
hanzo-js/next
Next.js integration for Hanzo.
Ethereum Reader
hanzo-labs/ethereum-reader
Ethereum blockchain reader.
Contribute & Earn
We welcome contributions of all kinds — code, documentation, bug reports, and feature requests. Every contribution earns a share of compute revenue through our OSS Revenue Sharing program.