Dev tools · alternatives · 2026

24 alternatives to a Rust library for creating hierarchical state machines

I've come to prefer modeling state machines with nested states, but implementing them by hand requires a large amount of error-prone boilerplate that obscures the important logic of the state machine. I found that the existing offerings in the Rust ecosystem - while inspiring - lacked a number of features that I was looking for, so I spent the last few months building moku. Feedback is welcome!

Moku is a Rust library for building hierarchical state machines with nested states. It reduces boilerplate code that typically obscures state machine logic when implemented manually. The library provides features… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.

1
Coerce – Actor runtime for Rust using async/await and tokio channels▲155
Actor runtime and distributed systems framework for Rust - LeonHartley/Coerce-rs
2019 · github.com · its alternatives →
2
CXXStateTree – A modern C++ library for hierarchical state machines▲48
Hi HN! I've built [CXXStateTree](https://github.com/ZigRazor/CXXStateTree), a modern C++ header-only library to create hierarchical state machines with clean, intuitive APIs. It supports: - Deeply nested states - Entry/exit handlers - State transitions with guards and actions - Asynchronous transitions with `co_await` (C++20 coroutines) - Optional runtime type identification for flexibility It's ideal for complex control logic, embedded systems, games, robotics, and anywhere you'd use a finite state machine. I’d love feedback, use cases, or contributions from the…
2025 · github.com · its alternatives →
3
We made our own inference engine for Apple Silicon▲186
We wrote our inference engine on Rust, it is faster than llama cpp in all of the use cases. Your feedback is very welcomed. Written from scratch with idea that you can add support of any kernel and platform.
2025 · github.com · its alternatives →
4WR
Wagyu – Rust library for generating cryptocurrency wallets▲81
2019 · github.com · its alternatives →
5
Copper – Open-source robotics in Rust with deterministic log replay▲161
Copper is an operating system for robots - build, run, and replay your entire robot deterministically. - Home · copper-project/copper-rs Wiki
2024 · github.com · its alternatives →
6
Maki▲84
An efficient AI coding agent. Native Rust TUI. Immediate startup, 60 FPS, low memory. Indexes files instead of reading them, chains tools in a sandbox interpreter. Anthropic, OpenAI, Google, Z.AI, OpenRouter, Synthetic, or any OpenAI / Anthropic compatible API.
2022 · maki.sh · its alternatives →
7
I built a native app for coding agents with Rust and GPUI▲39
A fast, native app for local coding agents. Amp, Claude Code, Codex, Cursor, OpenCode, Grok, and Pi — one timeline, entirely on your machine.
Aug 2026 · waku.sh · its alternatives →
8
Minikv – Distributed key-value and object store in Rust (Raft, S3 API)▲71
Hi HN, I'm Emilie, I have a literature background (which explains the well-written documentation!) and I've been learning Rust and distributed systems by building minikv over the past few months. It recently got featured in Programmez! magazine: https://www.programmez.com/actualites/minikv-un-key-value-st... minikv is an open-source, distributed storage engine built for learning, experimentation, and self-hosted setups. It combines a strongly-consistent key-value database (Raft), S3-compatible object storage, and basic multi-tenancy. Features/highlights: - Raft…
Feb 2026 · github.com · its alternatives →
9
A simple library for persistent finite-state machines in Go▲10
A finite-state machine library for the Go programming language - calebwin/go-sm
2018 · github.com · its alternatives →
10
Micro JavaScript framework inspired by finite-state machine▲60
UI as finite-state machine . Contribute to stepanvanzuriak/Finite development by creating an account on GitHub.
2018 · github.com · its alternatives →
11
Minigraf – An embedded, bi-temporal graph database in Rust▲41
Embedded graph memory for AI agents, mobile apps, and the browser. - project-minigraf/minigraf
18d ago · github.com · its alternatives →
12
Machine learning (entirely) in Rust▲20
Machine Learning library for Rust. Contribute to AtheMathmo/rusty-machine development by creating an account on GitHub.
2016 · github.com · its alternatives →
13
Tinykv – Minimal file-backed key-value store for Rust▲24
I built tinykv because I kept reaching for simple persistent storage in Rust projects but found existing solutions either too complex (sled) or unmaintained (pickledb). tinykv focuses on simplicity: JSON-based, serde-powered, with optional TTL. Perfect for CLI tools, game saves, config storage. Would appreciate any feedback from the HN community!
2025 · crates.io · its alternatives →
14
Modeling the human body in Rust so I can cmd+click through it▲46
I started this trying to understand two things: why my Asian friends turn red after drinking, and why several friends all seemed to have migraine clusters. I was reading medical papers and textbooks, but kept getting lost jumping between topics. I thought: what if I could just Cmd+Click through this like code? What if "ALDH2 gene" was actually clickable, and took me to the variant, the phenotype, the population frequencies? So I started modeling human biology in Rust with my Ralph agent (Claude in a loop, ty ghuntley). Turns out the type system is perfect for this. Every biological entity is…
2025 · github.com · its alternatives →
15
gline-rs – an inference engine for GLiNER models, in Rust▲5
Hi everyone, wanted to share about gline-rs, an inference engine for GLiNER models written in Rust. This family of lightweight language models proved to be efficient at zero-shot Named Entity Recognition (NER) and other tasks such as Relation Extraction, while consuming less resources than large generative models (LLMs). This implementation has been written from the ground up in Rust, and supports both span- and token-oriented variants (for inference only). The goal is to provide a production-grade and user-friendly API in a modern and safe programming language, including a clean and…
2025 · github.com · its alternatives →
16
Limabean – a new implementation of Beancount in Clojure/Rust▲5
I created this project for my own use, and as a means to develop proficiency in Rust and Clojure. It is now at the stage where it could be useful for others, and my intention is to further develop it so it becomes increasingly useful. I am really enjoying being able to query my accounts from a Clojure REPL. And despite the current prevalence of AI code-generation, this was created by my own bare hands, quite slowly. All feedback welcome, most especially from anyone trying it out.
Mar 2026 · github.com · its alternatives →
17
I made a state machine framework for guided conversations with LLMs▲19
It’s written in Python and I call it GoalChain. It lets you build a conversation flow graph that the user traverses. When there’s enough input it spits out a dictionary with the defined fields. Otherwise it will jump state to state as led by the user. It was fun to write, and it’s surprisingly effective if you keep in mind you’re prompt-engineering every string and field name. README.md has a mini-tutorial. Would be cool to get some ideas for how to build it further and what improvements I could make.
2024 · github.com · its alternatives →
18
I quit my job to build a Kubernetes GUI with Rust▲13
About a year ago I was working on a project with mirrored Kubernetes clusters deployed across various regions. Constantly switching contexts was a big pain for me and I badly needed something more practical to work with multiple clusters, ideally simultaneously. At that time everyone was talking about Rust and I really wanted to try it out. I then found Tauri, a framework to build GUI apps with Rust + JavaScript. I was sold. I learned Rust and built the app I always wanted to use. Fast, lightweight and with the ability to connect to multiple clusters simultaneously. Fast forward to today,…
2023 · aptakube.com · its alternatives →
19
An educational Local Qwen3 LLM Inference project written in Rust▲15
An educational Rust project for exporting and running inference on Qwen3 LLM family - reinterpretcat/qwen3-rs
2025 · github.com · its alternatives →
20
ADK-Rust▲6
Hey everyone! I'm excited to share ADK-Rust - a production-ready implementation of Google's Agent Development Kit in Rust. Why Rust? After working extensively with adk-python in developing an ai agent factory at zavora.ai, I wanted to bring the same powerful agent development patterns to the Rust ecosystem, targeting use cases where: Performance is critical - Rust's zero-cost abstractions and memory safety Deployment size matters - Single binary with no runtime dependencies Systems-level integration - Embedded systems, edge computing, IoT Concurrency at scale - Rust's async/await with…
Dec 2025 · adk-rust.com · its alternatives →
21
Rust-loguru – A flexible Rust logging library like Python's Loguru▲5
I've just released rust-loguru, a logging library for Rust that aims to combine intuitive API design (inspired by Go/Python's Loguru) with Rust's performance characteristics. Some highlights: - Consistently outperforms the standard log crate by 50-80% in benchmarks. - Multiple log levels and an extensible handler system -File rotation with better performance than log4rs and other alternatives - Error handling utilities and context helpers I built this because I wanted a logger that was both ergonomic to use and high-performance. The benchmarks comparing it to slog, log, and tracing are…
2025 · crates.io · its alternatives →
22
Goku ▲9
goku is an http load testing application written in rust
Nov 2025 · github.com · its alternatives →
23
Tilth – I spent tokens so my agents would stop wasting them (~4k Rust)▲10
I'm an "ideas person" who messes around with AI on a low budget. I got tired of watching my tokens vanish and context windows filling up while agents fumbled around trying to find the right thing. Agents don't flail like they used to with shell tools, but there are still weak/blind spots and back-and-forth episodes — especially when using tools in combination/sequence. So I built "tilth" today. Or rather, AI built it — every line is Opus 4.6. I spent a lot of my precious tokens getting it to "not shit" (at least several of the different vendors' AI overlords assure me it's not…
Feb 2026 · github.com · its alternatives →
24
A formally verified native Delta Lake implementation in Rust▲8
A native Rust library for Delta Lake, with bindings into Python - delta-io/delta-rs
2022 · github.com · its alternatives →

Also compare

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →