Life & fun · alternatives · 2026
24 alternatives to LazyPromise = Observable – Signals
A Promise-like primitive which is lazy/cancelable, has typed errors, and emits synchronously instead of on the microtask queue. In a way LazyPromise is what you get if you take an Observable and make it impossible to misuse it for what the Signals were built to do.
LazyPromise is a Promise-like primitive that operates lazily and can be canceled, with support for typed errors and synchronous emission rather than microtask queue delays. It combines Observable patterns with… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.
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Composable async primitives with cancelation, control over scheduling, and coroutines. Superior replacement for JS Promises. - mitranim/posterus
2017 · github.com · its alternatives →
- 2
A tiny (~1kB minzipped) and extremely fast library for creating reactive observables via functions. - maverick-js/signals
2022 · github.com · its alternatives →
- 3
superlog▲497Hey HN, we’re Nico and Arseniy, co-founders of Superlog (https://superlog.sh). We're building a self-installing, self healing observability tool meant not to be opened. It has a wizard that daily sets up proper logging and an agent that investigates errors and opens PRs. Super short demo: https://www.youtube.com/watch?v=xFhU9Mk247M. In our earlier startups, we tried Sentry, Datadog, Grafana, Dash0, and nothing was good enough. Proper telemetry and alerting still requires a ton of manual setup. We struggled with adding good logs, so debugging was tough, especially as…
Jun 2026 · superlog.sh · its alternatives →
- 4
Hey HN! Roughly 4 years ago I started building a lazy functional iteration library for JS/TS. I had a few goals for the library: - Supporting sync, sequential async, and concurrent async iteration - Limiting it to a small number of orthogonal concepts that compose beautifully to solve problems - Making it fully tree-shakeable I built it for myself and have (mostly) been its only user as I refined it. I've used it in lots of personal projects and really enjoyed it. I recently decided it would be nice to spread that enjoyment so I created a documentation website complete with a playground…
2024 · lfi.dev · its alternatives →
- 5
Twist 2.0▲291For teams burnt out by real-time chat, work async, not ASAP
2021 · twist.com · its alternatives →
- 6
Actor runtime and distributed systems framework for Rust - LeonHartley/Coerce-rs
2019 · github.com · its alternatives →
- 7
C++14: bringing in those expressions that you wish you had, Lazily evaluated, compossible generators, maps, filters, ranges and more... - GitHub - SaadAttieh/lazyCode: C++14: bringing in those expressions that you wish you had, Lazily evaluated, compossible generators, maps, filters, ranges and more
2018 · github.com · its alternatives →
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An open source observability stack for your backends
2023 · autometrics.dev · its alternatives →
- 10
With zero AI generated content. ;-)
2024 · lazyvim-ambitious-devs.phillips.codes · its alternatives →
- 11
Search without ads or tracking. View results how you want.
2021 · lazyweb.ai · its alternatives →
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JavaScript engine + state machine with threads and without callbacks - amaksr/nsynjs
2017 · github.com · its alternatives →
- 13
Hi HN - Peter from DBOS here with my co-founder Qian (qianl_cs) Today we want to share our TypeScript library for lightweight durable execution. We’ve been working on it since last year and recently released v2.0 with a ton of new features and major API overhaul. https://github.com/dbos-inc/dbos-transact-ts Durable execution means persisting the execution state of your program while it runs, so if it is ever interrupted or crashes, it automatically resumes from where it left off. Durable execution is useful for a lot of things: - Orchestrating long-running or…
2025 · github.com · its alternatives →
- 14
local-first MCP discovery runtime for agents — search before invoke, reduce prompt bloat, and route to local MCP tools - mcp-shark/lazy-tool
Mar 2026 · github.com · its alternatives →
- 15
Hey HN, I’m sharing ts-chan, an NPM package providing Go-like concurrency primitives, including channels and select statements, for TypeScript and JavaScript, supporting Node.js, Deno, Bun, and browsers. This is something I've built to make implementing Go-style "control loops" feasible in JavaScript, but there are many possible applications. Highlights: - Features a FIFO processing Chan class and versatile Select class for concurrency control. - Supports buffered channel and channel close semantics very close to Go's. - TypeScript-first implementation. - Defines a simple "channel protocol"…
2023 · github.com · its alternatives →
- 16
Python Library for Lazy Interfaces. Contribute to bwasti/lazy development by creating an account on GitHub.
2018 · github.com · its alternatives →
- 17
Hey everyone, I built reaktiv, a small reactive signals library for Python, inspired by Angular’s reactivity model. It lets you define Signals, Computed Values, and Effects that automatically track dependencies and update efficiently. The main focus is async-first reactivity without external dependencies. Here is an example code: ``` import asyncio from reaktiv import Signal, ComputeSignal, Effect async def main(): count = Signal(0) doubled = ComputeSignal(lambda: count.get() * 2) async def log_count(): print(f"Count: {count.get()}, Doubled: {doubled.get()}") Effect(log_count).schedule()…
2025 · github.com · its alternatives →
- 18
Launch your autonomous business on Lovable
Mar 2026 · lazyunicorn.ai · its alternatives →
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A thoughtfully designed reactive programming framework in Swift - gokulnair2001/Pledge
2025 · github.com · its alternatives →
- 21
Observable Slim is a singleton that utilizes ES6 Proxies to observe changes made to object graphs. Originally built to assist with state management, one-way data binding, and any situation where an application must be reactive to data store changes. - ElliotNB/observable-slim
2018 · github.com · its alternatives →
- 22
🚄 Library for queuing asynchronous functions - useful in interfacing with rate limited APIs or memory intensive operations - Arrow7000/qew
2020 · github.com · its alternatives →
- 23
2014 · github.com · its alternatives →
- 24CJ
2015 · yangmillstheory.github.io · its alternatives →
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- A tiny and fast reactive observables library via functions alternatives
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- Coerce – Actor runtime for Rust using async/await and tokio channels alternatives
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 →