Alternatives
Products that do what Quorum-free replicated state machine built atop S3 does
Hi HN, I’m sharing the alpha release of S2C, a state machine replication system built atop S3. The goal is to enable a distributed application to maintain consistent state without needing a quorum of nodes for availability or consistency. The idea came from a side project that was using S3 and where I needed strongly consistent distributed state but wanted to avoid adding a separate consensus dependency. I initially tried to use S3 directly for coordination, but it became messy. Eventually, I realized I need a replicated state machine with a deterministic log, and then it ended up as a…
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This is a long-running project that started as the proverbial need to scratch my own itch and then somehow evolved into a full-time job of the past 6 years. Link: https://bvckup2.com I thought I'd do a Show HN for two reasons. 1. I obviously want to show my baby to those who haven't seen it. Its primary purpose is to do very fast file replication. If you are familiar with "robocopy /mir" - same idea, but on steroids. Lots of them. It can be used for both mirroring and archiving backups, among other things. It is light, very small and it is really quite fast. Half of the…
2019 · bvckup2.com
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PicoMQ is a Rust server for Durable Streams, built on Object Store. Cheap, URL-addressable, granular streams (create/append/read/long-poll/SSE), with Pico Protocol or Durable Streams Protocol as the facade. S3Stream is the stream storage primitive, used in AutoMQ, shipped as a Rust library. Coordination is a command log in Postgres.
13d ago · picomq.com
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I've been working on Polign and built a small prototype around something I've been thinking about with agent memory. I have built a lightweight/stateless vector db + BM25 search which works really well with typed facts and structured queries. It uses your own S3, or GCS bucket as primary storage, and restarting a node is fairly quick. Demo + writeup: https://polign.com/blog-edge-agent-memory Live search demo: https://demo.polign.com Docs: https://polign.com
11d ago · polign.com
- 6SF
Hey hn! I hope you're all doing well. I’d like to share a new open-source database I’ve designed and written called SuperMassive. SuperMassive is a scalable, distributed, in-memory key-value database designed from the ground up to allow for high concurrency, fast writes, fault tolerance, and durability while remaining simple to use and efficiently scalable. The idea for SuperMassive comes from its name.. I wanted to build a key-value database that can scale infinitely, remain durable, be self-healing, consistent, and blazing fast. I also wanted to simplify sharding and replication compared…
2025 · github.com
- 7PB
Hi HN, have been working on this as a side project, would appreciate any feedback :) LogUnify is built around schemas based on protobuf and all the events in LogUnify are structured. By schematizing events, we offer the following benefits: - Consistency: All the events across all platforms and languages are produced in a uniform way with the generated type-safe SDKs, which ensures data consistency from the root. - Shared Understanding: Event schemas with rich data types and metadata are self-explained, which enables different departments from developers to business stakeholders to share the…
2023 · logunify.com
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4 months ago, our announcement for our free, multi-node, petabyte-scale time-series database generated 200+ comments: https://news.ycombinator.com/item?id=23272992 Many commented on the Timescale License, our source-available license governing advanced features (eg multi-node). Most were positive, but some pointed out drawbacks (who says HN can't be productive!). That spurred an internal debate. Today we're happy to share an updated Timescale License with new rights, including the "right-to-repair" and "right-to-improve." And we’re doubling-down on our community, making all…
2020
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Over the past few months, as we scaled our internal AI Agents, we hit a dead end: Running LLM-generated arbitrary code in Docker is basically running naked on security due to container escape risks. But using full traditional VMs takes minutes to boot and eats too much memory to support high-density concurrency. We loved the developer experience of SaaS sandboxes on the market, but they are closed-source, expensive, and have too high a barrier to entry for self-hosting. So, our team decided to build our own. After months of grinding, using RustVMM and KVM, we built a blazing-fast,…
Apr 2026 · github.com
- 10CS
Hi HN, Alexey from Chainstack here. We built Chainstack Self-Hosted to package everything we’ve learned from 8+ years of running blockchain nodes into a single control panel. The goal we’re building this product around is to make blockchain infrastructure boring to operate. The software is free to install. You only pay for the infrastructure you run it on. The quickest way to get hands-on with it is through the Vultr Marketplace or one of the other providers listed in the docs. The current release supports Ethereum Mainnet, Sepolia, and Hoodi with Reth + Prysm full nodes. We’ll be adding…
Jun 2026 · docs.chainstack.com
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Hi HN: Just released moments ago my project AlwaySyncd.com – A dedicated and encrypted BTSync endpoint. It solves the problem of only being able to synchronize your devices when they are all online. Now you do not have to leave your computer or laptop on 24/7. Sync your laptop with your desktop with your phone with your work computer from anywhere and anytime. All your data is encrypted with 256-AES before you send it to our servers. We can never see your data. http://www.AlwaySyncd.com This is a beta and there are 40 spots available immediately. During the beta we allow you…
2014
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Hey HN - Today we launched a new globally available Serverless platform that thinks about simplicity and DX first and foremost. Let us know what you think - try it now for free. Traditional serverless functions are islands. Each function handles a request, does its work, and forgets everything. Need one function to talk to another? You’ll be making HTTP calls over the public internet, managing authentication between your own services, and dealing with unnecessary network latency for simple internal operations. This architectural limitation has held back serverless adoption for complex…
2025
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We open-sourced the TLA+ and Fizzbee verified spec behind Ursa's storage engine. Verification across ~200K states caught a design bug that years of production missed. We then handed the spec to Claude Code — it produced a working Rust implementation (concurrent producers, compaction, fencing) without back-and-forth. We think verified specs are the best harness for coding agents: open-source the spec, let anyone implement it.
Apr 2026 · github.com
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Hi, over the past few months I've been working on this project: Numax is a small Rust runtime that does three things: it runs WebAssembly modules in a sandbox, has a built-in local key-value store, and syncs everything across nodes with CRDTs and gossip. Basically, you write a wasm module, run it on two machines, and they converge (I hope !). It's a decentralized system... I hope someone finds it interesting! There's a whitepaper I've put a lot into, and I think the code isn't bad either! I believe there's still room in this world for software that's fun and well made, and while building…
Jun 2026 · github.com
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I got tired of AI agents forgetting what they were doing the moment their context window filled. The current industry solution is to write massively bloated agent harnesses full of defensive spaghetti just to stop models from drifting. The problem is treating chat history as project state. A conversation is not a ledger. Castra is a compiled Go binary that strips orchestration rights from the LLM. State lives in an encrypted, local SQLite database (castra.db). The LLM is just a stateless executor — it reads the DB, executes a highly constrained task, and the result is written back subject to…
Apr 2026 · github.com
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I’ve been working on a multi-agent academic research lab, and I wanted to share it here today primarily to give a massive shoutout to the developers behind ZeroClaw. When designing the architecture for this, I needed an autonomous agent runtime that was lightweight, entirely agnostic, and highly secure for local execution. ZeroClaw’s pure Rust implementation provided exactly the zero-overhead foundation the project required. Because they solved the core runtime execution so elegantly, I was able to spend my time building the higher-level orchestration on top of it—like the retrieval graph…
Mar 2026 · rainlabteam.vercel.app
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Hi Hacker News! We're Jan & Wilco from ReJot (https://rejot.dev). With ReJot we're building a framework that turns the write-ahead log of your database into an asynchronous communication channel for your services. ReJot enables application developers to define how the database tables they own should be replicated to other databases. Something we wish we had at in our previous job at a large fintech. There is a gap between building internal (REST) APIs and Kafka (event streaming) to share data between services. Internal APIs start to break down when you have more than a couple…
2025 · github.com
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hey hey! I'm the co-founder of squads -- a product that makes it easy to see what your friends and top investors are doing in web3. This product was developed out my own frustration trying to get more involved in web3. One of the greatest challenges in the crypto space is figuring out where to start. For some of us, we're lucky to have a friend who can serve as a guide, and we wanted to build a product that would make introducing your friends to crypto a more inviting experience. There is so much alpha and information living on Twitter + Discord, but the problem is finding the signal from…
2022 · beta.squads.xyz
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Hey HN, We're thrilled to introduce you to Edginary, our new groundbreaking startup set to change how developers access and scale their data globally. We've all felt the pain points of dealing with centralized data sources: performance bottlenecks, reliability issues, and the dreaded revenue loss due to downtime. Edginary is here to tackle these issues head-on. Edginary is a serverless platform that moves your data close to your users in real-time so they can access it in ultra low-latency. By reducing the load on your servers and databases, we aim to not only improve performance and…
2024 · edginary.io
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Starting from version 3.0, it comes with a high availabilty (=safe)
2023 · github.com
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Hi HN, I built t4, a datastore that stores its WAL and snapshots in S3. Instead of traditional storage, it writes append-only segments to object storage and reconstructs state from checkpoints + WAL. A side effect of this model is that the database becomes naturally versioned: you can restore any past state, branch from any point (with copy-on-write) and replay history I started this as an experiment to replace etcd in Kubernetes, but it’s evolving into a general-purpose versioned state store. Curious what people think about it and appreciate any feedback!
Apr 2026 · github.com
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I've been a big fan of fly.io with it’s devx, but cold starts and pricing have been a consistent problem. Even for side projects it's painful if they take 30s to load, it just kills the whole experience. With coding agents becoming good, there were a lot more things I started building, and I just wanted to run all of those things! GCI was built to solve this. It’s just a CLI, just uses ssh to interact with your target machine, and relies on docker swarm to get your services running (docker swarm is IMO underrated, providing benefits even with a single node). It can deploy on any machine that…
Mar 2026 · github.com
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