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Top 23 Realtime Open-Source Projects
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supabase
The Postgres development platform. Supabase gives you a dedicated Postgres database to build your web, mobile, and AI applications.
Project mention: How to Set Up a Free Cloud Database and Add Your First Table with Supabase | dev.to | 2026-09-30Navigate to supabase.com and select Start your project.
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AppSignal
AppSignal knows why the f*#k it crashed. Stop vibe-debugging. Every exception, every backtrace, grouped so you see patterns, not noise.
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Redis
For developers, who are building real-time data-driven applications, Redis is the preferred, fastest, and most feature-rich cache, data structure server, and document and vector query engine.
Project mention: Count-Min Sketch: contar millones de eventos con kilobytes de RAM | dev.to | 2026-09-05 -
I built this because I self host a lot of stuff and wanted to simplify tossing up a simple static site with no backend, no NGINX/Caddy/Traffik configs, instantly deploy with a single file copy. Powered by Golang's built-in reverse proxy package.
Another awesome freebie is this is built on top of [Pocketbase](https://pocketbase.io/), so the whole app is API driven for free. This gives you some AI integration points off the bat.
Great for whipping up demos to pitch to clients, or quick and dirty temporary static sites to share with friends, family or coworkers.
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Project mention: Meteor 3.5: accounts-express Brings Meteor Accounts to Express | dev.to | 2026-08-24
That feedback is already shaping the next practical step. We are working toward configurable login and logout endpoints plus long-lived API tokens, extending the accounts-express use case without losing the connection to Meteor Accounts. It is a concrete example of how real application needs can guide what comes next.
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Project mention: Frigate NVR surfaces: 4,999 fingerprinted instances and what a camera console exposes | dev.to | 2026-10-09
Frigate documentation: https://frigate.video/
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RxDB
The local-first database that runs on every JS runtime and replicates with your existing backend - no vendor, no lock-in - https://rxdb.info/
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bandit has been created as an alternative to cowboy, fully coded in Elixir and designed to be integrated and highly compatible with the Phoenix framework. When it came out few years ago, the community did a lot of noise and I never find a moment to test it. bandit supports HTTP/1.1 and HTTP/2 natively. WebSockets protocols support can be added with the help of WebSock and WebSockAdapter modules. At this time, it does not support HTTP/3 (yet?).
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Project mention: I Built a Real-Time Collaborative Sheet Music Editor — Here's What MusicXML and CRDTs Taught Me | dev.to | 2026-08-15
For multiplayer editing I used Yjs, a CRDT (Conflict-free Replicated Data Type) library — no server-side conflict resolution, edits from multiple clients converge automatically, the same approach Google Docs and Figma use.
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Project mention: Bending Spoons makes first post-IPO acquisition with $1.3B Airtable deal | news.ycombinator.com | 2026-08-04
I've heard good things about https://teable.ai/ for airtable-like flexibility
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Documentation
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Project mention: Revelium Studio turns a single image into a navigable 3D Gaussian Splat model | news.ycombinator.com | 2026-01-09
That's a pretty well-solved problem at this point. You'll want some kind of NeRF tool and a way to calculate the camera poses of the photos you took. COLMAP is the tool most people use for the latter.
I'd recommend trying Instant Neural Graphics Primitives (https://github.com/NVlabs/instant-ngp) from NVIDIA. It's a couple years old, so not state-of-the-art, but it runs on just about anything and is extremely fast.
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systeminformer
A free, powerful, multi-purpose tool that helps you monitor system resources, debug software and detect malware. Brought to you by Winsider Seminars & Solutions, Inc. @ https://windows-internals.com
Project mention: Show HN: Network Monitor – a GUI to spot anomalous connections on your Linux | news.ycombinator.com | 2025-11-24I wish Linux had two more things:
- https://github.com/winsiderss/systeminformer power-user process explorer
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nakama
Scalable open-source game backend server: multiplayer, matchmaking, leaderboards, chat, and social features for games.
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InsForge
The all-in-one, open-source backend platform for agentic coding. InsForge gives your coding agent database, auth, storage, compute, hosting, and AI gateway to ship full-stack apps end-to-end.
Project mention: Bringing Razorpay to InsForge: Building a Production-Grade Payment Flow | dev.to | 2026-06-08PR #1382 — Foundational Provider & Sync PR #1485 — Webhook Infrastructure PR #1490 — Runtime Payment Flow
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If you are a rust developer, you can just take a look at the examples in the iroh repo itself or in our iroh-examples repo.
None of them require an API key.
https://github.com/n0-computer/iroh/tree/main/iroh/examples
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redpanda
Redpanda is a streaming data platform for developers. Kafka API compatible. 10x faster. No ZooKeeper. No JVM!
Project mention: Top Open-Source Data Engineering Tools- Unravelling the Best in 2026 | dev.to | 2025-12-10Redpanda
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RealtimeSTT
A robust, efficient, low-latency speech-to-text library with advanced voice activity detection, wake word activation and instant transcription.
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NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
Realtime discussion
Realtime related posts
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Frigate NVR surfaces: 4,999 fingerprinted instances and what a camera console exposes
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How to Set Up a Free Cloud Database and Add Your First Table with Supabase
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How to send Shopify orders straight into a cloud database with Python: a beginner's guide
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Show HN: Minimal Static Website Hosting Tool
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Count-Min Sketch: contar millones de eventos con kilobytes de RAM
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Show HN: PicoMQ – Durable Streams over HTTP, on object storage
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Lark: Open-source realtime database, Firebase SDK compatible
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A note from our sponsor - SaaSHub
www.saashub.com | 10 Oct 2026
Index
What are some of the best open-source Realtime projects? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | supabase | 111,296 |
| 2 | Deep-Live-Cam | 96,919 |
| 3 | Redis | 76,579 |
| 4 | pocketbase | 61,271 |
| 5 | Meteor JS | 44,800 |
| 6 | frigate | 36,356 |
| 7 | RxDB | 23,398 |
| 8 | Phoenix | 23,173 |
| 9 | yjs | 22,916 |
| 10 | teable | 21,872 |
| 11 | gun | 19,139 |
| 12 | ZeroNet | 18,762 |
| 13 | instant-ngp | 17,568 |
| 14 | Realm | 16,610 |
| 15 | systeminformer | 16,210 |
| 16 | nakama | 13,473 |
| 17 | InsForge | 13,066 |
| 18 | iroh | 12,672 |
| 19 | redpanda | 12,602 |
| 20 | RealtimeSTT | 10,162 |
| 21 | HackMD | 10,152 |
| 22 | so-vits-svc-fork | 9,340 |
| 23 | AlphaPose | 8,592 |
Sponsored
AppSignal knows why the f*#k it crashed.
Stop vibe-debugging. Every exception, every backtrace, grouped so you see patterns, not noise.
www.appsignal.com