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Life & fun · alternatives · 2026

24 alternatives to localsync – Real-time state synchronization over multiple browser tabs

Real-time browser state synchronization across multiple tabs. - noderaider/localsync

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. localsync – Real-time state synchronization over multiple browser tabs launched in 2017; newer entries below may have overtaken it.

  1. 1
    OneCal▲323

    Synchronize your calendars in real-time

    2022 · onecal.io · its alternatives →

  2. 2

    Hey HN! Wanted to share a new library and server I've recently been working on called remoteStorage. When building frontends with Javascript, the native localStorage API is super useful for keeping track of state between sessions in the same browser, but it's not as good a solution when your data needs to be shared across multiple devices or browsers. For instance, let's say you want to show a welcome modal to all new users that sign up for your product. If you use localStorage to track if a user has already seen this modal, your users will end up getting the experience repeatedly every time…

    2024 · github.com · its alternatives →

  3. 3RT
  4. 4SR

    I’m Chris McCord, a programmer with a passion for science and building things. I spend my time crafting the Phoenix Framework, working with …

    2013 · chrismccord.com · its alternatives →

  5. 5

    Remote-controlled countdown timer

    2022 · stagetimer.io · its alternatives →

  6. 6
  7. 7

    Watch videos with friends online in real time

    2018 · vynchronize.herokuapp.com · its alternatives →

  8. 8

    Hi HN, Today we’re launching PowerSync, a Postgres<>SQLite bi-directional sync engine that enables an offline-first app architecture. It currently supports Flutter, React Native and web (JavaScript) using Wasm SQLite in the browser, with more client SDKs on the way. Conrad and I (Ralf) have been working on our sync engine since 2009, originally as part of a full-stack app platform. That version of the system is still used in production worldwide and we’ve learnt a lot from its use cases and scaling. About a year ago we started on spinning off PowerSync as a standalone product that is…

    2023 · powersync.com · its alternatives →

  9. 9

    A hand-rolled real-time Node.js framework for connecting single page apps - psugihara/joint

    2012 · github.com · its alternatives →

  10. 10

    🚀 Realtime Monitoring solution for Node.js/Express.js apps, inspired by status.github.com, sponsored by https://dynobase.dev - RafalWilinski/express-status-monitor

    2016 · github.com · its alternatives →

  11. 11

    A state management library for React & JS apps

    2020 · syncstate.github.io · its alternatives →

  12. 12

    Easily communicate among browser tabs

    2017 · engineering.wingify.com · its alternatives →

  13. 13

    DropBox/GoogleDrive-style 2-way sync using rsync and fswatch - francoisp/DuplexRsync

    2019 · github.com · its alternatives →

  14. 14

    Dynamic Real-time Heatmaps for the Web

    2014 · patrick-wied.at · its alternatives →

  15. 15

    A scalable realtime engine for Node.js

    2015 · socketcluster.io · its alternatives →

  16. 16

    Keep your website current – no coding required

    2024 · syncvariables.com · its alternatives →

  17. 17

    utility library for async iterable iterators. Contribute to crcn/mesh.js development by creating an account on GitHub.

    2015 · github.com · its alternatives →

  18. 18

    A flexible GraphQL client and server library that can be used to power realtime applications. - tjmehta/primus-graphql

    2018 · github.com · its alternatives →

  19. 19

    Node library for empowering real-time applications at scale - team-emt/razorframe

    2016 · github.com · its alternatives →

  20. 20
  21. 21

    Easy communication between cross-origin browser tabs. Simplified "CORS"ing! - wingify/across-tabs

    2017 · github.com · its alternatives →

  22. 22CE

    Join us in SF or online on October 22

    2022 · nextjs.org · its alternatives →

  23. 23
    Syncify▲88

    Reduce time spent in meetings

    2022 · getsyncify.com · its alternatives →

  24. 24

    syncs your local folder with remote folder using scp - serkanyersen/sync

    2013 · github.com · its alternatives →

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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 →