Life & fun · alternatives · 2026

Siproc is a SIP client designed for users who need to handle multiple calls by spawning separate processes for each connection. Built on primitive functionality, it integrates with SIP protocol systems to manage… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Siproc – A primitive SIP client that spawns processes for each call launched in 2019; newer entries below may have overtaken it.

1. 1
   Comprehensive inter-process communication (IPC) toolkit in modern C++▲88

   If you work in C++, and you would like 2+ programs to share data structures (and/or native I/O handles a.k.a. FDs) among each other, there is a good chance Flow-IPC - will make it considerably less annoying to code than typical approaches; and - may massively reduce the latency involved. Those sharing Cap'n Proto-encoded data may have particular interest. Cap'n Proto (https://capnproto.org) is fantastic at its core task - in-place serialization with zero-copy - and we wanted to make the IPC (inter-process communication) involving capnp-serialized messages be zero-copy,…

   2024 · github.com · its alternatives →

2. 2BA
   Bridge, a cross-language RPC messaging system▲105

   2012 · flotype.com · its alternatives →

3. 3
   Async▲633

   Replace "quick” work calls with supercharged voice messages

   2023 · async.com · its alternatives →

4. 4
   Bring phone calls into the browser (SIP-to-WebRTC)▲154

   Examples of WebRTC applications that are large, or use 3rd party libraries - example-webrtc-applications/sip-to-webrtc at main · pion/example-webrtc-applications

   2024 · github.com · its alternatives →

5. 5CN
   Cap'n Proto, by the ex-maintainer of Protocol Buffers▲286

   2013 · kentonv.github.com · its alternatives →

6. 6
   ZipMessage▲346

   Replace live meetings with async video messages

   2022 · clarityflow.com · its alternatives →

7. 7
   Ruroco – like port knocking, but better▲127

   Hey there HN! ruroco (RUn RemOte COmmand) is a tool that lets you execute commands on a server by sending UDP packets (instead of knocking on ports). the tool consist of 3 binaries: - client -> runs on your notebook/computer and sends the UDP packets - server -> receives the UDP packets and makes sure that they are valid - commander -> runs the command encoded by the data of the UDP packet if it's valid The commands are configured on the server side, so the client does not define what is going to be executed, it only picks from existing commands. I use this tool to open up the SSH port…

   2024 · github.com · its alternatives →

8. 8
   SIPGO – A library for writing fast SIP services in Go▲38

   SIP library for writing fast SIP services in GO. Contribute to emiago/sipgo development by creating an account on GitHub.

   2023 · github.com · its alternatives →

9. 9
   BinaryRPC – Lightweight WebSocket-based RPC framework in modern C++▲78

   Hi HN, I’m a recent CS graduate. During the past few months I wrote BinaryRPC, an open-source RPC framework in modern C++20 focused on low-latency, binary WebSocket messaging. Why I built it * Wanted first-class session support, pluggable QoS levels and a simple middleware chain (global, specific, multi handler) without extra JSON/XML parsing. * Easy developer experience A quick feature list * Binary WebSocket frames – minimal overhead * Built-in session layer (login / reconnect / heartbeat) * QoS1 / QoS2 with automatic ACK & retry * Plugin system – rooms, msgpack, etc.…

   2025 · github.com · its alternatives →

10. 10
    pion/ion, self-hosted conferencing software with single command deploy▲124

    A work-in-progress ION SFU remake. Contribute to pion/ion development by creating an account on GitHub.

    2020 · github.com · its alternatives →

11. 11
    Zipcall▲163

    Decentralised, free browser-based video calling

    2020 · its alternatives →

12. 12
    Commons▲220

    Private Discord for your team to collaborate

    2021 · blog.mozilla.org · its alternatives →

13. 13
    SudoApp▲127

    The 100% private, unlimited messaging and calling app.

    2016 · anonyome.com · its alternatives →

14. 14
    I integrated my from-scratch TCP/IP stack into the xv6-riscv OS▲147

    Hi HN, To truly understand how operating systems and network protocols work, I decided to combine two classic learning tools: the xv6 teaching OS and a from-scratch TCP/IP stack. I'm excited to share the result: my own from-scratch TCP/IP networking stack running directly inside the xv6-riscv (https://github.com/pandax381/xv6-riscv-net) kernel. The project uses a modern virtio-net driver, allowing it to run seamlessly in QEMU and communicate with the host machine. Key features: - From-Scratch Stack: The core is powered by microps…

    2025 · github.com · its alternatives →

15. 15
    Iceoryx2 – Fast IPC Library for Rust, C++, and C▲122

    Hello everyone, Today we released iceoryx2 v0.4! iceoryx2 is a service-based inter-process communication (IPC) library designed to make communication between processes as fast as possible - like Unix domain sockets or message queues, but orders of magnitude faster and easier to use. It also comes with advanced features such as circular buffers, history, event notifications, publish-subscribe messaging, and a decentralized architecture with no need for a broker. For example, if you're working in robotics and need to process frames from a camera across multiple processes, iceoryx2 makes it…

    2024 · ekxide.io · its alternatives →

16. 16
    A small virtual machine written in C▲212

    "interesting" VM in C. Let's see how this goes. Contribute to tekknolagi/carp development by creating an account on GitHub.

    2014 · github.com · its alternatives →

17. 17
    MicroTCP, a minimal TCP/IP stack▲204

    A minimal TCP/IP stack. Contribute to cozis/microtcp development by creating an account on GitHub.

    2023 · github.com · its alternatives →

18. 18
    SIPERB▲10

    Modern Softphone powered by WebRTC for any SIP PBX

    2024 · siperb.com · its alternatives →

19. 19MW
    Multiparty WebRTC video chat▲93

    2013 · opentokrtc.com · its alternatives →

20. 20
    Voiptime Cloud Cold Calling Software▲92

    Close more deals 3 times faster with our predictive dialer

    2019 · voiptimecloud.com · its alternatives →

21. 21WH
    WebRTC helped me to launch my startup after 2 years of waiting.▲42

    Hi All ,I been working on my idea , A Voice CRM solution for 2 years.When I started brainstorming the idea the only option I have to receive phone calls thru browser was a flash widget or use 3rd party providers like Twilio or Phono . Thanks to WebRTC we now integrated our VoIP services to receive and make calls directly thru browser .Please have a look and give us your feedback .Thanks Voz.io Team .

    2013 · voz.io · its alternatives →

22. 22
    VoxCPM2▲110

    Open-source 48kHz TTS with voice design and cloning

    Apr 2026 · github.com · its alternatives →

23. 23
    Mprocs – TUI for controlling multiple processes in one terminal▲14

    Run multiple commands in parallel. Contribute to pvolok/dekit development by creating an account on GitHub.

    2022 · github.com · its alternatives →

24. 24
    Blab▲65

    Voice first communication for teams.

    2020 · blab.to · its 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 →