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Dev tools · alternatives · 2026

24 alternatives to ASTPP

Open source voip billing solution

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.

  1. 1

    Open source billing UI components

    2025 · billingsdk.com · its alternatives →

  2. 2
    Lotus▲520

    Open-source pricing & billing

    2023 · its alternatives →

  3. 3

    All-in-one billing and payments solution

    2024 · its alternatives →

  4. 4
    QuickBill▲164

    A simple tool to create unlimited free invoices.

    2017 · its alternatives →

  5. 5

    Connect. Earn. Expand

    Sep 2025 · centipidbilling.com · its alternatives →

  6. 6
    Voquill▲188

    The open source WisprFlow alternative

    Jan 2026 · voquill.com · its alternatives →

  7. 7
    Killbill▲156

    Open source subscription billing & payment platform

    2014 · its alternatives →

  8. 8

    Advanced VoIP billing solution with invoicing

    2024 · its alternatives →

  9. 9
    Anchor▲89

    Free, self-hosted invoicing software

    2014 · its alternatives →

  10. 10PS

    Welcome to Project S.A.T.U.R.D.A.Y. This is a project that allows anyone to easily build their own self-hosted J.A.R.V.I.S-like voice assistant. In my mind vocal computing is the future of human-computer interaction and by open sourcing this code I hope to expedite us on that path. I have had a blast working on this so far and I'm excited to continue to build with it. It uses whisper.cpp [1], Coqui TTS [2] and OpenAI [3] to do speech-to-text, text-to-text and text-to-speech inference all 100% locally (except for text-to-text). In the future I plan to swap out OpenAI for llama.cpp [4]. It is…

    2023 · github.com · its alternatives →

  11. 11
    Revloop▲60

    A simple way to handle your subscription and billing needs

    2022 · its alternatives →

  12. 12WP

    This project is a Windows port of the whisper.cpp implementation: https://github.com/ggerganov/whisper.cpp Which in turn is a C++ port of OpenAI's Whisper automatic speech recognition (ASR) model: https://github.com/openai/whisper The implementation has no dependencies, usually much faster than realtime, and should hopefully work on most Windows computers in the world.

    2023 · github.com · its alternatives →

  13. 13

    Open source billing, payment & invoicing platform

    Nov 2025 · definvoice.xyz · its alternatives →

  14. 14IP
  15. 15

    Isp billing and customer relationship management system

    2025 · its alternatives →

  16. 16

    Open-source invoicing you actually own

    28d ago · inkvoice.app · its alternatives →

  17. 17

    Transform your business VoIP Custom Functionality

    2025 · its alternatives →

  18. 18

    The Most Advanced VOIP Solution on the Web.

    2024 · its alternatives →

  19. 19

    Create invoices & get paid faster , Smart invoicing

    2025 · its alternatives →

  20. 20

    Free & Open-Source Invoice Generator

    Apr 2026 · easyinvoicepdf.com · its alternatives →

  21. 21

    Free AI invoice & quote generator with 1-click conversion

    Feb 2026 · invoicey.io · its alternatives →

  22. 22

    Free Invoice Generator Indian Freelancers & Small Businesses

    Nov 2025 · invoicebill.org · its alternatives →

  23. 23

    For your seamless Business calls

    2021 · its alternatives →

  24. 24
    ISPBox▲13

    Manage Your ISP Smarter

    2025 · 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 →