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Dev tools · alternatives · 2026

24 alternatives to Gmax CRM Open Source

Gmax CRM is an open source invoicing software

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Gmax CRM Open Source launched in 2022; newer entries below may have overtaken it.

  1. 1IM
  2. 2

    Uncomplicated, effortless, Trello-style CRM in your Gmail

    2018 · sortd.com · its alternatives →

  3. 3

    Invoicing tool For Small Businesses & Freelancers

    2021 · its alternatives →

  4. 4

    A simple, free CRM that syncs with Gmail.

    2018 · its alternatives →

  5. 5
    Twenty▲989

    Build your Enterprise CRM with an AI-friendly SDK

    2025 · twenty.com · its alternatives →

  6. 6

    Write private notes with a lightweight CRM for Gmail

    2022 · workspace.google.com · its alternatives →

  7. 7

    Turn Gmail into a smart CRM

    2016 · nethunt.com · its alternatives →

  8. 8
    ClearCRM▲366

    Comprehensive CRM Suite with built-in automation builder

    2025 · its alternatives →

  9. 9

    The personal CRM for Gmail

    2017 · followup.cc · its alternatives →

  10. 10

    The Simple CRM for Google Sheets

    2016 · its alternatives →

  11. 11

    Mail merge, auto follow ups, CRM inside your Gmail

    2021 · trypigeon.co · its alternatives →

  12. 12

    Open source business application platform for fast development - openkoda/openkoda

    2024 · github.com · its alternatives →

  13. 13
    Streak▲363

    CRM in your inbox - for Gmail

    2014 · streak.com · its alternatives →

  14. 14
    EspoCRM▲99

    Open-source CRM software that drives your sales

    2020 · espocrm.com · its alternatives →

  15. 15EE

    Manage sales and customer relationships directly inside Gmail. Streak is the CRM your team will actually use—integrated, smart, and loved by 750,000+ users.

    2013 · streak.com · its alternatives →

  16. 16

    The open-source CRM toolkit for personalized solutions

    2024 · marmelab.com · its alternatives →

  17. 17
    Hexospark▲204

    Email automation + CRM designed to spark conversations

    2022 · hexospark.com · its alternatives →

  18. 18OS

    Hi HN! We’re Aleem, Chris, Borys, Meichen and Zach from Streak (YC S11) and today we’re open sourcing our InboxSDK https://www.inboxsdk.com, which makes it easy to build apps for Gmail. Over 1.8B users spend their days in Gmail! Having your app built into the Gmail workflow is a better user experience and gives you great user retention. InboxSDK gives you a high-level, declarative API to insert your UI into Gmail without having to directly manipulate the DOM yourself. End users install a browser extension to use your app. The SDK can add UI to multiple areas of Gmail. For example,…

    2022 · its alternatives →

  19. 19

    The scalable toolkit for small businesses

    2021 · crankcrm.com · its alternatives →

  20. 20

    An easy CRM in your inbox

    2019 · chromewebstore.google.com · its alternatives →

  21. 21

    Free accounting software for small businesses & freelancers

    2022 · akaunting.com · its alternatives →

  22. 22
    NetHunt▲69

    Built-in-Gmail CRM for sales teams and small businesses

    2019 · nethunt.com · its alternatives →

  23. 23MC

    Hello Community! My name is Charles-Eugene Loubao, I am a software developer who recently turned into an Indie Maker and I am sharing my new product with you today. Micro CRM is a Customer Relationship Managment web app built to be easy to use and intuitive. Most CRMs can be complicated to use and come with an expensive price tag. Micro CRM is built to fill that need for a much simpler and cheaper contact managment platform that offers compeling features without being overwhelming. What can I do with it ? - Keep all your contacts in one place - Timestamped notes can be used to keep track of…

    2019 · its alternatives →

  24. 24

    The #1 CRM for customers who love Google.

    2018 · copper.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 →