AI · alternatives · 2026

24 alternatives to EventCatalog – open-source tool to document event architectures

Model domains, systems, services, APIs, events, schemas, ADRs, and flows as connected architecture documentation for engineers and AI agents.

EventCatalog is an open-source tool designed to help developers document event-driven architectures. It provides a structured way to catalog and organize events, services, and their interactions within distributed… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. EventCatalog – open-source tool to document event architectures launched in 2022; newer entries below may have overtaken it.

1. 1
   Light implementation of Event Sourcing using PostgreSQL as event store▲231

   Hi everyone, If you have a Java Spring Boot application with a PostgreSQL database, you can implement Event Sourcing without introducing new specialized databases or frameworks. If you have an application dealing with an entity called Order, you should adopt Event Sourcing to keep track of all changes, and know how the Order got into the current state. Event Sourcing gives you: 1. the true history of the system (audit and traceability), 2. the ability to put the system in any prior state (debugging), 3. the ability to create read projections from events as needed to respond to new demands.…

   2023 · github.com · its alternatives →

2. 2
   Tables by Google▲783

   Tables helps teams easily track & automate tasks

   2020 · tables.area120.google.com · its alternatives →

3. 3
   EventNative – An open-source, user event collection service▲228

   Jitsu is an open-source Segment alternative. Fully-scriptable data ingestion engine for modern data teams. Set-up a real-time data pipeline in minutes, not days - jitsucom/jitsu

   2020 · github.com · its alternatives →

4. 4
   I built an open source event-management system▲175

   This is a Python/Django based event management system. - iyanuashiri/meethub

   2018 · github.com · its alternatives →

5. 5
   I am building an open-source incident management platform▲168

   I'm building Incidental, an open-source (MIT license) incident management platform. I've been working on it for the past couple of months as a hobby, and now it's at a state where I'm comfortable sharing it. This is also my first open source project. Features: - Custom roles - Custom severities - Integrated with Slack - Web interface Todos: - Custom fields - Custom workflows Website: https://incidental.dev Github: https://github.com/incidentalhq/incidental I'd love to hear your feedback. Thanks!

   2024 · github.com · its alternatives →

6. 6
   I wrote a book on implementing DDD, CQRS and Event Sourcing▲169

   This book explains how to implement DDD, CQRS and Event Sourcing. The concepts are put into practice with standalone examples and a Sample Application.

   2020 · leanpub.com · its alternatives →

7. 7
   Envelope▲635

   First AI agent for event planning

   2025 · envelope.so · its alternatives →

8. 8IT
   Introduction to Event-Driven Architecture▲13

   2021 · medium.com · its alternatives →

9. 9
   Track▲347

   Superhuman for Calendar

   2022 · its alternatives →

10. 10
    Gluecharm App Map & Conceptualization▲82

    Faster business flow design of any event driven application

    2024 · easyspecs.ai · its alternatives →

11. 11
    Agenda Hero Magic Pages▲275

    Turn any set of dates into a page everyone will love

    2025 · agendahero.com · its alternatives →

12. 12
    Event Horizon – CQRS/ES Toolkit for Go▲40

    Event Sourcing for Go! Contribute to looplab/eventhorizon development by creating an account on GitHub.

    2014 · github.com · its alternatives →

13. 13
    PumpkinDB, an event sourcing database engine▲190

    2017 · pumpkindb.org · its alternatives →

14. 14
    Hi.Events – Open-Source Event Management and Ticketing Platform▲86

    Open-source event management and ticket selling platform — perfect for concerts, conferences, and everything in between 🎟️ If you find this project helpful, please consider giving us a star ⭐️ - GitHub - HiEventsDev/Hi.Events: Open-source event management and ticket selling platform — perfect for c

    2024 · github.com · its alternatives →

15. 15
    EventsWallet▲71

    Easy-to-use event platform for virtual and hybrid events

    2021 · eventswallet.com · its alternatives →

16. 16
    EventConnect▲118

    Event CMS for ticketing, payments, website, photos & more

    2023 · eventconnectapp.com · its alternatives →

17. 17
    Eventtus▲74

    Engagement platform for events.

    2016 · its alternatives →

18. 18
    EventQL – Open-source distributed SQL analytics database in C++11▲90

    Distributed "massively parallel" SQL query engine. Contribute to eventql/eventql development by creating an account on GitHub.

    2016 · github.com · its alternatives →

19. 19
    Things to Do API▲57

    Fast, accurate, localized events API for agentic applications: every show, concert, pop-up, market and party as JSON, over REST or MCP. Free to start.

    6d ago · thingstodoapi.com · its alternatives →

20. 20
    EventsWallet▲72

    Range of solutions for on-site, virtual, and hybrid events

    2021 · eventswallet.com · its alternatives →

21. 21
    Events App▲71

    A simple concise app for creating and sharing events.

    2019 · eventsapp.co.uk · its alternatives →

22. 22
    Eventr▲62

    Track your future and past events easily

    2019 · eventrr.herokuapp.com · its alternatives →

23. 23
    Design Events Guide▲65

    A calendar of all UX, motion, design & creativity events

    2023 · designevents.guide · its alternatives →

24. 24BA
    Building an E-Ink Calendar and a UI Toolkit along the way▲64

    2020 · rahulrav.com · 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 →