Dev tools · alternatives · 2026

24 alternatives to Universal Recommender

Open source recommendation engine on Spark + Elasticsearch

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Universal Recommender launched in 2015; newer entries below may have overtaken it.

1. 1AD
   A distributed Recommendation Engine based on Redis + Ruby (and C)▲97

   2012 · github.com · its alternatives →

2. 2
   Audiosear.ch 2.0▲131

   One-stop search and recommendation engine for podcasts

   2017 · its alternatives →

3. 3PR
   Product-Recommender – Recommendation Engine for Node.js▲15

   2014 · npmjs.org · its alternatives →

4. 4OS
   Open-source search engine with 2bn-page index▲229

   2016 · deusu.org · its alternatives →

5. 5WM
   We made an open-source personalization engine▲284

   Hey, HN! You probably know that the ordering of products on Amazon, posts in FB, and search results in Google is personalized for each visitor, as it directly affects conversion, click rate and engagement. But not everyone can afford to hire an army of PhDs to squeeze every penny out of the ranking, and not everyone agrees on the current (im)balance between privacy and profits. So we built Metarank, an open-source and privacy-focused personalization engine. It can rerank in real-time any type of content, using only the data you allow, and optimize metrics you define. We made a lot of…

   2022 · github.com · its alternatives →

6. 6
   IntelliButler▲90

   Contextual machine learning content recommender & scheduler

   2014 · its alternatives →

7. 7BA
   Building a JavaScript Recommendation Engine with Graph Theory▲40

   2015 · medium.com · its alternatives →

8. 8DA
   Dejavu – a modern, open-source data browser for Elasticsearch▲33

   2016 · appbaseio.github.io · its alternatives →

9. 9GW
   goodbre.ws, a fully open source recommendation engine for beer▲57

   2012 · goodbre.ws · its alternatives →

10. 10
    MaestroIQ▲79

    1st Recommendation Engine for Customer Experience Management

    2015 · its alternatives →

11. 11RA
    Recommendarr – AI Driven Recommendations Based on Sonarr/Radarr Media▲88

    Hello HN! I've built a web app that helps you discover new shows and movies you'll actually enjoy by: - Connecting to your Sonarr/Radarr/Plex instances to understand your media library - Leveraging your Plex watch history for personalized recommendations - Using the LLM of your choice to generate intelligent suggestions - Simple setup: Easy integration with your existing media stack - Flexible AI options: Works with OpenAI-compatible APIs like OpenRouter, or run locally via LM Studio, Ollama, etc. - Personalized recommendations: Based on what you actually watch. While it's still a…

    2025 · github.com · its alternatives →

12. 12SE
    Supergiant Elasticsearch – Auto-Scalable and Automated ES DevOps▲22

    2016 · qbox.io · its alternatives →

13. 13
    Versus▲2

    Ultimate recommendation engine

    2015 · its alternatives →

14. 14GF
    GUI for Data Modeling with Elasticsearch▲74

    2016 · github.com · its alternatives →

15. 15SR
    Simple Recommendation Engine with Apache Mahout and Postgres▲6

    2017 · github.com · its alternatives →

16. 16
    Guesswork▲97

    Product recommendation engine for first time buyers

    2014 · its alternatives →

17. 17
    searx▲82

    A privacy-respecting, hackable metasearch engine

    2016 · its alternatives →

18. 18
    Limk▲66

    Smarter Content Recommendations.

    2014 · its alternatives →

19. 19D1
    Dejavu 1.0 – An open-source data browser for Elasticsearch▲9

    2017 · github.com · its alternatives →

20. 20TI
    TF-IDF search engine in 30 lines of Scala▲43

    2011 · github.com · its alternatives →

21. 21
    Mirage▲8

    An interactive query explorer for Elasticsearch

    2016 · its alternatives →

22. 22
    Elasticsearch▲5

    Open Source Distributed RESTful Search Engine

    2016 · its alternatives →

23. 23MO
    Metarank – open-source hybrid search with LLMs▲7

    A small demo for a Metarank open-source project I'm maintaining.

    2023 · demo.metarank.ai · its alternatives →

24. 24AY
    athena – yet another (but better) minimal static blog generator▲33

    2017 · github.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 →