Work · alternatives · 2026

24 alternatives to OPUS

Open source knowledge base application for Teams

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. OPUS launched in 2018; newer entries below may have overtaken it.

1. 1
   Slab▲747

   Modern knowledge base & wiki for teams

   2018 · slab.com · its alternatives →

2. 2
   Collabwriting for Teams▲689

   The easiest way to capture, store & find knowledge

   2024 · its alternatives →

3. 3
   You Need A Wiki▲579

   Create a wiki with Google Docs

   2019 · youneedawiki.com · its alternatives →

4. 4
   Notion 1.0 Web + Mac App▲1,015

   Docs, wikis, tasks – a minimal & unified workspace for teams

   2016 · notion.so · its alternatives →

5. 5
   Spot▲226

   The knowledge base that scales with your team

   2021 · its alternatives →

6. 6
   Slab 2.0▲194

   The knowledge base that democratizes knowledge

   2020 · slab.com · its alternatives →

7. 7
   Capiche▲401

   Honest discussions about work tools.

   2019 · vendr.com · its alternatives →

8. 8
   Feature Rich Wiki for Microsoft Teams▲78

   One place to store, manage and update your team’s SOPs, manuals and FAQs — with AI answers right inside Microsoft Teams, SharePoint, and Copilot.

   2020 · perfectwiki.xyz · its alternatives →

9. 9
   Nuclino▲240

   Part knowledge base, part collaboration space 🧠

   2016 · nuclino.com · its alternatives →

10. 10
    Your team’s knowledge base▲9

    Team wiki, documentation, meeting notes, playbooks...

    2019 · getoutline.com · its alternatives →

11. 11
    Stack Overflow for Teams▲501

    Everything you love about Stack Overflow in a private space.

    2018 · stackoverflow.com · its alternatives →

12. 12
    Perfect Wiki▲68

    Feature rich Wiki for Microsoft Teams

    2020 · perfectwikiforteams.com · its alternatives →

13. 13
    Tactiq Spaces▲379

    Build your team's knowledge base from meeting transcripts

    2024 · tactiq.io · its alternatives →

14. 14
    Bold▲463

    An internal blog for your team's knowledge and big ideas.

    2016 · bold.co · its alternatives →

15. 15
    Outro▲116

    A new take on retrospectives for progressive teams

    2019 · outro.co · its alternatives →

16. 16
    Metabase Cloud▲237

    Fast, easy open source dashboards for everyone

    2020 · metabase.com · its alternatives →

17. 17
    Type.com▲120

    A shared workspace for Claude, Codex, and your team

    Sep 2026 · type.com · its alternatives →

18. 18
    Metabase▲313

    Open source business intelligence - Installs in 5 minutes

    2015 · metabase.com · its alternatives →

19. 19
    Toby for Teams▲304

    Better bookmarks, now with collaboration baked in 🔖

    2017 · gettoby.com · its alternatives →

20. 20
    Turn any website into a knowledge base for LLMs▲305

    I built this tool because I wanted a way to just take a bunch of URLs or domains, and query their content in RAG applications. It takes away the pain of crawling, extracting content, chunking, vectorizing, and updating periodically. I'm curious to see if it can be useful to others. I meant to launch this six months ago but life got in the way...

    2024 · embedding.io · its alternatives →

21. 21
    Zulip 4.0▲121

    Open source team chat with powerful threading

    2021 · zulip.com · its alternatives →

22. 22
    Personal Knowledge Hub▲110

    A Notion template for staying organized and inspired

    2023 · samstoof.gumroad.com · its alternatives →

23. 23
    Metabase, an open-source business intelligence tool▲287

    Metabase grounds every answer in your semantic layer — your metrics and business logic — so you can inspect the query behind it.

    2015 · metabase.com · its alternatives →

24. 24
    Teamhub.com▲237

    Hey HN, We've just launched our team collaboration platform where we're bringing together all the important tools under one app. We've been frustrated in the past with tools which had a huge disconnect between projects and chat. It always inevitably leads to teams using external chat apps for "project management" and then abandoning the main tools altogether. We're creating tools we hope teams will stick with. Super integrated Chat. Convert comments to tasks and have them auto added to project boards. Automations to help massively reduce burden on the team. Workflows, Time-Off and so much…

    2024 · teamhub.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 →