Alternatives

Products that do what Hollow is an open-sourced self-modifying agentic system does

1. 1VO
   Vault on AWS – A Terraform Project for Secrets Management Anywhere▲21

   2020 · github.com

2. 2DH
   Deep Hollow – A survival game where your AI runs your fortress 24/7▲5

   Mar 2026 · mrphilgames.com

3. 3PG
   Procedurally Generated Artificial Life▲6

   2020 · kirkas.com

4. 4ST
   Slacky, the first open-source Slack selfbot in Python▲10

   2020 · github.com

5. 5AO
   Agent Office – Slack for (OpenClaw Like) AI Agents▲5

   Mar 2026 · github.com

6. 6
   Voidleap Code▲11

   Coding environment and harness. BYOK. Build better.

   16d ago · voidleap.com

7. 7WB
   Workflowy but Open Source▲7

   Think Workflowy meets OSS with the plugin extensibility of Obsidian and beauty of Linear

   Jul 2026 · twitter.com

8. 8NO
   Nimbalyst open source Obsidian, Codex app, and Linear for coding agents▲7

   Hi, I'm Karl. Greg and I spent the last year building Nimbalyst, an open-source local desktop workspace for working with coding agents. We want to give agents and humans one place to work together with maximum bandwidth and context, instead of Obsidian for plans, Excalidraw for diagrams, Codex app or Conductor for session management, and Linear for tasks. So we integrated: - Visual editors for markdown, diagrams, mockups, data models, CSV, code, and your own custom extensions - Red/green diff review with per-block accept/reject when an agent makes changes - Session manager with…

   May 2026 · github.com

9. 9LA
   LastSignal – A self-hosted, zero-knowledge dead man's switch▲5

   Jan 2026 · lastsignal.app

10. 10BA
    Built an Obsidian plugin that rephrases your writing without takin over▲5

    Writing is hard, and it's tempting to just let AI do the whole thing So I built an Obsidian plugin that keeps AI in its place Highlight a sentence, get some options, pick the one you like Sharpens your writing instead of automating it

    Jun 2026 · rephrasethis.co

11. 11AP
    Agent Protocol▲6

    2023 · github.com

12. 12AA
    Agex – An agent framework that lives in your Python runtime▲5

    2025 · ashenfad.github.io

13. 13OS
    Open-source framework to build, manage and run Autonomous Agents▲6

    2023 · github.com

14. 14CS
    Containarium – self-hosted sandbox for AI agents, MCP-native▲5

    May 2026 · github.com

15. 15BL
    Bubble Lab – Code-based agentic workflow platform (open-source)▲6

    Nov 2025 · github.com

16. 16WA
    Wozz – Agentless Kubernetes cost auditor (open source)▲5

    Nov 2025 · github.com

17. 17TT
    The Three Idempotencies of an Agent▲5

    Jun 2026 · agentsxbackend.substack.com

18. 18JS
    Julius Slack Agent (and how to build your own)▲5

    Oct 2025 · julius.ai

19. 19AS
    Autonomy – Self-Harness/Self-Directed AI Agent Core Under Development▲5

    Jun 2026 · autonomy-landing-page.vercel.app

20. 20JL
    James Library – Local multi-agent research lab (built on ZeroClaw)▲5

    I’ve been working on a multi-agent academic research lab, and I wanted to share it here today primarily to give a massive shoutout to the developers behind ZeroClaw. When designing the architecture for this, I needed an autonomous agent runtime that was lightweight, entirely agnostic, and highly secure for local execution. ZeroClaw’s pure Rust implementation provided exactly the zero-overhead foundation the project required. Because they solved the core runtime execution so elegantly, I was able to spend my time building the higher-level orchestration on top of it—like the retrieval graph…

    Mar 2026 · rainlabteam.vercel.app

21. 21TA
    Tessera – an AI agent that refuses to answer without evidence▲5

    Jul 2026 · github.com

22. 22
    Spline V2

    Best 3D platform for the agentic era Discussion | Link

    10d ago · producthunt.com

23. 23
    OpenClaw 2.0

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    6d ago · producthunt.com

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