Notivo is a private, per-person notebook for managers. Capture feedback, commitments, and 1:1 context as it happens — from web, iOS, WhatsApp, email, ChatGPT, or Claude — then get it back later, organized by person.
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Which is more popular?
Based on our record, Obsidian
seems to be a lot more popular than HumanLayer.
While we know about 1532 links to Obsidian,
we've tracked only 2 mentions of HumanLayer.
social mentions
1,532 vs 2
Note Taking popularity
100% vs 0%
alternatives listed
240+ vs 69
Base details
Website, pricing, platforms and company facts side by side.
Local-first Obsidian stores your notes locally on your device, giving you full control over your data and enhancing privacy.
Markdown Support Obsidian uses Markdown, making it easy to format text and compatible with many other text editors and tools.
Bidirectional Linking You can create bidirectional links between notes, which helps in building a knowledge graph and navigating related information more easily.
Customizability Obsidian is highly customizable with community plugins, themes, and various settings to fit different workflows.
Graph View Provides a visual graph view of your notes and their connections, aiding in understanding relationships and discovering insights.
Offline Access Since the notes are stored locally, you can access and edit them without an internet connection.
Possible disadvantages
Learning Curve Obsidian can be complex and overwhelming for beginners due to its extensive features and customizable nature.
Sync Limitations While local-first is great for privacy, it requires additional steps or third-party solutions for syncing across devices.
No True Real-time Collaboration Obsidian lacks native real-time collaboration features, making it less suitable for collaborative work compared to cloud-based solutions.
Limited Mobile Features The mobile version of Obsidian, while functional, is not as robust as the desktop application, potentially hindering productivity on the go.
Dependence on Plugins Many advanced features require the use of third-party plugins, which could lead to compatibility issues and reliance on community support.
Performance on Large Vaults Performance might degrade with a very large number of notes or complex graphs, impacting usability.
Human-in-the-loop for AI agents HumanLayer provides a structured framework for incorporating human oversight and approval into AI agent workflows, ensuring that critical or sensitive actions are reviewed by a human before execution. This reduces the risk of AI making costly or irreversible mistakes.
Easy integration with existing agent frameworks HumanLayer is designed to work with popular AI agent frameworks like LangChain, CrewAI, and others, making it relatively straightforward to add human approval gates to existing agent pipelines without major architectural changes.
Multi-channel contact support HumanLayer supports human approvals through multiple channels such as Slack and email, allowing teams to integrate approval workflows into communication tools they already use, reducing friction in the review process.
Granular control over approval workflows Developers can define specific function calls or actions that require human approval, allowing fine-grained control over which agent actions need oversight and which can proceed autonomously. This enables a balanced approach between automation and human control.
Open source core HumanLayer offers an open-source SDK, making it accessible for developers to inspect the code, contribute improvements, and customize the tool for their specific needs without vendor lock-in concerns.
Possible disadvantages
Added latency to agent workflows Requiring human approval introduces delays into AI agent pipelines, as the workflow must pause and wait for a human to review and respond. This can significantly slow down time-sensitive processes or reduce the efficiency gains that agents are meant to provide.
Relatively early-stage project HumanLayer is a relatively new and emerging tool in the AI agent ecosystem. This means the documentation, community support, and feature set may not be as mature or comprehensive as more established tools, and the API may undergo breaking changes.
Scalability challenges with human bottlenecks As AI agent usage scales up, the human approval step can become a bottleneck. If many agents or many actions require approval simultaneously, it can overwhelm human reviewers and create queues that defeat the purpose of automation.
Limited ecosystem and integrations While HumanLayer supports some popular agent frameworks and communication channels, the range of supported integrations is still growing. Teams using less common frameworks or communication tools may need to build custom integrations.
Dependency on external services for notifications Relying on Slack, email, or other external channels for approval notifications introduces dependencies on third-party services. If those services experience outages or message delivery delays, agent workflows can stall without clear fallback mechanisms.
Analysis
An editorial look at what each product does well and who it suits.
Obsidian
HL
HumanLayer
Overall verdict
Overall, Obsidian.md is an excellent tool for users looking for a versatile and powerful note-taking application. Its unique features such as backlinking, markdown support, and robust customization options make it a favorite among knowledge management enthusiasts.
Why this product is good
Obsidian.md is considered good by many users because it is a powerful knowledge management and note-taking application that leverages Markdown for document formatting. It allows for bi-directional linking between notes, which helps in creating a network of interconnected ideas, often described as a 'second brain.' Its ability to support plugins, themes, and robust graph visualization also adds to its appeal. Additionally, it stores notes locally, ensuring privacy and data ownership, while being cross-platform compatible across Windows, macOS, and Linux.
Recommended for
Knowledge workers who need a powerful tool to organize and connect their thoughts.
Students who are looking to create a structured and visually interconnected note system.
Writers and researchers who benefit from linking related ideas and maintaining detailed notes.
Tech-savvy users or developers who appreciate the local storage and open ecosystem for plugins and customization.
Overall verdict
HumanLayer is a solid tool for teams building AI agents that need human oversight, offering a straightforward way to add human-in-the-loop approvals and interactions to autonomous workflows.
Why this product is good
Provides a purpose-built API and SDK for adding human approval steps to AI agent actions, reducing the risk of unsupervised automation.
Integrates with popular frameworks like LangChain, CrewAI, and custom agent setups, making it flexible for different tech stacks.
Supports multiple communication channels such as Slack, email, and web for routing approval requests to the right humans.
Enables safer deployment of AI agents that perform high-stakes or irreversible operations by keeping a human in the loop.
Developer-friendly with clear documentation and quick setup for common use cases.
Recommended for
Developers and teams building autonomous AI agents that require human approval for sensitive actions
Companies deploying LLM-powered automation in high-stakes domains like finance, healthcare, or operations
Startups experimenting with agentic workflows who want to add guardrails without building oversight infrastructure from scratch
Engineering teams using frameworks like LangChain or CrewAI that need human-in-the-loop capabilities
One thing to note: Notion bills itself as an Evernote competitor for personal users. It can be—but it's too much for most people, and its offline functionality isn't the best. If you love the idea of Notion, go right...
This app is the kind of thing that, if you’re into it, will have you exploring its various ins, outs, and add-ons for days and weeks on end. Obsidian uses the Markdown format for its notes (which means they can be...
However, it's important to note that Obsidian's whiteboard functionality is not as robust as dedicated collaboration tools. While it lacks real-time basic collaboration features, Obsidian compensates with its vibrant...
The reasons live somewhere else: in practice notes in an Obsidian vault, one note per convention, with the repos it has held in. A note starts as an idea, moves to trialing, and only becomes enforced once I've applied it again in a few...
- Source: dev.to
/
2 days ago
It's the team version of the second brain you build with Obsidian and Claude.
- Source: dev.to
/
6 days ago
Mine and yours first Obsidian plugin
The first time I downloaded Obsidian was about two years ago and I really liked the concept of storing everything locally in simple markdown files without unnecessary clutter.
- Source: dev.to
/
5 days ago
Research Plan Implement — The Anti-Vibe-Coding Workflow
Dex Horthy, CEO of HumanLayer, put a name to the pattern in his AI Engineer conference talk "No Vibes Allowed" (AI Engineer World's Fair, 2024). The Research → Plan → Implement (RPI) framework is a structured workflow for AI-assisted...
- Source: dev.to
/
8 months ago
I realized I needed to change my approach. While I love the iterative learning process, I needed a way to give the agent a better foundation so our pair programming sessions actually made progress. I decided to try the RPI method...
- Source: dev.to
/
9 months ago
Alternatives to Obsidian and HumanLayer
When comparing Obsidian and HumanLayer, you can also consider the following products.
Joplin is a free, open source note taking and to-do application, which can handle a large number of notes organised into notebooks. The notes are searchable, tagged and modified either from the applications directly or from your own text editor.
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