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Obsidian VS Underlayer

Compare Obsidian VS Underlayer and see what are their differences

Obsidian

A second brain, for you, forever. Obsidian is a powerful knowledge base that works on top of a local folder of plain text Markdown files.

Rating
5.0 · 2 reviews
Alternatives Is it good?
Underlayer

Build courses by API, drop them into your product with one iframe, and get told who finished. No portal, no learner accounts, priced per course view.

Rating
0 reviews
Pricing
Freemium $149 / Monthly
Alternatives Is it good?
Notivo
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. sponsored
Note: These products don't have any matching categories. If you think this is a mistake, please edit the details of one of the products and suggest appropriate categories.

Which is more popular?

Based on our record, Obsidian seems to be more popular. It has been mentioned 1527 times since March 2021.

social mentions
1,527 vs 0
Note Taking popularity
100% vs 0%
alternatives listed
240+ vs 2

Base details

Website, pricing, platforms and company facts side by side.

Obsidian
Underlayer
Website obsidian.md underlayerhq.com
Pricing
Official pricing
Freemium $149 / Monthly Official pricing
Company Startup from the United States Startup from the United Arab Emirates · 1 - 9 employees · 2026
Listed in
Knowledge Management Knowledge Base Markdown Editor Markdown Viewer Personal Notes Note Taking Notes Writing Tools Personal Productivity +6
Education E-learning Education / E-Learning

About Obsidian and Underlayer

In their own words, as submitted to SaaSHub.

Obsidian
Underlayer

No description of Obsidian yet.

Underlayer is headless, API-first training for SaaS products. Instead of sending your users to a separate LMS portal, you generate a course, embed it where they already work, and get every completion sent back to your own systems. How it works Create a course. Generate one from a doc or a prompt...

Read more about Underlayer

Features and specs

What each product offers, as listed by its team.

Obsidian 6 features
Underlayer 0 features
  • 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.

No features have been listed yet.

Analysis

An editorial look at what each product does well and who it suits.

Obsidian
Underlayer

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.

No analysis of Underlayer yet.

Videos

Walkthroughs and reviews on video.

Obsidian 1 video + Add
Underlayer 1 video + Add

OBSIDIAN: Getting Started, Facts & Pricing

Underlayer demo

Category popularity

How often each product is chosen within a category, 0–100% relative to the other.

Score bands 0–20 21–40 41–50 51–60 61–100
Obsidian
Underlayer
100% 100%
Note Taking
0% 0%
0% 0%
Education
100% 100%
100% 100%
Knowledge Management
0% 0%
0% 0%
E-learning
100% 100%

Questions & Answers

As answered by people managing Obsidian and Underlayer.

Who are some of the biggest customers of your product?

Underlayer's answer:

it's pre-launching

What makes your product unique?

Underlayer's answer:

Underlayer is training with no portal. You build a course by API, by MCP, or in the visual builder, and add it to your product with one iframe. Then signed webhooks tell your systems who finished. Learners never create an account or leave your app, and the player uses your theme, so it looks like part of your product. We charge per course view, not per seat, and every price and overage rate is published.

Why should a person choose your product over its competitors?

Underlayer's answer:

Most course tools, like Coassemble, Trainn and LearningStudioAI, assume training happens on their own site: learners sign up, log in and get enrolled, and you pay per seat. Underlayer takes the opposite approach:

No learner accounts. You pass in your own user IDs and we track progress against them. Built for developers. A full REST API covers every resource, and an MCP server lets AI agents create and edit courses. Results in your own tools. Signed webhooks send completions to your CRM, your product or your data warehouse. SCORM 1.2 and 2004 export for customers who still need to load courses into an LMS. Public pricing. Plans start at $149/month for 25,000 course views, with unlimited learners and no sales call required.

How would you describe the primary audience of your product?

Underlayer's answer:

SaaS product, customer success and engineering teams who want onboarding, product education or compliance training inside their own app. It also suits platforms that train other people's users, like partner networks, marketplaces and field-ops tools, where a separate LMS login gets in the way.

What's the story behind your product?

Underlayer's answer:

Every company putting training in front of its users hit the same wall: the LMS wanted to own the learner. That meant a separate portal, a second login and a per-seat bill for people who never opened a course. We built Underlayer as the layer underneath instead. You keep the product and the user relationship. We handle building the course, playing it and tracking progress, and we stay out of the way.

Which are the primary technologies used for building your product?

Underlayer's answer:

Next.js 16 (App Router) with React 19 and TypeScript, Tailwind CSS v4, and Supabase (Postgres with row-level security, Auth and Storage). Claude from Anthropic generates courses with AI. Stripe handles billing and Resend sends email. There is also a remote MCP server with OAuth 2.1 for AI-agent access.

User comments

Share your experience with using Obsidian and Underlayer. For example, how are they different and which one is better?

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Reviews and articles

External articles and on-site reviews we used to compare the two products.

Obsidian 5.0 · 2 reviews
Underlayer no reviews yet

View more

We have no reviews of Underlayer yet. Be the first one to post

Social recommendations and mentions

Recommendations tracked on public social media and blogs since March 2021.

Obsidian 1527 mentions
Underlayer 0 mentions
  • Take Your AI's Questions Out of the Terminal
    This is a decision page. Claude Code wrote it after reading a project's notes, and it shows the detail a chat question leaves out. I answer it in Obsidian. - Source: dev.to / 2 days ago
  • How can software developers stay motivated at work?
    For note-taking, I recommend Obsidian. It's lightweight, has a large community, and offers plenty of useful plugins. I use the Timekeep plugin myself, which helps me connect tasks with the time spent on them. - Source: dev.to / 9 days ago
  • Hermes Agent Use Cases: 5 Free Things You Can Set Up Today (2026)
    The setup that makes the output noticeably sharper is a memory layer. Connecting a plain-text notes app like Obsidian (free for personal use) gives the agent durable context: what your project is about, who it is for, and what you have... - Source: dev.to / about 2 months ago

View more

Tracking Underlayer since Sep 2026.

Alternatives to Obsidian and Underlayer

When comparing Obsidian and Underlayer, you can also consider the following products.

  • Notion

    All-in-one workspace. One tool for your whole team. Write, plan, and get organized.

    Compare Notion to Obsidian or Underlayer:

    Notion vs Obsidian Notion vs Underlayer
  • Coassemble

    Coassemble is an all-in-one, online training tool that connects people with the information they need – anytime, anyplace.

    Compare Coassemble to Obsidian or Underlayer:

    Coassemble vs Obsidian Coassemble vs Underlayer
  • Logseq

    Logseq is a local-first, non-linear, outliner notebook for organizing and sharing your personal knowledge base.

    Compare Logseq to Obsidian or Underlayer:

    Logseq vs Obsidian Logseq vs Underlayer
  • Trainn.co

    Trainn is a Customer Education platform for SaaS companies of all sizes to onboard and train customers, at scale, using product training & how-to videos, feature walkthroughs, and a dedicated customer training Academy.

    Compare Trainn.co to Obsidian or Underlayer:

    Trainn.co vs Obsidian Trainn.co vs Underlayer
  • Joplin

    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.

    Compare Joplin to Obsidian or Underlayer:

    Joplin vs Obsidian Joplin vs Underlayer
  • Evernote

    Bring your life's work together in one digital workspace. Evernote is the place to collect inspirational ideas, write meaningful words, and move your important projects forward.

    Compare Evernote to Obsidian or Underlayer:

    Evernote vs Obsidian Evernote vs Underlayer
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