Software Alternatives & Startups

Obsidian VS Datomic

Compare Obsidian VS Datomic 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
Datomic

The fully transactional, cloud-ready, distributed database

Rating
0 reviews
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 1526 times since March 2021.

social mentions
1,526 vs 0
Note Taking popularity
100% vs 0%
alternatives listed
240+ vs 67

Base details

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

Obsidian
Datomic
Website obsidian.md datomic.com
Pricing
Company Startup from the United States —
Listed in

Features and specs

What each product offers, as listed by its team.

Obsidian 6 features
Datomic 6 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.
  • Immutability
    Datomic employs an append-only data model where data is never overwritten but instead appended, ensuring historical data is always available and providing strong consistency.
  • Time Travel Queries
    Datomic allows you to query the database as of any point in time, facilitating auditing and debugging by allowing easy access to historical data states.
  • Rich Data Model
    Supports complex data types like maps and sets directly within its schema, providing a flexible way to represent data.
  • ACID Transactions
    Datomic supports fully ACID-compliant transactions, ensuring reliable and predictable database operations.
  • Scalability
    Separates storage and compute, allowing for horizontal scaling of read operations, making it suitable for handling large datasets.
  • Query Flexibility
    Offers a powerful query language that supports recursive queries, making it suitable for complex data retrieval needs.

Possible disadvantages

  • Complexity
    The architecture of Datomic can be complex to understand and implement, particularly for teams unfamiliar with its design principles.
  • Cost
    Can be expensive to operate, especially in a cloud environment, where costs increase with the amount of data stored and the compute resources required.
  • Limited Write Throughput
    Due to its append-only design, Datomic can have limited write throughput, which may not be suitable for applications with heavy write requirements.
  • Closed Source
    Datomic is a proprietary database system, which may not appeal to organizations that prefer open-source solutions.
  • Learning Curve
    Requires a learning curve as its conceptual model and query language are different from traditional databases, potentially requiring additional training.
  • Dependency on AWS
    Relying on AWS ecosystem for the storage backend can limit choices for deployment environments, impacting flexibility.

Analysis

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

Obsidian
Datomic

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 Datomic yet.

Videos

Walkthroughs and reviews on video.

Obsidian 1 video + Add
Datomic 3 videos + Add

OBSIDIAN: Getting Started, Facts & Pricing

KotlinConf 2018 - Datomic: The Most Innovative DB You've Never Heard Of by August Lilleaas

More videos

  • - "Real-World Datomic: An Experience Report" by Craig Andera (2013)
  • - Rich Hickey on Datomic Ions, September 12, 2018

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
Datomic
100% 100%
0% 0%
0% 0%
100% 100%
100% 100%
0% 0%
0% 0%
100% 100%

User comments

Share your experience with using Obsidian and Datomic. 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
Datomic no reviews yet

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

Social recommendations and mentions

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

Obsidian 1526 mentions
Datomic 0 mentions
  • 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 / 5 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
  • I Built SelfContext So I Could Stop Re-explaining Myself to AI
    The vault is compatible with Obsidian because the files are just Markdown, YAML frontmatter, and standard relative links. - Source: dev.to / about 1 month ago

View more

Tracking Datomic since Mar 2021.

Alternatives to Obsidian and Datomic

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