SumizAI vs Dendron

What Dendron is

What Dendron is

Dendron is an open-source, local Markdown note-taking tool built as a Visual Studio Code extension. An important note up front: active development of the project has stopped — the creators announced this in a GitHub discussion in March 2023. Dendron remains fully functional, though, because it's local and open source: the extension can still be installed from the Visual Studio Marketplace, and existing vaults keep working, just without new features or updates from the creators.

Key features

Dendron offers hierarchical note organization based on a dot-separated naming system (e.g., `project.task.details`), letting you build a tree-shaped knowledge structure directly into file names. On top of that come tagging, backlinks showing which notes reference the current one, a graph view visualizing connections between notes, and split panes for working on several notes at once — features typical of personal-knowledge-management tools, embedded in a familiar code-editor environment.

Development stopped, but the product still works

The March 2023 GitHub discussion confirms the creators stopped actively developing Dendron — so don't expect new features, bug fixes, or team support going forward. But because the project is fully local (notes are plain Markdown files on disk) and open source, existing users can keep using it uninterrupted — the data doesn't disappear, the extension simply stops receiving new releases.

Who it's for

Dendron can still be a reasonable choice for people deeply embedded in the VS Code ecosystem who value naming-based hierarchical note organization and accept the risk of no further support. New users looking for an actively developed tool should probably consider alternatives with a living release cycle instead.

Use cases

In practice, Dendron worked well for building extensive technical documentation with a deep topic hierarchy, where a developer already spends most of the day in VS Code, so switching to a separate notes app added extra friction. Existing users with large, well-organized vaults can keep working without migrating, as long as the Markdown format and file structure stay compatible with their workflow.

Pricing and business model

Dendron is entirely free, under the Apache 2.0 open-source license, with no fees at all — unsurprising, given the project is no longer actively developed or commercially supported.

Limitations and what to watch for

The biggest limitation is precisely the lack of active development — no new features, security fixes, or support for newer VS Code versions are guaranteed. Anyone considering starting fresh with Dendron should know they'd be building their note system on a foundation that won't evolve alongside their needs, unlike actively developed competitors.

AI notes pasted into a hierarchical file structure

Dendron has no built-in AI-model integration, but because every note is a Markdown file within a hierarchical naming structure, pasting an ai notes entry from a conversation with an assistant and placing it in the right spot in the knowledge tree is possible manually — though it requires deciding for yourself where in the hierarchy that particular ai notes entry belongs, since the system doesn't do it automatically.

Alternatives for people who depend on active support

Someone who has already built a large vault in Dendron can reasonably keep using it — local Markdown files don't disappear just because development has stopped. It's worth keeping an eye on community forks or Dendron-inspired extensions, though, in case a need arises for features the original project will never receive.

What's worth checking before choosing

Before building a new note system on Dendron, consider whether the "development stopped" status is acceptable for the coming years, and check whether the extension still works correctly with the current version of Visual Studio Code you're running.

Bottom line

Dendron is a functional but no-longer-developed tool for hierarchical Markdown notes in VS Code. Anyone who wants ai notes from AI conversations to land automatically in an actively developed, searchable archive instead of manually placed files in a stalled project should consider an actively supported tool instead.

Comparison with SumizAI

Dendron and SumizAI differ fundamentally in development status and where content comes from. Dendron is a stalled but still-functional local notebook with no AI integration. SumizAI is actively developed and turns conversations with an AI model into ai notes — answers worth keeping land automatically as Markdown files in a vault the user owns, using their own API key to one of seven providers (Anthropic, OpenAI, Gemini, Groq, OpenRouter, local Ollama, or a self-hosted server), for $1/month after a 7-day trial with no card required. Anyone with an existing large Dendron vault can keep using it; anyone starting from scratch who wants these notes to build up automatically from AI conversations in an actively developed tool will find SumizAI the better-fitting solution.

That is our reading of the record. For AlternativeTo's own wording, see its page for Dendron — the facts above were read on 2026-08-16.

What SumizAI is

A note-taking application built around a conversation with an AI model. You ask a question, the answer streams back, and the answers worth keeping become Markdown notes — filed into a vault that is a folder on your own disk.

A vault is a directory holding base.md, a generated table of contents up to six levels deep, and a notes/ folder with one .md file per note. Before a note is written it is checked against the ones already there, so the fourth note about the same idea gets merged instead of added. Links between notes are ordinary Markdown links to files that exist.

The model is never ours: you bring your own API key to one of seven providers — Anthropic, OpenAI, Gemini, Groq, OpenRouter, a local Ollama or your own server — and pay that provider directly. A question sends the table of contents plus at most five relevant notes within a 24,000-character budget, and the app shows you which five it used.

Every answer kept this way becomes one of these ai notes, ready to search again months later without hunting back through old chats.

Side by side

Where they differ

• AlternativeTo flags Dendron as no longer developed. Whatever you put into it, you will eventually have to get back out — which is an argument for keeping notes in a format that outlives the application, and the reason SumizAI writes plain .md files into a folder you already own.
• AlternativeTo's description of Dendron does not mention an AI model. That is the whole starting point in SumizAI: you have a conversation with a model on your own API key, and the answers worth keeping become notes without you filing them.
• Dendron is open source (Apache-2.0), and SumizAI is not. If reading the source is what decides it for you, that is a real argument for Dendron. The guarantee SumizAI offers instead is structural rather than legal: the notes are Markdown files in a folder you chose, so they open in any editor whether or not the application is running.
• Both keep Markdown, which makes moving between them mostly a matter of copying files. In SumizAI a vault is a directory holding base.md — a generated table of contents — and a notes/ folder with one .md file per note.
• Dendron is described in terms of linking notes together. SumizAI links them too, but deliberately without a syntax of its own: a link is an ordinary Markdown link, [Title](file-name.md), and the model may only point at a file that actually exists. There are no wiki-style [[…]] links to lose on export.
• AlternativeTo lists no mobile version of Dendron. SumizAI runs on macOS, Windows, iOS and Android.

Which one to pick