SumizAI vs Ignis for Obsidian

What Ignis for Obsidian is

Ignis is a Swedish (EU) open-source project (AGPLv3) that provides a browser-compatible implementation of the Electron APIs used by Obsidian — it lets you run Obsidian in a plain browser instead of the desktop app, with the vault (note storage) staying on the server rather than on a local device. An important caveat: Obsidian itself isn't included in or distributed with this project.

The key difference from VNC- or RDP-style (remote desktop) solutions is that Ignis doesn't stream a screen image — it's a genuine web app in which all of Obsidian's logic (including most plugins and themes) runs natively in the browser, thanks to a shim layer translating Electron API calls into their browser equivalents.

The project has grown into a fully usable web client with support for multiple vaults at once, file upload and download, opening workspaces across multiple browser tabs, and live sync between tabs — functionality close to the full desktop Obsidian experience, but accessible from any device with a browser, with nothing to install.

Performance optimizations include an indexer pre-fetch that "warms" the content cache so Obsidian's startup index hits cache instead of waiting on the network, and an LRU cache (50 MB by default) that keeps memory usage bounded regardless of vault size — relevant for large, years-long ai notes archives holding thousands of files.

A Docker container that downloads Obsidian directly from its official source on first run significantly simplifies deployment for IT admins wanting to offer a team access to a shared ai notes vault without installing a desktop app on every individual workstation.

For organizations with security policies banning additional software installs on company computers, Ignis offers a real workaround — access to Obsidian's full functionality through a browser every employee already has installed, with no need for additional admin privileges.

The AGPLv3 license (the same one Macro, mentioned earlier, uses) forces source code to stay available even for modifications run as a network service — an important safeguard against a big company taking the project, hosting it as a closed SaaS service, and giving nothing back to the community developing the open code.

For geographically distributed teams running a shared Obsidian knowledge vault, Ignis removes the need to individually install and configure the desktop app on every computer — one server, one vault, browser access for every team member regardless of their operating system or admin privileges on their own device.

For teachers and students using school-issued Chromebooks, where installing additional software is often administratively blocked, Ignis gives access to a full ai notes system with Obsidian's capabilities — a knowledge graph, plugins, tags — with no permissions needed beyond ordinary web browsing.

It's worth adding that the mere need to supply and configure a server hosting Ignis yourself (Docker, your own infrastructure) means the project is aimed more at IT teams and self-hosting enthusiasts than at an average individual user looking for a ready-made ai notes solution with zero technical setup.

In short, Ignis is a clever, open-source shim that lets Obsidian run as a genuine web app instead of a remote desktop — a great solution for teams and organizations wanting centralized access to a shared these notes system with nothing to install on every individual device.

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's description of Ignis for Obsidian 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.
• Ignis for Obsidian is open source, and SumizAI is not. If reading the source is what decides it for you, that is a real argument for Ignis for Obsidian. 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.
• AlternativeTo's description of Ignis for Obsidian does not mention Markdown, so check what format your notes end up in before you fill it up. SumizAI writes standard .md files to a folder you picked, and an unpaid account can still export all of them.
• Ignis for Obsidian can be self-hosted. SumizAI has nothing to host on the desktop — the vault is a folder on your machine — and if you want the model on your own hardware too, a local Ollama is one of the seven providers it speaks to.
• AlternativeTo lists no mobile version of Ignis for Obsidian. SumizAI runs on macOS, Windows, iOS and Android.
• Both are run from the EU: SumizAI's operator is registered in Poland and the servers are in Germany.

Which one to pick