--- title: "SumizAI vs Lithic PKMS" url: "https://sumizai.com/alternative-to/sumizai-alternative-to-lithic-pkms.html" date: "2026-08-14T00:00:00+02:00" modified: "2026-08-14T00:00:00+02:00" description: "Looking for a Lithic PKMS alternative? SumizAI and Lithic PKMS side by side: price, licence, platforms and what each one actually does." tags: ["ai notes", "sumizai", "lithic-pkms", "alternative to Lithic PKMS"] --- # SumizAI vs Lithic PKMS Looking for a Lithic PKMS alternative? SumizAI and Lithic PKMS side by side: price, licence, platforms and what each one actually does. ## What Lithic PKMS is Lithic is a bespoke Personal Knowledge Management System (PKMS) built on the powerful TiddlyWiki engine, re-engineered for a modern academic and engineering workflow. It bridges the gap between the database flexibility of TiddlyWiki and the rapid, outlining experience of Logseq. The application is fully open source under the MIT license, available as an online service and for self-hosting. Key features and functionality: Being built on the TiddlyWiki engine, a mature and flexible tool for building personal wikis, gives Lithic solid database foundations on top of which a more modern, contemporary-tuned user experience has been built. Combining TiddlyWiki's database flexibility with the fast, outlining work style known from Logseq means Lithic tries to reconcile two different approaches to knowledge management - a structural one, based on linked "tiddlers," and a fast, linear note-taking style typical of outlining tools. Being tuned for academic and engineering workflows suggests Lithic offers features especially useful to researchers and engineers - likely support for citations, mathematical formulas, or technical documentation. Its open-source nature under the MIT license, along with a self-hosting option, gives users full control over the code and data, unlike closed, cloud-based alternatives. Who it's for: Lithic is aimed primarily at academic researchers and engineers looking for a knowledge management system tuned specifically to their professional workflow, instead of a universal note-taking tool. People already using TiddlyWiki but looking for a more modern, outlining experience known from Logseq find in Lithic a combination of both approaches. Open-source software enthusiasts, who value being able to review the code and self-host their own instance, choose Lithic for its open-source nature under the MIT license. PhD candidates and researchers running complex, multi-year research projects use Lithic's database flexibility to build an extensive, interconnected network of research notes. Use cases: A PhD candidate conducting research over several years uses Lithic to build an extensive network of related notes, citations, and conclusions, using TiddlyWiki's database flexibility to organize complex material. An engineer documenting a technical project uses Lithic's fast, outlining note-taking style to keep a log of design decisions alongside code work. Someone migrating from TiddlyWiki but looking for a faster way to take notes tests Lithic as a combination of the engine they already know with a newer, smoother experience. A research team deciding to self-host Lithic on its own server gains full control over its research project's data. Pricing and business model: Lithic is entirely free and open source under the MIT license, with no licensing fees for downloading and using the application. This model, typical of open-source projects, lets the academic and engineering community freely use the tool and contribute to its development, without the commercial pressure typical of paid knowledge management systems. Comparison with SumizAI: Lithic and SumizAI operate in different areas of digital knowledge work. Lithic is a specialized personal knowledge management system tuned for academic and engineering workflows, with no integration with artificial intelligence. SumizAI, by contrast, is a platform enabling conversations with multiple AI providers at once, unrelated to building an interconnected base of research notes. A researcher building their knowledge network in Lithic might additionally use SumizAI when they need AI help analyzing literature or generating research hypotheses before adding them to their Lithic base. AI notes in an academic knowledge system: Researchers using Lithic often add ai notes from consultations with language models as further "tiddlers" in their knowledge base, linked to the relevant citations, research notes, and conclusions. TiddlyWiki's database flexibility means such ai notes can be linked multiple times to different areas of research, building a dense network of mutual references unavailable in simpler, linear notepads. Lithic's open-source nature also lets technically advanced researchers adapt how ai notes are stored and displayed to the specific requirements of their academic field. The self-hosting option means an entire base of research these notes can stay entirely within a university's or institute's own infrastructure, with no dependency on an external cloud. **Key facts** - Price: Free - License: Open Source - Category: Note-taking ## 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. ## Where they differ - AlternativeTo's description of Lithic PKMS 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. - Lithic PKMS is open source (MIT), and SumizAI is not. If reading the source is what decides it for you, that is a real argument for Lithic PKMS. 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 Lithic PKMS 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. - Lithic PKMS 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. - Lithic PKMS runs in the browser. SumizAI is a desktop and mobile application, and on the desktop the vault is a folder on your own disk rather than a document in someone's cloud. Full side-by-side comparison table and pricing: [https://sumizai.com/alternative-to/sumizai-alternative-to-lithic-pkms.html](https://sumizai.com/alternative-to/sumizai-alternative-to-lithic-pkms.html)