SumizAI vs CheckForFacts

What CheckForFacts is

CheckForFacts identifies claims in your text, rates their credibility, and provides detailed explanations with links to reliable sources. The tool is designed for anyone needing accurate, evidence-backed content, including journalists, students, and researchers. The application comes from Germany, within the European Union, and runs as an online SaaS service under a freemium model.

Key features and functionality

Automatic identification of claims in text is CheckForFacts's core mechanism - the tool analyzes entered text and extracts specific, verifiable statements from it, instead of leaving the user to manually search for fragments needing a check. Rating the credibility of each identified claim gives the user quick information about which text fragments need special attention or further verification before publication or use in academic work. Detailed explanations accompanying each rating let the user understand why a given claim was rated credible or questionable, instead of leaving them with just an unexplained numerical score. Links to reliable sources allow direct access to material confirming or challenging a given claim, eliminating the need for separate research to verify it.

Who it's for

CheckForFacts is aimed primarily at journalists who need to verify the accuracy of facts in an article before publication. Students writing academic papers use the tool to check whether claims in their text are backed by credible sources before submitting the work for grading. Researchers preparing academic publications use CheckForFacts as an additional verification layer before submitting text for peer review. Content creators who care about the credibility of published material use the tool as part of their editorial process, minimizing the risk of spreading false information.

Use cases

Before publishing an article, a journalist runs the text through CheckForFacts, checking whether all cited facts and statistics are backed by credible sources before the text goes to print or online publication. A student writing a bachelor's thesis uses the tool to verify claims made in the introduction and literature review, making sure their argument rests on solid foundations. A researcher preparing an article for a scientific journal checks in CheckForFacts whether the statistical data cited in the text remains current and correctly interpreted. An editor working on a publication containing many numerical claims uses the tool to systematically verify each one before finally approving the text for print.

Pricing and business model

CheckForFacts runs on a freemium model, offering free access with a limited number of verifiable texts and a paid subscription unlocking higher limits and the tool's full functionality. This model lets individual users - students or freelancers - test the value of fact verification before deciding on a paid subscription, while newsrooms and research institutions can use plans matched to regular, intensive use.

Comparison with SumizAI

CheckForFacts and SumizAI address different needs related to AI-assisted work with information. CheckForFacts is a specialized fact-verification tool, focused solely on identifying and rating the credibility of claims in text. SumizAI, by contrast, is a general platform for conversations with multiple AI providers at once, unrelated to a specific fact-checking process. A journalist verifying an article in CheckForFacts might additionally use SumizAI when they need broader context on a topic or a comparison of how different AI models interpret the facts.

AI notes from the fact-checking process

Journalists and researchers using CheckForFacts often save verification results as ai notes, documenting which sources turned out credible and which needed to be rejected during research for a specific article or publication. Such an ai notes base becomes a valuable resource over time when working on further texts on similar topics, helping avoid re-verifying the same sources from scratch. Newsrooms keeping a shared archive of fact-checking ai notes build collective knowledge about the credibility of individual sources, useful for every journalist on the team. Source links attached to every rating mean the content of such notes stays fully verifiable even months later, once the details of the original research have started to fade from memory.

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 CheckForFacts 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.
• CheckForFacts is freemium: there is a free tier and a paid one, and the line between them is the thing to read before committing. SumizAI has one plan at a dollar a month, so there is no feature held back for a higher tier — and an unpaid account still opens and exports every vault it already has.
• AlternativeTo's description of CheckForFacts 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.
• CheckForFacts 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.
• Both are run from the EU: SumizAI's operator is registered in Poland and the servers are in Germany.

Which one to pick