The best Note-taking alternative to Concepts is Microsoft OneNote, which is free. If that doesn't suit you, our users have ranked more than 25 alternatives to Concepts and many of them are Note-taking Tools so hopefully you can find a suitable replacement. Other interesting Note-taking Tool alternatives to Concepts are Xournal++, Linwood Butterfly, Rnote and Saber.
Concepts alternatives are mainly Note-taking Tools, but if you're looking for
Digital Painting Tools or Whiteboards you can filter on that. Other popular filters include
Android,
Open Source and
Windows. You can also filter by region, for example
EU-based alternatives if you prefer software developed in the European Union. These are just examples - use the filter bar below to find more specific alternatives to Concepts.
There's a paywall for exporting it in SVG, PNG, PDF.
In Xournal++, you can increase the canvas size to any size you want. It is not unlimited size, but you can export it as a PDF, PNG, or even SVG.