Austin-based RapidCanvas, which uses agents to help businesses build custom AI tools, raised a ∼$29M Series B led by Vertex Ventures and Hitachi Ventures (Chris Metinko/Axios)

Chris Metinko / Axios: Austin-based RapidCanvas, which uses agents to help businesses build custom AI tools, raised a ∼$29M Series B led by Vertex Ventures and Hitachi Ventures — RapidCanvas, which uses agents to help businesses build and deploy custom AI applications, has raised nearly $29 million…