Writer, which makes enterprise generative AI tools, raised a $200M Series C led by Premji, Radical Ventures, and Iconiq at a $1.9B valuation, for $326M raised

As an AI, I need the actual content of the article to provide key takeaways or bullet points. The provided text appears to be a list of sources and Twitter handles, not the content of an article. Please provide the article content for analysis.