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  "markdown": "Angel investor.\n\n## Companies on Anchor Terminal\n\n- **AssemblyAI**, Series C, December 2023\n  - [AssemblyAI Speech-to-Text (Universal)](https://www.anchorterminal.com/tools/assemblyai-stt.md), graded B, 66.9/100\n  - Source: https://www.assemblyai.com/blog/announcing-our-50m-series-c-to-build-superhuman-speech-ai-models\n- **AssemblyAI, Inc.**, Series C, December 2023\n  - [AssemblyAI Voice Agent API](https://www.anchorterminal.com/tools/assemblyai-voice-agent.md), graded B, 64.6/100\n  - Source: https://www.assemblyai.com/blog/announcing-our-50m-series-c-to-build-superhuman-speech-ai-models\n\n## Where they invest\n\n- Speech-to-text, 1\n- Conversational voice agents, 1\n\n## Founders they backed\n\n- [Dylan Fox](https://www.anchorterminal.com/people/dylan-fox/), AssemblyAI, AssemblyAI, Inc.\n\n## Questions\n\n### Which AI tools has Keith Block invested in?\n\nAnchor Terminal lists AssemblyAI and AssemblyAI, Inc. backed by Keith Block.\n\n### How are Keith Block's companies graded?\n\nOn Anchor Terminal's benchmark, AssemblyAI Speech-to-Text (Universal) (B, 66.9) and AssemblyAI Voice Agent API (B, 64.6).\n\nInvestors are named from the companies' own announcements, the investors' own pages, Y Combinator's company pages, public filings and news reports of a round, each with its source. An investor isn't a sign of quality, and nobody can pay to be listed or to change a grade. To correct something or have a page removed, write to privacy@anchorterminal.com.\n",
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