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  "markdown": "Venture firm.\n\nWebsite: https://645ventures.com\n\n## Companies on Anchor Terminal\n\n- **Causely, Inc.**\n  - [Causely MCP server](https://www.anchorterminal.com/tools/causely.md), graded E, 39.7/100\n  - Source: https://www.causely.ai/company\n- **Fish Audio**, Seed, July 2026\n  - [Fish Audio Drama 3](https://www.anchorterminal.com/tools/fish-audio-drama-3.md), graded C, 55.6/100\n  - [Fish Audio S2 Pro](https://www.anchorterminal.com/tools/fish-audio-s2-pro.md), graded D, 52.5/100\n  - [Fish Audio TTS API](https://www.anchorterminal.com/tools/fish-audio-tts.md), graded C, 60.7/100\n  - [Fish Audio Voice Cloning API](https://www.anchorterminal.com/tools/fish-audio-voice-cloning.md), graded C, 60/100\n  - Source: https://fish.audio/blog/fish-audio-52m-seed-funding/\n\n## Where they invest\n\n- Text-to-speech, 3\n- Observability \u0026 incidents, 1\n- Voice cloning \u0026 custom voices, 1\n\n## Founders they backed\n\n- [Shmuel Kliger](https://www.anchorterminal.com/people/shmuel-kliger/), Causely, Inc.\n- [Christine Miller](https://www.anchorterminal.com/people/christine-miller/), Causely, Inc.\n- [Endre Sara](https://www.anchorterminal.com/people/endre-sara/), Causely, Inc.\n- [Enlin Xu](https://www.anchorterminal.com/people/enlin-xu/), Causely, Inc.\n\n## Questions\n\n### Which AI tools has 645 Ventures invested in?\n\nAnchor Terminal lists Causely, Inc. and Fish Audio backed by 645 Ventures.\n\n### How are 645 Ventures's companies graded?\n\nOn Anchor Terminal's benchmark, Causely MCP server (E, 39.7), Fish Audio Drama 3 (C, 55.6), Fish Audio S2 Pro (D, 52.5), Fish Audio TTS API (C, 60.7) and Fish Audio Voice Cloning API (C, 60).\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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