Venture firm in listed AI tools
645 Ventures
645 Ventures has backed 2 companies behind 5 listings on Anchor Terminal.
Companies on Anchor Terminal
Causely, Inc.
Source causely.ai/company
Fish Audio Seed, July 2026
- Fish Audio Drama 3 C · Text-to-speech
- Fish Audio S2 Pro D · Text-to-speech
- Fish Audio TTS API C · Text-to-speech
- Fish Audio Voice Cloning API C · Voice cloning & custom voices
Source fish.audio/blog/…
Where they invest
Text-to-speech 3 Observability & incidents 1 Voice cloning & custom voices 1
Founders they backed
- Shmuel Kliger Causely, Inc.
- Christine Miller Causely, Inc.
- Endre Sara Causely, Inc.
- Enlin Xu Causely, Inc.
Questions
Which AI tools has 645 Ventures invested in?
Anchor Terminal lists Causely, Inc. and Fish Audio backed by 645 Ventures.
How are 645 Ventures's companies graded?
On 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).
Investors 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 and the date it was researched. 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.