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  "markdown": "Co-founder.\n\n## What Matt builds\n\n- [Ultravox Realtime API](https://www.anchorterminal.com/tools/ultravox.md), graded C, 58.6/100, in Conversational voice agents. Hosted voice agents on Ultravox, an open-weight model that takes speech directly with no speech-to-text step and answers through a TTS voice. Co-founder, researched 2026-10-29.\n- [Ultravox Voice Cloning](https://www.anchorterminal.com/tools/ultravox-voice-cloning.md), graded E, 40.9/100, in Voice cloning \u0026 custom voices. Instant voice cloning inside Ultravox Realtime. Co-founder, researched 2026-10-29.\n\n## Works with\n\n- [Hessam Bagherinezhad](https://www.anchorterminal.com/people/hessam-bagherinezhad/), Co-founder\n- [Justin Uberti](https://www.anchorterminal.com/people/justin-uberti-2/), Co-founder\n- [Zach Koch](https://www.anchorterminal.com/people/zach-koch/), Co-founder and former CEO\n\n## Backed by\n\n- [Redpoint Ventures](https://www.anchorterminal.com/investors/redpoint-ventures/)\n- [Madrona](https://www.anchorterminal.com/investors/madrona/)\n- [Zetta Venture Partners](https://www.anchorterminal.com/investors/zetta-venture-partners/)\n- [SignalFire](https://www.anchorterminal.com/investors/signalfire/)\n- [Bloomberg Beta](https://www.anchorterminal.com/investors/bloomberg-beta/)\n- [Kearny Jackson](https://www.anchorterminal.com/investors/kearny-jackson/)\n\n## Questions\n\n### Who is Matt Welsh?\n\nMatt Welsh is co-founder.\n\n### What does Ultravox (Fixie.ai) make?\n\nAnchor Terminal lists Ultravox Realtime API and Ultravox Voice Cloning from Ultravox (Fixie.ai). Hosted voice agents on Ultravox, an open-weight model that takes speech directly with no speech-to-text step and answers through a TTS voice.\n\n### Who has invested in Ultravox (Fixie.ai)?\n\nThe sources our research read name Redpoint Ventures, Madrona, Zetta Venture Partners, SignalFire, Bloomberg Beta and Kearny Jackson.\n\n### How are Matt's tools graded?\n\nUltravox Realtime API is graded C, 58.6 out of 100; Ultravox Voice Cloning is graded E, 40.9 out of 100, on Anchor Terminal's benchmark, which scores every listing against the same checklist.\n\n## Sources\n\n- https://www.ultravox.ai/\n- https://www.ultravox.ai/about\n- https://www.ultravox.ai\n- https://x.com/zachk\n- https://docs.ultravox.ai/gettingstarted/getting-help\n\nThese are the people building the tools we list, named for their public role in the company or project behind a listing, from public pages, with the date it was researched. They don't work for Anchor Terminal (our own team is on the about page, /about/#author). We show public roles, public profiles and what the listing pages show, nothing private. To correct something, send an about or a photo, or have a page removed, write to privacy@anchorterminal.com.\n",
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