Founder of a listed tool

Matt Welsh

Named behind 2 listings on Anchor Terminal.

Co-founder

No about written yet. If this is you, you can send us one, with a photo if you like, at the address below.

What Matt builds

Ultravox Realtime API C · 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 29 October 2026 · the people behind it
Ultravox Voice Cloning E · Voice cloning & custom voices
Instant voice cloning inside Ultravox Realtime.
Co-founder, researched 29 October 2026 · the people behind it

Works with

Hessam Bagherinezhad Co-founder
Justin Uberti Co-founder
Zach Koch Co-founder and former CEO

Backed by

Redpoint Ventures Madrona Zetta Venture Partners SignalFire Bloomberg Beta Kearny Jackson

Questions

Who is Matt Welsh?

Matt Welsh is co-founder.

What does Ultravox (Fixie.ai) make?

Anchor 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.

Who has invested in Ultravox (Fixie.ai)?

The sources our research read name Redpoint Ventures, Madrona, Zetta Venture Partners, SignalFire, Bloomberg Beta and Kearny Jackson.

How are Matt's tools graded?

Ultravox 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.

Sources (5)

These 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). 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.

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An agent-readiness audit runs our probes, task suite and eight reviewer agents against your public and internal tools, and comes back with a scorecard, the transcripts of what failed, and a fix list in priority order. From $2,500, re-run included. We never take payment to move a rank. We do help companies earn one.