Founder of a listed tool

Henry Kaestner

Named behind 2 listings on Anchor Terminal.

Co-founder, Bandwidth

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

What Henry builds

Bandwidth Messaging API + MCP B · Messaging APIs
US carrier's messaging API for SMS, MMS and RCS over 10DLC, toll-free and short codes, with published US rates.
Co-founder, Bandwidth, researched 28 October 2026 · the people behind it
Bandwidth Voice API + MCP B · Phone calling & voice transport
Programmable voice on Bandwidth's own US carrier network, with BXML call control, bidirectional WebSocket media streams, recording, transcription and transfers.
Co-founder, Bandwidth, researched 28 October 2026 · the people behind it

Works with

David Morken Co-founder, CEO and Chairman, Bandwidth

Questions

Who is Henry Kaestner?

Henry Kaestner is co-founder of Bandwidth.

What does Bandwidth make?

Anchor Terminal lists Bandwidth Messaging API + MCP and Bandwidth Voice API + MCP from Bandwidth. US carrier's messaging API for SMS, MMS and RCS over 10DLC, toll-free and short codes, with published US rates.

How are Henry's tools graded?

Bandwidth Messaging API + MCP is graded B, 64.3 out of 100; Bandwidth Voice API + MCP is graded B, 63.7 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.

Do agents find, use and choose your tools?

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.