LegalCredits

What we built on.

Open-source tools, typefaces, and imagery that make this site work. Listed here in plain view because the licences ask for it, and because it's the right thing to do.

Typefaces.

Fraunces

Display serif by Undercase Type via Google Fonts. SIL Open Font Licence 1.1.
Geist

UI sans by Vercel via Google Fonts. SIL Open Font Licence 1.1.
JetBrains Mono

Monospace by JetBrains via Google Fonts. SIL Open Font Licence 1.1.

Iconography.

Section icons

Custom in-house, drawn to echo the geometric weight and copper of the Alt Horizon wordmark. No external attribution required.
Lucide

Small utility marks (carets, ticks, chevrons) follow the Lucide conventions. ISC Licence.
Bootstrap Icons

A handful of nav and inline icons via Bootstrap Icons. MIT Licence.

Frameworks & infrastructure.

Bootstrap

Grid utilities and accessibility helpers from Bootstrap. MIT Licence.
Umami

Self-hosted privacy-friendly analytics by Umami. MIT Licence.
Cloudflare Turnstile

Bot protection on the contact form via Cloudflare Turnstile.

Imagery.

Photography on this site is either commissioned, taken in-house, or sourced from Unsplash under the Unsplash licence.

Home · trust strip

London skyline. Photo · Unsplash (contributor credit pending).
Home · §3 Delivery

Modernist library stairwell by Niklas Ohlrogge on Unsplash.
Home · §4 Outcomes

Empty boardroom by Nastuh Abootalebi on Unsplash.
Home · §7 Closing

Calm horizon over water by Viktor Talashuk on Unsplash.
About · hero

The Rose Main Reading Room at The New York Public Library by John Angel on Unsplash. Also used on the Resources hero.
Services · hero

Workspace lamp on wooden desk by Andrej Lišakov on Unsplash.
Methodology · hero

Geometric architectural pattern by JJ Ying on Unsplash. Also used on the Horizon (full) agent reference.
Cyber agent · hero

Padlock close-up by Kaffeebart on Unsplash.
ESG agent · hero

Electricity meter close-up by Alexander Schimmeck on Unsplash.

If you spot an attribution we've missed, tell us and we'll fix it.