Case study · Public financial services
A listed financial services firm cut its AI bill by 82.4%, and brought every prompt back in-house.
82.4%
Lower monthly AI spend
$444,960
Projected saving each year
100%
Data kept on their own premises
Monthly AI spend
Where they started
Cloud AI had become popular across teams, and the bill had grown to $40,000–50,000 a month with no ceiling in sight. Meanwhile, every prompt was being processed on third-party servers, which worried risk, compliance and audit.
What changed
Element 31 placed a sealed, air-gap capable appliance inside their own environment. Inference now runs on hardware they own, and teams kept working exactly as before, with no new habits to learn.
What it means
A fixed, predictable cost instead of a meter. A full, self-hosted log of AI usage. And integrity evidence they can hand to auditors and examiners whenever they're asked.
“The appliance made AI cheaper. Substrate made it defensible.”
Client name withheld under a mutual confidentiality agreement. Savings are modelled on the client's reported $40,000–50,000 monthly baseline (midpoint $45,000) and the 82.4% reduction achieved after deployment.

