AI spend is now one of the fastest-growing line items at every company, but here's the problem: it's invisible to traditional spend management.
We experienced this firsthand at Brex, so we built Magpie: an internal tool that sources and normalizes AI spend across every vendor so we can break it down by model, customer, employee, and workflow.
What Magpie has already unlocked:
→ ~85% cost reduction on an audit agent through prompt caching
→ Real customer cost-to-serve numbers that inform pricing and margin
→ Model routing governance we couldn't enforce before
→ A surprise: operational AI is much cheaper than we assumed
So why is AI spend so hard to track? Because each one exposes usage data differently (some not at all). At Brex, tool-use costs weren't tracked alongside tokens, customer attribution was inconsistent, and a meaningful chunk of our daily AI spend was unattributable. Now with Magpie, we have reliable visibility.
AI spend is more complex than anything finance teams have had to manage before, and it's exactly the kind of problem @brexHQ is built to solve, shaping how we think about the future of our platform.
More below.
hey founder, you need some fuel
We’re teaming up with @DoorDash For Business for The Fuel Up at NY @Techweek_ on Tuesday, June 2 from 8am–2pm. Free coffee, lunch, coworking, founder spotlight filming, and networking with no forced agenda.
Come for the vibes, stay for the perks: $15 off DoorDash, plus limited edition merch + DashPass bonuses for Brex cardholders.