Know what your AI actually costs. Before the invoice does.
SpendTower shows every token and dollar across Claude, OpenAI, and Gemini, forecasts where the bill is heading, and keeps a human in the loop before spend runs away.
Founding partners get a full year free, a direct line to the team, and a say in the roadmap. A small cohort. Early access opens soon.
The problem
Teams move fast. The bill moves faster.
Leadership wants everyone using AI. So keys get handed out, spend scatters across a dozen provider consoles, and nobody owns the total. Then the invoice arrives.
Spend is opaque and lumpy
There is no single trustworthy number for what you are spending this month, let alone per team or per product.
There is no forward view
An eight thousand dollar month quietly becomes a forty thousand dollar month, and the first anyone hears of it is the bill.
Model choice goes unmanaged
Engineers reach for the biggest model by habit, on workloads where a smaller one would score within a point or two.
There are no guardrails
A bad deploy or a runaway retry loop can burn a month of budget overnight, and nothing flags it until reconciliation.
How it works
Live in an afternoon, with no risk to production.
Three steps, none of which touch the code path your customers depend on.
Connect read only
Link each provider with a read-only key scoped to usage and billing. Nothing is installed, nothing proxies your traffic, and no prompt content ever reaches us.
See the number, and the forecast
Unified dollars and tokens across every provider, sliced by team, model, and key, with a projection of where the month actually lands.
Set thresholds and route them
Budgets per team, alerts to email and Slack, and an escalation ladder that ends with a person approving, never an automatic switch.
What it does
Four jobs, one control tower.
Each one exists to answer a question the budget owner cannot answer today.
See it all, attributed to a team
Every token and dollar across every provider, mapped to the team, project, and key that spent it. This is the number most organisations cannot produce today, and it is usually the first thing that changes a conversation.
Our totals reconcile to within 2% of the provider's own invoice.
See it coming, with days to spare
Run-rate projection to month end, budget versus forecast per team, and days to limit. A three times spike gets flagged within a day, not discovered during reconciliation three weeks later.
Every budget overage is warned with at least five days of runway.
Spend less without flying blind on quality
Anyone can tell you to use a cheaper model. SpendTower shows what the swap costs you in accuracy first, backed by quality signals, so the call is yours and it is an informed one.
Identified versus realised savings, tracked against what SpendTower costs.
accuracy -2.1%
accuracy -3.4%
accuracy 0%
Stay in control, without a kill switch
Threshold rules escalate by severity and route to the people who can act. At the top of the ladder a person reviews and approves. SpendTower never throttles anything on its own.
Who was notified, who approved, and what happened, all in one audit log.
Governance done right
Rules trigger. A human decides.
A kill switch that wrongly throttles production is worse than the overspend it prevents. So SpendTower raises the flag, routes it to a person with the context to judge it, and waits. Automatic enforcement is something you can opt into much later, never something we turn on for you.
Why SpendTower
The pieces exist. Nobody assembled them for the budget owner.
Each neighbouring category does part of this well. None of them was built for the person who signs off on the spend.
| Capability | CategoryGateways | CategoryObservability | CategoryCloud FinOps | CategorySpendTower |
|---|---|---|---|---|
| One spend number across providers | ||||
| Attribution to named teams | ||||
| Month-end forecast versus budget | ||||
| Right-sizing with the accuracy tradeoff shown | ||||
| Escalation with human approval | ||||
| Built for finance, not only engineering |
This is our read of the category as of August 2026, and individual products vary a great deal. If we have a neighbour wrong, tell us and we will fix it.
Questions
The things buyers ask first.
Mostly about access, risk, and what we can actually see. Short answers here, the longer list on the FAQ page.
Do you see our prompts or completions?
No. We read usage and billing metadata through each provider's API: model, token counts, cost, key, and timestamp. Prompt and completion content is never requested and never stored.
Does SpendTower sit in our request path?
No. We are read only by design, so an outage on our side cannot affect your production traffic. An optional inline gateway for real-time enforcement is on the long-term roadmap as something you opt into, not part of the core product.
Will it ever throttle production on its own?
No. Rules escalate and notify, and a person approves before any action is taken. There is no automated kill switch, and that is a deliberate product decision rather than a missing feature.
Which providers do you support?
Anthropic, OpenAI, and Google are first, through their usage and billing APIs. Longer-tail providers follow once the first three are solid. If you are on something else and spending seriously, tell us and it will weigh on the order.
What does it cost?
Pricing is not published yet, and we would rather not invent a number before founding partners have shaped the product. Founding partners get a full year free. Our intent is that realised savings run at several times whatever SpendTower ends up costing.
Founding partners
Get a full year free. Help shape what gets built.
We are taking on a small cohort of founding customers. In return we want your honest feedback, including the parts we will not enjoy hearing.
Apply as a founding partner- A full year of SpendTower at no cost
- A direct line to the people building it
- Real influence over what ships and in what order
- Your connectors and edge cases prioritised
Early access
Join the waitlist.
Be first in when early access opens, and get a say in the roadmap. No newsletter, no drip sequence, just the launch.
Prefer to talk first? Become a founding partner. Read how we handle your details in the privacy policy.