Your AI agents have no rules.

eStack enforces limits, controls behavior, and generates audit-ready evidence — without changing your code.

Change your base URL. That’s it.

Get control in 5 minutes

AI agents are running. Nobody is watching.

Every team is deploying AI agents. Few can answer basic questions about what they’re doing and costing.

No visibility into AI spend

You don’t know what AI costs per team, project, or agent. Finance asks. You guess.

No limits per team or agent

Any agent can call any model with no budget cap. One runaway loop can burn through thousands.

Can’t explain AI decisions to auditors

When auditors or leadership ask what your agents are doing, there’s no single source of truth.

Inconsistent internal tooling

Every team builds their own wrapper, their own logging, their own cost tracking. Nothing connects.

Growing compliance risk

Regulations are catching up to AI. You need audit trails that don’t exist yet.

The control layer

eStack sits between your agents and model providers. It enforces rules and generates evidence.

One integration. Full governance. No code changes.

Spend control

Set budget limits per team, project, or agent. Get alerted before overruns. Never be surprised by an AI bill again.

Policy enforcement

Define rules: which agents can use which models, when, and how much. eStack enforces them in real time.

Automatic model downgrade

When a budget threshold is hit, eStack automatically downgrades to a cheaper model. No code changes. No outages.

Audit trail

Every call is logged with full context: who, what, when, how much. Shareable with auditors, finance, and leadership.

Explainability

Generate reports that non-technical stakeholders actually understand. Cost by team. Calls by agent. Compliance in one click.

Who it’s for

Built for the people responsible for AI governance

Finance

Know exactly what AI costs, broken down by team and project. Generate cost reports that close the books.

Compliance & Risk

Prove what your agents are doing to auditors and regulators. Full audit trail, no manual work.

Operations

Set guardrails once. Enforce them across every agent and team. No more ad hoc controls.

Engineering

Keep building. eStack handles governance, limits, and evidence. One URL change and you’re done.

How it works

Three steps. Full control.

1

Change your base URL

Point your OpenAI client to proxy.estack.ai. No SDK, no wrapper, no code changes.

2

Define your rules

Set budget limits, model policies, and access controls in the dashboard.

3

Get control instantly

Every call is enforced, tracked, and logged. Evidence generates automatically.

Start in 5 minutes

See it in action

A single request. Full governance.

Incoming request
POST /v1/chat/completions
Agent: pricing-bot · Team: billing · Model: gpt-4o
Rule triggered
Budget limit: $500/day · Spent: $487.20
Action: Downgraded to gpt-4o-mini
Cost tracked
This call $0.003
Today $487.20
Month $12,847
Audit log
14:32:01pricing-botgpt-4o-mini$0.003budget-cap
14:31:58research-agentgpt-4o$0.042
14:31:55code-reviewergpt-4o$0.038
100%

Call visibility

<1ms

Added latency

Zero

Code changes

5 min

Time to first rule

Privacy-first by default. No request data used for training.

Built with Swiss precision.