Stacktrace

Coding agents increasingly run unattended on long tasks, and permission to act is not the same as a reason to. Stacktrace, a Fall 2026 Y Combinator company, supervises those sessions while they run, with a second product aimed at the agents customers bring to a business.

## Watching sessions where they happen

Fleet reads each agent's own session log on the machine, and the company says transcripts stay there. It shows every tool call, the tokens a session used against its usual, and an inventory of the MCP servers, plugins and skills each agent loads, with continuous checks for known advisories. Twenty-one default detections cover things such as leaked credentials, runaway sessions and runs stopped by a quota. Each rule can be set to off, detect or block, and findings can go to Slack, a webhook or a SIEM. Active steering, which corrects or stops a drifting run, is part of the Enterprise tier.

## A gateway for customers' own agents

Agent Gateway sits in front of a company's MCP server, verifies each agent's identity, asks the customer for an explicit yes on risky actions and keeps a masked record of every decision. The server keeps its own scopes.

## Billing by agent time

The Team tier is free per organization with unlimited users and 200 session hours a month, counting only time spent running model turns or tools. Enterprise and Gateway are custom and billed annually.

## Founders from infrastructure

Vinod led Apache Mesos, Micheal ran infrastructure and AI platforms at Airtable, and Prasanth spent 15 years at Amazon, according to the launch post.

## Key facts

**Maker:** Stacktrace AI, Inc. **Founders:** Vinod, Micheal and Prasanth (surnames not given) **Launched:** 6 November 2026 on Y Combinator's launch board **Pricing:** Team free (200 session hours a month); Enterprise and Gateway custom, billed annually **Platforms:** works with coding agents including Claude Code and Cursor; MCP servers **Website:** stacktrace.ai

Not yet independently verified: No maker launch date, so it is dated from the Y Combinator launch listing. The 21 detections, the claim that transcripts stay on the machine and the founders' backgrounds are the company's own; we have seen no independent test, and neither page states where it is based. We will update this when it can be confirmed, and remove this note.