Stacktrace

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.

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