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Mirrors

YC F26

San Francisco, US · Founded 2026 · 2 employees · 1 known investors

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Mirrors offers regression testing for AI agents by reconstructing the internal tools and APIs an agent uses from production traces, then replaying real sessions against each code change to flag differences in tool calls, arguments, and resulting state. It runs in CI on every pull request and targets teams whose agents perform irreversible actions such as issuing refunds, updating records, or sending outbound email.

AI & Machine LearningData & InfrastructureDeveloper ToolsEnterprise SoftwareSaaSAIOpsArtificial IntelligenceB2BUnited States of AmericaAmerica / Canada

Founders & leadership· Y Combinator alumni (F26)

Mirrors was founded in 2026 by Aryan Singhal and Aditya Gupta.

ASAryan Singhal
Aryan SinghalFounder/CEOFounder and CEO of Mirrors (YC F26), with prior machine learning research experience at UT Austin and UCSB. Authored six AI/ML research papers, three of which appeared at NeurIPS.
AGAditya Gupta
Aditya GuptaCo-founder · Chief Technology OfficerAditya Gupta is Founder and CTO of Mirrors, and previously co-founded Profine, where he worked on automated ML optimization for open-source repositories. He built ML systems at Recharm (facial detection) and MerQube (fintech AI), and studied Computer Engineering at Purdue.

Investors · 1

Funding

SEC filings, press & company announcements

Source: company announcements and press reports — follow each round's link for the claim.

Related companies · 5

Lucidic AILucidic builds a platform for optimizing AI agent behavior through automated simulations and parameter tuning. The platform helps teams improve agent reliability, accuracy, and performance across customer-facing applications by systematically varying design choices like prompts, tools, policies, and guardrails.
HyperProbeHyperprobe provides an SDK that enables AI coding agents to capture runtime state from running services for production debugging. The platform allows developers to set live breakpoints and inspect variable values without pausing threads or redeploying code, working with tools like Cursor, Claude Code, and Codex.
Query VaryQuery Vary provides a no-code platform for building workflows that connect software inputs to large language models and output integrations, enabling tasks like data extraction from transcripts, documentation chatbots, and form-to-report automation.
BaserunBaserun provides testing and observability tools for LLM applications, helping teams monitor latency, costs, and output quality while debugging and evaluating model behavior.
LaminarLaminar is an observability and debugging platform for AI agents that captures failures, surfaces root causes, and confirms fixes through trace visualization, automated anomaly detection, and eval-driven development. It serves AI teams building and iterating on agent applications.

Companies working in the same space as Mirrors.

Frequently asked questions

What does Mirrors do?
Mirrors offers regression testing for AI agents by reconstructing the internal tools and APIs an agent uses from production traces, then replaying real sessions against each code change to flag differences in tool calls, arguments, and resulting state. It runs in CI on every pull request and targets teams whose agents perform irreversible actions such as issuing refunds, updating records, or sending outbound email.
Who founded Mirrors?
Mirrors was founded by Aryan Singhal, Aditya Gupta in 2026.
Who are Mirrors's investors?
Mirrors's investors include Y Combinator.
Where is Mirrors headquartered?
Mirrors is headquartered in San Francisco, US.