Approxima

Your software should build itself.

Y CombinatorWinter 2026ActiveB2BEngineering, Product and DesignEnterprise SoftwareInfrastructureAI

What they do

Problem

Software teams spend too much time on routine maintenance, bug fixes, and incremental updates instead of higher-value innovation.

Solution

Approxima provides AI agents that scope tasks, write code, validate fixes end-to-end in sandbox environments, and merge changes to production.

Who it's for

Software engineering teams and developers maintaining and updating production codebases.

Founders

Ethan Pronev

Founder

Co-founder at Approxima, building the trust layer to help software development scale with AI. Previously worked on trading systems at Jane Street and Citadel Securities. Computer Science graduate from the University of Waterloo, class of 2025.

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Ashish Selvaraj

Founder

Co-founder at Approxima, building the trust layer to help software development scale with AI. Previously worked on delta live tables at Databricks, an infra testing engine at Microsoft and graduated with a double degree in Computer Science and Business from Waterloo in 2025.

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