ByteAsk

Not yet independently verified. Dated from the Y Combinator launch post of 10 November 2026, as the site gives no launch date. The cost and success figures are the makers' own, and the page names no city or country. We will update this when it can be confirmed, and remove this note.

General AI coding tools often guess in C++, where one call can reach an overload, a template specialisation or a preprocessor branch the build never compiles. ByteAsk is an AI engineer for C and C++ that works from the project's own build instead.

Reads the build, then proves the fix

ByteAsk uses the real compile flags and call graph to find which function a call actually reaches, and reads old tickets, Slack threads and pull request discussions for the history behind the code. It then builds the branch, runs the tests and sanitizers, uses gdb and perf, and measures again until performance is restored. Work can start from Slack, Jira or the command line, and the result is one pull request with the evidence attached for a person to merge or reject. The makers describe a swarm mode in which many agents try different fixes in parallel on separate machines and check each other.

Where it runs

The site lists zero data retention, on-premises and air-gapped deployment, bring-your-own-key use and a free plan. It sets up from coding agents such as Claude Code, Codex, Cursor, Windsurf and VS Code. The launch post is aimed at trading, robotics, embedded, automotive and chip companies with large C or C++ codebases. Its benchmark figures, a cost saving against Codex CLI on 72 real issues, are the makers' own and are published on the company's research page.

Key facts

Launched: Y Combinator launch post, 10 November 2026 Languages: C, C++ and CUDA Inputs: Slack, Jira, command line Deployment: cloud, on-premises, air-gapped Plan: free plan available