
Callstack.ai develops AI-powered solutions to accelerate and improve the reliability of software development. Their key products include Code Reviewer, an automated code review tool integrated into CI/CD pipelines to ensure bug-free, secure, and performant pull requests, and DeepCode, a code-optimized retrieval augmented generation (RAG) engine that deeply maps code hierarchies and relationships to enhance code generation fidelity and reduce hallucinations. The company targets development teams of all sizes, offering flexible pricing plans including free tiers for individuals and open-source projects, and custom enterprise solutions. Callstack.ai emphasizes a high-performance engineering culture and aims to make software development faster, cheaper, and more reliable at scale.

Callstack.ai develops AI-powered solutions to accelerate and improve the reliability of software development. Their key products include Code Reviewer, an automated code review tool integrated into CI/CD pipelines to ensure bug-free, secure, and performant pull requests, and DeepCode, a code-optimized retrieval augmented generation (RAG) engine that deeply maps code hierarchies and relationships to enhance code generation fidelity and reduce hallucinations. The company targets development teams of all sizes, offering flexible pricing plans including free tiers for individuals and open-source projects, and custom enterprise solutions. Callstack.ai emphasizes a high-performance engineering culture and aims to make software development faster, cheaper, and more reliable at scale.
Founded: 2021
Headquarters: San Francisco, California, United States
Employee count: 1–10
Primary products: Code Reviewer; DeepCode (RAG engine)
Known funding: Pre-Seed (announced 2022-06-01)
Developer tooling for automated code review and code-aware AI generation.
2021
Software / Developer Tools / AI
Round lists seven investors including N1, Expedite Ventures, DEPO Ventures, Jude Gomila, Credo Ventures, Fredrik Björk, and Kamil Levinský.
“Backed by a group of early-stage investors (multiple named investors participated in the Pre-Seed round)”