Problem

Double addresses the everyday friction of AI-assisted coding inside VS Code. Its positioning is built around shortcomings developers may encounter with GitHub Copilot, including distracting or incorrect completions, unmatched brackets, missing auto-imports, unreliable multi-cursor support, weak variable naming, and the inability to trigger suggestions mid-line. The economic pain is primarily lost engineering time and broken concentration rather than a publicly quantified dollar cost. The killer use case is helping developers complete and modify code in place while avoiding manual cleanup, context switching, and copy-pasting between an editor and a chat tool.

Product / Service

Double is a VS Code-based AI coding assistant delivered as an extension, with a free trial and paid Pro and Business plans. It combines sidebar chat, real-time autocomplete, inline editing, custom instructions, keyboard-driven controls, and access to multiple large language models. Developers can pass selected code or files into chat, ask for explanations, tests, comments, or new code, and use CodeSnap to stream proposed changes into the open file for line-by-line review and acceptance. Autocomplete uses the current file and imported libraries, can automatically add missing imports, supports mid-line suggestions and multi-cursor editing, and is designed to reduce the friction between an AI suggestion and working code.

Market

Double competes in the AI coding assistant and developer-tools market, most directly against GitHub Copilot, which it describes as the alternative it aims to improve upon inside VS Code. The broader competitive set includes editor-centric tools such as Cursor and Codeium/Windsurf, alongside newer coding agents such as Cline, Claude Code, and Codex. Double differentiates through a focused VS Code experience, low-friction code application and review, model choice, and a performance-oriented emphasis on completion quality and latency.

Publicly visible traction appears early-stage but credible: Y Combinator lists Double as an active Winter 2023 company founded in 2022, with a two-person team, and Double's documentation confirms YC backing. Its commercial model is visible through a 30-day free trial followed by paid Pro and Business tiers, with annual-plan discounts and fair-use limits. The public materials reviewed do not disclose revenue, customer, or user counts, so it is more accurate to describe traction as undisclosed than to assert that the company is definitively pre-revenue.