Cosine

Active

Country: United Kingdom (GB)
Founded: 2022
Developer: CosineAI
Pricing: Freemium
Open source: No
Platforms: Linux, macOS, Windows, Web

Indexes

AI Coding

Overview

Cosine is an AI software engineer that operates across CLI, desktop, and cloud interfaces to handle complex coding tasks. It understands codebases, plans changes, writes code, and opens pull requests asynchronously, allowing developers to assign multiple tickets for later review. Designed for software engineering teams, it supports task handoff without losing context across surfaces and focuses on maintainability for longer tasks and team workflows.¹²³⁴

Key Features

Cross-surface operation - Single agent works across CLI, desktop (VS Code), and cloud without losing context.
Autonomous task completion - Handles end-to-end tasks including planning, coding, and PR creation without supervision.
Codebase understanding - Analyzes existing codebases to make relevant changes.
Asynchronous processing - Processes multiple tickets in parallel for backlog management.
Team handoff support - Enables seamless continuation of tasks across team members and environments.
Production deployment - Configures deployments with tools like Argo.
Local and cloud execution - Starts tasks locally and scales to cloud as needed.

Pricing

Plan	Price	Includes
Free	Free	Basic local CLI and desktop access.
Cloud	Paid (login required)	Cloud-based agent scaling and parallel processing.

Platforms & Requirements

Cosine runs on Linux, macOS, and Windows via CLI (install via curl script) and desktop (VS Code integration), with a web-based cloud interface. No specific minimum requirements listed; supports local execution extending to cloud. Windows support noted alongside macOS and Linux.²³

Integrations & Ecosystem

VS Code
Argo (production deployment)
GitHub (PR creation)
CLI tools

Alternatives

App	Difference
Cursor	IDE-focused AI coding with real-time assistance, less emphasis on fully agentic async PR workflows.
Replit Agent	Cloud IDE-centric agent for prototyping, lacks multi-surface CLI/desktop continuity.
GitHub Copilot	Inline code completion tool, not fully autonomous for end-to-end ticket handling.
Aider	CLI-only AI pair programmer, no integrated cloud or desktop surfaces for team scale.

Reputation

Cosine receives positive feedback for its agentic capabilities in handling complex, async tasks across platforms, with a 4.7/5 rating on Product Hunt from early users praising backlog tackling.⁴ It stands out for dev-built focus on maintainability over copilot-style tools.²³ Limited reviews available due to recent Y Combinator launch; no major criticisms noted in sources.

Sources (4)