GitHub Copilot

What it does

GitHub Copilot is the leading AI coding assistant, embedded in VS Code and other IDEs to suggest code completions, generate functions from comments, write tests, and explain existing code. Copilot Chat provides conversational coding assistance. Copilot Workspace (preview) extends this to full feature implementation from an issue description. Microsoft and GitHub back it with the largest developer user base of any AI coding tool.

Strengths

• Mid-market engineering organizations use Copilot Business for team-wide adoption with policy controls and IP indemnity.
• Enterprise engineering teams use Copilot Enterprise for fine-tuning on internal codebases, deeper IDE integrations, and GitHub-native security and compliance controls.
• Small software companies use Copilot to increase engineering output without proportional headcount growth.
• Small engineering teams standardize on Copilot for consistent developer experience with centralized billing and usage analytics.
• Individual developers get AI pair programming for free (for open source contributors) or $10/month - significantly reducing time spent on boilerplate and routine implementation.

Watch-outs

• Suggestions can introduce bugs: Copilot completions are pattern-matched, not semantically verified — they can reproduce insecure coding patterns or introduce subtle logic errors that require careful review.
• Quality varies significantly by language: Copilot performs excellently for Python, JavaScript, and TypeScript but is noticeably weaker for less common languages or niche frameworks with limited training data.
• No full repo context by default: Standard Copilot works within a single file — understanding multi-file dependencies and making coordinated codebase-wide changes requires the separate Copilot Workspace feature.

Pricing

Individual at $10/month or $100/year (free for students and open source). Business at $19/user/month. Enterprise at $39/user/month.