Plandex

AI-first code editor built on VS Code with deep AI integration for code generation and editing.

Cognition unveiled Devin in March 2024 as 'the first AI software engineer', capable of taking a Linear ticket and shipping a pull request end-to-end. Independent reviewers (notably Carl Brown's analysis) showed the launch demo was carefully edited and that real-world success rates were modest. Cognition kept iterating and acquired Windsurf in July 2025 to give Devin a real IDE surface. The company's valuation reached $4B+ in 2025 funding rounds.

AI pair programmer that suggests code completions in your IDE, powered by OpenAI Codex.

Replit Agent is an AI software-building tool within Replit that turns natural-language requests into working applications. It can plan projects, write code, configure infrastructure, test changes, and deploy apps from the browser.

Sweep was an AI coding agent that converted GitHub issues and bug reports into proposed code changes and pull requests. Its original product was later discontinued as the team shifted to an AI-assisted JetBrains coding plugin.

Ultimate was a customer-support automation platform that used conversational AI to resolve requests across chat, email, and social channels. Zendesk acquired the company in 2024 and integrated its technology into Zendesk AI.

Hyperlight was an AI-agent startup focused on automating customer-service workflows for businesses. Public reporting indicates that the company was acquired by Cresta in 2024 to strengthen Cresta's AI capabilities.

Sana Agents is an enterprise AI agent platform from Sana Labs for creating and deploying agents that work with organizational knowledge, connect to business systems, and automate research, analysis, and recurring workflows.