AI coding agents & harnesses

StackBlitz

Browser-based AI app builder powered by WebContainers that generates, runs, and iterates on full-stack applications entirely in the browser.

Default model: Claude Sonnet 4.6

vendor managed · vendor cloud

Free: Free · Premium: $20/mo · Team: $30/mo · Business: $100/mo · … — Freemium; Premium at $20/mo

Lovable

AI-powered full-stack app builder that converts natural language into production-ready applications with Supabase backend integration and GitHub sync.

Default model: Claude Sonnet 4.6

vendor managed · vendor cloud

Free: Free · Pro: $25/mo · Business: $50/mo · Teams: $30/mo · … — Freemium; Starter at $20/mo

Notion

Workspace-native Notion agent that can build, edit, answer questions, and take action across Notion pages, databases, projects, and connected team knowledge.

vendor managed · vendor cloud

Included in Notion AI and eligible workspace plans

Replit

Cloud-based AI agent that builds full applications from natural language prompts within Replit's browser-based IDE, with instant deployment included.

Default model: Claude Sonnet 4.6

vendor managed · vendor cloud

Starter: Free · Core: $25/mo · Pro: $100/mo · Enterprise — Included with Replit Core (~$25/mo)

Vercel

AI-powered UI generation tool that creates React/Next.js components and full-page designs from natural language prompts, with Shadcn UI and Tailwind CSS integration.

Default model: GPT-4o (2024-11-20)

vendor managed · vendor cloud

Free: Free · Premium: $20/mo · Team: $30/mo · Business: $100/mo · … — Freemium; Pro at $20/mo

Z.ai (Zhipu AI)

Zhipu AI's official desktop coding-agent app, marketed as the "official harness for GLM-5.2." Bundles 20+ programming tools (Git, terminal) and organizes multi-step work through a "Goal" construct spanning planning, execution, and verification. Supports multi-agent collaboration with role-specialized agents (e.g. frontend/backend/QA) and remote task triggering via WeChat, Feishu, and Telegram.

Default model: GLM-5.2

user owned · hybrid

Lite: $16.2/mo · Pro: $64.8/mo · Max: $144/mo — GLM Coding Plans: Lite $16.20/mo, Pro $64.80/mo (5x Lite), Max $144/mo (20x Lite)

Anima

UX design agent and design-to-code platform that turns Figma designs, prompts, or images into functional applications and teaches coding agents to use Anima MCP tools.

vendor managed · vendor cloud

Free and paid plans available

Anthropic

Anthropic Labs prompt-to-visual design surface for prototypes, slides, marketing collateral, and handoff bundles to Claude Code, powered by Claude Opus 4.7.

vendor managed · vendor cloud

Included with Claude Pro, Max, Team, and Enterprise subscriptions

Figma

AI agent inside Figma Design that can generate and remix design layers, automate busywork, search files, provide feedback, and hand work into Figma Make.

vendor managed · vendor cloud

Available through eligible Figma AI plans and seats

Framer

Framer AI agents for generating layouts, creating components, writing code, managing CMS content, and improving websites directly on the Framer canvas.

vendor managed · vendor cloud

Included with Framer plans subject to AI usage limits

Google

Google Labs AI-native design canvas that generates mobile and web UI, working prototypes, and design context from text, image, or code prompts.

vendor managed · vendor cloud

Experimental Google Labs product; public pricing not separately listed

OpenPencil

Open-source AI-native vector design editor with MCP, headless CLI, Figma-compatible files, and agent skills for coding agents to inspect, modify, and export designs.

user owned · self hosted

Free and open source

Sleek

AI mobile-app designer that generates iOS and Android screens from prompts or images, supports visual editing, exports to Figma or code, and can be driven by coding-agent skills.

vendor managed · vendor cloud

Free plan with limited AI usage; paid plans for more projects and credits

Anthropic

Anthropic's financial-services agent-template surface with ready-to-run workflows for pitchbooks, research, financial modeling, KYC, close, audit, and finance operations.

mixed · hybrid

Available on paid Claude plans as Cowork or Claude Code plugins; Managed Agents are in public beta

Anthropic

AI workbench for scientists combining literature analysis, scientific artifacts, curated science skills, auditable outputs, and compute orchestration across local machines, lab infrastructure, or GPUs on demand.

Default model: Claude Opus 4.8

mixed · hybrid

Pro: $20/mo · Max: $100/mo · Team: $25/mo · Enterprise: $20/mo — Included with Claude Pro, Max, Team, and Enterprise subscriptions

Augment

Enterprise AI coding assistant with agentic capabilities, emphasizing security, codebase understanding at scale, and team-oriented features for large engineering organizations.

mixed · hybrid

Indie: $20/mo · Standard: $60/mo · Max: $200/mo · Enterprise — Enterprise pricing (contact sales)

Cline (open source community)

Open-source VS Code extension that gives Claude or other LLMs autonomous access to the terminal, filesystem, and browser to complete complex coding tasks.

Default model: Claude Sonnet 4.6

user owned · hybrid

Free: Free — Free (user pays LLM API costs)

Continue.dev

Open-source IDE extension for VS Code and JetBrains that provides customizable AI coding assistance including chat, autocomplete, and agentic edit capabilities.

user owned · hybrid

Free / Open Source: Free — Free (open source); Enterprise plan available

Anysphere

AI-first code editor (fork of VS Code) with agentic capabilities including multi-file edits, codebase-aware completions, and an agent mode for autonomous task execution.

Default model: Claude Sonnet 4.6

mixed · hybrid

Hobby: Free · Pro: $20/mo · Pro+: $60/mo · Ultra: $200/mo · … — Freemium; Pro at $20/mo

Google

AI coding assistant powered by Gemini, integrated into VS Code and JetBrains IDEs, offering code completion, chat, and agentic code transformation capabilities.

Default model: Gemini 2.5 Pro

mixed · hybrid

Individual: Free · Standard: $19/mo · Enterprise: $45/mo — Free for individuals; Enterprise pricing for teams

GitHub (Microsoft)

AI pair programmer from GitHub with inline code completions, chat, and autonomous multi-step coding agent across VS Code, JetBrains, Neovim, and web. Supports multi-model selection including Claude, GPT, and Gemini.

Default model: GPT-4o (2024-11-20)

mixed · hybrid

Free: Free · Pro: $10/mo · Pro+: $39/mo · Business: $19/mo · …

JetBrains

Native AI assistant integrated into all JetBrains IDEs with context-aware code generation, Junie autonomous agent, and AI credits system. Supports Claude and GPT models with local model option.

mixed · hybrid

AI Free: Free · AI Pro: $8/mo · AI Ultimate: $30/mo · AI Enterprise

Kilo

VS Code extension forked from Cline, offering autonomous coding agent capabilities with a focus on reliability and team-friendly features.

Default model: Claude Sonnet 4.6

user owned · local

Free (open source)

Roo (open source fork of Cline)

VS Code extension and harness framework forked from Cline with enhanced autonomous coding capabilities and additional agent modes.

Default model: Claude Sonnet 4.6

mixed · hybrid

Free (user pays LLM API costs)

Sourcegraph

AI coding assistant with deep codebase search integration, capable of understanding and generating code across entire large-scale repositories using Sourcegraph's search infrastructure.

Default model: Claude Sonnet 4.6

mixed · hybrid

Free: Free · Pro: $9/mo · Enterprise Starter: $19/mo · Enterprise: $59/mo — Free tier; Pro at $9/mo; Enterprise pricing

TabbyML

Open-source, self-hosted AI coding assistant for code completion, chat, and private on-premises development workflows across common IDEs.

user owned · self hosted

Free and open source; Enterprise plans available

Tabnine

AI code completion and chat assistant that runs locally or in the cloud, with a focus on enterprise privacy, security compliance, and learning from private codebases.

mixed · hybrid

Code Assistant: $59/mo · Agentic Platform — Code Assistant at $59/user/mo; Agentic Platform enterprise pricing

Codeium

Agentic IDE with a 'Cascade' agent that maintains awareness of the full development flow and can autonomously plan and execute multi-step coding tasks.

Default model: Claude Sonnet 4.6

mixed · hybrid

Free: Free · Pro: $20/mo · Max: $200/mo · Teams: $40/mo · … — Freemium; Pro at $20/mo

Zed Industries

High-performance collaborative code editor with native AI agent integration, built in Rust for speed and designed for human-AI collaboration workflows.

Default model: Claude Sonnet 4.6

user owned · local

Free: Free · Pro: $10/mo · Enterprise — Free; Pro tier for advanced AI features

Paul Gauthier (independent)

Open-source CLI tool for AI-driven code editing via natural language, with deep Git integration that automatically commits changes with descriptive messages.

Default model: Claude Sonnet 4.6

user owned · local

Free / Open Source: Free — Free (user pays LLM API costs)

Sourcegraph (separate product)

AI coding agent terminal tool designed for autonomous multi-step task execution across codebases, positioned as a next-generation CLI harness.

Default model: Claude Opus 4.7

mixed · local

Free beta

Anthropic

Autonomous coding agent that runs in the terminal, capable of editing files, running commands, and managing the entire development workflow with minimal human intervention.

Default model: Claude Sonnet 4.6

user owned · local

Pro: $20/mo · Max 5x: $100/mo · Max 20x: $200/mo · Team: $25/mo · … — Included with Claude Pro ($20/mo), Max 5x ($100/mo), or Max 20x ($200/mo) subscription; API usage billed separately

Google

Google open-source command-line AI agent that uses a ReAct loop, local tools, and MCP servers to fix bugs, create features, improve tests, and handle developer workflows.

user owned · hybrid

Free access through Gemini Code Assist for individuals; paid Google Cloud and enterprise usage available

Block (Square parent company)

Open-source autonomous AI coding agent by Block that runs locally, with extensible tool support for filesystem, shell, and external APIs.

user owned · local

Free (user pays LLM API costs)

Xiaomi MiMo

Open-source terminal-native AI coding agent from Xiaomi MiMo that reads and writes code, runs commands, manages Git, maintains persistent project memory, and supports custom LLM providers.

Default model: Xiaomi MiMo-V2.5-Pro

user owned · hybrid

Free and open source; MiMo Auto is free for a limited time, or bring your own LLM provider API key

Mistral AI

Open-source coding agent from Mistral that runs in the terminal, VS Code, JetBrains, Zed, or remote Vibe Code web sessions with file, shell, and pull request workflows.

Default model: Mistral Medium 3.5

mixed · hybrid

Free: Free · Pro: $14.99/mo · Team: $24.99/mo · Enterprise — Free limited access; Pro at $14.99/mo; Team at $24.99/user/mo

Open Interpreter

Open-source desktop and terminal agent that lets language models run code locally and operate documents, files, browser tasks, and computer workflows under user control.

user owned · local

Free and open source; user pays configured model or hosted-service costs

OpenAI

Open-source command-line coding agent released April 2025 that runs code, browses files, and executes multi-step tasks in a sandboxed environment using OpenAI models.

Default model: GPT-5.4

mixed · hybrid

Free: Free · ChatGPT Go: $8/mo · ChatGPT Plus: $20/mo · ChatGPT Pro: $200/mo · … — Free (user pays OpenAI API costs)

Anomaly

Open-source coding agent available as a terminal interface, desktop app, and IDE extension, with LSP context, parallel sessions, and multi-provider model support.

user owned · local

Free and open source; user pays model-provider costs or uses linked subscriptions where supported

earendil-works

Open-source Pi Agent Harness with a minimal four-tool coding-agent core (Read, Write, Edit, Bash) that self-extends at runtime. Includes coding agent CLI, unified LLM API, TUI/web UI, and Slack/chat automation packages.

user owned · local

Free and open source; bring your own LLM API keys or supported subscriptions

Plandex

Open-source CLI coding agent designed for large-scale, multi-step tasks with explicit planning stages and reliable multi-file changes across large codebases.

user owned · hybrid

Free (self-hosted); Cloud plan available

Warp

AI-native terminal and coding environment with built-in agent capabilities for running commands, debugging, and completing coding tasks via natural language.

user owned · local

Free: Free · Build: $20/mo · Business: $50/mo · Enterprise — Freemium; Pro at $15/mo

Amazon Web Services

AI coding assistant and agent deeply integrated with AWS services, capable of autonomous feature implementation, test generation, and security scanning.

vendor managed · vendor cloud

Free: Free · Pro: $19/mo — Free tier; Pro at $19/user/mo

OpenAI

ChatGPT mode that combines browser, terminal, connectors, files, and API tools so it can research, navigate websites, edit spreadsheets, create slides, and complete online tasks with user approvals.

vendor managed · vendor cloud

Available in ChatGPT Plus, Pro, Business, Enterprise, and eligible plans

Cofounder

AI company operating system for founders that coordinates engineering, sales, marketing, design, finance, and operations agents from a roadmap and company context.

vendor managed · vendor cloud

Paid plans; pricing varies by product tier

Microsoft

Microsoft 365 Copilot agent surface for delegating work across Outlook, Teams, Excel, documents, calendar, and enterprise workflows with user approval before actions.

vendor managed · vendor cloud

Requires eligible Microsoft 365 Copilot plans

Cognition Labs

Cloud-based autonomous AI software engineer that works in a sandboxed environment with a browser, terminal, and code editor to complete full engineering tasks.

vendor managed · vendor cloud

Starter: Free · Pro: $30/mo · Core: $20/mo · Team: $500/mo · … — Free Starter; Core at $20/mo, Pro at $30/mo; Team at $500/mo

Google

Google Gemini personal AI agent for 24/7 background tasks that can navigate digital-life workflows under user direction and request approval before major actions.

vendor managed · vendor cloud

Gemini app availability and plan limits vary by region and subscription tier

GitHub (Microsoft)

Cloud-based development environment that uses AI to go from GitHub issue to working implementation, handling planning, code changes, and test execution.

vendor managed · vendor cloud

Included with GitHub Copilot subscription (~$10-19/mo)

Gumloop

AI agent builder for workplace automation that lets teams assemble agents and workflows over apps, documents, and model providers with IT controls.

vendor managed · vendor cloud

Freemium; paid team and enterprise plans

Google DeepMind

Experimental async AI coding agent from Google that handles GitHub issues autonomously in the background, producing pull requests without blocking developers.

Default model: Gemini 3 Pro

vendor managed · vendor cloud

Free: Free · AI Pro: $19.99/mo · AI Ultra: $124.99/mo — Free beta (Google One AI Premium subscribers)

Lindy AI

AI executive assistant and agent platform for managing inboxes, meetings, calendars, recruiting, sales, support, and recurring business operations across connected apps.

vendor managed · vendor cloud

Free trial; paid plans available

Perplexity

Perplexity agentic assistant that uses a computer to complete tasks such as browser automation, recurring monitoring, form filling, travel, and parallel research workflows.

vendor managed · vendor cloud

Available to Pro and Max subscribers

Relay.app

AI workflow automation platform for building agents and multi-step business workflows across hundreds of apps with natural-language setup and human approval steps.

vendor managed · vendor cloud

Free plan; Professional from $19/mo billed annually

Anthropic

Agentic AI system for knowledge work running on desktop with file access, task scheduling, and multi-step task execution.

Default model: Claude Opus 4.6

mixed · hybrid

Pro: $20/mo · Max 5x: $100/mo · Max 20x: $200/mo

Eigent AI

Open-source desktop multi-agent workforce for browser and desktop automation, enterprise-system work, research, and report generation using local context and connectors.

user owned · local

Free and open source; enterprise offerings available

OpenClaw

Open-source personal AI assistant that runs on user devices and coordinates tasks across chat channels, voice, calendar, email, apps, and skill-based automations.

user owned · hybrid

Free and open source; user pays model and infrastructure costs

OpenWork Labs

Open-source desktop app for doing knowledge work with AI agents on local files, built on OpenCode and positioned as an open alternative to Claude Cowork and Codex.

user owned · local

Free and open source; user pays model-provider costs

All Hands AI

Open-source platform for software-development agents that write code, browse the web, run commands, and work in sandboxed environments locally or in the cloud.

mixed · hybrid

Free and open source; All Hands AI cloud offerings available

Princeton NLP Group

Research framework and agent for automated software engineering that interfaces AI models with code repositories using custom terminal-like tools.

user owned · self hosted

Free (user pays LLM API costs)