Best AI tools for coding
37 reviewed tools, 21 with a free plan. Ordered by real popularity.
Last updated:
1. Bolt
Bolt builds apps, websites, and prototypes from AI chats. It writes, tests, and refines code, with integrated hosting, databases, authentication, and templates to help turn ideas into live products.
Free + paid plansFree planbolt.new
2. Cursor
Cursor helps developers delegate coding tasks to AI agents in an IDE, terminal, or cloud. Agents can build and test features in parallel, collaborate in Slack, and review GitHub pull requests.
Free + paid plansFree plancursor.com
3. GitHub Copilot
GitHub Copilot helps write and understand code, run parallel agent tasks, automate recurring work, and review changes for quality and security. It carries repository context across the desktop app, CLI, editors, web, and mobile.
Free + paid plansFree plangithub.com
4. Replit
Replit uses AI to turn natural-language requests into apps and websites. It combines code generation, visual design, publishing, and built-in authentication, databases, hosting, and monitoring, with over 100 integrations.
Free + paid plansFree planreplit.com
5. v0
v0 turns prompts into full-stack web apps with AI. It offers templates, visual editing, reusable design systems, GitHub syncing, database connections, and one-click deployment to Vercel, plus an iOS app for building on the go.
Free + paid plansFree planv0.dev
6. Windsurf
Windsurf, now called Devin Desktop, combines an IDE with tools to manage multiple coding agents. It supports local and cloud sessions, code completion, codebase context, and integrated code review.
Free + paid plansFree planwindsurf.com
7. AI/ML API
AI/ML API brings text, image, video and audio models together with agent tools under one API key and bill. It offers model routing, MCP connections, a Python SDK and usage-based pricing with a free playground tier.
Free + paid plansFree planaimlapi.com
8. AI2sql
AI2SQL generates SQL from natural-language requests using your database schema. It can explain, fix, format and optimize queries, run them read-only, and connect to AI agents through REST API and MCP.
Free + paid plansFree planwww.ai2sql.io
9. Calmo
Calmo uses AI agents to investigate alerts, validate root-cause hypotheses in parallel, and generate remediation plans. It connects code, infrastructure, and telemetry, turning investigations into searchable team knowledge.
10. Capacity
Capacity builds and hosts apps from plain-language requests, with pages, databases, logins and payments. Refine apps through chat, connect a custom domain and export your code. Build using its agent or connect Claude or ChatGPT.
Paidcapacity.so
11. Claude Code
Claude Code explores codebases, fixes bugs, writes features, runs tests, and handles lengthy refactors and migrations. Developers can direct and review its work from terminals, IDEs, the web, mobile apps, or Slack.
Paidcode.claude.com
12. Code to Flow
Code to Flow uses AI to turn code into editable flowcharts, sequence diagrams, class diagrams, and user journeys. It explains code and exports diagrams as PNG, SVG, or PDF. The free tier allows three flowcharts daily.
Free + paid plansFree plancodetoflow.com
13. Codeflash
Codeflash optimizes Python performance using an autonomous agent that benchmarks changes, checks correctness, and delivers reviewable pull requests. It supports continuous optimization and offers expert-reviewed performance engineering engagements.
Free + paid plansFree planwww.codeflash.ai
14. CodeRabbit
CodeRabbit automates code reviews, prioritizes pull requests, explains changes, and monitors security risks. It learns from team feedback and offers fixes, pre-merge checks, and workflow automation across PRs, CLI, IDE, and Slack.
Paidcoderabbit.ai
15. CodiumAI
Qodo reviews code in pull requests and IDEs using context from repositories, review history, and requirements. It detects bugs, enforces team standards, and tracks quality risks across repositories.
Paidwww.codium.ai
16. Devin
Devin is an autonomous software engineering assistant that plans tasks, writes and tests code, reviews pull requests, and fixes bugs. It supports cloud agents, desktop and CLI workflows, plus automated maintenance and Slack or Teams collaboration.
Free + paid plansFree plandevin.ai
17. Gemini by Example
Gemini by Example offers hands-on, annotated Python examples for Google's Gemini SDK and API, covering text, images, audio, video, document processing, tool use, and token management.
18. GoCodeo
GoCodeo is an AI agent for VS Code that generates code, explains projects, creates and runs tests, and helps debug issues. It supports Git workflows, MCP tool integrations, Supabase setup, and Vercel deployment.
Free + paid plansFree planwww.gocodeo.com
19. Havoptic
Havoptic tracks AI coding tool releases and changelogs through daily automated updates. It also offers tool comparisons, weekly digests, in-depth analysis, downloadable JSON release data, and API documentation.
20. HeyTensor
HeyTensor is a free browser calculator for 14 PyTorch and TensorFlow layer types. Trace shapes across layers, inspect formulas and parameter counts, and paste PyTorch errors for suggested fixes. Calculations stay in your browser.
Free + paid plansFree planheytensor.com
21. Jupyter Widgets official documentation
Jupyter Widgets provides interactive controls for Jupyter notebooks, including sliders, text inputs, tabs, and grids. Its framework supports custom widgets and embedding interactive objects in webpages.
22. Kilo
Kilo is an MIT-licensed AI coding agent for writing, planning, debugging, and reviewing code across IDEs, terminal, desktop, and cloud. It supports 500+ models, local models, and your own provider keys, with free individual access and paid team plans.
Open sourceFree plankilo.ai
23. Kilo Code
Kilo Code helps developers write, plan, debug, and review code with open-source AI agents across IDEs, terminal, desktop, and cloud. It supports 500+ models, local models, and your own provider keys, with optional paid team features.
Open sourceFree plankilocode.ai
24. LLM
LLM offers a command-line tool and Python library for local and remote language models. Run prompts and chats, log results in SQLite, create embeddings, extract structured data, and extend capabilities with plugins and tools.
25. Mastra
Mastra is an open-source TypeScript framework for AI agents and apps, with workflows, persistent memory, evaluation, and observability. Run projects on your own infrastructure or deploy them to Mastra Cloud.
Open sourceFree planmastra.ai
26. Metabob
Metabob analyzes code alongside AI coding agents to detect security weaknesses, runtime issues, logic flaws, and regressions as code changes. It evaluates project-wide patterns and code history to guide safer implementations.
Paidmetabob.com
27. Model Context Protocol
MCP is an open-source protocol that connects AI applications to external data, tools, and workflows. Developers can build servers to expose resources and clients that use them, helping AI assistants retrieve information and take actions.
Open sourcemodelcontextprotocol.io
28. OpenCode
OpenCode helps you write and run code using AI models in a terminal, IDE, desktop app, or web app. It supports parallel agents, local models, and 75+ model providers, with free models included and optional paid model subscriptions.
Open sourceFree planopencode.ai
29. Potpie
Potpie connects code, tickets and documentation in a living context graph that powers AI agents for debugging, specifications, testing and impact analysis. It runs in your VPC or on-premises, with engineers helping deploy and refine workflows.
Open sourcepotpie.ai
30. Qodo
Qodo reviews code in pull requests, IDEs, and agent workflows using context across repositories. It detects bugs, enforces team standards, and tracks quality risks. Paid plans follow a 14-day trial; qualified open source projects can apply for free access.
Paidwww.qodo.ai
31. REA (Reverse Engineer Anything)
REA equips coding agents to inspect software code and runtime behavior, explain features, and reconstruct their logic. It also turns recorded web app sessions into local environments for training and testing AI agents.
Open sourcerea.tools
32. Rosebud AI
Rosebud AI builds playable 2D and 3D games from text prompts, generating code, art and audio. Refine games through chat, remix others' projects and share browser links. Paid plans add private projects, commercial rights and code export.
Free + paid plansFree planrosebud.ai
33. StartKit.AI
StartKit.AI provides a Node.js boilerplate with AI REST endpoints, document retrieval, authentication, payments, usage monitoring, and React demos. A one-time purchase includes the full codebase and one year of updates.
Paidstartkit.ai
34. Startups - @builtwithgenai
Airtable helps teams build no-code apps, connect business data, automate workflows, and deploy AI agents. It includes custom interfaces, reporting, integrations, and access controls for collaboration at enterprise scale.
Free + paid plansFree planairtable.com
35. Taskade
Taskade creates no-code business apps from prompts and connects them to projects, AI agents, and automated workflows. It includes hosted apps, reusable templates, shared workspaces, and integrations with over 100 tools.
Free + paid plansFree planwww.taskade.com
36. unpkg.ai
unpkg.ai turns URL prompts into importable JavaScript ES modules using LLMs. It requires no signup or API keys, caches generated modules permanently, and offers model selection and seeds for deterministic output.
37. ZZZ Code AI
ZZZ Code AI is a free coding website with AI tools for generating, converting, explaining, reviewing, refactoring, and documenting code. It also answers programming questions and detects bugs, with specialized tools for Dapper and EF Core.
Freezzzcode.ai
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