13 Free AI Coding Assistant Tools in 2023-24 (Free & Paid)


AI coding assistants are software tools that leverage artificial intelligence to help developers write code faster and with fewer errors. These tools use machine learning models trained on large datasets of code to provide intelligent suggestions, autocompletion, error checking, and more as developers type code.

AI coding assistants have exploded in popularity recently, thanks to impressive new capabilities enabled by advances in AI. Leading tech companies like Google, Microsoft, and OpenAI have all introduced developer-focused AI tools. At the same time, a number of startups now offer smart coding assistants.

These AI coding tools boost developer productivity by reducing repetitive tasks and manual work. They allow coders to focus on higher value and more creative aspects of software development. AI assistants also aid new developers in learning how to code by providing real-time feedback and explanations.

Understanding AI Coding Assistants and Their Importance

AI coding assistants utilize machine learning models to analyze code context and make intelligent recommendations. Most systems are powered by transformer language models – a type of deep neural network architecture that has driven recent breakthroughs in natural language processing.

These models are trained on huge corpuses of open source code from GitHub and other sources. By “reading” millions of lines of real-world code, the models learn the patterns and conventions that human developers use. The models can then apply that knowledge to make coding suggestions for new projects.

This training process allows the AI assistants to provide useful autocompletions and error checking even for complex code. Rather than just memorizing common snippets, the models develop an understanding of how code works to make appropriate recommendations.

AI coding tools are important because they directly address critical pain points for developers. Coding remains an extremely time-intensive process, and developers waste significant time on rote tasks. AI assistants handle these repetitive jobs to boost productivity.

These tools also reduce simple errors that can be time consuming to catch and fix manually. And for new developers, AI assistants provide feedback and explanations that accelerate the learning process.

Overview of the Top AI Coding Assistant Tools

There is now a wide range of AI coding assistants available from both large tech firms and startups. Leading options include:

  • GitHub Copilot – Code suggestions inside development environments like VS Code
  • Tabnine – Intelligent autocomplete for many programming languages
  • Codex – API for code generation from natural language
  • Kite – Contextual autocomplete, documentation, and code insights
  • CodeWhisperer – AWS service for generating code from comments
  • GitAI – Inline code suggestions powered by Codex API

These tools and others provide capabilities like autocompletion, error checking, and refactoring assistance. Some work inside the code editor, while cloud APIs allow integrating AI coding into any application.

Most assistants support multiple programming languages. Python, JavaScript, Java, C#, and Go tend to have the best support currently.

In the rest of this guide, we analyze 13 of the top AI coding assistants available today. We explore the key features and capabilities of each tool along with pricing options.

Deep Dive Into 13 Best AI Coding Assistant Tools in 2023


CodePal is an AI pair programmer designed by Anthropic to boost developer productivity. As you write code, CodePal provides intelligent suggestions and explanations to help you work faster with fewer errors.

CodePal utilizes a conversational interface so developers can describe desired functionality in plain English. The assistant is powered by Claude, Anthropic’s own Constitutional AI assistant focused on safety.

Key features include:

  • Conversational code suggestions
  • Detects bugs and suggests fixes
  • Provides context for each recommendation
  • Supports Python, JavaScript, TypeScript, React, SQL, and more

CodePal emphasizes transparency and control compared to other coding assistants. It allows developers to view model confidence scores and reject unwanted suggestions.

The tool is currently free for individual developers. Paid plans may be introduced later that add features for enterprise usage.

Google Cloud AI Products

Google Cloud offers a suite of AI-powered products to boost developer productivity, including:

  • Code Completion – Machine learning code completion for Google’s Cloud Code editor
  • Assist – Contextual help for Google Cloud API usage inside the editor
  • Documentation Insights – Relevant code snippet suggestions as you read documentation

These capabilities help developers build cloud-based applications by providing intelligent recommendations tailored to Google’s platform.

The Completion and Assist feature integrate directly into Cloud Code, Google’s IDE for writing cloud apps. Documentation Insights works alongside any cloud documentation.

As these tools are part of Google Cloud, there are no direct costs associated. Users pay only for the underlying Google Cloud resources used by their applications.

GitHub Copilot

GitHub Copilot

GitHub Copilot is an AI pair programmer developed by GitHub. It suggests entire lines and blocks of code inside development environments like Visual Studio Code, Neovim and JetBrains IDEs.

Copilot is powered by Codex, OpenAI’s general purpose code generation model. The system achieves a very high level of fluency with natural code completions for a wide variety of frameworks and languages.

Key features include:

  • Code suggestions adapted to development context
  • Supports dozens of languages and frameworks
  • Highly fluent code generation capability
  • Integrates seamlessly into existing workflows

GitHub prices Copilot based on number of users. Individual developers can access the tool for $10 per month. Enterprise plans are also available if purchased through GitHub Enterprise Cloud or GitHub Enterprise Server.



Tabnine is an AI code completion tool designed to help developers write code faster. It uses deep learning to suggest entire lines of code based on a statistical analysis of public code repositories.

The tool plugs directly into code editors like VS Code, Vim and Sublime Text. It then provides autocomplete suggestions in real-time as developers type. This eliminates lots of tedious typing.

Key features include:

  • Intelligent code completions
  • Identifies bugs and suggests fixes
  • Supports most programming languages
  • Seamlessly integrates with all major code editors

Tabnine offers both free and paid tiers. The free version has unlimited use for public GitHub repositories. Paid plans start at $29 per month and add features like private repo analysis.


Replit is an online IDE with built-in AI coding assistance features. Its AI capabilities index public code to provide intelligent autocomplete, error detection, and fix suggestions.

Developers can use Replit for

Replit is an online IDE with built-in AI coding assistance features. Its AI capabilities index public code to provide intelligent autocomplete, error detection, and fix suggestions.

Developers can use Replit for writing, running, and collaborating on code. The AI assistant integrates directly into this workflow to boost productivity.

Key features include:

  • Intelligent autocompletion
  • Detects errors and suggests fixes
  • Supports 50+ languages
  • Online IDE for coding, debugging, and collaboration

Replit offers a free tier with AI assistance features included. Paid plans start at $7 per month and add more cloud compute resources and storage for running larger projects.


Kite is an AI-powered autocomplete for Python developers. It integrates directly into all major coding environments to provide real-time suggestions and documentation.

The tool draws on a vast dataset of open source Python code to deliver useful recommendations in context. It also connects to official Python documentation to surface relevant help info as needed.

Key features include:

  • Intelligent Python autocompletions
  • In-editor documentation
  • Error detection with fixes
  • Powerful Python language models

Kite offers a robust free tier so Python developers can access core assistance features without cost. Paid plans start at $10 per month and include additional capabilities like enterprise authentication.



IntelliCode by Microsoft is an AI-assisted development tool for Visual Studio. It provides intelligent suggestions, completions, and style rule enforcement to improve coding efficiency.

The tool integrates directly into the Visual Studio IDE on Windows and Mac. It then analyzes context and usage to provide personalized recommendations as you code.

Key features include:

  • AI-powered completions
  • Contextual IntelliSense recommendations
  • Enforces style rules and conventions
  • Focused on Microsoft languages like C#, TypeScript, and more

IntelliCode comes bundled with Visual Studio at no additional cost. It can be a helpful tool for developers using Microsoft’s IDE and languages.



DeepCode is an AI-powered code review assistant. It integrates with GitHub pull requests to provide real-time feedback and suggestions during code review.

The tool uses machine learning models trained on a large corpus of open source code. It identifies potential issues like security vulnerabilities, performance problems, and style inconsistencies.

Key features include:

  • AI-assisted code reviews
  • Security, performance, and style analysis
  • GitHub integration
  • Supports 10+ languages

DeepCode offers a robust free tier for public GitHub repositories. Paid plans start at $15 per month and add private repo analysis along with team management capabilities.



SourceAI is an AI assistant for software development teams. It integrates with tools like Jira, GitHub, and Slack to provide productivity enhancements.

Developers can leverage SourceAI for code search, documentation, code generation, and code review. The tool aims to become a centralized hub for developer workflows.

Key features include:

  • Code search across repositories
  • Automatic documentation
  • Code generation and review
  • Integrates with developer tools

SourceAI offers a free trial. Paid plans start at $25 per user per month. Volume discounts are available for larger teams.



CoPilot by Robocorp is an open-source alternative to GitHub Copilot. It suggests completions and entire lines of code based on statistical analysis of

public code repositories.

The tool plugs into code editors like VS Code to provide real-time suggestions as developers type. It aims to offer seamless autocompletions to boost productivity.

Key features include:

  • Intelligent code completions
  • Low resource consumption
  • Open source transparency
  • Community driven development

As an open source project, CoPilot is free for anyone to use or contribute to. Developers can access full capabilities without any cost.


Humaans is an AI assistant for software developers and testers. It aims to automate many repetitive coding tasks to boost productivity.

The tool integrates with IDEs and code hosts to provide capabilities like test case generation, code analysis, documentation, and code completion. It leverages both rule-based and machine learning techniques.

Key features include:

  • Test case creation
  • Code analysis and metrics
  • Documentation generation
  • Intelligent code completion

Humaans offers a free trial period. Paid plans start at $15 per user per month, with discounts available for annual subscriptions.



GitDuck is an AI assistant tool for developers using Git and GitHub. It aims to simplify common workflows like code search, documentation, and code generation.

Developers can query GitDuck in natural language via chat or IDE plugins. The tool provides conversational access to information spread across repositories and code hosts.

Key features include:

  • Natural language code search
  • Automatic code documentation
  • Code generation capabilities
  • Integrates with Git, GitHub, Slack, and more

GitDuck offers a free trial period. Paid access starts at $15 per user per month. Volume discounts are available.


GitSense is an AI-powered development assistant for engineering teams. It aims to make developers more productive by enhancing existing workflows.

The tool plugs into the IDE to provide coding assistance, including autocompletions, documentation, and code analysis. It also connects broader workflows via integrations with tools like Jira, GitHub, and Slack.

Key features include:

  • Intelligent coding assistance
  • Two-way integration with other tools
  • Code analysis and metrics
  • Team onboarding and training

GitSense offers a free trial period. Paid plans start at $15 per active user per month. Discounts are available for annual subscriptions.

Comparative Analysis of AI Coding Assistant Tools

Comparing Features and Usability

The coding assistants profiled excel at core capabilities like autocompletion, documentation, and error checking. However, the tools differentiate themselves in areas like supported languages, IDE integration, code generation fluency, and more.

Tools like GitHub Copilot, TabNine

GitHub Copilot, TabNine, and Codex stand out for their advanced code generation abilities. They can produce complete function definitions, class boilerplate, and entire modules from comments or function signatures. This makes them extremely useful for quick prototyping and draft generation.

Assistants like Kite, Sourcegraph Cody, and IntelliCode offer tighter IDE integration and richer contextual recommendations. By connecting directly into editors like VS Code, they enable a more seamless coding experience.

Tools like CodePal, Replit, and GitDuck excel at conversational interfaces. Developers can query these assistants via chat to get plain English explanations of code, generate new functions, or search across codebases.

Overall, GitHub Copilot leads in terms of general coding fluency thanks to Codex foundations. TabNine offers computational efficiency – its models run locally for lightning fast predictions. And CodePal stands out for its emphasis on transparency and control.

Comparing Pricing and Value for Money

Pricing varies widely across AI coding assistants profiled:

  • Free tiers – Tabnine, Replit, IntelliCode, CoPilot
  • $10-15/mo individual rates – GitHub Copilot, Kite, DeepCode
  • $25+/mo enterprise rates – SourceAI, GitDuck, GitSense

Free tools offer solid autocomplete and documentation capabilities, providing good baseline productivity value. GitHub Copilot and Kite offer leading code generation for fair individual pricing.

For teams, SourceAI, GitDuck, and GitSense provide code search, documentation, analysis and monitoring for reasonable per user rates. Volume discounts can make these even more affordable.

Overall GitHub Copilot stands out as a balanced option – its advanced AI capabilities justify a very competitive $10 monthly subscription for individuals.

Comparing Efficiency and Performance

Efficiency is critical for coding assistants – laggy or resource intensive tools lead to frustrating developer experiences. TabNine benchmarks well here, with its local models providing low latency predictions.

Cloud based options like GitHub Copilot counter this via language model optimization, caching, etc. And lighter weight assistants like IntelliCode and Kite take care not to overburden system resources.

Tools that integrate directly into IDEs tend to provide the smoothest experiences by avoiding context switches. VS Code and JetBrains IDEs surface assistants like GitHub Copilot, IntelliCode and Kite conveniently alongside editing workflows.

Conversational tools can incur some overhead from extra query/response cycles. However, assistants like CodePal and GitDuck mitigate this via fast response and seamless IDE plugins.

Comparing Customer Support

Coding assistants augment complex development workflows – without robust customer support, tool issues lead to blocked developers. Most assistants examined offer varying tiers of support:

  • Limited public forums – Open source options like CoPilot
  • Email/in-app support – Kite, DeepCode, Replit
  • Premium 24/7 service – TabNine priority support

DeepCode and Kite offer solid responsive assistance for everyday usage questions. For business critical issues, TabNine’s premium support delivers dedicated engineers for fast solutions.

Transparent development of open source assistants like CoPilot ensures community support and documentation. However, response times can vary.

Overall TabNine leads in guarantees for mission-critical scenarios. DeepCode and Kite follow in providing quality assistance for mainstream use cases.

Conclusion: Recap of the Best AI Coding Assistant Tools in 2023

Reflecting on the Top Picks

The AI coding assistants profiled represent an impressive range of emerging technologies empowering developers. After analysis, several options stand out from the pack:

  • GitHub Copilot – Leading code generation fluency and affordable pricing
  • TabNine – Lightning-fast predictions and premium support
  • CodePal – Conversational interface with transparency



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