Best Second Mate Alternatives & Competitors in 2025

Amazon CodeWhisperer is a machine learning (ML)–powered service that helps improve developer productivity by generating code recommendations based on their comments in natural language and code in the integrated development environment (IDE).

Open Source

TabNine is the all-language autocompleter. We use deep learning to help you write code faster.

Open Source

Flagsmith lets you manage feature flags and remote config across web, mobile and server side applications. Deliver true Continuous Integration. Get builds out faster. Control who has access to new features. We're Open Source.

Try for free Open Source freemium

An open source alternative to GitHub Copilot

Your AI pair programmer. With GitHub Copilot, get suggestions for whole lines or entire functions right inside your editor.

Kite helps you write code faster by bringing the web's programming knowledge into your editor.

Open Source

Visual Studio IntelliCode is an experimental set of AI-assisted development capabilities for next-generation developer productivity.

Sublime Text is a sophisticated text editor for code, html and prose - any kind of text file. You'll love the slick user interface and extraordinary features. Fully customizable with macros, and syntax highlighting for most major languages.

Open Source

Free AI-powered code completion for *everyone*, *everywhere*

Open Source

AI that writes the code for you

GPT-Code-Clippy (GPT-CC) is an open source version of GitHub Copilot, a language model -- based on GPT-3, called GPT-Codex -- that is fine-tuned on publicly available code from GitHub.

Flagsmith lets you manage feature flags and remote config across web, mobile and server side applications. Deliver true Continuous Integration. Get builds out faster. Control who has access to new features. We're Open Source.

Try for free Open Source freemium

Get an instant answer to your medical questions.

See what your code is doing wrong, as you code, in the IDE

Open Source