If you're looking for a tool to figure out the time complexity of your code, TimeComplexity.ai is a good option. This code analysis tool, powered by the GPT-3.5 Turbo technology, can analyze the runtime complexity of programs in a variety of languages, including Python, C++, C, Java, JavaScript and Go. It has a tiered pricing system with an anonymous plan, an authenticated plan and a pro plan that costs $5 per month for unlimited queries. The service can handle incomplete code, and there's background information in blog posts about time complexity analysis and code optimization.
Another option is Figstack, an AI-powered coding assistant that also offers Explain Code, Language Translator, Docstring Writer and Time Complexity estimation using Big O notation. It's designed to help developers understand code others have written, translate code, automate documentation and optimize code for performance. You can try Figstack with a free trial before committing to a subscription plan.
Both Codeium and Codefy are powerful AI-powered coding assistants with a variety of features like code completion, documentation generation and bug fixing. Codeium supports more than 70 programming languages and integrates with major IDEs, and it has a tiered pricing system with a free plan for individuals and scalable plans for teams and enterprises. Codefy offers a Flow Editor, Concise Comments and Test Cases, and its pricing tiers range from free to professional plans.