3 AI tools that shut down, were acquired, or had their domains lapse in 2021. Curated by ToolDirectory.AI editorial.

AI tools that died in 2021 — AI Graveyard | ToolDirectory.AI

## Figstack: Supercharging Code Interpretation and Documentation

Figstack is a revolutionary tool designed to assist developers in navigating the complexities of coding. With the rapid evolution of programming languages and the intricacies involved in understanding and writing code, Figstack emerges as a beacon of clarity. It is not just another coding tool; it is an intelligent companion that simplifies the coding process.

### Key Features:

- Code Explanation: Struggling with a piece of code? Figstack's Explain Code function deciphers it for you in plain language.
- Language Translation: Seamlessly convert between programming languages, such as Python to Go or Ruby to Javascript.
- Automated Documentation: Let Figstack's Docstring Writer automatically generate detailed docstrings, ensuring your functions remain clear and maintainable.
- Time Complexity Analysis: Assess the efficiency of your code with the Time Complexity function, presented in Big O notation.

### Ideal Use Case:

Developers, both novice and experienced, can benefit immensely from Figstack. Whether it's understanding a complex piece of code, translating between languages, or generating documentation, Figstack is the go-to solution.

### Why use Figstack:

- Efficient Code Interpretation: No more hours spent trying to decipher code. Figstack does it in moments.
- Language Flexibility: Transition between languages without the usual hassle.
- Documentation Ease: Keep your codebase clean and understandable without the manual effort.
- Performance Analysis: Understand the efficiency of your code and find areas of optimization.

### tl;dr:

Figstack is an AI-powered tool designed to simplify the coding process for developers. From explaining code in natural language to translating between programming languages and auto-generating documentation, Figstack is a must-have for every developer.

### FAQ

**Q: What is Figstack's purpose?**
A: Figstack aids developers in understanding and documenting code efficiently.

**Q: Is Figstack free?**
A: Pricing varies by plan. Visit the Figstack pricing page for current tiers and details.

**Q: What is Figstack's main use case?**
A: Figstack helps developers and engineering teams ship code faster with AI-powered coding, debugging, and review tools.

**Q: What can replace Figstack?**
A: Top alternatives to Figstack include GitHub Copilot, Cursor, and v0. See our directory for in-depth comparisons.

### Related

Looking for more options? Browse the [Developer Tools](/top-ai-categories/developer-tools) directory or read our [best AI coding tools](/best-ai-collections/best-ai-tools-for-coding-code-smarter-not-harder) listicle. Figstack is also tracked on [Crunchbase](https://www.crunchbase.com/organization/figstack).


thumbnail_1213-logo.png

1213-logo.png

Figstack

Figstack aids developers in understanding and documenting code efficiently.

## Optimize Legal Document Review with Kira Systems – AI-Powered Insights for Faster, More Accurate Analysis

Kira Systems is a leader in transforming legal document review with its AI-driven technology designed to enhance the accuracy and speed of contract analysis. By employing advanced machine learning algorithms, Kira Systems automates the extraction and analysis of critical information from contracts and other documents, helping legal professionals reduce review time and focus on higher-value work.

### Key Features:

- Automated Document Extraction: Efficiently extract key information from a wide range of documents.
- Machine Learning Accuracy: Continuously learn from interactions to improve the accuracy and relevance of data extraction.
- Pre-built Knowledge Models: Utilize over a thousand built-in models for quick setup and immediate analysis.
- Collaborative Tools: Facilitate teamwork with tools designed for sharing insights and managing review projects.
- Compliance and Risk Management: Identify potential risks and ensure compliance with regulations through detailed audits of contractual obligations.

### Ideal Use Case:

- Ideal for law firms, corporate legal departments, and consultancy agencies that handle a high volume of complex documents. Kira Systems is particularly beneficial in scenarios such as due diligence, compliance checks, and contract management where precision and efficiency are paramount.

### Why Use Kira Systems:

- Drastically cut down on document review times with automated data extraction.
- Improve the accuracy of contract analysis with AI-enhanced tools.
- Enhance risk detection and compliance management in contractual agreements.
- Enable better collaboration across legal teams with integrated project management features.
- Leverage extensive pre-built knowledge to get started quickly with minimal setup.

### tl;dr:

Kira Systems provides an innovative AI-driven platform for legal document analysis, offering powerful tools to enhance efficiency, accuracy, and collaboration in legal reviews, ensuring professionals can tackle large-scale projects with confidence and precision.

### FAQ

**Q: What is Kira Systems?**
A: Enhance legal document review with AI-powered insights.

**Q: What is Kira Systems's pricing?**
A: Pricing varies by plan. Visit the Kira Systems pricing page for current tiers and details.

**Q: Who is Kira Systems's ideal user?**
A: Kira Systems serves lawyers and legal ops teams working on AI-driven workflows.

**Q: What competes with Kira Systems?**
A: Top alternatives to Kira Systems include Harvey AI, Casetext, and Legora. Browse the directory for full feature comparisons across these tools.

### Related

Looking for more options? Browse the [Legal Assistant](/top-ai-categories/legal-assistant) directory or read our [best AI legal tools](/best-ai-collections/top-5-ai-legal-tools-transforming-the-industry) listicle. Kira Systems is also tracked on [Crunchbase](https://www.crunchbase.com/organization/kira-systems).


thumbnail_2832-logo.png

2832-logo.png

Kira Systems

Enhance legal document review with AI-powered insights.

## What happened to ROSS Intelligence

ROSS Intelligence was an AI-powered legal research platform that let attorneys ask questions in natural language and receive answers grounded in cited case law. Founded in 2014 out of the University of Toronto by Andrew Arruda, Jimoh Ovbiagele, and Pargles Dall'Oglio, it positioned itself as a faster, smarter challenger to incumbents Westlaw and LexisNexis.

### Key Features

- Natural-language legal questions instead of boolean search
- Answers returned with cited, on-point case law
- Continuously updated case-law coverage
- Built to compete directly with Westlaw and LexisNexis

### What happened

In May 2020, Thomson Reuters sued ROSS, alleging it had used Westlaw headnotes to train its system. ROSS could not fund a drawn-out copyright fight and shut down on January 31, 2021. The case continued without it: in February 2025 a federal judge in Delaware ruled ROSS had infringed Westlaw's copyrights and rejected its fair-use defense, making it a landmark decision for AI training data.

### FAQ

**Is ROSS Intelligence still available?** No. The company shut down on January 31, 2021, citing the cost of the Thomson Reuters litigation.

**Why did ROSS Intelligence shut down?** It could not afford to keep fighting a copyright lawsuit from Thomson Reuters over the use of Westlaw headnotes to train its AI.

**What are alternatives to ROSS Intelligence?** Westlaw, LexisNexis, Casetext, and newer tools like Harvey cover AI-assisted legal research.

### tl;dr

ROSS Intelligence was an AI legal-research startup that shut down in 2021 after Thomson Reuters sued it over Westlaw training data. A 2025 ruling found it infringed Westlaw's copyrights.

ROSS Intelligence wordmark logo for the AI legal research startup

small_ross-intelligence-logo.png

thumbnail_ross-intelligence-logo.png

ross-intelligence-logo.png

ROSS Intelligence

ROSS Intelligence was an AI legal-research engine that answered plain-English questions with cited case law.

AI tools that died in 2021

Figstack

Kira Systems

ROSS Intelligence

Sign up for our newsletter

Sign up for our newsletter

Explore

Latest collections

Policy