AI tools that died in 2021

Figstack aids developers in understanding and documenting code efficiently. The product has since been folded into Mintlify; visitors to the original URL are now redirected to mintlify.com.

Acquired by Mintlify.

Enterprise conversational-AI platform (A.ware) from Bangalore. Fractal took a majority stake in August 2021; the standalone senseforth.ai site went dark by 2026 as the business folded into Fractal's portfolio.

Acquired by Fractal.

Kira Systems was a pioneer in machine-learning contract analysis — extracting and reviewing clauses across large document sets for law firms and corporate legal teams. In 2021 it was acquired by Litera, the legal-technology company, which continues to offer Kira’s contract-analysis technology within its transaction and litigation product suite.

Acquired by Litera.

Dropbox announced its agreement to acquire DocSend for $165M on 9 March 2021 and completed the deal on 22 March 2021. DocSend still runs as a distinct product with its own pricing and billing rather than a Dropbox feature, and a Dropbox subscription does not include it. Development since has leaned toward integration and data-room work, including a diligence tracker added in 2026.

Acquired by Dropbox.

ROSS Intelligence, founded in 2014 out of the University of Toronto, was an AI legal-research engine that let lawyers ask questions in plain English and get cited case law, taking on Westlaw and LexisNexis. In 2020 Thomson Reuters sued it for training on Westlaw headnotes; unable to fund the litigation, ROSS shut down on January 31, 2021. In February 2025 a federal judge ruled it had infringed Westlaw's copyrights, a landmark AI training-data decision.

Last known pricing: Per-attorney subscription (historical)