Grammarly

 ( Official Website ) 

By 2015, Grammarly had one million active daily users. That same year, it began offering its flagship product via a freemium model that allowed all users access to the product's basic capabilities while placing more sophisticated features like style recommendations and plagiarism detection behind a paywall. It also launched a browser extension for Google Chrome, Safari, and Firefox, as well as an add-on for Google Docs.

In 2017, Grammarly raised $110 million in its first funding round.

In 2019, Grammarly added a tone detector to its writing assistant. This tool uses set rules and machine-learning to help users gauge the character of their writing and tailor it to a particular audience. That same year, the company held a second funding round, raising $90 million. In 2020, Grammarly made its first investment in an outside company, participating in a $10 million funding round for Docugami, a company working on AI-driven document generation. In 2021, Grammarly raised another $200 million, at a total valuation of $13 billion, via its third funding round. By this point, Grammarly had approximately 30 million users.

Following the 2022 Russian invasion of Ukraine, Grammarly ceased all business operations in Russia and Belarus. The company also announced that it would donate all the net revenue it had earned in Russia and Belarus since 2014, about $5 million, to Ukrainian humanitarian groups. Additionally, the company paid the salaries of Ukrainians who left their jobs at Grammarly to join the nation's army and made its product free for Ukrainian journalists publishing news about the war in English.

In April 2023, Grammarly launched a product using generative AI built on the GPT-3 large language models. The software can generate and rewrite content based on prompts. It can also generate topic ideas and outlines for written content such as blog posts and academic essays. It has been trained on an anonymized library of business writing and is capable of suggesting clarifying edits and additions to work communications such as emails and chat messages. In September 2024, Grammarly announced the release of its Authorship tool, which attempts to identify the original source of a passage of text. It then designates the passage as written by the text's author, lifted from another source, or generated by AI. It is not clear to what extent such tools work.

In July 2024, Grammarly donated approximately $500,000 to help rebuild Okhmatdyt children's hospital after the building was damaged by a Russian missile strike.

In December 2024, Grammarly announced that it was acquiring the productivity startup Coda. As part of the deal, Coda CEO Shishir Mehrotra replaced Rahul Roy-Chowdhury as Grammarly's CEO.

In May 2025, Grammarly announced it raised $1 billion in nondilutive funding from General Catalyst.

In July 2025, Grammarly announced that it was acquiring the email client Superhuman.

Documents whose contents have been corrected via Grammarly have occasionally been accused by detection engines such as Turnitin of being partially or entirely AI-generated. Schools are struggling to develop rules about its use that are consistent and fair, with some teachers recommending Grammarly to all of their students and others rejecting it.