Grammarly vs OpenAI: Founders, CEOs and History
Grammarly was founded in 2009 by Max Lytvyn, Alex Shevchenko, Dmytro Lider and is led by Shishir Mehrotra. OpenAI was founded in 2015 by Sam Altman, Elon Musk, Greg Brockman and is led by Sam Altman.
Company facts
Founders
Grammarly
Max Lytvyn
Max Lytvyn co-founded Grammarly in 2009 with Alex Shevchenko and Dmytro Lider. The idea came from their MyDropBox work: helping people write well rather than catching plagiarism afterwards.
Alex Shevchenko
Alex Shevchenko co-founded Grammarly in 2009 and helped shape it as a product-led company built around a free tier. That approach scaled through the 2015 Chrome extension.
Dmytro Lider
Dmytro Lider co-founded Grammarly in 2009 and led early work on its language technology from Kyiv, where the company kept a large engineering presence.
OpenAI
Sam Altman
Sam Altman co-chaired OpenAI at its 2015 founding and became CEO in 2019. He negotiated the Microsoft partnership, oversaw the ChatGPT launch in 2022, survived the board's brief attempt to remove him in November 2023, and led the October 2025 recapitalization…
Elon Musk
Elon Musk was an early co-chair and funder of OpenAI and left its board in February 2018. He later founded rival xAI in 2023 and sued OpenAI, Sam Altman and Greg Brockman in 2024, arguing the company abandoned its nonprofit mission.
Greg Brockman
Greg Brockman left his role as Stripe CTO to co-found OpenAI in 2015 and serves as president.
Ilya Sutskever
Ilya Sutskever was OpenAI's chief scientist from 2015 to May 2024, overseeing work behind the GPT series and ChatGPT. He voted to remove Sam Altman in November 2023, then said he regretted it. After leaving OpenAI he co-founded Safe Superintelligence Inc.
CEOs and their tenures
Grammarly
- Brad Hoover2011–2023
Former Chief Executive Officer
Led Grammarly through its bootstrapped years, the 2015 free-extension launch, and funding rounds in 2017, 2019 and 2021.
Source - Rahul Roy-Chowdhury2023–2025
Chief Executive Officer
Former Google Chrome product lead; head of product at Grammarly before becoming CEO in May 2023, overseeing the launch of GrammarlyGO generative features.
Source - Shishir Mehrotra2025–present
Chief Executive Officer
Co-founder of Coda and former YouTube product executive; became CEO when Grammarly acquired Coda, led the Superhuman Mail deal, the Superhuman rebrand and the GPTZero agreement.
Source
OpenAI
- Greg Brockman2015–present
President and Co-founder
Former Stripe CTO; returned from a 2024 sabbatical and remains president.
Source - Mira Murati2018–2024
Chief Technology Officer and interim CEO (former)
Served as interim CEO for two days in November 2023; left OpenAI in 2024.
Source - Sam Altman2019–present
Chief Executive Officer
Co-founder and CEO who turned OpenAI from a research lab into a consumer and enterprise platform; briefly removed by the board in November 2023 and reinstated days later.
Source - Fidji Simo2025–2026
CEO of Applications (former)
Former Instacart CEO who ran ChatGPT and other applications; stepped down from the full-time role in July 2026 for health reasons and stayed on as an adviser.
Source - Vijaye Raji2025–present
CTO of Applications
Statsig founder who joined via the 2025 acquisition to head product engineering for ChatGPT and Codex.
Source
Timeline: Grammarly and OpenAI side by side
2009Grammarly
Grammarly Founded in Kyiv, Ukraine
Max Lytvyn, Alex Shevchenko, and Dmytro Lider founded Grammarly to help people communicate clearly in English.
2011Grammarly
Brad Hoover Becomes CEO
Brad Hoover, a former General Catalyst investor, became CEO; the company later based its headquarters in San Francisco while engineering stayed in Kyiv.
2015Grammarly
Launches Free Chrome Extension & Ignites Viral PLG Growth
Debuted the free Chrome browser extension, transforming Grammarly into an omnipresent consumer phenomenon.
2015OpenAI
OpenAI founded as a nonprofit
OpenAI launched in December 2015 as a nonprofit AI research lab.
2017Grammarly
$110M First Outside Funding Round Led by General Catalyst
After eight years of profitable bootstrapping, raised $110 million led by Hemant Taneja at General Catalyst.
2018Grammarly
Grammarly Business Expands Enterprise Offering
Grew its paid offering for corporate teams with admin, billing and style controls.
2019Grammarly
$90M Round at $1.0B+ Unicorn Valuation Led by General Catalyst
Achieved official unicorn status, debuting tone detection to evaluate emotional resonance in writing.
2019OpenAI
Capped-profit entity and Microsoft deal
OpenAI created a capped-profit subsidiary and received a $1 billion investment from Microsoft.
2021Grammarly
$200M Financing at $13.0B Valuation Led by Baillie Gifford
Raised $200 million at a $13 billion valuation in a round led by Baillie Gifford and BlackRock funds.
2022OpenAI
ChatGPT launch
ChatGPT launched on November 30, 2022 and reached 100 million users faster than any prior consumer app.
2023Grammarly
Rahul Roy-Chowdhury Appointed CEO & Launches Grammarly AI
Former Google executive Rahul Roy-Chowdhury became CEO, launching generative AI and contextual email rewrites.
2023OpenAI
Board crisis
The nonprofit board removed Sam Altman in November 2023; he returned as CEO within days and the board was rebuilt.
2024Grammarly
Agreement to Acquire Coda
Grammarly agreed to acquire Coda in December 2024; Coda co-founder Shishir Mehrotra became Grammarly's CEO.
2025Grammarly
$1B Financing, Superhuman Mail Deal and Rebrand
Closed $1 billion from General Catalyst in May, completed the Superhuman Mail acquisition in July and renamed the company Superhuman on October 29.
2025OpenAI
Acquired Jony Ive's io
OpenAI agreed to buy hardware startup io for just under $6.5 billion in an all-equity deal.
2025OpenAI
Recapitalization into OpenAI Group PBC
In October 2025 the for-profit became a public benefit corporation controlled by the OpenAI Foundation; Microsoft received about 27%.
2026Grammarly
Superhuman Docs Launch and GPTZero Deal
Rebuilt Coda as Superhuman Docs and agreed on June 23 to acquire GPTZero.
2026OpenAI
$122B funding round
OpenAI closed $122 billion in committed capital at an $852 billion post-money valuation on March 31, 2026.
2026OpenAI
Run rate nears $70B
Axios reported in September 2026 that annual recurring revenue was nearing $70 billion.
Acquisitions
Grammarly
- GPTZero2026Undisclosed
- Superhuman (Superhuman Mail)2025Undisclosed
- Coda2024Undisclosed
OpenAI
- io Products2025$6.5B
- Statsig2025$1.1B
- Rockset2024Undisclosed
- Global Illumination2023Undisclosed
Questions about Grammarly vs OpenAI
Who is the CEO of Grammarly Inc. and OpenAI?
Grammarly Inc. is led by Shishir Mehrotra and OpenAI is led by Sam Altman. Both serve as the top executive responsible for the company's strategy, operations, and financial performance.
When was Grammarly Inc. founded vs OpenAI?
Grammarly Inc. was founded in 2009 — 6 years before OpenAI, which was founded in 2015. Grammarly Inc.'s longer operating history gives it a deeper track record but also potentially more institutional inertia compared to the younger OpenAI.
How many employees does Grammarly Inc. have compared to OpenAI?
Grammarly Inc. employs approximately 1,000 people, while OpenAI employs approximately 4,500. OpenAI has the larger workforce at 4,500 employees, compared to Grammarly Inc.'s 1,000. A higher headcount does not necessarily imply greater efficiency — it often reflects differences in business model (e.g., manufacturing vs. software).
Where are Grammarly Inc. and OpenAI headquartered?
Both Grammarly Inc. and OpenAI are headquartered in United States, meaning they operate under the same primary regulatory and tax environment.
Who founded Grammarly Inc. and OpenAI?
Grammarly Inc. was founded by Max Lytvyn, Alex Shevchenko, Dmytro Lider. OpenAI was founded by Sam Altman, Elon Musk, Greg Brockman, Ilya Sutskever.
Which company has a longer operating history — Grammarly Inc. or OpenAI?
Grammarly Inc. has been operating for approximately 17 years, making it the more established of the two companies. OpenAI has been in operation for around 11 years. A longer operating history often signals greater institutional resilience and brand recognition, though it can also mean slower adaptation to new market conditions.
Figures come from each company's filings and the sources linked beside them. Amounts reported in another currency are shown in US dollars at an approximate rate and marked with ~. Back to the Grammarly vs OpenAI overview