Character.ai vs OpenAI: Founders, CEOs and History
Character.ai was founded in 2021 by Noam Shazeer, Daniel De Freitas and is led by Karandeep Anand. OpenAI was founded in 2015 by Sam Altman, Elon Musk, Greg Brockman and is led by Sam Altman.
Company facts
Character.ai
- Founded
- 2021
- Headquarters
- Menlo Park, California, United States
- Current CEO
- Karandeep Anand
- Employees
- 130
OpenAI
- Founded
- 2015
- Headquarters
- San Francisco, California, United States
- Current CEO
- Sam Altman
- Employees
- 4,500
Founders
Character.ai
Noam Shazeer
Noam Shazeer co-founded Character.ai in 2021 and was its CEO until August 2024, when he returned to Google under the licensing deal and became a co-lead of the Gemini models at Google DeepMind.
Daniel De Freitas
Daniel De Freitas co-founded Character.ai in 2021 and served as its President. He had begun Google's open-domain chatbot work as a side project, which grew into Meena and LaMDA. He returned to Google DeepMind in August 2024 as part of the licensing deal.
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
Character.ai
- Noam Shazeer2021–2024
Co-founder & CEO
Led the company from founding to 20 million-plus users
Source - Daniel De Freitas2021–2024
Co-founder & President
Co-created the original chatbot technology
Source - Dominic Perella2024–2025
Interim CEO (General Counsel)
Ran the company through the founders' exit and early lawsuits
Source - Karandeep Anand2025–present
CEO
Former Meta VP of business products
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: Character.ai and OpenAI side by side
2015OpenAI
OpenAI founded as a nonprofit
OpenAI launched in December 2015 as a nonprofit AI research lab.
2019OpenAI
Capped-profit entity and Microsoft deal
OpenAI created a capped-profit subsidiary and received a $1 billion investment from Microsoft.
2021Character.ai
Character.ai founded
Noam Shazeer and Daniel De Freitas leave Google and found Character Technologies in Menlo Park.
2022Character.ai
Public beta launches
The web beta opens on September 16, 2022, letting anyone create and chat with AI characters.
2022OpenAI
ChatGPT launch
ChatGPT launched on November 30, 2022 and reached 100 million users faster than any prior consumer app.
2023Character.ai
$150M Series A at $1B valuation
Andreessen Horowitz leads a $150 million round in March 2023, with Nat Friedman, Elad Gil, SV Angel and A Capital.
2023Character.ai
Mobile apps and c.ai+
iOS and Android apps launch in May 2023, along with the $9.99-a-month c.ai+ subscription.
2023OpenAI
Board crisis
The nonprofit board removed Sam Altman in November 2023; he returned as CEO within days and the board was rebuilt.
2024Character.ai
Google licensing deal
In August 2024 Google licenses Character.ai's models for about $2.7 billion and rehires both founders; Dominic Perella becomes interim CEO.
2024Character.ai
First teen-harm lawsuit
Megan Garcia sues Character.ai and Google in October 2024 over the death of her 14-year-old son; the company adds teen-specific safety features.
2025Character.ai
Karandeep Anand named CEO
Former Meta VP of business products Karandeep Anand becomes CEO in June 2025.
2025Character.ai
Open-ended chat ends for minors
From November 25, 2025, users under 18 can no longer have open-ended chats; the company points them to formats such as Stories.
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%.
2026Character.ai
Family lawsuits settled
In January 2026 Character.ai and Google agree to settle five family lawsuits on confidential terms.
2026Character.ai
Pennsylvania lawsuit
Pennsylvania sues in May 2026, alleging bots posed as licensed medical professionals.
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
Character.ai
No verified acquisitions are listed.
OpenAI
- io Products2025$6.5B
- Statsig2025$1.1B
- Rockset2024Undisclosed
- Global Illumination2023Undisclosed
Questions about Character.ai vs OpenAI
Who is the CEO of Character.ai and OpenAI?
Character.ai is led by Karandeep Anand 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 Character.ai founded vs OpenAI?
OpenAI was founded in 2015 — 6 years before Character.ai, which was founded in 2021. OpenAI's longer operating history gives it a deeper track record but also potentially more institutional inertia compared to the younger Character.ai.
How many employees does Character.ai have compared to OpenAI?
Character.ai employs approximately 130 people, while OpenAI employs approximately 4,500. OpenAI has the larger workforce at 4,500 employees, compared to Character.ai's 130. A higher headcount does not necessarily imply greater efficiency — it often reflects differences in business model (e.g., manufacturing vs. software).
Where are Character.ai and OpenAI headquartered?
Both Character.ai and OpenAI are headquartered in United States, meaning they operate under the same primary regulatory and tax environment.
Who founded Character.ai and OpenAI?
Character.ai was founded by Noam Shazeer, Daniel De Freitas. OpenAI was founded by Sam Altman, Elon Musk, Greg Brockman, Ilya Sutskever.
Which company has a longer operating history — Character.ai or OpenAI?
OpenAI has been operating for approximately 11 years, making it the more established of the two companies. Character.ai has been in operation for around 5 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 Character.ai vs OpenAI overview