# Replit

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Company and online coding environment

Replit, Inc Logo Formerly Repl.it Founded 2016; 10 years ago (2016) in San Francisco, California, US Founders Amjad Masad Faris Masad Haya Odeh Headquarters Foster City, California , Number of locations 2 offices (2022) Services Hosting, IDE Website replit.com

**Replit** ([/ˈrɛplɪt/](https://en.wikipedia.org/wiki/Help:IPA/English)), formerly **Repl.it**, is an American technology company. Founded in 2016, Replit developed an [online integrated development environment](/source/Online_integrated_development_environment) (IDE) also named Replit that supports various programming languages.[1] In September 2024, it released the first version of Replit Agent, an [AI agent](/source/AI_agent) for automating [software development](/source/Software_development), with which users can interact in natural language.[2]

## History

In 2009, having seen significant advancements in browser and web technologies, [Masad](/source/Amjad_Masad) imagined a development environment built on the same premise as [Google Docs](/source/Google_Docs); that is, allowing the user to write and share code all in a web browser. In 2011, he produced an early [open-source](/source/Open-source) version of this concept, called "JSRepl".[3][4] Because [Masad](/source/Amjad_Masad) then spent a few years working at various companies,[1] including [Udacity](/source/Udacity) and [Codecademy](/source/Codecademy), JSRepl was used for the in-browser tutorials of [Udacity](/source/Udacity) and [Codecademy](/source/Codecademy).[4][5]

Replit was founded in 2016 by [Jordanian](/source/Jordan) [programmers](/source/Programmers) [Amjad Masad](/source/Amjad_Masad), Faris Masad, and designer Haya Odeh.[6][7] It was incorporated in [San Mateo](/source/San_Mateo%2C_California).[8][9] Its name comes from the acronym REPL, which stands for "[read–evaluate–print loop](/source/Read%E2%80%93eval%E2%80%93print_loop)". Initially a collaborative coding platform, Replit became with Agent an AI-powered software creation ecosystem centered around the ability to build complete applications by describing them in natural language.

In July 2025, Replit announced a partnership with [Microsoft](/source/Microsoft) to integrate its development platform with [Microsoft's](/source/Microsoft) enterprise tools, including the [Azure](/source/Microsoft_Azure) cloud infrastructure, making Replit's services available through the Azure Marketplace.[10] That same month, Replit's [AI agent](/source/AI_agent) went "rogue" and deleted a client company's entire database during a [code freeze](/source/Code_freeze), against the prompter's wishes.[11] This incident earned a nomination in the 2025 [AI Darwin Awards](https://en.wikipedia.org/w/index.php?title=AI_Darwin_Awards&action=edit&redlink=1).[12]

## See also

- [List of AI-assisted software development tools](/source/List_of_AI-assisted_software_development_tools)

- [Vibe coding](/source/Vibe_coding)

## References

1. ^ [***a***](#cite_ref-techcrunch_1-0) [***b***](#cite_ref-techcrunch_1-1) ["Repl.it lets you program in your browser"](https://techcrunch.com/2018/03/15/repl-it-lets-you-program-in-your-browser/). *TechCrunch*. March 15, 2018. Retrieved January 5, 2019.

1. **[^](#cite_ref-2)** Bastian, Matthias (September 7, 2024). ["First users praise Replit's new AI coding assistant"](https://the-decoder.com/first-users-praise-replits-new-ai-coding-assistant/). *The Decoder*. Retrieved July 14, 2025.

1. **[^](#cite_ref-36Kr-JSRepl_3-0)** ["AI Programming Fuels Remarkable Comeback After 50% Staff Layoff: ARR Tops $100M, Company Valuation Hits $60B"](https://web.archive.org/web/20260116191250/https://eu.36kr.com/en/p/3641937025322624). *eu.36kr.com*. [36Kr](/source/36Kr). January 16, 2026. Archived from [the original](https://eu.36kr.com/en/p/3641937025322624) on January 16, 2026. Retrieved April 27, 2026.

1. ^ [***a***](#cite_ref-Implicator-JSRepl_4-0) [***b***](#cite_ref-Implicator-JSRepl_4-1) Schuler, Marcus (October 8, 2025). ["OpenAI's Trillion-Dollar Circle: When Vendors Finance Their Own Payday"](https://web.archive.org/web/20260216080912/https://www.implicator.ai/openais-trillion-dollar-circle-when-vendors-finance-their-own-payday/). *Implicator.ai*. Archived from [the original](https://www.implicator.ai/openais-trillion-dollar-circle-when-vendors-finance-their-own-payday/) on February 16, 2026. Retrieved April 27, 2026.

1. **[^](#cite_ref-VB_5-0)** Sawers, Paul (February 18, 2021). ["Replit raises $20 million for collaborative browser-based coding"](https://web.archive.org/web/20210330044736/https://venturebeat.com/2021/02/18/replit-raises-20-million-for-collaborative-browser-based-coding/). *VentureBeat*. Archived from [the original](https://venturebeat.com/2021/02/18/replit-raises-20-million-for-collaborative-browser-based-coding/) on March 30, 2021. Retrieved March 13, 2021.

1. **[^](#cite_ref-cnbc_6-0)** Rodriguez, Salvador (October 22, 2018). ["Former Facebook engineer quit to build the programming tool he always wanted"](https://www.cnbc.com/2018/10/22/andreessen-horowitz-leads-4point5-million-seed-round-in-replit.html). *CNBC*.

1. **[^](#cite_ref-vator_7-0)** ["Today's Entrepreneur: Faris Masad"](https://vator.tv/news/2019-04-30-todays-entrepreneur-faris-masad). *VatorNews*. April 30, 2019. Retrieved January 12, 2021.

1. **[^](#cite_ref-8)** Eisenberg, Bart (October 22, 2012). ["#42 Computer Science 2.0: Part 1―Amjad Masad: Engineer, Codecademy; Co-inventor, repl.it"](https://gihyo.jp/dev/serial/01/software_designers/0042). Retrieved June 8, 2021.

1. **[^](#cite_ref-9)** Spina, Carli (May 5, 2014). ["Practice Programming Languages In Your Browser With Repl.it"](https://carlispina.wordpress.com/2014/05/05/repl-it/). Retrieved June 8, 2021.

1. **[^](#cite_ref-10)** Sherry, Ben (July 9, 2025). ["Microsoft and Replit Are Teaming Up to Make Vibe Coding for Businesses Even Easier"](https://www.inc.com/ben-sherry/microsoft-and-replit-are-teaming-up-to-make-vibe-coding-for-businesses-even-easier/91211387). *Inc*. [Archived](https://web.archive.org/web/20250711023053/https://www.inc.com/ben-sherry/microsoft-and-replit-are-teaming-up-to-make-vibe-coding-for-businesses-even-easier/91211387) from the original on July 11, 2025. Retrieved July 15, 2025.

1. **[^](#cite_ref-11)** Tyson, Mark (July 21, 2025). ["AI coding platform goes rogue during code freeze and deletes entire company database — Replit CEO apologizes after AI engine says it 'made a catastrophic error in judgment' and 'destroyed all production data'"](https://www.tomshardware.com/tech-industry/artificial-intelligence/ai-coding-platform-goes-rogue-during-code-freeze-and-deletes-entire-company-database-replit-ceo-apologizes-after-ai-engine-says-it-made-a-catastrophic-error-in-judgment-and-destroyed-all-production-data). *Tom's Hardware*. Retrieved September 10, 2025.

1. **[^](#cite_ref-12)** Gault, Matthew (September 9, 2025). ["AI Darwin Awards Show AI's Biggest Problem Is Human"](https://www.404media.co/ai-darwin-awards-show-ais-biggest-problem-is-human/). *404 Media*. Retrieved September 10, 2025.

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Adapted from the Wikipedia article [Replit](https://en.wikipedia.org/wiki/Replit) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Replit?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.