Paul Sciarra and Ben Silbermann leave their jobs to establish Cold Brew Labs, the precursor to Pinterest.

The development of Pinterest began in earnest in December 2009, with the earliest versions of the platform being rudimentary.

Pinterest takes part in the TechCrunch Disrupt conference in New York City. Despite not being a main stage startup, the company's presence is facilitated by FirstMark Capital, a Disrupt sponsor.

Former IAC M&A boss Shana Fisher contacts Pinterest, expressing her admiration for the product and her desire to invest in the company.

Pinterest is conceptualized by co-founders Ben Silbermann, Evan Sharp, and Paul Sciarra.

On May 7, 2011, Pinterest secured funding in a Series A round, marking a significant milestone in its financial growth.

On September 15, 2011, Pinterest successfully raised $10 million at a valuation of $40 million, showcasing its rapid financial progress.

Pinterest confirmed raising $27 million in a funding round led by Andreessen Horowitz on October 7, 2011, according to TechCrunch.

Ann Romney, the wife of politician Mitt Romney, joined Pinterest in February 2012. This event was covered by the Washington Post.

Flickr implements the 'nopin' HTML meta tag to allow users to opt out of having their photos pinned on Pinterest.

Flickr implemented the 'Nopin' meta tag to prevent certain images from being shared on Pinterest.

Pinterest announced the revamp of profile pages and the upcoming release of an iPad app.

Pinterest took steps to address copyright concerns and issues related to image sharing.

Pinterest updated its terms in March 2012. The changes were aimed at addressing user concerns and included removing the right to sell user content.

Pinterest responded to concerns by changing its terms of service in March 2012. The company clarified that it did not intend to sell user content and removed language that allowed them to do so.

On April 24, 2012, Pinterest CEO Nicholas Carlson shared insights on how Pinterest rose to prominence as a major player on the internet.

On May 1, 2012, Pinterest introduces automatic attribution of authors on images from platforms like Flickr, Behance, YouTube, and Vimeo, as well as from sites mirroring content on Flickr.

On May 17, 2012, Pinterest secured funding in Series C round, indicating investor confidence in the platform's growth and potential.

On May 18, 2012, Pinterest raised $100 million to fund its international expansion.

In June 2012, Michelle Obama joined Pinterest.

On August 10, 2012, Pinterest made a significant move by opening its platform to the public, eliminating the need for a request or invitation to join the site.

On August 14, 2012, Pinterest expanded its accessibility by launching dedicated apps for Android and iPad users, enhancing the user experience on mobile devices.

By August 15, 2012, Pinterest expanded its user base by opening up the platform to all, increasing accessibility and engagement.

On September 20, 2012, Pinterest announced the recruitment of Jon Jenkins as the new head of engineering, bringing his extensive experience from Amazon to lead the technical team.

By October 14, 2012, Pinterest rolled out business accounts, providing businesses with tools and features to optimize their presence on the platform.

Pinterest introduced business accounts, allowing businesses to convert personal accounts or create new ones specifically for business purposes.

On December 2, 2012, Pinterest raised $100 million with a valuation of $1.5 billion.

In January 2013, Pinterest acquired the Recipe Discovery Site Punchfork and announced its decision to shut down the platform. This strategic move aimed to integrate Punchfork's features into Pinterest's existing services.

On February 20, 2013, Pinterest confirmed a significant $200 million Series D funding round, leading to a valuation of $2.5 billion. This financial milestone marked a major achievement for the social media platform.

Pinterest acquired the mobile startup Livestar, although the terms of the deal were not disclosed.

In October 2013, Pinterest acquired the coding challenge site Hackermeter and decided to shut it down. This strategic move was part of Pinterest's expansion and development.

On October 23, 2013, Pinterest secured a $225 million round of equity funding, increasing the website's valuation to $3.8 billion. The investors included Fidelity Investments, FirstMark Capital, Andreessen Horowitz, Valiant Capital Partners, and Bessemer Venture Partners.

In January 6, 2014, Pinterest acquired VisualGraph, a startup specializing in image recognition and visual search technology.

Pinterest challenges Google by launching Guided Search, enabling visual discovery for users who don't know the names of things, a feature Google lacks, according to ReadWrite.

In May 2014, Pinterest rolled out promoted pins, similar to Google's advertising model. This move marked a significant step for Pinterest in monetizing its platform and offering advertising opportunities to brands.

On May 15, 2014, Pinterest raised $200 million in a funding round known as Series F. The funding was aimed at investing in discovery and monetization of the platform.

On June 11, 2014, Pinterest introduced Guided Search on the web, making the platform more search engine-like. This feature aimed to enhance user experience by providing more tailored search results.

In July 2014, Pinterest acquired Icebergs, a platform for creatives.

Pinterest introduces a direct messaging feature that enables users to privately discuss pins.

In August 2014, Pinterest added the ability for users to chat privately about a specific pin.

In August 26, 2014, Pinterest introduced a new analytics dashboard specifically designed for business users, providing them with valuable insights and data to enhance their marketing strategies.

On October 6, 2014, Pinterest announced the launch of 'Pin Picks', a curated collection of content aimed at enhancing user experience and engagement on the platform.

In December 28, 2014, Pinterest revealed plans to expand its Promoted Pins feature to all advertisers after a successful beta program, indicating a significant step towards monetization.

Pinterest aimed to attract more male users by introducing new search filters.

Pinterest starts displaying Promoted Pins in users' home feeds, increasing the visibility of advertising on the platform.

Pinterest announces a collaboration with Apple Inc. allowing iOS users to download apps directly from Pinterest using special app Pins.

Pinterest raises $553 million at an $11 billion valuation, allowing employees to sell part of their vested stock. Initially reported on March 16 with $367 million raised, an additional $186 million is announced on May 8.

In March 2015, Pinterest's valuation reached $11 billion after securing a significant amount of new funding.

On April 1, 2015, Pinterest launched its Jumpstart program to break into overseas markets more effectively, showcasing its global expansion efforts.

Pinterest introduced a new 'Pin It' button designed to streamline the bookmarking process.

Pinterest acquired a team from Hike Labs, which included Jason Shellen, a veteran from Google Reader and Blogger.

Pinterest announced the launch of the Marketing Developer Partners Program to enhance marketing strategies on the platform.

Pinterest unveils the beta version of its developer platform, enabling developers to access data of Pinterest users who link their accounts to external apps. Developers can apply to be on a white list for this access.

In May 2015, Pinterest included an additional $186 million in its Series G funding round, allowing employees to sell shares.

In May 2015, Pinterest added $186 million to its Series G funding round and offered employees a chance to sell shares.

Tim Kendall announced on May 18, 2015, the introduction of new Promoted Pin options on Pinterest to assist users in achieving their objectives. These enhanced options provided more flexibility and customization for promoting content on the platform.

Pinterest introduced its first video-like ad and new ad pricing models, aiming to enhance advertising opportunities on the platform.

Pinterest introduced Cinematic Pins, a new feature that allows users to create cinematic content on the platform.

On June 2, 2015, Pinterest announced the launch of Buyable Pins, allowing users to make purchases directly on the platform.

Pinterest introduces Buyable Pins, a special type of pin that enables users to make purchases directly within the app on iPhone and iPad. Users can select items, choose different options, and complete the purchase using various payment methods like Apple Pay.

Pinterest expands the availability of Buyable Pins to reach a wider audience on different platforms, enhancing the shopping experience for users beyond iPhone and iPad.

In October 2015, Pinterest announced the expansion of Buyable Pins to additional E-Commerce platforms, enabling thousands of merchants to sell their products directly on the platform.

Pinterest introduces a visual search tool that enables users to select a portion of an image and discover similar Pins, enhancing the user experience on the platform.

In November 2015, Pinterest introduced a 'visual search' tool, allowing users to search for items using images when they are unable to describe what they are looking for, improving search functionality.

Pinterest unveiled a new visual search tool in November 2015, offering users a unique way to search for items by images rather than text, enhancing the overall user experience.

Pinterest acquired Fleksy, a custom keyboard app, as announced on fleksy.com. The acquisition was finalized on June 15, 2016.

Pinterest acquired the team behind mobile apps Highlight and Shorts in July 2016.

In August 2016, Pinterest started expanding its visual search tools to include video content.

In August 2016, Pinterest revealed plans to establish its initial engineering office outside the Bay Area in Seattle. The office's temporary location was set to be in the WeWork building in downtown Seattle.

Pinterest made a strategic move in August 2016 by launching its first video ads to attract big-brand advertising dollars.

Pinterest acquired Instapaper and announced that it will continue to exist as a separate app.

Pinterest achieved 150 million monthly users, falling short of previously leaked projections from 2015.

Pinterest launched a new feature called 'Tried It' button to help users track their purchases and project ideas.

On February 1, 2017, Pinterest started rolling out search advertising for a select group of partners, enabling them to run search ad campaigns using their Kenshoo dashboards.

Pinterest introduced a feature allowing users to search for elements within images and through their camera, enhancing visual search capabilities.

Pinterest introduced three new products - Lens, Instant Ideas, and Shop the Look, enhancing visual search capabilities for users.

On May 23, 2017, the Chinese Government included Pinterest in the list of banned sites in the People's Republic of China, along with other major platforms like Google, Facebook, Twitter, and more.

In June 2017, Pinterest introduced a new feature to its Lens camera search, enabling users to capture images of complete dishes and receive full recipes instead of just ingredient-based options.

Pinterest expands its Shopping Ads feature, allowing hundreds of advertisers to utilize the platform for advertising.

Pinterest introduces a new beauty search tool catering to various skin tones, aiming to enhance inclusivity and user-friendliness on the platform.

Instapaper successfully buys itself back from Pinterest, becoming an independent entity once again. This move signifies a shift in ownership and strategic direction for Instapaper.

Pinterest introduced an API to provide brands with more insights on influencer campaigns. This update allows brands to track metrics and measure campaign results, enhancing their ability to reach users seeking new ideas.

Pinterest revealed its plans to establish its first Canadian office in downtown Toronto, marking a significant step in expanding its presence beyond the United States.

Pinterest replaces the older Buyable Pin format with Product Pins, allowing shoppers to directly access checkout pages on retailers' sites for quicker purchases. Shopping recommendations are incorporated into pins in style and home décor categories to offer users a shoppable feed of similar styles.

Pinterest enlists Goldman Sachs and JPMorgan Chase for advice on its upcoming Initial Public Offering (IPO), indicating a significant step towards going public.

The Wall Street Journal reveals that Pinterest has confidentially submitted paperwork to the SEC for an IPO, aiming for a valuation of at least $12 billion, showcasing the company's financial ambitions.

Pinterest appoints Jeremy King, former Walmart CTO, as the new head of engineering to lead the tech team.

Pinterest, along with Uber Technologies, chooses the New York Stock Exchange as the location for its stock market debut.

Pinterest becomes a public company with a strong start in the stock market, as its shares surge over 28% on the first day of trading.

Pinterest introduced two new product showcase tools in August 1, 2019, to enhance user shopping experiences. The 'Picked for You' Pin collection displayed at the top of the home feed and the updated shopping section below Pins aimed to prompt user purchases based on their on-platform behaviors.

Pinterest experienced a surge in its stock value after releasing a strong second-quarter earnings report, exceeding expectations and impressing investors.

Pinterest has launched new video tools to encourage brands and creators to upload more videos on the platform.

Pinterest is using computer vision technology to assist users in finding recipes based on images they upload.

Pinterest has surpassed 200 million monthly active users, showing a 40% growth since the previous year.

Francoise Brougher, former Business Lead at Square, is appointed as the first Chief Operating Officer of Pinterest.

Pinterest and Zoom stocks ended the day with a significant increase in shares.

In 2020, Pinterest experienced a significant increase in usage as people sought inspiration for home projects, recipes, and crafts during the pandemic.

Pinterest garnered attention on Google Trends, indicating a spike in online searches and interest in the platform during that period.

On October 20, 2021, Bloomberg reported that PayPal expressed interest in acquiring Pinterest, indicating significant industry developments.