Fundraising Fox

ThirdLove

24 known investors

thirdlove.com β†—

ThirdLove is a US direct-to-consumer lingerie brand selling size-inclusive bras and underwear fitted via an online quiz.

Also known as Third Love Β· Thirdlove

Investors Β· 24

Also in the syndicate Β· 16

Allen & CompanyleadAnne WojcickiBarry SternlichtJeff KeswinKatie CouricKeith RaboisLori GreeleyMichael ZeisserMunjal ShahNancy PeretsmanNasir Jones (NAS)Silas ChouSusan WojcickiTim ArmstrongValor EquityYuri Milner

Company profile

researched Aug 2026

ThirdLove is an American lingerie company founded in 2013 by Heidi Zak and her husband David Spector, headquartered in San Francisco. It sells bras, underwear, loungewear, sleepwear and sportswear directly to consumers online, and is known for size-inclusive assortments including half-cup sizes and for an online fit quiz (variously described as FitFinder / Fit Finder / Fitting Room) that recommends a size and style. The brand launched its first line in spring 2014 and by 2019 offered 78 sizes, adding 24 larger sizes in June 2018.

The current product catalog is organized into collections such as 24/7 Classic, ComfortStretch, Thermoregulating (TempSync, using 37.5 Tech fabric), Zero Edge, Organic/Seamless Cloud Cotton, All Day Lace, Rose Lace, Deco Lace, Fleur Lace, Bare Mesh, Form 360 and Kinetic activewear. Bras are offered in band sizes 30-48 and cups AA through I including half cups, with underwear and tops in XS-3X. Typical listed bra prices run roughly $48-$118, with underwear from about $18-$39 per item or multi-pack; accessories such as silicone nipple covers are also sold.

The company positions its assortment around specific fit problems ("bra-blems") such as gaping cups, back and armhole smoothing, straps that slip, minimizing and nipple coverage, and states that its fit quiz is based on data from millions of body types.

Founding story

ThirdLove was founded in 2013 by Heidi Zak and David Spector, both former Google employees; Ra'el Cohen is also identified by the company as a co-founder and served as its lingerie designer. The idea came from Zak's own difficulty finding bras that were simultaneously comfortable and attractive, prompting her to leave an advertising role at Google to take a data-driven approach to bra design. The team used Craigslist to recruit 100 women who photographed themselves in fitted tank tops worn over their bras; those images informed both a prototype bra and an app for determining bra size. Finding that standard cup sizes did not fit 37% of women, the company introduced half-cup sizes. Before ThirdLove, Spector was a partner at Sequoia Capital investing in consumer internet, e-commerce and analytics, and earlier worked at IBM and Google, where he helped lead early commerce efforts including Google Checkout, Product Search and Google Analytics.

Business model

Direct-to-consumer e-commerce: ThirdLove designs its own bras and underwear and sells them through its website, bypassing third-party retailers and marketplaces, and owns the end-to-end customer relationship and the data behind it. Purchases are supported by a try-before-you-buy program, free shipping thresholds, a free loyalty/rewards program and live chat and text-based customer support.

Revenue comes from online sales of branded intimates and apparel at retail price points of roughly $48-$118 for bras, $18-$39 for underwear items and multi-packs, plus loungewear, sleepwear, activewear and accessories; promotional discounting and multi-pack bundles (e.g., 3-for-$49 underwear) are used.

Traction

As of February 2019 the company reported over $100 million in annual revenue, 78 bra sizes offered, and about 12 million women having used the Fit Finder tool. A 2018 report referenced a 1.3 million-woman waitlist for a bra launch. Distribution at that time was US-only, though orders were arriving from abroad.

Latest developments

The current site shows an expanded catalog including Thermoregulating TempSync bras, briefs, thongs, anti-chafe shorts, bike shorts and pullover sports bras, a Form 360 lifting wireless bra, ComfortStretch front-close racerback bras, breathable silicone nipple covers, Seamless Stretch Cotton bodysuits and tank tops, and lace lines (All Day, Rose, Deco, Fleur). A Kinetic adjustable sports bra is labeled a 2026 Shape Fitness Award winner. Seasonal promotions of up to 30% off plus an additional 20% off orders over $135 were running at the time of capture.

β–ΈFull profile β€” market position, technology, go-to-market, geography, history, risks & controversies

Market position

In 2021 NPD Group ranked ThirdLove the third largest online intimate apparel brand in the US, behind Victoria's Secret and American Eagle's Aerie. Forbes valued it at approximately $750 million in October 2018 and placed it on the Next Billion-Dollar Startup list; a source cited by TechCrunch put its valuation above $750 million after the 2019 Series B. It is characterized as a direct-to-consumer challenger to incumbent intimates retailers.

Size-inclusive assortment including half-cup sizes and a broad band/cup range, a data-derived fit quiz built from aggregated body imagery and shopper inputs, a try-before-you-buy program, and product lines organized around specific fit complaints rather than only style. The brand also differentiated through inclusive marketing positioned explicitly against Victoria's Secret.

Technology

A proprietary fit quiz (Fit Finder / FitFinder / virtual Fitting Room) collects body and fit-problem data to recommend size and style; earlier versions used a smartphone camera to size shoppers. The company applies aggregated body-shape data and analytics to product design, size creation (including half cups) and to personalization of the online shopping experience; a virtual Fitting Room platform with a personalized 3D shopping experience was announced in January 2021. Product technology includes 37.5 Tech thermoregulating fabric in the TempSync line, seamless and wireless constructions, and recycled lace.

Go-to-market

Online-first acquisition, historically a heavy buyer of Facebook advertising targeted at prospective customers, combined with the Fit Finder quiz as an acquisition and personalization tool. The company has used pop-up retail (initially for brand awareness rather than sales, including a Soho pop-up from July 2019 to March 2020) and gained significant earned media from its 2018 public exchange with Victoria's Secret, including an open letter in the New York Times.

Women shopping for bras and underwear across a wide range of body shapes and sizes, including those poorly served by standard cup sizing; sizing spans bands 30-48, cups AA-I with half cups, and apparel sizes XS-3X, with specialty styles for nursing, post-surgery, sports and sensitive skin.

Geography

Headquartered in San Francisco, California, with Wikipedia describing the area served as worldwide. As of February 2019 distribution was limited to the United States, with international expansion and local facilities planned; customer support hours are quoted in US Pacific Time.

History

The first product line launched in spring 2014. The company nearly collapsed while manufacturing in Mexico because of high fabric import costs, losing $400,000 in investment capital before shifting production to China; it streamlined its app and introduced a try-before-you-buy program in March 2015. In 2017 Zak was named to Fast Company's "100 Most Creative People." In June 2018 ThirdLove added 24 larger sizes, and in October 2018 Forbes estimated the company at $750 million and included it on its Next Billion-Dollar Startup list. A public dispute with Victoria's Secret followed in late 2018. In 2019 the founders received an EY Entrepreneur of the Year award for Northern California, the company raised a $55 million Series B, and it opened its first pop-up shop in Manhattan's Soho neighborhood (July 2019 to March 2020). In 2021 NPD Group named it the third largest online intimate apparel brand in the US, and it launched a Seamless wireless bra line. By 2022 the assortment spanned underwear, loungewear, sportswear and sleepwear, with the style count doubled versus 2021.

Risks & controversies

In October 2018 Victoria's Secret filed two USPTO applications for the name "Victoria's Secret First Love." In a November 2018 Vogue interview, then-L Brands CMO Ed Razek said the Victoria's Secret Fashion Show would not cast plus-size or "transsexual" models and that the brand is "nobody's third love"; Zak responded with a widely shared open letter in the New York Times, Victoria's Secret posted an apology, and Razek resigned in 2019. The company also faced an early operational near-failure, losing $400,000 in capital on Mexican manufacturing before relocating production to China. The Wikipedia article carries editorial notices flagging promotional content and undue weight, indicating limited neutrality in that source.

Compiled by commissioned research from 8 cited public sources β€” announcements, filings, and press listed under research sources below.

Key figures

latest reported
Annual revenueFeb 2019$100M
Bra sizes offeredFeb 201978 sizes
Share of women not fit by standard cup sizesJan 201337%
Total funding raised since foundingFeb 2019$68M
ValuationFeb 2019$750M
Valuation (Forbes estimate)Oct 2018$750M
Women who have used Fit FinderFeb 201912,000,000 users

Company-reported or press-reported figures, each dated to when it was claimed β€” not independently audited.

Timeline Β· 12

launches, deals, and filings
Jan 2026
Kinetic Adjustable Sports Bra listed as a 2026 Shape Fitness Award winner

source β†—

Jan 2021
Virtual Fitting Room platform and 3D shopping experience unveiled

source β†—

Jan 2021
Seamless wireless bra line launched

source β†—

Jul 2019
First pop-up shop opens in Soho, Manhattan

ThirdLove's first pop-up shop operated from July 24, 2019 until March 2020.

source β†—

Jun 2019
Founders receive EY Entrepreneur of the Year 2019 award for Northern California

Co-CEOs Heidi Zak and David Spector recognized in the Northern California region.

source β†—

Feb 2019
$55M Series B round

Round co-led by L Catterton and Allen & Company, with participation from Anne Wojcicki, Susan Wojcicki, Katie Couric, Nancy Peretsman, Tim Armstrong, Jeff Keswin, Michael Zeisser, Felicis Ventures and Valor Equity; proceeds earmarked for additional sizes plus retail, international and category expansion.

$55M source β†—

Nov 2018
Open letter to Victoria's Secret published in the New York Times

Heidi Zak responded to Victoria's Secret CMO Ed Razek's Vogue remarks with an open letter in the New York Times that circulated widely on Instagram.

source β†—

Oct 2018
Named to Forbes Next Billion-Dollar Startup list

Forbes estimated ThirdLove's value at $750 million and placed it on its Next Billion-Dollar Startup list.

source β†—

Jun 2018
24 larger bra sizes added

source β†—

Jan 2017
Heidi Zak named to Fast Company's 100 Most Creative People

source β†—

Mar 2015
Try-before-you-buy program introduced

The company streamlined its app and implemented a try-before-you-buy program after moving manufacturing from Mexico to China.

source β†—

Jan 2014
First bra line launched

ThirdLove launched its first product line in spring 2014.

source β†—

Dated company events from announcements, filings, and press; legal rows summarize public dockets and regulator releases.

In the news

β–ΈResearch sources Β· 8

primary sources listed

8 public sources were cited for this profile; the first-party ones are listed here.

Frequently asked questions

What does ThirdLove do?
ThirdLove is a US direct-to-consumer lingerie brand selling size-inclusive bras and underwear fitted via an online quiz.
Who are ThirdLove's investors?
ThirdLove's investors include Bling Capital, Elizabeth Street Ventures, Felicis Ventures, Grace Beauty Capital, Halogen Ventures Management Company Llc, Monta Vista Capital, Scrum Ventures, XG Ventures.