Despite concerns that Facebook’s disappointing IPO would hurt startup funding, investors continue to pump large sums of money into technology firms.

Mobile payments upstart Square, for instance, nailed down $25 million in financing as part of a partnership with Starbucks announced Tuesday, on top of its recent $200 million cash infusion, which gives the company a valuation of $3.25 billion.

Square's latest investment cements its status among an exclusive, but growing, crowd of startups worth at least $1 billion in the eyes of private investors. The Billion Dollar Club, as it is known, has seen three new members join its ranks this summer, even as tech companies with recent IPOs have crumbled in the public markets.

But Silicon Valley seems unfazed by Wall Street's woes. Venture capitalists, big banks and even Howard Schultz are making big startup bets as the valuation frenzy carries on.

Check out the Internet startups that now call themselves members of The Billion Dollar Club. All slideshow statistics courtesy of PrivCo:

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  • Realtime ($1 Billion)

    <strong>Funding Date: </strong>8/8/2012 <strong>Funding Round:</strong> $100 million <strong>Valuation:</strong> $1 Billion <strong>Key Investors:</strong> BRZtech (which is funded by many individual investors and The Ongoing Group) <em>Realtime founder and CEO André Parreira.</em>

  • Spotify ($1 Billion)

    <strong>Funding Date:</strong> 6/17/11 <strong>Funding Round: </strong>$100 million <strong>Valuation: </strong>$1 billion <strong>Key Investors:</strong> Digital Sky Technologies, Accel Partners, Kleiner Perkins Caufield & Byers <strong>Current Rumored Valuation:</strong> $4 billion <em>Spotify Founder and CEO Daniel Ek (far left) attends Spotify Knocks It Out Of The Park at Stephen Weiss Studio on November 30, 2011, in New York City.</em>

  • Gilt Groupe ($1 Billion)

    <strong>Funding Date: </strong>5/10/11 <strong>Funding Round: </strong>$138 million <strong>Valuation: </strong>$1 billion <strong>Key Investors: </strong>Goldman Sachs and Softbank Group <em>Gilt Groupe Chairman Susan Lyne at the Fortune Brainstorm Tech conference in 2011.</em>

  • Evernote ($1 Billion)

    <strong>Funding Date: </strong>5/3/12 <strong>Funding Round: </strong>$70 million <strong>Valuation:</strong> $1 billion <strong>Key Investors:</strong> Meritech Capital, CBC Capital, T. Rowe Price, Harbor Pacific Capital, and Allen & Company

  • Box ($1.2 Billion)

    <strong>Funding Date: </strong>July, 2012 <strong>Funding Round:</strong> $125 million <strong>Valuation:</strong> $1.2 Billion <strong>Key Investors: </strong>General Atlantic, US Venture Partners, Andreessen Horowitz, Bessemer Venture Partners <em>Box CEO and co-founder Aaron Levie speaks at the Enterprise 2.0 Conference in Santa Clara, CA.</em>

  • Airbnb, Inc. ($1.3 Billion)

    <strong>Funding Date:</strong> 7/25/11 <strong>Funding Round:</strong> $112 million <strong>Valuation:</strong> $1.3 billion <strong>Key Investors: </strong>Digital Sky Technologies, Andreesen Horowitz, General Catalyst Partners, Jeff Bezos (Founder and CEO of Amazon) <strong>Current Rumored Valuation: </strong>$3-4 billion

  • Fanatics ($1.5 Billion)

    <strong>Funding Date: </strong>June, 2012 <strong>Funding Round: </strong>$150 million <strong>Valuation:</strong> $1.5 Billion <strong>Key Investors:</strong> Insight Venture Partners, Andreessen Horowitz <em>Fanatics CEO Michael Rubin.</em>

  • Workday ($2 Billion)

    <strong>Funding Date: </strong>10/24/11 <strong>Funding Round:</strong> $85 million <strong>Valuation:</strong> $2 billion <strong>Key Investors: </strong>T. Rowe Price, Morgan Stanley, Janus Capital, and Bezos Expeditions

  • Palantir Technology ($2.5 Billion)

    <strong>Funding Date:</strong> 9/7/11 <strong>Funding Round: </strong>$68 million <strong>Valuation: </strong>$2.5 billion <strong>Key Investors: </strong>SAC Capital and Tiger Global Management <strong>Current Rumored Valuation:</strong> $4+ billion

  • Square ($3.225 Billion)

    <strong>Funding Date:</strong> August 7th, 2012 <strong>Funding Round:</strong> $225 million <strong>Valuation:</strong> $3.225 Billion <strong>Key Investors:</strong> Rizvi Traverse, Starbucks, Sequoia Capital, KPCB, Tiger Global Management <em> Square Founder Jack Dorsey speaks at the Tribeca Disruptive Innovation Awards April 27, 2012, in New York City. </em>

  • Dropbox ($4 Billion)

    <strong>Funding Date: </strong>10/18/11 <strong>Funding Round:</strong> $250 million <strong>Valuation: </strong>$4 billion <strong>Key Investors:</strong> Index Ventures, Benchmark Capital, Goldman Sachs, Greylock Partners, Institutional Venture Partners, RIT Capital Partners, Valiant Capital Partners, Sequoia Capital, Accel Partners, and Hadi & Ali Partovi

  • Twitter ($8 Billion)

    <strong>Funding Date:</strong> 9/8/11 <strong>Funding Round: </strong>$800 million <strong>Valuation: </strong>$8 billion <strong>Key Investors:</strong> Digital Sky Technologies