As you seek safe-haven stocks in the aftermath of the Brexit meltdown, consider the tech giants,  Facebook (FB) and Google parent Alphabet (GOOG)  . They have the size and high-demand services to withstand downturns.

To be sure, both companies suffered with the rest of the market Monday.

But Facebook and Google should provide growth opportunities -- perhaps a 30% upside. Both companies have expanded their offerings. Facebook is projecting strong growth for the next five years. Alphabet can boast of high profit margins. 

These stocks should be on your radar as "defensive growth" plays with considerable upside.

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Facebook

Facebook has beaten earnings expectations for the last four quarters.

Moreover, Facebook has expanded its portfolio of businesses with WhatsApp, Instagram, videos, news consumption and virtual reality platforms.

The company is projecting 34% per year earnings per share (EPS) growth for the next half a decade.

Trading at a PEG ratio of 0.91, Facebook shares are among the cheapest for a large tech stock. The company has 1.6 billion active users, and more importantly a growing ad business. It is also expanding its businesses in video and virtual reality.

The 44 analysts offering 12-month price forecasts for Facebook have a median target of $145, pointing to the nearly 30% price appreciation potential from current levels.

Investors who avoided Facebook because of the high stock price can now take advantage of the recent weakness.

To be sure, the stock pays no dividends because it's on a growth curve. But its annual free cash flow is becoming stronger with each passing year.

Churning out billions in rising FCF, Facebook is exactly where Apple was a decade ago. Facebook is a growth stock winner in what is likely to be a tough year for markets.

Alphabet

Alphabet shares are down 11% in 2016. The lower price offers an opportunity, though.

The company offers mid-teen earnings growth. It has an upside potential in excess of 30% over the next year. Alphabet's ad/search business is a major cash cow. 

ALPHABET is a holding in Jim Cramer's Action Alerts PLUS Charitable Trust Portfolio. See how Cramer rates the stock here. Want to be alerted before Cramer buys or sells GOOG? Learn more now.

Moreover, Alphabet is multi-faceted, including not only its popular search engine, but also ads, maps, apps, YouTube and Android and the related technical infrastructure.

The company has been innovative, as well. It offers Google Fiber, which is likely to be a strong competitor to AT&T, Promoted Pins, Self-Driving Cars/Vans, Google Assistant and Google Home and a possible online TV service. While its Moonshot factory arguably hasn't done as well, that tiny business is a relatively small part of the overall landscape.

But its strategy of adding other parts is a long-term growth positive.

The company's massive cash war-chest, coupled with minimal debt, also makes Alphabet among the safest companies around. Its nearly 22% profit margin, high return ratios and projected revenue growth are other positives.

At a PEG ratio of 1.23, Alphabet is Brexit-proof. Accumulate the stock at every dip and set yourself up for major gains.

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This article is commentary by an independent contributor. At the time of publication, the author held no positions in the stocks mentioned.

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