Whether right or wrong, Nvidia has become the face of artificial intelligence (AI) on Wall Street. It's not a fluke; Nvidia's growth exploded since early last year, and the stock's gains have made it a household name among investors.

Still, it's worth pointing out that AI goes far beyond one company. You can buy and hold a stock like Nvidia, but don't dismiss the potential upside of some smaller companies that have the ingredients to become big winners down the road.

Here are three AI stocks you can add to your long-term portfolio:

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Source Fool.com