Investors looking for top tech stocks to buy certainly have a wide range of options to choose from in both the domestic Canadian market and abroad. In fact, I'd argue that most global markets may be a better place to invest in this regard for the kind of innovation and growth many investors are after.

That's not to say there aren't great Canada-based companies to look at. I've got three on this list here.

In fact, I think these three Canadian tech stocks could be among the best growth opportunities in the market right now for those looking to invest in companies with sustainable and durable competitive advantages over the very long term. Let's dive into why this may be the case.

Shopify

Shopify (TSX:SHOP) is one of the largest e-commerce giants in the world, and one of the top Canadian growth stocks I continue to pound the table on. For long-term investors who believe that e-commerce is the future, Shopify's platform, which empowers businesses to build and manage online stores, is one that certainly could provide the growth engine a portfolio needs to see meaningful capital appreciation over time.

That may seem like an overly-simplistic thesis, but there's something to that. Shopify has experienced exponential revenue growth over the past few years, specifically in the post-pandemic world. The company reported significant gains in subscription revenue and merchant solutions, and many analysts believe this growth trajectory will continue over the long term. As the company's ability to attract and retain a growing base of users, from small businesses to enterprise clients, continues to improve, so too do its growth prospects. It's my view that the market Shopify operates in is one that investors should be exposed to over the long term.

In addition, the company continues to innovate with products like Shopify Payments, Shopify Capital, and Shopify Shipping. This product expansion is helping the company create a robust ecosystem that goes beyond e-commerce. Recently, the company launched Shopify Markets and Shopify Audiences, initiatives aimed at helping merchants expand internationally and target customers more effectively. If these innovations drive further growth in customer acquisition and retention, I think this is one tech stock to buy that can't be overlooked.

Constellation Software

Constellation Software (TSX:CSU) is a unique player in the Canadian technological landscape. The company specializes in acquiring niche software companies in various markets. These companies tend to have loyal customer bases, steady recurring revenues and established market positions, allowing Constellation to achieve consistent cash flows and sustainable growth.

Constellation's acquisition strategy is the key to its success. The company has created a decentralized model that maximizes profitability by acquiring small, profitable software firms and managing them with a hands-off approach. As such, Constellation's steady revenue and earnings growth demonstrate the success of this approach.

Moreover, the company's stock has delivered impressive returns over the years, consistently outperforming the TSX. It has established itself as one of the best-performing Canadian tech stocks. Constellation's ability to generate steady returns, even in challenging economic conditions, makes it a reliable investment.

Open Text

Open Text (TSX:OTEX) is a leader in enterprise information management solutions, helping companies manage their data. As businesses increasingly focus on digital transformation, Open Text's solutions have become essential, allowing organizations to store, manage, and analyze massive amounts of information.

The company is placed at the heart of the digital transformation movement. Its leading position in enterprise content and information management makes it a trusted choice for large organizations. Open Text has expanded its cloud offerings, representing a growing portion of its revenue. As more companies move to the cloud, Open Text's cloud-based solutions provide a higher-margin revenue stream, potentially driving profitability in the coming years.

Open Text has recently acquired organizations that complement its existing solutions, such as security and artificial intelligence technology providers. It broadens its product portfolio and enhances its ability to meet evolving customer needs. Hence, this strategy has enabled the company to remain competitive in a rapidly changing market.