Durable growth is a wonderful thing. It is the baseline for owning 10-bagger stocks. This is why Peter Lynch, the legendary investor who crushed the market when running his mutual fund, Fidelity Magellan, has it as one of his top criteria when evaluating a stock. He wants companies that can grow sales and earnings at a double-digit rate for many years. Valuation can only take you so far.

Monster growers are rare. They are rarer still if they can grow durably for more than a decade. Despite short-term volatility and underperformance since going public, Rocket Lab USA (NASDAQ: RKLB) and Remitly Global (NASDAQ: RELY) have put up monster growth in the last few years. Better yet, you can buy both these stocks with under $100 right now.

Here's why growth investors should consider both Remitly and Rocket Lab for their portfolios.

Rocket Lab: Going to the Moon

Rocket Lab is an ambitious space flight company. Along with SpaceX, it is the only private company regularly sending commercial payloads into orbit.

Like SpaceX, it wants to become an end-to-end space company. This means providing customers with a way to get into space (the rockets), equipment and materials for spacecraft, and data and software services to help improve customer value.

It is a long way from fulfilling this entire dream, but it has made some fantastic progress so far. The small Electron rocket it uses today recently hit 50 launches, while its spacecraft business is growing rapidly.

This is far and away the best execution across space economy start-ups (most competitors have gone bankrupt). Recently, its backlog for customers hit over $1 billion.

Revenue has grown by close to 500% cumulatively since July of 2021, less than five years ago. Last quarter, revenue grew 71% year on year. There is still plenty of room for Electron rocket launches to grow, and the company hasn't even begun its data/software services division.

It is also working on its larger Neutron rocket that will generate much more in revenue per launch than the Electron. This gives Rocket Lab a path to multiply its revenue from just over $300 million today to the billions this decade.

At a market cap of $3.5 billion and share price of just $7 as of this writing, this could make it a cheap stock for those willing to hold shares for a decade. Ride the Rocket Lab growth wave -- this stock has a lot of upside.

Remitly Global: Modern international money transfers

Remitly deals with the financial and software world. The company is an upstart in the remittance market, which consists of consumer cross-border money transfers. With legacy competitors such as Western Union not innovating, Remitly saw a lot of ways to improve the customer experience in remittances and lower fees.