Startups raising money in the Series A stage are usually just a few years old.
But the size of Series A funding rounds has mushroomed in recent years and can now sometimes top $50 million.
One thing all Series A startups have in common is the need to take a proven product idea and give it traction in the marketplace.
That means starting to generate revenue, developing a marketing strategy and building a team that's bigger than just the founders.
Here are the pitch decks that startups have successfully used during the critical Series A funding rounds.
Business Insider regularly interviews startups about fundraising strategies and collects the pitch decks that helped them raise funding.