Every funding round is really a checkpoint. At each one, a startup trades a slice of ownership for the money it needs to reach the next milestone - and the milestones get bigger as you climb. Understanding what each stage is for matters more than memorising the labels, because it tells you what you need to prove before anyone will fund the next step. Let's walk the whole ladder. (Figures below are rough industry ranges - they vary a lot by country, sector and year - so treat them as orientation, not gospel.)
Pre-seed: the idea and the first build
This is the very beginning - often just a founder, an insight, and maybe a prototype. Pre-seed money usually comes from the founders themselves, friends and family, angel investors, or startup studios. The goal is simple: turn the idea into something real enough to test. Typical range: £20k–£250k. What you're proving: that you can build the thing and that a few real people want it.
Mostly into building a first product. It's why founders without a technical co-founder get stuck here - and why models like our funded-build approach exist: we invest and build the MVP so you can reach the milestones that unlock the next stage.
Seed: proving people actually want it
Seed is the first "proper" round for most startups. You've got a product; now you're proving there's genuine demand - early users, early revenue, signs of repeatable growth. Money comes from angel investors, seed funds and early-stage VCs. Typical range: £250k–£2m. What you're proving: product-market fit is within reach - people want this, and you can reach them.
Series A: turning traction into a machine
By Series A, "some people like it" isn't enough - investors want evidence of a business that can scale. Consistent growth, real revenue, a clear model for acquiring customers profitably. The money goes into turning early traction into a repeatable engine: hiring, sales, scaling the product. Typical range: £2m–£12m. What you're proving: this isn't a lucky start, it's a business that grows predictably.
Series B: scaling what already works
Series B is about pouring fuel on a fire that's already burning. You've proven the model; now you're expanding - bigger team, new markets, more product. Investors here are less worried about "does it work?" and more about "how big and how fast?". Typical range: £10m–£40m. What you're proving: you can scale efficiently without the wheels coming off.
Series C, D and beyond: going big
From Series C onwards, startups are usually established, growing fast, and raising to dominate. The money funds aggressive expansion - new countries, acquisitions, entirely new product lines, or simply out-spending rivals to win a market. Rounds get large (often £30m–£100m+, and much more at later stages), and the investors change too: growth funds, private equity, sometimes sovereign wealth and hedge funds. Each further letter - D, E, F - is typically another large round on the road to an exit.
The finish lines: IPO, acquisition... or unicorn
Most funding journeys are heading toward one of two exits: an acquisition (a bigger company buys you) or an IPO (the company lists on a stock market and the public can buy shares). These are the moments founders and investors finally turn ownership into cash.
Somewhere along the way, a rare few cross a famous threshold. A "unicorn" is a startup valued at $1 billion or more while still privately held - the term was coined because, originally, they were supposed to be that rare. Reaching it usually means huge, fast growth across several rounds. The even rarer decacorns ($10bn+) sit above them. It's worth being clear-eyed: the vast majority of startups never become unicorns, and they don't need to in order to be genuinely successful, life-changing companies.
The quick reference
| Stage | Typical raise | What you're proving |
|---|---|---|
| Pre-seed | £20k–£250k | You can build it; a few people want it |
| Seed | £250k–£2m | Real demand; product-market fit in sight |
| Series A | £2m–£12m | Predictable, repeatable growth |
| Series B | £10m–£40m | You can scale efficiently |
| Series C–D+ | £30m–£100m+ | Market dominance & expansion |
| Unicorn | $1bn+ valuation | Rare, massive, fast growth |
One thing to remember before you chase a round
Raising money is not the goal - it's fuel for reaching the next milestone, and every round you raise dilutes your ownership. The best founders raise as much as they need to hit the next proof point, not as much as they possibly can. And the surest way to raise well at any stage is the same: have a real product and real traction to show. That's the thing that unlocks every door on this ladder.
If you're at the very bottom of it - a strong idea, no product yet - the first rung is the hardest and the one we help with most. See how our funded-build model works, or read what investors look for before you make your first raise.