SaaS Investors UK: Who's Funding B2B Software in 2026

The UK is the largest software and startup funding market in Europe. What decides whether you're able to raise, and how fast, is often a combination of storytelling and metrics.

SaaS investors are metrics people, and the founders who raise are the ones whose metrics back what they are claiming, or who can tell a credible story about how the round will produce those metrics.

This guide covers why SaaS fundraising runs on metrics, what you need to show at each stage, what to do if you do not have the numbers yet, and a preview of active UK SaaS investors you can approach now. The investors named are drawn from the PitchBuilder UK investor database, which is verified through 2026.

Why SaaS fundraising runs on metrics

Other sectors can raise on a story and a prototype. SaaS investors have a better, data-driven sense of "what good looks like." 

Jay Dickieson Founder and Managing Director, PitchBuilder

SaaS investors are metrics people. We sometimes see investors who get a founder's email with a short pitch and the deck attached, and reply with one line before they have even opened it: what's their ARR. Metrics matter that much.

Which metrics matter depend on your stage, and getting that judgment wrong is one of the most common mistakes founders make.

• The pre-seed founder who quotes detailed retention figures on a product nobody uses looks naive.
• The post-revenue founder who waves away questions about ARR or growth looks evasive.

The right metrics for your stage are the ones an investor at that stage actually uses to decide.

Jay Dickieson Founder and Managing Director, PitchBuilder

It comes down to understanding what metrics matter at what stage. Are you pre-seed and pre-product or pre-revenue? Then your metrics should be based on a logical hypothesis that funding will let you test. If you have a live product and revenue, your metrics are critical.

Work backwards from the round after this one

We always encourage founders to think about this funding round, in the context of future funding rounds.

Specifically, "what am I going to need to prove before each funding round to enable us to raise."

Then, in this round, you need to make sure you are raising enough money to prove whatever it is that unlocks the next round (with some margin built in). 

The worst thing you can do is run out of money without having demonstrated a step change that justifies the next round - you are basically using the capital you raise now to buy the proof that unlocks the next round (of if you don't need another round, you are buying the certainty that you can reach profitability). 

For SaaS investors, that "proof" is usually hard data. 

Jay Dickieson Founder and Managing Director, PitchBuilder

Work backwards. For every round in SaaS, ask what you need to prove and how much it will cost to prove it, with contingency for when it goes wrong. Make sure you raise enough to not get into a jam. Are you raising enough now to prove the metrics that will let you raise again? That is super critical.

What to do if you do not have metrics yet

Plenty of fundable SaaS businesses are too early to have strong numbers, and that's fine at pre-seed and seed.

At that stage, you are selling the vision and a credible, specific plan for how this round produces the metrics that prove it.

You need solid hypotheses on unit economics that investors' capital will enable you to prove.

This is also the moment when the choice of investor matters most, because an early-stage specialist who backs vision is a different kind of investor from a later-stage fund that only moves on proof.

Jay Dickieson Founder and Managing Director, PitchBuilder

The better the metrics, the faster the raise. If you do not have the metrics yet, you have to sell the vision and tell a credible story about how you will get them. Finding the right investor is critical here.

Active UK SaaS investors: a free preview

Below are five active UK funds with a genuine SaaS and enterprise software track record, spanning early stage through growth. This is a small preview to show the kind of investor in the wider list. Each is a fund rather than an individual angel, and each has backed recognisable software companies.

How to use this list to actually get funded

A list is only the starting point. The founders who raise quickly filter it down to investors who match their stage, their metrics and the cheque size they need, then build a short, well-researched target list rather than emailing everyone. Five aligned investors beat fifty random ones, because every meeting with a fund that does not move at your stage is time taken from one that does.

It also pays to make sure your materials carry the numbers well before you start. A SaaS pitch that buries the metrics, or quotes the wrong ones for its stage, fails with exactly the investors you most want. If you want a frank, slide-by-slide read on whether your pitch deck makes the right case to SaaS investors, PitchBuilder offers a pitch deck review service that tells you what an investor will think before they think it.

When your deck is ready and your target list is tight, the last piece is reach. The full database below gives you the application route and current contact details for every active investor, so you can approach the relevant ones directly, warm introduction or not.

Frequently asked questions

Who are the most active SaaS investors in the UK?
Active UK SaaS investors include B2B software specialists such as Notion Capital, Dawn Capital, Eight Roads and Oxx, early-stage funds like Episode 1 Ventures, and growth investors like Highland Europe. Which one fits depends on your stage, your metrics and the cheque size you need, rather than the fund's profile.

What metrics do SaaS investors look for?
It depends on your stage. If you are pre-product or pre-revenue, investors want metrics built on a logical hypothesis that the funding will let you test. Once you have a live product and revenue, your actual numbers become critical, and ARR is often the first thing an investor asks about before they even open the deck. Growth rate and retention sit close behind.

Do UK SaaS investors fund pre-revenue startups?
Yes, at pre-seed and seed. Before revenue, you are selling the vision and a credible plan for how the funding will prove the metrics that unlock your next round. The clearer that plan, and the more it works backwards from what each future round will require, the easier the raise.

How much are UK SaaS startups raising in 2026?
Capital is available but concentrating on proven businesses. In 2025, more than 70% of UK venture capital went into rounds above £25m, the highest share in a decade, as investors backed companies with strong metrics and clear traction over unproven ones. That makes your numbers, and your story about them, more important than ever.

How do I find SaaS investors that match my stage and metrics?
Define your stage, your metrics and the cheque size you need, then filter for investors who back companies at that point. The PitchBuilder UK investor database lets you filter more than 650 active investors by stage, sector and cheque size, with direct application links and contacts, so you only approach funds aligned with where your SaaS business actually is.

Should I target SaaS specialists or generalist investors?
Specialists understand SaaS metrics instinctively, which can make conversations faster and more productive. Generalist funds with a strong software portfolio behave much the same way. What matters is that the investor backs businesses at your stage and is comfortable with the numbers that define a SaaS company.