Sending money from one country to another — either because you are a business paying someone for a service, or a family member working abroad and sending money back home, or something in between — is a huge business, worth some $700 million annually. Today, a London startup called Currencycloud, which has built a set of remittance APIs that let any financial business integrate money transfer services into its platform, is announcing that it has raised $80 million to tap into that opportunity, and to help take on the Western Unions of the world.

To date, more than $50 billion has been transferred between some 180 countries using Currencycloud’s 85 APIs, which cover areas like inbound money collection (helping clients get paid), foreign exchange, outgoing payments, digital wallet services managing multiple currencies and more.

Mike Laven, Currencycloud’s American CEO (but not the founder: those are Nigel Verdon, Steve Lemon, Rich Arundel, Dave Mason and Nick Bourner), tells TechCrunch that the company has some 350 companies using its APIs as of the end of 2019, and it employs 230 people, but you are almost certainly never going to see it, even if you’ve used it.

“No one is doing what we’re doing in terms of the model we have,” Laven said, referring to what he describes as an “embedded model” where transfer is seamlessly embedded into its customers’ platform and workflow. “I’m not competing with our customers. My brand is invisible. We think we’re still the only one that has that kind of solution.”

This round, a Series E, has a number of heavy hitters among the startup’s new strategic investors. They include Visa, the World Bank Group’s International Finance Corporation, French bank BNP Paribas, the SBI Group (the Japanese giant that was once a part, but now independent, of SoftBank) and Thailand’s Siam Commercial Bank. With that, Laven said that Asia will be a big focus for Currencycloud in the year ahead, with a new office in Singapore to tap into providing money-transfer APIs to businesses in the region.

At least one of its newest investors, Visa, is also integrating Currencycloud’s services into its own. Existing investors Sapphire Ventures, Notion Capital, GV (formerly known as Google Ventures, which led its Series D), Accomplice and Anthemis are also participating.

As for the valuation, Laven said it was not being disclosed — not the focus for the company at the moment, building is — but he confirmed that the pre-money amount was higher than when it previously raised. Reliable sources have confirmed to us that it’s actually around the half-billion dollar mark.

This is a huge leap for the company. For some context, we first reported the news that Currencycloud was raising last summer, and at the time, when it had closed about $40 million of the funding, PitchBook estimated the pre-money valuation at $114 million and post-money at $184 million. That would imply that this Series E puts the London-based startup’s valuation at around $220 million (and took somewhat longer to close than originally planned), although it has had a much bigger leap, it seems, in part because of its growth. To date, Currencycloud has raised $140 million.

The startup has been around since 2012 and was early to identify the opportunity in the money-transfer market.

The trend of globalisation in the world economy has led to a sharp rise in the pace of remittances, helped by the expansion of the internet and smartphone usage — which has spelled opportunity for companies leveraging the latter to enter the market. And in terms of the companies providing money-transfer services, while there are some notable legacy names like Western Union and MoneyGram, by and large it’s a fragmented market — leaving an opportunity for many more hopefuls to get involved.

But on top of all that, the system is largely expensive and inefficient — meaning there was a lucrative opportunity for a company to come along and provide an easy way to plug into the rails — say, by way of APIs — to build these services (not unlike what companies like Adyen or Stripe have done for e-commerce payments).

All roads, effectively, led to Currencycloud, and it’s seen business expand. To date, Currencycloud says that it has processed more than $50 billion in cross-border payments, with the proliferation of so-called neobanks (or challenger banks, going head-to-head with traditional institutions in the business of deposits and lending using all-digital, mobile-first platforms) helping it along. Customers include Monzo, Moneze, Starling, Revolut and Dwolla — alongside the likes of bigger players like Visa now also getting involved.

“I’m delighted to be joining the board of such an exciting technology company,” added Colleen Ostrowski, SVP and treasurer at Visa, in a statement. “Currencycloud is re-shaping the way that the platforms of the future are moving money around the world, and there is huge potential for the company to drive further innovation in the cross-border payments industry.”

Updated with more detail on valuation.