Company lists · Data refreshed September 2026
Top 25 Fintech api providers based in the United Kingdom
RevenueBase identified 104 fintech api providers headquartered in the United Kingdom as of September 2026 and tracks 2,753 professional contacts across them, including 1,182 with verified work emails and 135 with mobile numbers. London is the largest hub.
This list covers fintech api providers headquartered in the United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, how directly it supports the match, and when it was last checked. Data refreshed September 2, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest fintech api providers based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 752 | ||||
“Build Bold.” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 2 | 435 | ||||
“We are a company on a mission to build a global financial ecosystem that empowers individuals and businesses to have more control over their financial lives.” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 3 | 189 | ||||
“OpenPayd is building the universal financial infrastructure for the digital economy.” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 4 | 118 | ||||
“Embed bank accounts, payments, and all kinds of financial products quickly via our simple API.” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 5 | 115 | ||||
“Yapily is Europe’s leading open banking infrastructure platform solving a fundamental problem in financial services today: access.” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 6 | 98 | ||||
“BKN301 is a helping Banks and Fintechs, and.” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 7 | 74 | ||||
“xpate is the payments provider built for fintechs and digital SMEs that makes it easier to pay, get paid and keep money flowing.” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 8 | 66 | ||||
“Ozone API is the leading standards based platform that handles the complexity of open banking, making it easy for any financial institution to meet both regulatory and commercial…” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 9 | 66 | ||||
“Yaspa is making instant payments personal.” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 10 | 61 | ||||
“TranSwap is an award-winning fintech provider that's customisable to your business needs.” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 11 | 47 | ||||
“Blinqpay is made up of a team of financial experts, entrepreneurs and engineers passionate about driving innovation in the African Fintech space.” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 12 | 38 | ||||
“Monevo, a TransUnion company, is an award-winning B2BC personal credit platform and API focused on improving access to credit in what is currently a highly fragmented marketplace.” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 13 | 37 | ||||
“Triver provides small businesses with instant capital in a click.” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 14 | 32 | ||||
“At Crezco, we’re redefining how businesses move money.” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 15 | 30 | ||||
“Ecospend is a financial data and payments platform built exclusively for Open Finance since the inception of PSD2.” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 16 | Simplify SynergyPartial evidence | 26 | |||
“Simplify Synergy is a transformative FinTech startup that provides innovative technological solutions.” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 17 | NuapayIndirect evidence | 22 | |||
“Nuapay is a pioneer of Open Banking and the industry’s leading Account-2-Account payment environment.” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 18 | PannovateIndirect evidence | 21 | |||
“Pannovate is a Banking-as-a-Service platform and orchestration layer that empowers financial and non-financial organisations to deliver seamless digital experiences and embedded…” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 19 | MERGEStrong evidence | 18 | |||
“Merge is a fintech that is merging stablecoins and instant payment rails in one API.” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 20 | TellerPartial evidence | 18 | |||
“Teller is the API for bank accounts.” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 21 | Zeux IT ServicesPartial evidence | 16 | |||
“Zeux IT Services was born from growing need of fintech infrastructure solutions in the industry.” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 22 | 16 | ||||
“Open Banking and Global Real-time Payment Infrastructure” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 23 | 14 | ||||
“We provide a single point of integration to all your payment needs.” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 24 | 14 | ||||
“Finular is a leading multinational FinTech (Financial Technology) group operating across the US, UK, Europe and MENA.” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 25 | 13 | ||||
“Transforming financial futures.” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 104 fintech api providers based in the United Kingdom
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Fintech api providers based in the United Kingdom at a glance
As of Sep 2, 2026Companies by employee count
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among fintech api providers, so some rows will be adjacent to the category rather than pure plays. The description and evidence rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in the United Kingdom whose own description of what they do matches “fintech api providers”. Matching reads each company's description, not its industry code or its name.
- What we exclude
- Companies whose own description does not clearly place them among fintech api providers, and records with no verified work email. Companies headquartered outside United Kingdom are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and an evidence rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 1,182 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 2, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Fintech api providers by metro
- Fintech api providers in London81
Frequently asked
How many fintech api providers are there based in the United Kingdom?
RevenueBase identified 104 fintech api providers headquartered in the United Kingdom as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
RAPYD, headquartered in London, tops this list with the largest team on record.
Which city has the most fintech api providers?
London leads with 81 headquartered companies, followed by Edinburgh (3) and Bournemouth (1).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 1,182 verified decision-maker contacts tracked across these 104 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 2, 2026.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
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