Company lists · Data refreshed September 2026
Top 25 Api-first fintech companies worldwide
RevenueBase identified 2,101 api-first fintech companies worldwide as of September 2026 and tracks 226,588 professional contacts across them, including 84,684 with verified work emails. The United States is the largest market and London the largest hub.
This list covers api-first fintech companies worldwide, 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 27, 2026. Country and city lists for api-first fintech companies follow the table.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 api-first fintech companies worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 38,885 contacts → | ||||
Indirect evidence “Unlocking financial technology.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 2 | 16,636 contacts → | ||||
Indirect evidence “People deserve more from their money.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 3 | 10,605 contacts → | ||||
Indirect evidence “Nu is one of the largest digital financial services platforms in the world, serving 135 million customers across Brazil, Mexico, and Colombia.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 4 | 7,843 contacts → | ||||
Indirect evidence “Intellect Design Arena Ltd is a global leader in enterprise-grade financial technology, delivering composable and intelligent solutions to forward-looking financial institutions…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 5 | 6,759 contacts → | ||||
Indirect evidence “Jack Henry (Nasdaq: JKHY) is a well-rounded financial technology company that strengthens the connections between people and their financial institutions through technology and…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 6 | 6,608 contacts → | ||||
Partial evidence “First Data is now Fiserv (NASDAQ:FISV).” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 7 | 6,534 contacts → | ||||
Indirect evidence “Oracle helps banks simplify processes, innovate on demand, and drive predictive insight.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 8 | 5,233 contacts → | ||||
Indirect evidence “Adyen (AMS: ADYEN) is the financial technology platform of choice for leading companies.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 9 | 5,151 contacts → | ||||
Indirect evidence “ჩვენ ვართ თიბისი - წამყვანი ფინანსური ინსტიტუტი რეგიონში, სადაც გამბედავი და მიზანსწრაფული გუნდი, ჩვენს მისიას ვასრულებთ და ადამიანების ცხოვრებას ვამარტივებთ.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 10 | 3,202 contacts → | ||||
Indirect evidence “SBS is a global financial technology company that’s helping banks and the financial services industry to reimagine how to operate in an increasingly digital world.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 11 | 2,834 contacts → | ||||
Partial evidence “Q2 is a financial experience company dedicated to providing digital banking and lending solutions to banks, credit unions, alternative finance, and fintech companies in the U.S.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 12 | 2,146 contacts → | ||||
Partial evidence “Riverty is a FinTech company that offers a new perspective on financial solutions.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 13 | 2,075 contacts → | ||||
Indirect evidence “Headquartered in San Francisco, California, Zeta was named by Celent in 2023 as being among the likeliest partners for US banks and credit unions looking to modernize to a…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 14 | 2,055 contacts → | ||||
Indirect evidence “Nexi has the scale, geographical reach, and capabilities to drive the evolution of digital payments across Europe.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 15 | 1,821 contacts → | ||||
Indirect evidence “An award-winning global financial technology innovator powering credit, debit, prepaid, core banking, and money movement solutions, i2c unifies banking and payments in an…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 16 | 1,797 contacts → | ||||
Indirect evidence “Founded in 1987 to provide Information Technology services to the finance sector, Intertech has been operating within DenizBank Financial Services Group since 2002.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 17 | 1,605 contacts → | ||||
Indirect evidence “Maya is the all-in-one money platform that is bringing Filipinos bolder ways to master their money.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 18 | 1,587 contacts → | ||||
Indirect evidence “Silverlake is a global leader in financial technology, providing enterprise solutions to over 370 customers across 80 countries with 100% successful project implementation for…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 19 | 1,560 contacts → | ||||
Partial evidence “Fintech happens here!” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 20 | 1,452 contacts → | ||||
Indirect evidence “Dotin is a software company, that advances financial inclusion through technology, prepares infrastructural platforms for financial institutions via technology, and provides…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 21 | 1,215 contacts → | ||||
Indirect evidence “About Green Dot Green Dot Corporation (NYSE: GDOT) is a financial technology platform and registered bank holding company that builds banking and payment solutions to create…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 22 | 1,137 contacts → | ||||
Indirect evidence “SIA is now Nexi, part of Nexi Group.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 23 | 1,087 contacts → | ||||
Indirect evidence “At the forefront of the financial revolution, Topaz is a technological powerhouse specializing in digital financial solutions, standing out as the undisputed leader in the…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 24 | 1,084 contacts → | ||||
Partial evidence “MNT-Halan, Egypt’s first unicorn, was founded in 2018 in Egypt, with a mission to revolutionize access to financial services through technology.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 25 | 1,046 contacts → | ||||
Indirect evidence “Neo is a Canadian financial technology company built to help people get what they’ve earned.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: api-first fintech companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names api-first fintech companies.
- Partial evidence
- Its own public description names part of api-first fintech companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name api-first fintech companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 2,101 api-first fintech companies worldwide
See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 84,684 reachable decision-makers.
Free signup · no credit card
Api-first fintech companies worldwide at a glance
As of Sep 27, 2026Companies by employee count
Email recency is reported on each country list linked below.
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 api-first fintech companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search 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 Smart Search, the natural-language company search available to every RevenueBase user.
- Coverage
- Every country. Country and city lists for api-first fintech companies are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “api-first fintech companies”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names api-first fintech companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among api-first fintech companies, and records with no verified work email.
- 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 its RevenueBase Smart Search 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, 84,684 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 27, 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.
Api-first fintech companies by location
11 lists · largest firstEvery Api-first fintech companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Api-first fintech companies based in the United States301
- Api-first fintech companies based in India253
- Api-first fintech companies based in the United Kingdom146
- Api-first fintech companies based in Brazil142
- Api-first fintech companies based in Nigeria48
- Api-first fintech companies based in the United Arab Emirates44
- Api-first fintech companies based in Türkiye38
- Api-first fintech companies based in Canada36
- Api-first fintech companies based in Germany35
- Api-first fintech companies based in Australia33
- Api-first fintech companies based in South Africa31
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names api-first fintech companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many api-first fintech companies are there worldwide?
RevenueBase identified 2,101 api-first fintech companies worldwide 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?
FIS, headquartered in Jacksonville, tops this list with the largest team on record.
Which country has the most api-first fintech companies?
The United States leads with 301 companies, followed by India (253) and the United Kingdom (146). Every api-first fintech companies list by country and city is linked on this page.
Which city has the most api-first fintech companies?
London leads with 109 headquartered companies, followed by Sao Paulo (66) and Singapore (47).
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 84,684 verified decision-maker contacts tracked across these 2,101 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 27, 2026.
Ready to reach these companies? Verified emails and direct dials for all 2,101 api-first fintech companies worldwide. Start with a free account, no credit card.
Download this list →Related lists
Browse the directory
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 Smart Search, 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.