Company lists · Data refreshed September 2026
Top 25 Api integration service providers worldwide
RevenueBase identified 191 api integration service providers worldwide as of September 2026 and tracks 1,880 professional contacts across them, including 685 with verified work emails. The United States is the largest market and Chennai the largest hub.
This list covers api integration service providers 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 19, 2026. Country and city lists for api integration service providers 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 integration service providers worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 176 contacts → | ||||
Indirect evidence “Located in Luxembourg, France, Germany, Italy, Switzerland, Portugal, Costa Rica, Shanghaï and Hong Kong, Cap4 Lab helps customers unlock their potential in the development of new…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 2 | 123 contacts → | ||||
Indirect evidence “With more than 180 specialists, we make the most of your digital transformation.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 3 | 108 contacts → | ||||
Partial evidence “We’re integration people at heart.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 4 | 99 contacts → | ||||
Partial evidence “Paragon is the leading integration infrastructure platform for AI.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 5 | 94 contacts → | ||||
Partial evidence “Conexa is a Long-Term Tech Partner that develops custom solutions and integrations to boost products and revenue.+100 Clients (Fiserv, UBER, Klaviyo, Shopify, Klarna…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 6 | 82 contacts → | ||||
Indirect evidence “Integrella is a specialist IT services company with extensive experience across UK sectors.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 7 | 73 contacts → | ||||
Indirect evidence “Company Profile- General Introduction Of Company ConstaCloud Pvt.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 8 | 40 contacts → | ||||
Partial evidence “MuleCraft is a pure-play integration services company helping enterprises connect systems, data and applications for seamless digital operations.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 9 | 38 contacts → | ||||
Strong evidence “As a leading digital solutions platform, Inzint is your one-stop destination for technology consulting, software development, and seamless API integrations.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 10 | 38 contacts → | ||||
Strong evidence “RESKOM is your trusted business partner in the areas of API-led integration, Enterprise Application Integration, Data Integration, and API Management, delivering seamless digital…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 11 | 35 contacts → | ||||
Indirect evidence “BeeXSAP20163SAPSAP SAP” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 12 | 34 contacts → | ||||
Strong evidence “Data Migration & Integration as a Service (IaaS) Migration | SaaS | API & Microservices | AI & ML Arbaan GT is a trusted partner for enterprises looking to scale efficiently and…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 13 | 33 contacts → | ||||
Partial evidence “We are specialists in Data and Systems Integration, our purpose is to deliver the best experience in integrations that your company can ever have.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 14 | 32 contacts → | ||||
Strong evidence “API People is a team of highly skilled integration architects, developers, and project managers.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 15 | 29 contacts → | ||||
Indirect evidence “For the teams still importing and exporting data between systems, we take a people-first approach, dig into your unique processes, and build automated solutions so you can ditch…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 16 | 27 contacts → | ||||
Partial evidence “We're the data integration and migration experts The Intodata team ensures that your applications understand each other.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 17 | 23 contacts → | ||||
Partial evidence “Archers provides consulting expertise to design, build and evolve the integration landscape of customers to meet the challenges of today’s connected companies.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 18 | 19 contacts → | ||||
Strong evidence “SynergySoft is a Swiss integration consultancy based in Geneva, helping organizations connect applications, data, and AI through modern API-led architectures.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 19 | 19 contacts → | ||||
Partial evidence “Openapi.com is the largest API marketplace in Europe.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 20 | 18 contacts → | ||||
Strong evidence “iPaaS.com is an API-first integration platform that centralizes, standardizes, and activates data across your entire business.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 21 | 18 contacts → | ||||
Indirect evidence “DaaS was founded on the principle that nobody - no matter their level of technical expertise, should be excluded from competing in a 21st-century marketplace.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 22 | 16 contacts → | ||||
Indirect evidence “Established in BKY Technologies is an Alberta-owned IT services company, software developer and application program developer that provides remote and on-site service from our…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 23 | 14 contacts → | ||||
Partial evidence “Red Function OÜ is a Tallinn-based software development and systems integration partner helping businesses turn technology into measurable results.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 24 | 14 contacts → | ||||
Strong evidence “Acqua, brings an innovative and proven approach to how organizations design, build, and manage their integrations and APIs so they can modernize legacy applications, move to the…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 25 | 13 contacts → | ||||
Strong evidence “Integrations, API management, Data management, Master Data, Machine Learning, Cloud Architectures, Service Perfomance - We love the data layer!” Source: RevenueBase Database · checked Sep 19, 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 integration service providers. 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 integration service providers.
- Partial evidence
- Its own public description names part of api integration service providers, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name api integration service providers. 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 191 api integration service providers worldwide
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Api integration service providers worldwide at a glance
As of Sep 19, 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 integration service providers, 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 integration service providers are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “api integration service providers”. 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 integration service providers), 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 integration service providers, 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, 685 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 19, 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 integration service providers by location
1 lists · largest firstEvery Api integration service providers list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
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 integration service providers, 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 integration service providers are there worldwide?
RevenueBase identified 191 api integration service providers 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?
Cap4 LAB, headquartered in Bertrange, tops this list with the largest team on record.
Which country has the most api integration service providers?
The United States leads with 43 companies. Every api integration service providers list by country and city is linked on this page.
Which city has the most api integration service providers?
Chennai leads with 4 headquartered companies, followed by Sao Paulo (4) and Hyderabad (3).
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 685 verified decision-maker contacts tracked across these 191 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 19, 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 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.