Company lists · Data refreshed September 2026

Top 25 Event stream processing platforms worldwide

RevenueBase identified 225 event stream processing platforms worldwide as of September 2026 and tracks 13,786 professional contacts across them, including 6,125 with verified work emails. The United States is the largest market and San Francisco the largest hub.

This list covers event stream processing platforms 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 28, 2026. Country and city lists for event stream processing platforms 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 28, 2026 86% judged on-target in blind review
225Companies
13,786Contacts tracked
6,125Verified emails
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The 25 largest event stream processing platforms worldwide

Ranked by team size
Top 25 of 225 event stream processing platforms worldwide, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to event stream processing platforms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceMountain View, CA, United StatesHQ checked Sep 28, 20261,001-5,0003,377 contacts →

Indirect evidence

“Confluent is pioneering a fundamentally new category of data infrastructure focused on data in motion.”

Source: RevenueBase Database · checked Sep 28, 2026
2Indirect evidenceSanta Clara, CA, United StatesHQ checked Sep 28, 20261,001-5,0002,087 contacts →

Indirect evidence

“TIBCO, a business unit of Cloud Software Group, has helped global enterprises solve their most complex business challenges for more than 25 years.”

Source: RevenueBase Database · checked Sep 28, 2026
3Indirect evidenceBoston, MA, United StatesHQ checked Sep 28, 20261,001-5,0001,780 contacts →

Indirect evidence

“InterSystems, a creative data technology provider, delivers a unified foundation for next-generation applications for healthcare, finance, manufacturing, and supply chain…”

Source: RevenueBase Database · checked Sep 28, 2026
4Indirect evidenceChennai, IndiaHQ checked Sep 28, 2026501-1,0001,433 contacts →

Indirect evidence

“Mobius transforms the way data works for you.”

Source: RevenueBase Database · checked Sep 28, 2026
5Indirect evidenceWeybridge, United KingdomHQ checked Sep 28, 2026501-1,000819 contacts →

Indirect evidence

“Ab Initio transforms how companies work with data, from data discovery and strategy through implementation and governance.”

Source: RevenueBase Database · checked Sep 28, 2026
6Partial evidenceKanata, ON, CanadaHQ checked Sep 28, 2026501-1,000545 contacts →

Partial evidence

“Solace is the Real-Time Data and Agentic AI Platform.”

Source: RevenueBase Database · checked Sep 28, 2026
7Indirect evidenceSan Francisco, CA, United StatesHQ checked Sep 28, 2026201-500522 contacts →

Indirect evidence

“The core of all AI, business intelligence and applications is data, various bits and bytes that come in all different formats.”

Source: RevenueBase Database · checked Sep 28, 2026
8Partial evidenceSunnyvale, CA, United StatesHQ checked Sep 28, 2026201-500285 contacts →

Partial evidence

“Real-Time Innovations (RTI) is the data streaming company for intelligent distributed systems.”

Source: RevenueBase Database · checked Sep 28, 2026
9Strong evidencePalo Alto, CA, United StatesHQ checked Sep 28, 2026201-500247 contacts →

Strong evidence

“Striim offers a leading real-time data streaming and integration platform, built by the same team behind Oracle GoldenGate.”

Source: RevenueBase Database · checked Sep 28, 2026
10Partial evidenceSan Francisco, CA, United StatesHQ checked Sep 28, 2026201-500155 contacts →

Partial evidence

“InfluxData is the creator of InfluxDB, the leading time series platform used to collect, store, and analyze all time series data at any scale.”

Source: RevenueBase Database · checked Sep 28, 2026
11Indirect evidencePalo Alto, CA, United StatesHQ checked Sep 28, 202651-200150 contacts →

Indirect evidence

“Hazelcast is a leading software provider powering mission-critical applications that move the economy.”

Source: RevenueBase Database · checked Sep 28, 2026
12Indirect evidenceSan Francisco, CA, United StatesHQ checked Sep 28, 202651-200131 contacts →

Indirect evidence

“RudderStack's agentic CDP delivers self-serve marketing activation from a solid data foundation like no other solution on the market, with agentic capabilities covering the entire…”

Source: RevenueBase Database · checked Sep 28, 2026
13Indirect evidenceNew York, NY, United StatesHQ checked Sep 28, 202651-200119 contacts →

Indirect evidence

“GigaSpaces helps enterprises apply AI to real-time, structured operational data, enabling spontaneous, natural language conversations that accelerate decision-making, improve…”

Source: RevenueBase Database · checked Sep 28, 2026
14Partial evidenceBengaluru, IndiaHQ checked Sep 28, 202651-200117 contacts →

Partial evidence

“At Zeliot, we are redefining the future of real-time data streaming, empowering enterprises and developers to unlock the full potential of their data with speed, simplicity, and…”

Source: RevenueBase Database · checked Sep 28, 2026
15Partial evidenceMountain View, CA, United StatesHQ checked Sep 28, 202651-200113 contacts →

Partial evidence

“StarTree, powered by Apache Pinot™, is the platform for continuous insights at scale.”

Source: RevenueBase Database · checked Sep 28, 2026
16Indirect evidenceAllendale, NJ, United StatesHQ checked Sep 28, 202651-200105 contacts →

Indirect evidence

“DolphinDB is dedicated to developing the most powerful and advanced time-series database.”

Source: RevenueBase Database · checked Sep 28, 2026
17Indirect evidence新宿区, JapanHQ checked Sep 28, 202651-20094 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 28, 2026
18Partial evidenceSan Mateo, CA, United StatesHQ checked Sep 28, 2026n/a73 contacts →

Partial evidence

“On July 1, 2024, IBM acquired StreamSets, a real-time data integration company specializing in streaming structured, unstructured and semistructured data across hybrid multicloud…”

Source: RevenueBase Database · checked Sep 28, 2026
19Partial evidencePalo Alto, United StatesHQ checked Sep 28, 202651-20069 contacts →

Partial evidence

“An integrated end-to-end big data transformation platform.”

Source: RevenueBase Database · checked Sep 28, 2026
20Indirect evidenceMünchen, GermanyHQ checked Sep 28, 202651-20065 contacts →

Indirect evidence

“Data Reply, as part of the Reply Group, offers a wide range of services to help customers to become data driven.”

Source: RevenueBase Database · checked Sep 28, 2026
21Indirect evidenceEl Segundo, CA, United StatesHQ checked Sep 28, 202651-20064 contacts →

Indirect evidence

“Sift is transforming how modern machines are built and operated.”

Source: RevenueBase Database · checked Sep 28, 2026
22Strong evidenceSunnyvale, CA, United StatesHQ checked Sep 28, 202651-20060 contacts →

Strong evidence

“StreamNative is the Streaming Intelligence Platform for the AI era.”

Source: RevenueBase Database · checked Sep 28, 2026
23Indirect evidenceNew York, NY, United StatesHQ checked Sep 28, 202651-20059 contacts →

Indirect evidence

“Materialize is the live context layer for agents and apps.”

Source: RevenueBase Database · checked Sep 28, 2026
24Strong evidenceSan Francisco, CA, United StatesHQ checked Sep 28, 202651-20058 contacts →

Strong evidence

“Kurrent provides an event-native data platform that feeds real-time, business-critical data with historical context in fine-grained streams from origination to destination…”

Source: RevenueBase Database · checked Sep 28, 2026
25Strong evidenceUtrecht, NetherlandsHQ checked Sep 28, 202611-5044 contacts →

Strong evidence

“Axual provides a Enterprise Streaming Platform for mid-size to large organizations.”

Source: RevenueBase Database · checked Sep 28, 2026

Showing 25 of 225 event stream processing platforms worldwide

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Event stream processing platforms worldwide at a glance

As of Sep 28, 2026
44.4%Verified-email coverage
61.3Average contacts per company
11-50Median size (employees)
4.0%Largest-city concentration · San Francisco
Sep 28, 2026Page data refreshed

Companies by employee count

1-10
102
11-50
79
51-200
27
201-500
7
501-1,000
3
1,001-5,000
5
10001+
2

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 event stream processing platforms, 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 event stream processing platforms are linked below.
What qualifies
Companies worldwide whose own description of what they do matches “event stream processing platforms”. 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 event stream processing platforms), 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 event stream processing platforms, 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, 6,125 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 28, 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.

Event stream processing platforms by location

1 lists · largest first

Every Event stream processing platforms 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 event stream processing platforms, 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 event stream processing platforms are there worldwide?

RevenueBase identified 225 event stream processing platforms 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?

Confluent, headquartered in Mountain View, tops this list with the largest team on record.

Which country has the most event stream processing platforms?

The United States leads with 81 companies. Every event stream processing platforms list by country and city is linked on this page.

Which city has the most event stream processing platforms?

San Francisco leads with 9 headquartered companies, followed by New York (7) and London (6).

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 6,125 verified decision-maker contacts tracked across these 225 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 28, 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.