Company lists · Data refreshed September 2026
Top 25 Stream processing companies worldwide
RevenueBase identified 216 stream processing companies worldwide as of September 2026 and tracks 8,840 professional contacts across them, including 3,892 with verified work emails. The United States is the largest market and San Francisco the largest hub.
This list covers stream processing 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 22, 2026. Country and city lists for stream processing 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 stream processing companies worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 3,377 contacts → | ||||
Indirect evidence “Confluent is pioneering a fundamentally new category of data infrastructure focused on data in motion.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 2 | 2,087 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 22, 2026Thanks. The Data Team will review it. | |||||
| 3 | 522 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 22, 2026Thanks. The Data Team will review it. | |||||
| 4 | 268 contacts → | ||||
Indirect evidence “Seeq Corporation develops software and services that accelerate industrial process analytics on industrial process data.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 5 | 247 contacts → | ||||
Partial 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 22, 2026Thanks. The Data Team will review it. | |||||
| 6 | 155 contacts → | ||||
Indirect 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 22, 2026Thanks. The Data Team will review it. | |||||
| 7 | 131 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 22, 2026Thanks. The Data Team will review it. | |||||
| 8 | 117 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 22, 2026Thanks. The Data Team will review it. | |||||
| 9 | 113 contacts → | ||||
Indirect evidence “StarTree, powered by Apache Pinot™, is the platform for continuous insights at scale.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 10 | 94 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 11 | 78 contacts → | ||||
Indirect evidence “We are the original creators of Apache Flink®.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 12 | 73 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 22, 2026Thanks. The Data Team will review it. | |||||
| 13 | 69 contacts → | ||||
Indirect evidence “An integrated end-to-end big data transformation platform.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 14 | 65 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 22, 2026Thanks. The Data Team will review it. | |||||
| 15 | 59 contacts → | ||||
Indirect evidence “Materialize is the live context layer for agents and apps.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 16 | 58 contacts → | ||||
Partial 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 22, 2026Thanks. The Data Team will review it. | |||||
| 17 | 39 contacts → | ||||
Indirect evidence “GetInData | Part of Xebia was founded by ex-Spotify engineers with multi-year experience in Big Data technologies.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 18 | 35 contacts → | ||||
Indirect evidence “Connect, Query, and Visualize ALL your data faster than ever before with our patented technology Blue Fusion.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 19 | 34 contacts → | ||||
Partial evidence “Since 2016, Lenses.io has helped developers to power the world’s largest companies with real-time data, by making data streams easier for engineers to work with.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 20 | 32 contacts → | ||||
Partial evidence “Estuary helps organizations streamline their data integration for AI, analytics, and operational workflows without the constraints of a rigid architecture.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 21 | 27 contacts → | ||||
Indirect evidence “Gamma Analytics is a Big Data management software company specializing in solutions to process data in real time.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 22 | 27 contacts → | ||||
Indirect evidence “We are a small startup in Bhubaneswar, Odisha (INDIA) who pride themselves on delivering solutions that are designed to process huge data at blazing speeds.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 23 | 25 contacts → | ||||
Indirect evidence “Pinax specializes in cutting-edge infrastructure, offering real-time data indexing services and customized solutions for enterprises and various clients.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 24 | 23 contacts → | ||||
Partial evidence “Onum empowers enterprises to derive value from data in stream, helping IT and Security teams move at the speed of business.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 25 | 23 contacts → | ||||
Partial evidence “Founded in 2015, Nstream (formally known as Swim) enables organizations to build open-source, full-stack applications directly on top of streaming data, providing real-time…” Source: RevenueBase Database · checked Sep 22, 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: stream processing 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 stream processing companies.
- Partial evidence
- Its own public description names part of stream processing companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name stream processing 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 216 stream processing companies worldwide
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Stream processing companies worldwide at a glance
As of Sep 22, 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 stream processing 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 stream processing companies are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “stream processing 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 stream processing 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 stream processing 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, 3,892 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 22, 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.
Stream processing companies by location
1 lists · largest firstEvery Stream processing companies 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 stream processing 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 stream processing companies are there worldwide?
RevenueBase identified 216 stream processing 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?
Confluent, headquartered in Mountain View, tops this list with the largest team on record.
Which country has the most stream processing companies?
The United States leads with 87 companies. Every stream processing companies list by country and city is linked on this page.
Which city has the most stream processing companies?
San Francisco leads with 10 headquartered companies, followed by New York (8) and London (7).
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 3,892 verified decision-maker contacts tracked across these 216 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 22, 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.