Company lists · Data refreshed September 2026

Top 25 Web performance tools worldwide

RevenueBase identified 197 web performance tools worldwide as of September 2026 and tracks 900 professional contacts across them, including 282 with verified work emails. The United States is the largest market and London the largest hub.

This list covers web performance tools 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 web performance tools 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 22, 2026 86% judged on-target in blind review
197Companies
900Contacts tracked
282Verified emails
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The 25 largest web performance tools worldwide

Ranked by team size
Top 25 of 197 web performance tools worldwide, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to web performance tools: 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 evidenceHamburg, GermanyHQ checked Sep 22, 202651-20077 contacts →

Indirect evidence

“Speed Kit is the all-in-one page speed tool for sites with 300+ million users.”

Source: RevenueBase Database · checked Sep 22, 2026
2Indirect evidenceAustin, TX, United StatesHQ checked Sep 22, 202651-20067 contacts →

Indirect evidence

“Silktide makes software to understand and improve websites, covering accessibility, SEO, UX, data privacy, and more.”

Source: RevenueBase Database · checked Sep 22, 2026
3Indirect evidenceLyon, FranceHQ checked Sep 22, 202611-5046 contacts →

Indirect evidence

“Founded in 2014 in the beautiful Lyon, France, WP Media is the company behind WP Rocket, Imagify, RocketCDN and BackWPup.”

Source: RevenueBase Database · checked Sep 22, 2026
4Partial evidenceMilan, ItalyHQ checked Sep 22, 202611-5036 contacts →

Partial evidence

“Kleecks is an innovative SaaS platform that optimises performance marketing activities, improves website health and speed in real-time, and has a significant impact on businesses…”

Source: RevenueBase Database · checked Sep 22, 2026
5Partial evidenceSofia, BulgariaHQ checked Sep 22, 202611-5032 contacts →

Partial evidence

“We believe everyone should have an easy way to achieve world-class performance for their website.”

Source: RevenueBase Database · checked Sep 22, 2026
6Partial evidenceParis, FranceHQ checked Sep 22, 202611-5029 contacts →

Partial evidence

“Fasterize is much more than just a web optimization solution.”

Source: RevenueBase Database · checked Sep 22, 2026
7Partial evidenceMinnetonka, MN, United StatesHQ checked Sep 22, 202651-20026 contacts →

Partial evidence

“Our mission is to give our customers cutting edge features such as “image matching” within a real browser, element level trend charting, and video capture of website and web…”

Source: RevenueBase Database · checked Sep 22, 2026
8Indirect evidenceNewtown Square, PA, United StatesHQ checked Sep 22, 202611-5017 contacts →

Indirect evidence

“LiteSpeed Technologies was founded in early 2002 by a team of engineers led by George Wang.”

Source: RevenueBase Database · checked Sep 22, 2026
9Partial evidenceStockholm, SwedenHQ checked Sep 22, 202611-5015 contacts →

Partial evidence

“Stockholm-started k6, simplifies and automate load and performance testing for agile software development teams.”

Source: RevenueBase Database · checked Sep 22, 2026
10Indirect evidenceUnited StatesHQ checked Sep 22, 20261-1011 contacts →

Indirect evidence

“We build products like FlyingPress and FlyingCDN”

Source: RevenueBase Database · checked Sep 22, 2026
11Indirect evidenceSheridan, WY, United StatesHQ checked Sep 22, 202651-20011 contacts →

Indirect evidence

“WebsiteSpeedy.com | Make your website load at lightening fast speed in 5 minutes Is your website struggling with slow loading times & subpar user experience?”

Source: RevenueBase Database · checked Sep 22, 2026
12Indirect evidenceLeeds, United KingdomHQ checked Sep 22, 202611-5010 contacts →

Indirect evidence

“RapidSpike believes everyone expects & has the right to, fast, safe & reliable online experiences, and we know great websites improve conversions, loyalty & brand.”

Source: RevenueBase Database · checked Sep 22, 2026
13Strong evidenceSuresnes, FranceHQ checked Sep 22, 202611-508 contacts →

Strong evidence

“Editeur de logiciels - Expert des problématiques de performance sur le Web - Tests de montée en charge, Tests de performance - Spécialiste du CloudTesting CloudNetCare permet…”

Source: RevenueBase Database · checked Sep 22, 2026
14Indirect evidenceKolkata, IndiaHQ checked Sep 22, 20261-108 contacts →

Indirect evidence

“RabbitLoader is a WordPress Plugin that helps improve Score.”

Source: RevenueBase Database · checked Sep 22, 2026
15Indirect evidenceEtterbeek, BelgiumHQ checked Sep 22, 202611-507 contacts →

Indirect evidence

“WooRank is an internet startup focused on providing small businesses, online marketers and SEOs a solution to optimize, promote and measure their websites in an automated, instant…”

Source: RevenueBase Database · checked Sep 22, 2026
16Indirect evidenceWiesbaden, GermanyHQ checked Sep 22, 20261-106 contacts →

Indirect evidence

“Wir helfen Unternehmen dabei, ihre Websites schneller und zuverlässiger zu machen.”

Source: RevenueBase Database · checked Sep 22, 2026
17Indirect evidenceCentennial, CO, United StatesHQ checked Sep 22, 20261-105 contacts →

Indirect evidence

“Ecommerce sites have blind spots: site speed, bots, broken code, downtime.”

Source: RevenueBase Database · checked Sep 22, 2026
18Indirect evidenceMumbai, IndiaHQ checked Sep 22, 20261-105 contacts →

Indirect evidence

“Epsilon Delta is a Mumbai based startup focusing on Real user site speed monitoring and improvement.”

Source: RevenueBase Database · checked Sep 22, 2026
19Strong evidenceJaipur, IndiaHQ checked Sep 22, 20261-105 contacts →

Strong evidence

“SpeedVitals is a free Performance Analysis tool for websites aimed at measuring and improving Core Web Vitals.”

Source: RevenueBase Database · checked Sep 22, 2026
20Indirect evidenceUnited StatesHQ checked Sep 22, 202611-505 contacts →

Indirect evidence

“SiteBeacon exists to help you build better websites from the ground up.”

Source: RevenueBase Database · checked Sep 22, 2026
21Partial evidenceGroningen, NetherlandsHQ checked Sep 22, 20261-104 contacts →

Partial evidence

“RUMvision is a tool that provides real-time data on user experiences and Core Web Vitals, helping users identify areas for website optimization.”

Source: RevenueBase Database · checked Sep 22, 2026
22Indirect evidenceMumbai, IndiaHQ checked Sep 22, 20261-104 contacts →

Indirect evidence

“Website speed is an essential aspect of any website.”

Source: RevenueBase Database · checked Sep 22, 2026
23Strong evidenceLondon, United KingdomHQ checked Sep 22, 20261-104 contacts →

Strong evidence

“DebugBear helps businesses monitor and optimize their web performance, with a focus on Google's Core Web Vitals metrics.”

Source: RevenueBase Database · checked Sep 22, 2026
24Indirect evidenceYerevan, ArmeniaHQ checked Sep 22, 20261-103 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 22, 2026
25Indirect evidenceHelsinki, FinlandHQ checked Sep 22, 20261-103 contacts →

Indirect evidence

“We will show you how fast or slow your website is on Black Friday, during a marketing campaign, or when you finally go viral.”

Source: RevenueBase Database · checked Sep 22, 2026

Showing 25 of 197 web performance tools worldwide

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Web performance tools worldwide at a glance

As of Sep 22, 2026
31.3%Verified-email coverage
4.6Average contacts per company
1-10Median size (employees)
4.1%Largest-city concentration · London
Sep 22, 2026Page data refreshed

Companies by employee count

1-10
154
11-50
32
51-200
11

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 web performance tools, 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 web performance tools are linked below.
What qualifies
Companies worldwide whose own description of what they do matches “web performance tools”. 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 web performance tools), 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 web performance tools, 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, 282 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.

Web performance tools by location

1 lists · largest first

Every Web performance tools 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 web performance tools, 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 web performance tools are there worldwide?

RevenueBase identified 197 web performance tools 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?

Speed KIT, headquartered in Hamburg, tops this list with the largest team on record.

Which country has the most web performance tools?

The United States leads with 38 companies. Every web performance tools list by country and city is linked on this page.

Which city has the most web performance tools?

London leads with 8 headquartered companies, followed by New York (6) and Jaipur (4).

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 282 verified decision-maker contacts tracked across these 197 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.