Company lists · Data refreshed September 2026
Top 25 Precision timing equipment based in the United States
RevenueBase identified 50 precision timing equipment headquartered in the United States as of September 2026 and tracks 2,055 professional contacts across them, including 583 with verified work emails. San Jose is the largest hub.
This list covers precision timing equipment headquartered in the United States, 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 20, 2026.
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 precision timing equipment based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 443 contacts → | ||||
Partial evidence “SiTime Corporation (Nasdaq: SITM), the market leader in silicon MEMS timing, is an analog and semiconductor company that is revolutionizing the timing market.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 2 | 283 contacts → | ||||
Partial evidence “For over 50 years, ESE has been meeting the Precision Time and Signal Distribution needs of the Broadcast, Communication and Military worlds.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 3 | 177 contacts → | ||||
Indirect evidence “Symmetricom was acquired by Microsemi Corporation in November 2013.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 4 | 118 contacts → | ||||
Strong evidence “Frequency Electronics, Inc.(FEI) is a world leader in the design, development, and manufacture of high-precision timing, frequency control and synchronization products for…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 5 | 93 contacts → | ||||
Indirect evidence “JAVAD GNSS, headquartered in San Jose, CA designs, engineers, and manufactures products using multi-constellation, multi-frequency GNSS technology solutions for positioning…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 6 | 90 contacts → | ||||
Partial evidence “In 1970, Statek Corporation pioneered the miniaturization of quartz timing elements to revolutionize the frequency control industry.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 7 | 88 contacts → | ||||
Indirect evidence “Primex is a global market leader of synchronized time, advanced monitoring and facility compliance technologies that improve operational efficiency and reduce risk for Healthcare…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 8 | 84 contacts → | ||||
Indirect evidence “Quietly the Best Since 1978" Since 1978,Wenzel Associates has set the standard for ultra-low phase noise crystal oscillators, a portfolio complemented by a range of advanced…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 9 | 64 contacts → | ||||
Indirect evidence “Fraen Corporation was established in 1942 as a manufacturer of time-keeping components.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 10 | 39 contacts → | ||||
Partial evidence “Brandywine Communications is the premier supplier of GPS and time code based precision time and frequency products.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 11 | 37 contacts → | ||||
Indirect evidence “Founded in Miami, Fl.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 12 | 36 contacts → | ||||
Indirect evidence “ECS Inc, International was established in 1980 and has grown to become one of the most recognized and dependable manufacturers of frequency control and power management products…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 13 | 31 contacts → | ||||
Partial evidence “We are trusted advisors for operators seeking best-in-class, high-accuracy network timing solutions.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 14 | 26 contacts → | ||||
Partial evidence “GPS Source, a wholly owned subsidiary of General Dynamics Mission Systems, provides precise timing distribution, GPS, and GNSS solutions for both commercial and military markets.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 15 | 23 contacts → | ||||
Indirect evidence “EM Research designs frequency generation and signal conversion solutions that give our clients a competitive advantage.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 16 | 22 contacts → | ||||
Indirect evidence “Masterclock designs and manufactures a variety of precise timekeeping products to keep both facilities and people synchronized.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 17 | 20 contacts → | ||||
Partial evidence “Stanford Research Systems (SRS) has a 40-year history of designing and manufacturing test equipment for research.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 18 | 17 contacts → | ||||
Indirect evidence “For more than 90 years, Bliley Technologies has been crafting some of the highest performing frequency control devices in the universe including OCXO, TCXO, VCXO, clocks, and…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 19 | 12 contacts → | ||||
Indirect evidence “Protempis offers solutions providing precise time and synchronization, for telecommunications, communication systems, data centers, financial networks, utilities, factory…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 20 | 11 contacts → | ||||
Strong evidence “NOVUS is a United States Original Brand Manufacturer of precision timing products, including Rubidium and GNSS locked frequency references, PTP/NTP time servers, distribution…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 21 | 8 contacts → | ||||
Indirect evidence “Precise Time and Frequency, LLC is part of the LGL Group, along with sister company MtronPTI.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 22 | 8 contacts → | ||||
Indirect evidence “Frequency Management International is a U.S-based global leader in the design, manufacturing and marketing of Hi-Rel and extreme environment frequency control and hybrid…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 23 | 8 contacts → | ||||
Indirect evidence “Founded in 1958, Crystek Corporation is a high performance technological world leader in the RF microwave and frequency control industry.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 24 | 4 contacts → | ||||
Partial evidence “GFS is an engineering company specialized in design and development of high precision electronic and optical instrumentation.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 25 | 4 contacts → | ||||
Indirect evidence “Qulsar activates new applications and capabilities made possible by precisely synchronized time.” Source: RevenueBase Database · checked Sep 20, 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: precision timing equipment. 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 precision timing equipment.
- Partial evidence
- Its own public description names part of precision timing equipment, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name precision timing equipment. 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 50 precision timing equipment based in the United States
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Precision timing equipment based in the United States at a glance
As of Sep 20, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 50 companies.
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 precision timing equipment, 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.
- What qualifies
- Companies headquartered in the United States whose own description of what they do matches “precision timing equipment”. 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 precision timing equipment), 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 precision timing equipment, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
- 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, 583 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 20, 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.
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 precision timing equipment, 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 precision timing equipment are there based in the United States?
RevenueBase identified 50 precision timing equipment headquartered in the United States 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?
Sitime, headquartered in Santa Clara, tops this list with the largest team on record.
Which city has the most precision timing equipment?
San Jose leads with 4 headquartered companies, followed by Aliso Viejo (2) and Irvine (2).
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 583 verified decision-maker contacts tracked across these 50 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 20, 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.
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