Prospect list · NAICS 54 · CA

Professional, Scientific, and Technical Services companies in California

A live list from the US register in the multi-country index on Biznopedia — companies on record, never an estimate. Preview free below; contact values are only revealed through the credit-gated export.

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US professional, scientific, and technical services companies in California: 9 on record, 8 with email on file.

NAICS sector 54 · California (CA) · Updated 2 August 2026. Contact figures are companies contactable on record — presence flags in the index, never contact values.

Below thresholdThis list is below the 100-company publication threshold, so it stays reachable but is not published to search engines.
On record9Professional, Scientific, and Technical Services companies in the California register
Email on record888.9% contactable on record by email
Phone on record00.0% contactable on record by phone
Website on record9100.0% with a web domain on record

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Top 9 of 9 companies

The largest professional, scientific, and technical services companies in California by reported headcount (then name). Contact columns show what is on record — the values themselves are only revealed through the credit-gated export.

Preview of Professional, Scientific, and Technical Services companies in California with contact-presence flags
CompanyCityEmployeesIndustryContactable on record
Mozilla Foundation Mountain View 250 to 499 Custom Computer Programming Services Email on record No phone on record Website on record
Proofpoint, Inc. Sunnyvale 20 to 49 Software Publishers Email on record No phone on record Website on record
Goodreads LLC San Francisco Unknown Unclassified Establishments Email on record No phone on record Website on record
Github, Inc. San Francisco Unknown Other Management Consulting Services Email on record No phone on record Website on record
Imgur LLC San Francisco 10 to 19 Computer Systems Design Services Email on record No phone on record Website on record
Creative Commons San Francisco 10 to 19 All Other Legal Services No email on record No phone on record Website on record
Wikihow, Inc. Palo Alto Unknown Unclassified Establishments Email on record No phone on record Website on record
Stripe, Inc. San Francisco 1 to 4 All Other Business Support Services Email on record No phone on record Website on record
Wal-Mart Associates, Inc. Sunnyvale 1 Administrative Management and General Management Consulting Services Email on record No phone on record Website on record
Preview honestyMasked presence flags only — no email address, phone number or domain is shown on this pageSorted by reported headcount, then name

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Methodology & provenance

How this list is measured

This list counts registered US companies in California whose NAICS classification falls under sector 54 (Professional, Scientific, and Technical Services) — a live prefix-and-state aggregation over the multi-country company index, refreshed on a rolling cache. It counts registered legal entities on record, not establishments or employees; nothing is estimated or extrapolated. Email, phone and website figures are presence counts (contactable on record), never contact values — values exist only behind the credit-gated reveal.