Company lists · Data refreshed September 2026
Top 8 Investigation firms based in Seattle, United States
RevenueBase identified 29 company matches for investigation firms associated with Seattle, United States as of September 2026 and tracks 213 professional contacts across them, including 94 with verified work emails. Across the United States, New York is the largest hub for this category (145 companies); Seattle has 29.
This list covers company matches for investigation firms associated with Seattle, United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 20, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 8 largest investigation firms based in Seattle, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 108 contacts → | ||||
Exact match “YA Engineering Services is now part of YA Group.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 2 | 21 contacts → | ||||
Exact match “Copperhead Consulting is a team of highly capable Agents, Investigators, Special Operations Veterans and technical professionals.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 3 | 11 contacts → | ||||
Exact match “Tangibly finds trade secret theft and funds litigation.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 4 | 3 contacts → | ||||
Exact match “Clarity Investigations & Consulting PLLC maintains a unique niche among workplace law firms.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 5 | 2 contacts → | ||||
Exact match “At Crystal Investigations, we specialize in conducting independent, impartial, and thorough investigations for workplaces and educational institutions across the Pacific Northwest.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 6 | 1 contacts → | ||||
Exact match “Summit Investigations is the Pacific Northwest’s leading private investigation firm.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 7 | 1 contacts → | ||||
Exact match “Speigel Investigations is a female-owned private investigation agency based in Seattle, WA headed by Principal Investigator, Liz Speigel.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
| 8 | 1 contacts → | ||||
Exact match “Solis Financial Forensics LLC was founded by David Solis and operates in the greater Seattle area and southern California area.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase | |||||
RevenueBase SmartSearch
Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.
This list uses Exact for “investigation firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.
Showing 8 of 29 investigation firms based in Seattle, United States
See the full list, filter by size, metro and specialty, and access 94 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Investigation firms based in Seattle, United States at a glance
As of Sep 20, 2026Companies by employee count
Email recency for this list is measured across the whole United States list rather than for Seattle, so it is reported there. Company counts and contact totals on this page are exact for Seattle, over 29 companies.
How this list was built
The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
- What qualifies
- Company records associated with Seattle, United States whose business descriptions match “investigation firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
- RevenueBase SmartSearch
- Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
- Public preview
- The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
- Match quality
- RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
- 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 displayed company carries at least one verified work email. RevenueBase tracks 94 professional contacts with verified work emails across the full matched dataset. 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.
- Record context
- Company records and descriptions can change. Check the company's website for its current services and locations.
Investigation firms by metro in the United States
- Investigation firms in New York145
- Investigation firms in Houston74
- Investigation firms in Chicago65
- Investigation firms in Los Angeles61
- Investigation firms in Miami60
- Investigation firms in Washington48
- Investigation firms in Dallas46
- Investigation firms in Atlanta45
- Investigation firms in Phoenix37
- Investigation firms in Denver34
- Investigation firms in Fort Lauderdale31
- Investigation firms in Tampa31
- Investigation firms in Boston29
- Investigation firms in San Diego29
- Investigation firms in Orlando28
- Investigation firms in Las Vegas27
Frequently asked
What is RevenueBase SmartSearch?
RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “investigation firms”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many investigation firms are there based in Seattle, United States?
RevenueBase identified 29 company matches for investigation firms associated with Seattle, United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.
What is the largest company on this list?
YA Engineering Services tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city in the United States has the most investigation firms?
New York leads the United States with 145 company records, followed by Houston (74) and Chicago (65). Seattle has 29.
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 94 professional contacts with verified work emails tracked across these 29 companies; direct dials are available where recorded.
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.
Ready to reach these companies? Verified emails and direct dials for all 29 investigation firms based in Seattle, United States. Start with a free account, no credit card.
Download this list →Related lists
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- Investigation firms based in Denver, United States
- Investigation firms based in Fort Lauderdale, United States
- Investigation firms based in Houston, United States
- Investigation firms based in Las Vegas, United States
- Investigation firms based in Los Angeles, United States
- Investigation firms based in Miami, United States
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 SmartSearch, 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.
More company lists
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- Lists by location
- Lists A-Z
- New lists
- Investigation firms based in Mumbai, India
- Investigation firms based in New Delhi, India
- Investigation firms based in Atlanta, United States
- Investigation firms based in Boston, United States
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Company intelligence · public preview
Top 8 investigation firms based in Seattle, United States
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 29 matching company records for investigation firms based in Seattle, United States, with 213 tracked contacts and 94 verified work emails.
This public preview shows 8 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 20, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 8 investigation firms based in Seattle, United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 |  YA Engineering Servicesyagroup.comHQ: Seattle, WA, United StatesReported employees: 51-200 | Seattle, WA, United States | 51-200 | Exact match | 108 contacts → |
“YA Engineering Services is now part of YA Group.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Copperhead Consulting INCcopperheadci.comHQ: Seattle, WA, United StatesReported employees: 11-50 | Seattle, WA, United States | 11-50 | Exact match | 21 contacts → |
“Copperhead Consulting is a team of highly capable Agents, Investigators, Special Operations Veterans and technical professionals.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Tangiblytangibly.comHQ: Seattle, WA, United StatesReported employees: 1-10 | Seattle, WA, United States | 1-10 | Exact match | 11 contacts → |
“Tangibly finds trade secret theft and funds litigation.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Clarity Investigations & Consulting Pllcclarity-investigations.comHQ: Seattle, WA, United StatesReported employees: 1-10 | Seattle, WA, United States | 1-10 | Exact match | 3 contacts → |
“Clarity Investigations & Consulting PLLC maintains a unique niche among workplace law firms.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Crystal Investigationscrystalinvestigations.com HQ: Seattle, United StatesReported employees: 1-10 | Seattle, United States | 1-10 | Exact match | 2 contacts → |
“At Crystal Investigations, we specialize in conducting independent, impartial, and thorough investigations for workplaces and educational institutions across the Pacific Northwest.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Summit Investigations, LLCsummitinvestigations.net HQ: Seattle, WA, United StatesReported employees: 1-10 | Seattle, WA, United States | 1-10 | Exact match | 1 contacts → |
“Summit Investigations is the Pacific Northwest’s leading private investigation firm.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Speigel Investigationsspeigelinvestigations.com HQ: Seattle, WA, United StatesReported employees: 1-10 | Seattle, WA, United States | 1-10 | Exact match | 1 contacts → |
“Speigel Investigations is a female-owned private investigation agency based in Seattle, WA headed by Principal Investigator, Liz Speigel.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Solis Financial Forensics LLCsolisff.com HQ: Seattle, WA, United StatesReported employees: 1-10 | Seattle, WA, United States | 1-10 | Exact match | 1 contacts → |
“Solis Financial Forensics LLC was founded by David Solis and operates in the greater Seattle area and southern California area.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 8 of 29 company matches
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Investigation firms: dataset insights
September 20, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
29 records in the displayed employee bands.
0 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured across the whole United States list rather than for Seattle, so it is reported there. Company counts and contact totals on this page are exact for Seattle, over 29 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 20, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Investigation firms by metro in the United States
- Investigation firms in New York145
- Investigation firms in Houston74
- Investigation firms in Chicago65
- Investigation firms in Los Angeles61
- Investigation firms in Miami60
- Investigation firms in Washington48
- Investigation firms in Dallas46
- Investigation firms in Atlanta45
- Investigation firms in Phoenix37
- Investigation firms in Denver34
- Investigation firms in Fort Lauderdale31
- Investigation firms in Tampa31
- Investigation firms in Boston29
- Investigation firms in San Diego29
- Investigation firms in Orlando28
- Investigation firms in Las Vegas27
Questions about this company list
What does Exact match mean for investigation firms?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many investigation firms did RevenueBase find based in Seattle, United States?
The saved snapshot records 29 matching company records, 213 tracked contacts and 94 verified emails. The public preview displays 8 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 20, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Investigation firms by geography
- Investigation firms based in Mumbai, India
- Investigation firms based in New Delhi, India
- Investigation firms based in Atlanta, United States
- Investigation firms based in Boston, United States
- Investigation firms based in Chicago, United States
- Investigation firms based in Dallas, United States
- Investigation firms based in Denver, United States
- Investigation firms based in Fort Lauderdale, United States
- Investigation firms based in Houston, United States
- Investigation firms based in Las Vegas, United States
- Investigation firms based in Los Angeles, United States
- Investigation firms based in Miami, United States
Cite this list
RevenueBase Data Team. Top 8 investigation firms based in Seattle, United States. Snapshot: September 20, 2026. https://revenuebase.ai/companies/investigation-firms/united-states/seattle.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Investigation firms based in Mumbai, India
- Investigation firms based in New Delhi, India
- Investigation firms based in Atlanta, United States
- Investigation firms based in Boston, United States
- Investigation firms based in Chicago, United States
- Investigation firms based in Dallas, United States
Company intelligence · public preview
Top 8 investigation firms based in Seattle, United States
RevenueBase records 29 matching company records for investigation firms based in Seattle, United States, with 213 tracked contacts and 94 verified work emails.
This public preview shows 8 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 20, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 8 investigation firms based in Seattle, United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | YA Engineering Servicesyagroup.com HQ: Seattle, WA, United StatesReported employees: 51-200 | Seattle, WA, United States | 51-200 | Exact match | 108 contacts → |
“YA Engineering Services is now part of YA Group.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Copperhead Consulting INCcopperheadci.com HQ: Seattle, WA, United StatesReported employees: 11-50 | Seattle, WA, United States | 11-50 | Exact match | 21 contacts → |
“Copperhead Consulting is a team of highly capable Agents, Investigators, Special Operations Veterans and technical professionals.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Tangiblytangibly.com HQ: Seattle, WA, United StatesReported employees: 1-10 | Seattle, WA, United States | 1-10 | Exact match | 11 contacts → |
“Tangibly finds trade secret theft and funds litigation.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Clarity Investigations & Consulting Pllcclarity-investigations.com HQ: Seattle, WA, United StatesReported employees: 1-10 | Seattle, WA, United States | 1-10 | Exact match | 3 contacts → |
“Clarity Investigations & Consulting PLLC maintains a unique niche among workplace law firms.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Crystal Investigationscrystalinvestigations.com HQ: Seattle, United StatesReported employees: 1-10 | Seattle, United States | 1-10 | Exact match | 2 contacts → |
“At Crystal Investigations, we specialize in conducting independent, impartial, and thorough investigations for workplaces and educational institutions across the Pacific Northwest.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Summit Investigations, LLCsummitinvestigations.net HQ: Seattle, WA, United StatesReported employees: 1-10 | Seattle, WA, United States | 1-10 | Exact match | 1 contacts → |
“Summit Investigations is the Pacific Northwest’s leading private investigation firm.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Speigel Investigationsspeigelinvestigations.com HQ: Seattle, WA, United StatesReported employees: 1-10 | Seattle, WA, United States | 1-10 | Exact match | 1 contacts → |
“Speigel Investigations is a female-owned private investigation agency based in Seattle, WA headed by Principal Investigator, Liz Speigel.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Solis Financial Forensics LLCsolisff.com HQ: Seattle, WA, United StatesReported employees: 1-10 | Seattle, WA, United States | 1-10 | Exact match | 1 contacts → |
“Solis Financial Forensics LLC was founded by David Solis and operates in the greater Seattle area and southern California area.” Recorded description excerpt · September 20, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 8 of 29 company matches
Build a targeted audience, find relevant contacts and export available records to your workflow.
Free signup · 500 credits · limited free results
Investigation firms: dataset insights
September 20, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
29 records in the displayed employee bands.
0 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured across the whole United States list rather than for Seattle, so it is reported there. Company counts and contact totals on this page are exact for Seattle, over 29 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 20, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Investigation firms by metro in the United States
- Investigation firms in New York145
- Investigation firms in Houston74
- Investigation firms in Chicago65
- Investigation firms in Los Angeles61
- Investigation firms in Miami60
- Investigation firms in Washington48
- Investigation firms in Dallas46
- Investigation firms in Atlanta45
- Investigation firms in Phoenix37
- Investigation firms in Denver34
- Investigation firms in Fort Lauderdale31
- Investigation firms in Tampa31
- Investigation firms in Boston29
- Investigation firms in San Diego29
- Investigation firms in Orlando28
- Investigation firms in Las Vegas27
Questions about this company list
What does Exact match mean for investigation firms?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many investigation firms did RevenueBase find based in Seattle, United States?
The saved snapshot records 29 matching company records, 213 tracked contacts and 94 verified emails. The public preview displays 8 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 20, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Investigation firms by geography
- Investigation firms based in Mumbai, India
- Investigation firms based in New Delhi, India
- Investigation firms based in Atlanta, United States
- Investigation firms based in Boston, United States
- Investigation firms based in Chicago, United States
- Investigation firms based in Dallas, United States
- Investigation firms based in Denver, United States
- Investigation firms based in Fort Lauderdale, United States
- Investigation firms based in Houston, United States
- Investigation firms based in Las Vegas, United States
- Investigation firms based in Los Angeles, United States
- Investigation firms based in Miami, United States
Cite this list
RevenueBase Data Team. Top 8 investigation firms based in Seattle, United States. Snapshot: September 20, 2026. https://revenuebase.ai/companies/investigation-firms/united-states/seattle.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Investigation firms based in Mumbai, India
- Investigation firms based in New Delhi, India
- Investigation firms based in Atlanta, United States
- Investigation firms based in Boston, United States
- Investigation firms based in Chicago, United States
- Investigation firms based in Dallas, United States