# Enterprise search & knowledge tools used by Professional Services companies

usedby lists 16 Professional Services companies using 4 Enterprise search & knowledge tools. The most used is Glean: 6 of the 16 Professional Services companies on usedby, every proof level counted. These are counts of the companies usedby tracks, not a market share. Data as of 2026-10-24.

## Largest and best-proven users

Two labelled views of the same companies. Neither is a score.

### Largest companies

By employee range. Size known for 13 of 16.

| Company | Proof | Employees | Tools | Last check |
|---|---|---|---|---|
| [Docusign](https://www.usedby.ai/companies/docusign.md) | Confirmed | 5,001–10,000 | Loopio | 2026-10-19 |
| [Alight](https://www.usedby.ai/companies/alight.md) | Observed | 5,001–10,000 | Loopio | 2026-10-19 |
| [Harvey](https://www.usedby.ai/companies/harvey.md) | Confirmed | 1,001–5,000 | Glean | 2026-10-24 |

### Strongest proof

Confirmed or declared: 9 of 16. This view filters what you read, never what is counted.

| Company | Proof | Employees | Tools | Last check |
|---|---|---|---|---|
| [Harvey](https://www.usedby.ai/companies/harvey.md) | Confirmed | 1,001–5,000 | Glean | 2026-10-24 |
| [Icertis](https://www.usedby.ai/companies/icertis.md) | Confirmed | 1,001–5,000 | Glean | 2026-10-24 |
| [LegalZoom](https://www.usedby.ai/companies/legalzoom.md) | Confirmed | 1,001–5,000 | Glean | 2026-10-24 |

## Ranking

Tools ranked by the companies of the 16 Professional Services companies on usedby that use them. Each company counts once per tool, at its strongest proof. Ties go to more confirmed, then declared, then observed companies.

| # | Tool | Companies | Confirmed | Declared | Observed | Job posts only | Last check |
|---|---|---|---|---|---|---|---|
| 1 | [Glean](https://www.usedby.ai/tools/glean.md) | 6 | 3 | 0 | 2 | 1 | 2026-10-24 |
| 2 | [Loopio](https://www.usedby.ai/tools/loopio.md) | 5 | 4 | 0 | 1 | 0 | 2026-10-19 |
| 3 | [Guru](https://www.usedby.ai/tools/guru.md) | 3 | 2 | 0 | 1 | 0 | 2026-10-20 |
| 4 | [Sana](https://www.usedby.ai/tools/sana.md) | 2 | 0 | 0 | 2 | 0 | 2026-10-24 |

## Customers per tool

Every line is a customer, at one of three proof levels: confirmed (a case study, a named quote, a press release, or the company's own public account of using the tool (its own site, or a post by one of its executives, VP or above)), observed (the vendor shows the company on its own pages) or signal (a job post shows the company's employees use the tool, the weakest proof). A line the company declared to usedby itself, or that it lists as a sub-processor on its own legal page, is marked declared. A signal is never a case study or a vendor listing. Strongest proof first. "Last check" is the later of the line's re-verification and its latest capture.

| Tool | Company | Proof | Source | Last check |
|---|---|---|---|---|
| Glean | [Icertis](https://www.usedby.ai/companies/icertis.md) | Confirmed | [glean.com](https://www.glean.com/resources/customer-stories/icertis), captured 2026-10-17 | 2026-10-24 |
| Glean | [LegalZoom](https://www.usedby.ai/companies/legalzoom.md) | Confirmed | [glean.com](https://www.glean.com/resources/customer-stories/legalzoom), captured 2026-10-07 | 2026-10-24 |
| Glean | [Harvey](https://www.usedby.ai/companies/harvey.md) | Confirmed | [glean.com](https://www.glean.com/resources/customer-stories/harvey), captured 2026-10-07 | 2026-10-24 |
| Glean | [BetterUp](https://www.usedby.ai/companies/betterup.md) | Observed | [glean.com](https://www.glean.com/resources/customer-stories), captured 2026-10-24 | 2026-10-24 |
| Glean | [Greenhouse](https://www.usedby.ai/companies/greenhouse.md) | Observed | [glean.com](https://www.glean.com/customers) | Not dated |
| Glean | [OneTrust](https://www.usedby.ai/companies/onetrust.md) | Signal (job post) | [job-boards.greenhouse.io](https://job-boards.greenhouse.io/onetrust/jobs/8256207), captured 2026-10-21 | 2026-10-21 |
| Loopio | [Docusign](https://www.usedby.ai/companies/docusign.md) | Confirmed | [loopio.com](https://loopio.com/case-study/zendesk-automates-and-scales-rfp-delivery/), captured 2026-10-19 | 2026-10-19 |
| Loopio | [Businessolver](https://www.usedby.ai/companies/businessolver.md) | Confirmed | [loopio.com](https://loopio.com/case-study/businessolver/), captured 2026-10-08 | 2026-10-19 |
| Loopio | [Cherry Bekaert](https://www.usedby.ai/companies/cherry-bekaert.md) | Confirmed | [loopio.com](https://loopio.com/case-study/cherry-bekaert/), captured 2026-10-19 | 2026-10-19 |
| Loopio | [WellRight](https://www.usedby.ai/companies/wellright.md) | Confirmed | [loopio.com](https://loopio.com/case-study/how-wellright-responds-to-million-dollar-deals-with-loopio/), captured 2026-10-08 | 2026-10-19 |
| Loopio | [Alight](https://www.usedby.ai/companies/alight.md) | Observed | [loopio.com](https://loopio.com/customers/), captured 2026-10-19 | 2026-10-19 |
| Guru | [HireVue](https://www.usedby.ai/companies/hirevue.md) | Confirmed | [getguru.com](https://www.getguru.com/fr/customers/hirevue-cuts-onboarding-time), captured 2026-10-05 | 2026-10-20 |
| Guru | [Steno](https://www.usedby.ai/companies/steno.md) | Confirmed | [getguru.com](https://www.getguru.com/fr/customers/steno), captured 2026-10-03 | 2026-10-20 |
| Guru | [Trusted](https://www.usedby.ai/companies/trusted.md) | Observed | [getguru.com](https://www.getguru.com/fr/pricing), captured 2026-10-20 | 2026-10-20 |
| Sana | [Kearney](https://www.usedby.ai/companies/kearney.md) | Observed | [sanalabs.com](https://sanalabs.com/), captured 2026-10-24 | 2026-10-24 |
| Sana | [Swile](https://www.usedby.ai/companies/swile.md) | Observed | [sanalabs.com](https://sanalabs.com/), captured 2026-10-24 | 2026-10-24 |

## Method

Public customer lines of active Enterprise search & knowledge tools at companies classified in Professional Services. No software vendor had to be left out. Company mix by strongest proof: 9 confirmed, 0 declared, 6 observed and 1 signal.

## Questions

### Which Enterprise search & knowledge tools do Professional Services companies use most?

Glean leads: 6 of the 16 Professional Services companies on usedby that use Enterprise search & knowledge tools use it. Next: Loopio (5), Guru (3), and Sana (2).

### How many Professional Services companies use Enterprise search & knowledge tools?

16 Professional Services companies on usedby use at least one of 4 Enterprise search & knowledge tools. It counts the companies usedby tracks.

### What proof backs these lines?

Of the 16 companies, each counted at its strongest proof: 9 confirmed, 0 declared, 6 observed and 1 known from a job post.

### How does usedby build this ranking?

usedby counts each Professional Services company once per tool, from public proof: case studies, press releases, the company's own site or its declaration to usedby, vendor customer pages and job posts. Every line shows its proof and the date usedby last checked it.

Industry page: https://www.usedby.ai/companies/industry/professional-services.md · Category page: https://www.usedby.ai/tools/category/knowledge-internal-search.md

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Source: https://www.usedby.ai/companies/industry/professional-services/knowledge-internal-search · How we check: https://www.usedby.ai/methodology