Company lists · Data refreshed September 2026

Top 19 Rock and soil testing companies based in South Africa

RevenueBase identified 86 company matches for rock and soil testing companies associated with South Africa as of September 2026 and tracks 775 professional contacts across them, including 166 with verified work emails. Johannesburg is the largest hub.

This list covers company matches for rock and soil testing companies associated with South Africa, 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 21, 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.

How to read this list RevenueBase SmartSearch · Exact Recorded Sep 21, 2026 How this list was built
86Companies
775Contacts tracked
166Verified emails
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The 19 largest rock and soil testing companies based in South Africa

Ranked by team size
Top 19 of 86 company matches for rock and soil testing companies based in South Africa, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 21, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchPretoria, South AfricaHQ recorded Sep 21, 2026201-50077 contacts →

Exact match

“The Soillab staff compliment includes Engineers, Technologists and Technicians, as well as skilled and semi-skilled operators.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
2Exact matchSunrella, South AfricaHQ recorded Sep 21, 2026201-50068 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
3Exact matchDurban, South AfricaHQ recorded Sep 21, 202651-20057 contacts →

Exact match

“Since the company's inception in 1992, Geosure has established a formidable reputation in Southern African Geotechnics.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
4Exact matchPotchefstroom, South AfricaHQ recorded Sep 21, 202611-5047 contacts →

Exact match

“Open House Management Solutions is a South-African based, Geotechnical Engineering and Seismological services provider.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
5Exact matchOttery, South AfricaHQ recorded Sep 21, 202651-20037 contacts →

Exact match

“Franki is the oldest and most established specialist geotechnical contractor in Sub-Saharan Africa.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
6Exact matchPort Elizabeth, South AfricaHQ recorded Sep 21, 2026201-50032 contacts →

Exact match

“Labco provides laboratory testing services in the environmental and civil engineering industries.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
7Exact matchDurban, South AfricaHQ recorded Sep 21, 202651-20022 contacts →

Exact match

“Soilco offers a wide range of soil and materials testing services through its KwaZulu-Natal locations in Westmead (Pinetown), Pietermaritzburg and Vryheid and provides civil…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
8Exact matchJohannesburg, South AfricaHQ recorded Sep 21, 202611-5022 contacts →

Exact match

“Rafuni offers Geotechnical, Geological and Environmental Consulting Services.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
9Exact matchJohannesburg, South AfricaHQ recorded Sep 21, 202651-20013 contacts →

Exact match

“Civilab is one of the most technically advanced civil and mining engineering laboratories in South Africa.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
10Exact matchCape Town, South AfricaHQ recorded Sep 21, 202651-20010 contacts →

Exact match

“Fairbrother Geotechnical Engineering is a leading South African geotechnical contractor delivering specialised ground engineering solutions to infrastructure, energy, commercial…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
11Exact matchSandton, South AfricaHQ recorded Sep 21, 202611-5010 contacts →

Exact match

“Groundwork Consulting is a leading geotechnical consulting firm, harnessing cutting-edge technologies to provide innovative solutions for challenges in both the mining and civil…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
12Exact matchClayville East, South AfricaHQ recorded Sep 21, 202611-5010 contacts →

Exact match

“SoilTecnix is a privately owned Civil engineering Materials testing laboratory situated in Gauteng along the R21 in Clayville We pride our self in being a leading civil…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
13Exact matchDurban, South AfricaHQ recorded Sep 21, 202651-20010 contacts →

Exact match

“Mega Pile specialises in geotechnical investigations, piling and lateral support.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
14Exact matchCity Of Tshwane, South AfricaHQ recorded Sep 21, 202651-2009 contacts →

Exact match

“We specialise in the testing of construction materials for quality assurance and quality control purposes to our Clients.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
15Exact matchNelspruit, South AfricaHQ recorded Sep 21, 202651-2008 contacts →

Exact match

“Global Laboratories and Risk Solutions is based in South Africa and services the entire African continent.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
16Exact matchDurban, South AfricaHQ recorded Sep 21, 20261-106 contacts →

Exact match

“We provide a reliable and efficient Geo-tech, Geo-hydrology, Survey, Civil Engineering and Project Management services to the engineering and sciences sectors for both private and…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
17Exact matchRandburg, South AfricaHQ recorded Sep 21, 202611-504 contacts →

Exact match

“Welcome to JCG – Your Trusted Geotechnical Solutions Partner Founded in 2005 as a passionate father-and-son venture, JCG has grown into a leading name in geotechnical solutions -…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
18Exact matchCape Town, South AfricaHQ recorded Sep 21, 20261-104 contacts →

Exact match

“Melis & Du Plessis Consulting Engineers have been in existence for 40 years, providing specialist consultancy services in the fields of Geotechnical Engineering and Engineering…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
19Exact matchDurban, South AfricaHQ recorded Sep 21, 20261-102 contacts →

Exact match

“Apex is dedicated to high quality customer focused geotechnical engineering investigation, design and construction.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase

Showing 19 of 86 rock and soil testing companies based in South Africa

See the full list, filter by size, metro and specialty, and access 166 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Rock and soil testing companies based in South Africa at a glance

As of Sep 21, 2026
21.4%Verified-email coverage
9.0Average contacts per company
1-10Median size (employees)
17.4%Largest-city concentration · Johannesburg
Sep 21, 2026Page data refreshed

Companies by employee count

1-10
43
11-50
22
51-200
13
201-500
8

Email recency for this list is measured worldwide rather than for South Africa, so it is reported there. Company counts and contact totals on this page are exact for South Africa, over 86 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 South Africa whose business descriptions match “rock and soil testing companies” 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 166 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 21, 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.

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 “rock and soil testing companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many rock and soil testing companies are there based in South Africa?

RevenueBase identified 86 company matches for rock and soil testing companies associated with South Africa 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?

Soillab tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most rock and soil testing companies?

Johannesburg leads with 15 company records, followed by Cape Town (4) and Centurion (3).

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 166 professional contacts with verified work emails tracked across these 86 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 21, 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 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.