Lookalikes · Data refreshed October 2026

25 Tech Systems Inc. TSI lookalikes

Compiled by the RevenueBase Data Team Data refreshed Oct 18, 2026 4361 matching companies

Looking for Tech Systems Inc. TSI lookalikes, Tech Systems Inc. TSI competitors or Tech Systems Inc. TSI alternatives? The RevenueBase company graph holds 4361 companies that do what Tech Systems Inc. TSI does, matched at 85%+ measured description similarity (RevenueBase, October 2026). The 25 largest are ranked below by team size; across all 4361 matches RevenueBase tracks 209,626 professional contacts, including 20,356 with verified work emails.

Similarity is measured on what companies actually do, from their business descriptions rather than industry codes, and is shown per row as a percentage. This page keeps only companies at 85%+ measured similarity to Tech Systems Inc. TSI and ranks them by company size. Data current as of October 18, 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.

How to read this list Similarity shown on every row Refreshed Oct 18, 2026 Match quality audited by blind human judging

Reference company

Tech Systems Inc. TSI

“Since 1987, Tech Systems, Inc.”

501-1,000Employees

555Contacts tracked

252Verified emails

Explore similar companies → Free signup · no credit card · 500 free credits

The 25 largest Tech Systems Inc. TSI competitors and alternatives

Ranked by team size

Top 25 of 4361 companies matching Tech Systems Inc. TSI at 85%+ description similarity, ranked by team size. Similarity is each company's measured match to Tech Systems Inc. TSI (100% = identical). Data refreshed Oct 18, 2026.
#	Company	HQ	Employees	Similarity	Verified emails
1	G4s	London, GB	10001+	85%	184 contacts →
2	Securitas Group	SE	10001+	86%	304 contacts →
3	Convergint	Hoffman Estates, US	10001+	90%	3,316 contacts →
4	Certis	Singapore, SG	10001+	88%	335 contacts →
5	Graber Sistemas DE Segurança	Barueri, BR	10001+	85%	9 contacts →
6	Sicuritalia S.P.A	Milano, IT	10001+	88%	521 contacts →
7	Wilson Security	Essendon Fields, AU	5,001-10,000	88%	438 contacts →
8	Grupo Atlas DE Seguridad Integral	Cali Cali, CO	10001+	87%	24 contacts →
9	Securiguard Middle East LLC	Abu, AE	10001+	85%	19 contacts →
10	Comando G8	Sao Paulo, BR	5,001-10,000	87%	1 contacts →
11	Protection 1 Security Solutions	Romeoville, US	1,001-5,000	89%	8 contacts →
12	Securitas Belgium	BE	5,001-10,000	86%	353 contacts →
13	Imvula Quality Protection	Woodmead, ZA	10001+	86%	39 contacts →
14	Onet Sécurité	FR	10001+	87%	226 contacts →
15	Securitas Perú	Magdalena Del Mar, PE	1,001-5,000	87%	44 contacts →
16	Strong Segurança, S.A	Amadora, PT	5,001-10,000	88%	110 contacts →
17	PT Sigap Prima Astrea	Dki Jakarta, ID	5,001-10,000	87%	3 contacts →
18	Securitas Norge	Oslo, NO	5,001-10,000	86%	198 contacts →
19	Northeast Security INC	Westwood, US	1,001-5,000	86%	185 contacts →
20	Grupo Evik	Sao Paulo, BR	1,001-5,000	88%	41 contacts →
21	Halogen Group	Lagos, NG	501-1,000	85%	86 contacts →
22	Anjos DA Guarda Segurança	Belo Horizonte, BR	1,001-5,000	86%	8 contacts →
23	Securitas Uruguay	Montevideo, UY	1,001-5,000	86%	100 contacts →
24	Securiton AG	Zollikofen, CH	501-1,000	87%	284 contacts →
25	SNP Security	West Ryde, AU	1,001-5,000	86%	54 contacts →

Showing the 25 largest of 4361 similar companies

Get the full ranked list, tune the similarity cutoff, and unlock verified emails and direct dials at every company on it.

Free signup · no credit card

View the full list →

How similarity works

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.
Matching: Companies are matched on what they actually do, as described in their own business descriptions, never on shared industry codes. The list keeps only matches at 85%+ measured similarity to Tech Systems Inc. TSI, and match quality is audited by blind human judging. Read the full methodology.
Ranking: Team size, largest first, among the matched companies: companies are ordered by the number of professionals RevenueBase tracks at each one. Each row also shows its measured similarity to Tech Systems Inc. TSI as a percentage.
Verification: Contact records re-verify on a rolling cadence rather than being scraped once and left to decay; each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on October 18, 2026. Lists refresh periodically as the graph is re-checked.

Frequently asked

What are Tech Systems Inc. TSI lookalikes?

Tech Systems Inc. TSI lookalikes are companies that closely resemble what Tech Systems Inc. TSI does and sells, based on each company's own business description. The table above ranks the closest matches by company size, with each company's similarity to Tech Systems Inc. TSI shown as a percentage.

What companies are similar to Tech Systems Inc. TSI?

The largest companies similar to Tech Systems Inc. TSI are G4s, Securitas Group, Convergint and Certis. The table above shows the 25 largest of the 4361 matched companies, with each row's similarity shown as a percentage.

How is similarity measured?

Similarity scores how closely a company's business, as described in its own words, matches Tech Systems Inc. TSI's, shown as a percentage (100% = an identical description). The list keeps companies at 85% or above and ranks them by team size.

How do I get contacts at these companies?

A free RevenueBase account lets you run this exact search and work the top matches, verified emails and direct dials included. Upgrading unlocks the 20,356 verified emails and direct dials tracked across all 4361 matched companies.

Who are Tech Systems Inc. TSI's biggest competitors?

The largest Tech Systems Inc. TSI competitors by measured business-description similarity are G4s, Securitas Group, Convergint and Certis. Every company here does what Tech Systems Inc. TSI does at 85%+ similarity, ranked by team size.

What are the best Tech Systems Inc. TSI alternatives?

The closest Tech Systems Inc. TSI alternatives are the companies whose own business descriptions match Tech Systems Inc. TSI's most closely, shown above with each one's similarity as a percentage and ranked by team size.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 18, 2026.

Prospecting this space? Verified emails and direct dials at all 4361 companies similar to Tech Systems Inc. TSI. Start with a free account, no credit card.

Download this list →

Related lists

More lookalike lists

Browse the directory

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.