Lookalikes · Data refreshed September 2026

25 SISA lookalikes

Compiled by the RevenueBase Data Team Data refreshed Sep 26, 2026 2674 matching companies

Looking for SISA lookalikes, SISA competitors or SISA alternatives? The RevenueBase company graph holds 2674 companies that do what SISA does, matched at 85%+ measured description similarity (RevenueBase, September 2026). The 25 largest are ranked below by team size; across all 2674 matches RevenueBase tracks 80,571 professional contacts, including 36,310 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 SISA and ranks them by company size. Data current as of September 26, 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 Sep 26, 2026 Match quality audited by blind human judging

Reference company

SISA

“SISA is a global forensics-driven cybersecurity solutions company, trusted by leading organizations for securing their businesses with robust preventive, detective, and corrective…”

201-500Employees

743Contacts tracked

257Verified emails

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The 25 largest SISA competitors and alternatives

Ranked by team size

Top 25 of 2674 companies matching SISA at 85%+ description similarity, ranked by team size. Similarity is each company's measured match to SISA (100% = identical). Data refreshed Sep 26, 2026.
#	Company	HQ	Employees	Similarity	Verified emails
1	Palo Alto Networks	Santa Clara, US	10001+	86%	11,152 contacts →
2	Fortinet	Sunnyvale, US	10001+	86%	8,770 contacts →
3	Trellix	Plano, US	1,001-5,000	85%	1,572 contacts →
4	OPTIV	Leawood, US	1,001-5,000	86%	1,440 contacts →
5	Guidepoint Security	Reston, US	1,001-5,000	88%	806 contacts →
6	Trustwave, A Levelblue Company	Chicago, US	501-1,000	88%	453 contacts →
7	SSH Communications Security	Helsinki, FI	51-200	85%	105 contacts →
8	Advens	Paris, FR	501-1,000	87%	325 contacts →
9	Group-Ib	Singapore, SG	501-1,000	87%	334 contacts →
10	Paramount Computer Systems	AE	201-500	87%	128 contacts →
11	Ultraviolet Cyber	Mclean, US	501-1,000	86%	268 contacts →
12	own.security	Paris, FR	51-200	87%	26 contacts →
13	Securityhq	Gb, GB	501-1,000	88%	286 contacts →
14	Protechmanize	Thane, IN	501-1,000	88%	75 contacts →
15	Safeway	Sao Paulo, BR	201-500	88%	13 contacts →
16	Kudelski Security	Cheseaux, CH	201-500	85%	187 contacts →
17	PT Itsec Asia TBK	Jakarta Selatan, ID	201-500	87%	59 contacts →
18	Neverhack	Paris, FR	1,001-5,000	85%	187 contacts →
19	Esec Forte Technologies	Gurugram, IN	201-500	86%	223 contacts →
20	SK Shieldus	KR	5,001-10,000	90%	7 contacts →
21	Total Cyber-Sec	Parques Del Pedregal Cdmx, MX	51-200	85%	28 contacts →
22	Nviso Security	BE	201-500	87%	204 contacts →
23	Quorum Cyber	Edinburgh, GB	201-500	85%	178 contacts →
24	Cipher A Prosegur Company	Miami, US	201-500	86%	64 contacts →
25	Sits Group	Wettingen, CH	501-1,000	87%	31 contacts →

Showing the 25 largest of 2674 similar companies

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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 SISA, 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 SISA 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 September 26, 2026. Lists refresh periodically as the graph is re-checked.

Frequently asked

What are SISA lookalikes?

SISA lookalikes are companies that closely resemble what SISA 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 SISA shown as a percentage.

What companies are similar to SISA?

The largest companies similar to SISA are Palo Alto Networks, Fortinet, Trellix and OPTIV. The table above shows the 25 largest of the 2674 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 SISA'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 36,310 verified emails and direct dials tracked across all 2674 matched companies.

Who are SISA's biggest competitors?

The largest SISA competitors by measured business-description similarity are Palo Alto Networks, Fortinet, Trellix and OPTIV. Every company here does what SISA does at 85%+ similarity, ranked by team size.

What are the best SISA alternatives?

The closest SISA alternatives are the companies whose own business descriptions match SISA'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 September 26, 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 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.