Security guard service · Markham, IL · reviewed since 2024
iHow the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 69%86+59.5Reliability 31%76+23.4Experts Score= 83Not enough data for value, replies to reviews; its weight is shared by the others.Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews.83SCORE
AGradeiLetter from the Experts Score: A = 80+, B = 60–79, C = 40–59, D = 20–39, F = under 20.
#23 of 36 security guard servicesiPosition by Experts Score among all companies we track in this category. · better than 37%
4.8★★★★★25 Google reviews
96%five-star reviews
5.00★last 12 monthsiAverage stars on reviews from the last 12 months only.
5%1–2★, last 20 reviewsiShare of 1–2★ reviews in the last 24 months — or the 20 newest reviews when the company had fewer than 20 in that time.
Final Defense Security and Investigations at a glance
Google reviewers rate Final Defense Security and Investigations 4.8 out of 5 based on 25 reviews. Customers frequently describe the security guards as professional, punctual, and reliable for both event and retail protection. The company is noted for clear communication, competitive pricing, and a welcoming atmosphere for diverse communities. However, two one-star reviews express extreme dissatisfaction without providing specific details about the service failure.
Google rating: 4.8 out of 5 from 25 reviews (96% five-star).
Reviews on this page: 25 Google reviews (20 with written comments).
Owner responses: the business replied to 0% of reviews.
Most recent review: October 16, 2026.
Service: Security Guard Company serving Markham, Illinois.
Data from Google, last updated October 25, 2026.
Score profile vs other security guard services
Score per factor (100 = best)iEach factor is scored 0–100 on absolute terms (star average, share of 1–2★ reviews, price verdicts…); standing within the category can only raise it, never lower it.. Strongest: momentum and satisfaction; weakest: reliability.
This companySecurity Guard Services median0 = centre, 100 = best
SatisfactioniSatisfaction · 54% of the scoreRecency-weighted star average (2-year half-life), shrunk toward the category mean by review volume; the company’s own lifetime average as the prior; absolute: 4.0★ = 0, 5★ = 100.Final Defense Security and Investigations: 86/100 on this factor. Category median: 89.A
86
ReliabilityiReliability · 24% of the scoreHow rarely jobs go badly: share of 1–2★ reviews — 60% the last 24 months (or the 20 newest if fewer), 40% all-time; 0% = 100, 15%+ = 0; the category percentile can only raise it.Final Defense Security and Investigations: 76/100 on this factor. Category median: 89.B
76
Craft & serviceiCraft & service · penalty only, up to −10 pointsGoogle review highlights: Quality, Professionalism, Responsiveness, Punctuality — how rarely reviewers flag them as a negative, per review since highlights began; 0% = 100, 5%+ = 0. Subtracted from the score (up to −10), never averaged in — clean highlights are the norm, not a bonus.Not enough reviews for this factor yet. Category median: 100.–
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ValueiValue · 14% of the scoreCustomers’ own price verdicts (Great / Reasonable vs Overpriced) and Value highlights; 65% absolute (all “reasonable” ≈ 80, “great” = 100), the category percentile can only raise it.Not enough reviews for this factor yet. Category median: 90.–
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MomentumiMomentum · penalty only, up to −10 pointsPenalises only a real slide: last-12-month average below lifetime (−0.5★ = 0). Still 4.8★+ over the last year, or steady/improving = 100. Subtracted from the score (up to −10), never averaged in.Final Defense Security and Investigations: 100/100 on this factor. Category median: 100.A
100
Replies to reviewsiReplies to reviews · 7% of the scoreHow often the owner publicly replies to reviews under 5★ (1–4★). Needs 3+ such reviews, otherwise not counted; 65% absolute (80%+ replied = 100), the category percentile can only raise it.Not enough reviews for this factor yet. Category median: 79.–
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Bar = this company · dark tick = category median.
Star ratings
25 Google reviews we collected
4.8of 5
5 stars2496%
4 stars00%
3 stars00%
2 stars00%
1 star14%
Praise vs complaints
Phrases our text analysis found in 20 written reviews
97%praise
Praise3497%
Complaints13%
Topic share
How often each topic comes up in the written reviews
7topics
Staff & attitude1543%
Would recommend720%
Speed & response514%
Honesty & trust411%
Quality & results26%
Communication13%
Price & value13%
What customers talk about
We read 20 written reviews and marked every phrase about these topics. The same colors are highlighted in the reviews.
“The team delivers incredibly professional and reliable security guard services.”
“Highly recommend them to anyone looking for trustworthy and dependable security services!”
“Communicative, punctual, and most importantly reliable.”
“Professional, reliable, and efficient guards.”
“I was thoroughly impressed with the professionalism and top notch service that was provided!”
“I was very impressed with the cost and he made sure that everything ran smoothly and I would definitely recommend and hire this company again”
praise complaint · found by our text analysis, Google review wording unchanged.
Recent reviews
Vibhor4 reviewsiTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · a week ago★★★★★
Final Defense Security and Investigations provides absolutely top-tier service! As a private security and investigative agency, they truly stand out in the greater Chicagoland area. The team delivers incredibly professional and reliable security guard services. If you need peace of mind and a highly capable security…
Alondra4 reviewsiTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · a week ago★★★★★
An AMAZING company that truly values professionalism, reliability, and customer service. Their team is knowledgeable, attentive, and committed to providing a safe and secure environment. They also foster a welcoming and inclusive atmosphere, especially for the Latino community, which is something I truly appreciate.…
Joe1 reviewiTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · a week ago★★★★★
Recommended by a good friend of mine and didn’t disappoint. Communicative, punctual, and most importantly reliable.
Steven10 reviewsiTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · 2 weeks ago★★★★★
Officers were very professional. Stayed alert ensured that all guest were safe throughout the event
GermaineLocal Guide · 146 reviewsiTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · 2 years ago★★★★★
This company came highly recommended and they didn't disappoint. Very professional and efficient. I was able to enjoy my event without worrying about security doing their job! Thanks again Final Defense!
Paula11 reviewsiTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · 2 years ago★★★★★
Outstanding security services provided by this company. Professional, reliable, and efficient guards. Highly recommend for all security needs.
Final Defense Security and Investigations provides absolutely top-tier service! As a private security and investigative agency, they truly stand out in the greater Chicagoland area. The team delivers incredibly professional and reliable security guard services. If you need peace of mind and a highly capable security team, I cannot recommend them enough. Five stars!
Alondra Rodriguez4 reviewsiTotal number of Google reviews Alondra has written across all businesses on Google Maps, not just this one.
An AMAZING company that truly values professionalism, reliability, and customer service. Their team is knowledgeable, attentive, and committed to providing a safe and secure environment. They also foster a welcoming and inclusive atmosphere, especially for the Latino community, which is something I truly appreciate. Highly recommend them to anyone looking for trustworthy and dependable security services!!!!!
Joe Urban1 reviewiTotal number of Google reviews Joe has written across all businesses on Google Maps, not just this one.
This company came highly recommended and they didn't disappoint. Very professional and efficient. I was able to enjoy my event without worrying about security doing their job! Thanks again Final Defense!
Paula Taylor11 reviewsiTotal number of Google reviews Paula has written across all businesses on Google Maps, not just this one.
Meet with the security owner , very helpful and professional in meeting the needs of my security detail. I was very impressed with the cost and he made sure that everything ran smoothly and I would definitely recommend and hire this company again
Ali FaraLocal Guide · 6 reviewsiTotal number of Google reviews Ali has written across all businesses on Google Maps, not just this one.
I hired Final Defense Security for an event that I had, after another agency failed to follow through. I was thoroughly impressed with the professionalism and top notch service that was provided! Thanks again!!
