Security system installation service · New Haven, CT · reviewed since 2016
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 55%82+44.7Reliability 24%78+18.9Value 14%94+13.3Replies to reviews 7%91+6.4Craft & service penalty98−0.2Experts Score= 83Grade 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.
#43 of 64 security system installersiPosition by Experts Score among all companies we track in this category. · better than 33%
4.8★★★★★44 Google reviews · 20 photos
93%five-star reviews
4.93★last 12 monthsiAverage stars on reviews from the last 12 months only.
2.8%1–2★ in 2 yearsiShare of 1–2★ reviews in the last 24 months — or the 20 newest reviews when the company had fewer than 20 in that time.
Google reviewers rate Mammoth Security highly for professional installation of camera systems, access control, and structured cabling. Customers frequently praise the company's punctuality, clear communication, and responsive monitoring services, noting that technicians are organized and thorough. While most feedback is positive, a minority of low-star reviews cite unresolved service issues and unprofessional owner behavior as reasons for cancellation.
Google rating: 4.8 out of 5 from 44 reviews (93% five-star).
Reviews on this page: 44 Google reviews (41 with written comments).
Owner responses: the business replied to 98% of reviews.
Most recent review: October 23, 2026.
Service: Security System Installer serving New Haven, Connecticut.
Data from Google, last updated November 5, 2026.
Score profile vs other security system installers
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 craft & service; weakest: reliability.
This companySecurity System Installers 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.Mammoth Security Inc. New Britain: 82/100 on this factor. Category median: 91.A
82
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.Mammoth Security Inc. New Britain: 78/100 on this factor. Category median: 91.B
78
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.Mammoth Security Inc. New Britain: 98/100 on this factor. Category median: 99.A
98
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.Mammoth Security Inc. New Britain: 94/100 on this factor. Category median: 100.A
94
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.Mammoth Security Inc. New Britain: 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.Mammoth Security Inc. New Britain: 91/100 on this factor. Category median: 49.A
91
Bar = this company · dark tick = category median.
Star ratings
44 Google reviews we collected
4.8of 5
5 stars4193%
4 stars00%
3 stars12%
2 stars00%
1 star25%
Praise vs complaints
Phrases our text analysis found in 41 written reviews
94%praise
Praise5194%
Complaints36%
PriceiGoogle asks reviewers whether the price was great, reasonable or overpriced; these are their answers.
Price verdicts customers left with their Google review
100%fair
Great price250%
Reasonable125%
Overpriced00%
Not sure125%
Topic share
How often each topic comes up in the written reviews
7topics
Staff & attitude1528%
Speed & response1120%
Quality & results815%
Communication611%
Price & value611%
Would recommend59%
Honesty & trust36%
What customers talk about
We read 41 written reviews and marked every phrase about these topics. The same colors are highlighted in the reviews.
“Their entire team has been professional, responsive, and reliable.”
“Mammouth in general has always been good to us and very responsive.”
“You can tell he is top notch at his job and he was a pleasure to work with today!”
“Carlos came out and did an install and did a fantastic job was very clear and concise and his work was exceptional”
“…t meet our buildings' evolving security needs, all while maintaining competitive pricing.…”
“I truly have no complaints and highly recommend Mammoth Security to anyone looking for dependable security and monitoring services.”
“Would not recommend.”
“Mammoth Security has been a trusted and reliable partner to the Farmington Libraries.”
People customers mention
Jocelyn3 reviews
praise complaint · found by our text analysis, Google review wording unchanged.
Recent reviews
BBrittanyLocal Guide · 33 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★★★★★
Victor came out today to help us out with some needs with our system and he went above and beyond to make sure we got what we needed. You can tell he is top notch at his job and he was a pleasure to work with today! Mammouth in general has always been good to us and very responsive.
AAbrahamLocal Guide · 30 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. · 3 weeks ago★★★★★
This company is great, and easy to work with. Very professional and friendly. Thanks for fixing my issue right away.
JJosh7 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 month ago★★★★★
Carlos came out and did an install and did a fantastic job was very clear and concise and his work was exceptional
Great price
CCameron4 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. · 3 months ago★★★★★
John was a great technician, he solved our issues quick and efficiently. Would definitely recommend this technician
Reasonable price
JJas7 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. · 4 months ago★★★★★
We have had an excellent experience working with Mammoth Security for our camera system and door strikes, and we're currently in the process of getting our fire panel monitoring through them as well. Their entire team has been professional, responsive, and reliable.
I especially want to recognize Jocelyn and…
TTheodore2 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. · 4 months ago★★★★★
Just relocated to New Britain for work and wanted security sorted before I'd even fully unpacked. Mammoth had someone out within two days and the install was done before the end of the week. The technician was efficient and personable
Victor came out today to help us out with some needs with our system and he went above and beyond to make sure we got what we needed. You can tell he is top notch at his job and he was a pleasure to work with today! Mammouth in general has always been good to us and very responsive.
Response from the owner · a week ago
Thank you Brittany! That means a lot considering you also represent a service based business. We're here to help whenever you need us.
A
Abraham AbudLocal Guide · 30 reviewsiTotal number of Google reviews Abraham has written across all businesses on Google Maps, not just this one.
We have had an excellent experience working with Mammoth Security for our camera system and door strikes, and we're currently in the process of getting our fire panel monitoring through them as well. Their entire team has been professional, responsive, and reliable.
I especially want to recognize Jocelyn and Victor. They have been nothing but honest, knowledgeable, and hands-on throughout the entire process. Every time I reach out, they provide exactly what I need and are always willing to help.
Their response time is fast, they're available when needed, and they resolve issues quickly and efficiently. I truly have no complaints and highly recommend Mammoth Security to anyone looking for dependable security and monitoring services.
Response from the owner · 4 months ago
Thank you Jas! We look forward to handling all of your security systems.
T
Theodore Finch2 reviewsiTotal number of Google reviews Theodore has written across all businesses on Google Maps, not just this one.
Just relocated to New Britain for work and wanted security sorted before I'd even fully unpacked. Mammoth had someone out within two days and the install was done before the end of the week. The technician was efficient and personable
Response from the owner · 3 weeks ago
Thank you Theo, we’re happy to hear this install went off without a hitch
O
Oliver Morris2 reviewsiTotal number of Google reviews Oliver has written across all businesses on Google Maps, not just this one.
Our family had been using a basic ring doorbell for years and finally decided to do things properly. Mammoth came out and installed a full perimeter camera setup plus an interior motion system and the upgrade is massive.
Response from the owner · 5 months ago
Thanks Oliver! We're here to help if you need us again
W
Will Lane2 reviewsiTotal number of Google reviews Will has written across all businesses on Google Maps, not just this one.
Our landlord recommended Mammoth after a package theft issue in our building. They installed a doorbell camera and two exterior cameras and the difference has been immediate, no more missing deliveries.
Response from the owner · 5 months ago
Thank you Will! Cameras have a way of keeping "honest" people honest :)
G
Glenn Stout1 reviewiTotal number of Google reviews Glenn has written across all businesses on Google Maps, not just this one.
