Experts Reviews · Company report
How 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%88+48Reliability 24%90+21.8Value 14%100+14.1Replies to reviews 7%53+3.7Experts Score= 88Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews.88SCOREFoster Brothers Security Systems
Santa Clara, CA · Grade ALetter from the Experts Score: A = 80+, B = 60–79, C = 40–59, D = 20–39, F = under 20. · #19Position by Experts Score among all companies we track in this category. of 36 security guard services · 4.8★ from 182 Google reviews
Report card
Percentile vs other security guard services (100 = best)Each 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: value and momentum; weakest: replies to reviews.
SatisfactionSatisfaction · 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.Foster Brothers Security Systems is better than 88% of security guard services.A
88
ReliabilityReliability · 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.Foster Brothers Security Systems is better than 90% of security guard services.A
90
Craft & serviceCraft & service · 0% of the scoreGoogle 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.Foster Brothers Security Systems is better than —% of security guard services.–
—
ValueValue · 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.Foster Brothers Security Systems is better than 100% of security guard services.A
100
MomentumMomentum · 0% of the scorePenalises 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.Foster Brothers Security Systems is better than 100% of security guard services.A
100
Replies to reviewsReplies 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.Foster Brothers Security Systems is better than 53% of security guard services.C
53
Reviews for your job
Customers hired Foster Brothers Security Systems for 8 kinds of job.
Foster Brothers Security Systems for repair hardware
Clear ✕Jobs reviewedHow many Google reviews are tagged with this job.3
★ on this jobAverage stars on the reviews where the customer tagged this exact job (Google’s “Services” field).5.00
Usually paidThe price range customers picked most often for this job.$500+
Rank for this jobPosition of this company in the Job match ranking for this job among the companies we track.Its Job match: 91/100.How Job match is calculatedBuilt only from reviews Google tagged “Repair hardware”:Stars on this job 55%Number of such jobs 25%Overall Experts Score 20%Stars are pulled toward the category average when a company has few tagged jobs, so 3 perfect reviews don’t beat 80 great ones. 4.3★ scores 0, 5.0★ scores full. Volume is compared with the busiest company for this job.#1 / 1
Said fairOf customers who rated the price, the share who chose “Great price” or “Reasonable” rather than “Overpriced”.100%
All 3 Google reviews tagged “Repair hardware”
Robert6 reviewsTotal 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. · Edited 2 days ago★★★★★
We are a commercial lock, door, and safe company. We have National accounts and Foster Brothers Security Systems is our go-to company for our South SF Bay Area markets. Fast service. Always had the time and part. Been working with this company for years. Thank you!!!
Great priceBuilding lockoutsSafe lock install, open & repairLock rekeying
Thomas1 reviewTotal 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. · 11 months ago★★★★★
Quick, and efficient
Door lock & bolt hardware repairInstallationRepair hardware
paul4 reviewsTotal 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 months ago★★★★★
Rating only, no written review.
Paid $500+Reasonable priceLock rekeyingCoded key copyingDoor lock & bolt hardware repair
Price
$105-28% vs typical security guard services
Bar = middle half of what customers paid · gold mark = category median.
Price verdictsGoogle asks reviewers whether the price was great, reasonable or overpriced; these are their answers.
Great price 62%Reasonable 38%Overpriced 0%Not sure 0%
Jobs customers hired them for
| Job | Reviews | Category typical |
|---|---|---|
| Lock rekeying | 14 | — |
| Door lock & bolt hardware repair | 9 | — |
| Installation | 9 | — |
| Door lock & bolt hardware installation | 6 | — |
| Security door locks | 5 | — |
| Standard key copying | 5 | — |
| Coded key copying | 4 | — |
| Repair hardware | 3 | — |
