The Best Security System Installers in Tustin, CA
We graded 9 companies on seven things customers actually report: satisfaction, reliability, workmanship, value, momentum, track record and how owners handle complaints.
From 19,508 Google reviews of 44 top-rated security system installers nationwide; 9 of them in Tustin, CA. Updated November 1, 2026.
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Best security system installers in Tustin for installation
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Smart Systems TechnologiesHow Job match is calculatedBuilt only from reviews Google tagged “Installation”:Stars on this job 55%4.85★Number of such jobs 25%78Overall Experts Score 20%79Job match= 84Stars are pulled toward the category average (4.87★) 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.84
Launch SystemsHow Job match is calculatedBuilt only from reviews Google tagged “Installation”:Stars on this job 55%5.00★Number of such jobs 25%6Overall Experts Score 20%94Job match= 79Stars are pulled toward the category average (4.87★) 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.79Job match = this company’s ★ on reviews Google tagged “Installation” (shrunk toward the category average when there are few), how many such jobs it has done, and its overall Experts Score.
What customers said about installation
Smart Systems TechnologiesAlfred Hernandez represents your company very well. He did a stellar job , of installing and educating me on the system. He deserves 6 stars !!!
Smart Systems TechnologiesSST provider John was wonderful. I really appreciated his patience and work ethic.
Smart Systems TechnologiesJohn, the SST technician did an excellent job on the installation. He explained clearly how the upgraded system works.Great customer service.
Smart Systems TechnologiesOur alarm system is old and needs replacement. Alfred and John from Smart Systems Technologies came and replaced the whole system, including installation, re-wiring, and programming. The whole process only took 3 hours, and now we have the state of the art system at an affordable price. Both Alfred and John are wonderful and efficient.
Smart Systems TechnologiesJohn was very helpful and kind. He was great at explaining all the details about the alarm and answering all of our questions.
Smart Systems TechnologiesAl is a fantastic and very professional technician. He is an amazing guy far beyond a technician.
Overall ratings
Experts Score 0–100Experts Score (0–100)Absolute quality first: recency-weighted star average (≈54%), share of 1–2★ reviews (≈24%), customers’ price verdicts (≈14%), owner replies to critical reviews (≈7%); minus up to 10 points each for complaints flagged in Google review highlights and for a real slide in recent ratings. Hover a company’s score on its page for the full breakdown. and a letter grade per factor (A = top 20% of security system installers).
| # | Company | ScoreExperts Score (0–100)Absolute quality first: recency-weighted star average (≈54%), share of 1–2★ reviews (≈24%), customers’ price verdicts (≈14%), owner replies to critical reviews (≈7%); minus up to 10 points each for complaints flagged in Google review highlights and for a real slide in recent ratings. Hover a company’s score on its page for the full breakdown. | FactorsFactor grades, in orderSatisfaction (54%): Recency-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.Reliability (24%): How 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.Craft & service (0%): Google 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.Value (14%): Customers’ own price verdicts (Great / Reasonable vs Overpriced) and Value highlights; 65% absolute (all “reasonable” ≈ 80, “great” = 100), the category percentile can only raise it.Momentum (0%): Penalises 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.Replies to reviews (7%): How 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.One letter per factor score: A = 80+, B = 60–79, C = 40–59, D = 20–39, F = below 20. | ★Google star rating as shown on Google Maps. | Typical billMedian bill customers of this company reported in their reviews (needs 3+ priced reviews). |
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| 1 |  Burgi Technologies | Managed IT & CybersecurityTustin, CA | A 99How 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%100+69.2Reliability 31%98+30.2Experts Score= 99Not 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. | AA––A– | 5.00 | — |
| 2 |  Modern Tech LLC - Security camerasTustin, CA | A 98How 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 59%98+57.5Reliability 26%96+25Value 15%100+15.2Experts Score= 98Not enough data for 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. | AA–AA– | 5.00 | — |
| 3 |  Comlock Security GroupTustin, CA | A 97How 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%98+67.8Reliability 31%95+29.2Experts Score= 97Not 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. | AA––A– | 4.95 | — |
| 4 |  DPS Security Services- Local ADT Authorized DealerTustin, CA | A 97How 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 59%98+57.5Reliability 26%96+25Value 15%96+14.6Craft & service penalty97−0.3Experts Score= 97Not enough data for 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. | AAAAA– | 5.00 | — |
| 5 |  Digital Installers IncTustin, CA | A 97How 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%97+67.2Reliability 31%96+29.5Experts Score= 97Not 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. | AA–––– | 5.00 | — |
| 6 | Launch SystemsTustin, CA | A 94How 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 59%95+55.8Reliability 26%97+25.3Value 15%87+13.2Craft & service penalty98−0.2Experts Score= 94Not enough data for 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. | AAAAA– | 4.96 | — |
| 7 | Alert 360 Home & Business Security Los AngelesTustin, CA | A 84How 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 64%90+57.2Reliability 28%82+23.2Replies to reviews 8%45+3.7Experts Score= 84Not enough data for value; its weight is shared by the others.Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AA––AC | 4.91 | — |
| 8 | Smart Systems TechnologiesTustin, CA | B 79How 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%82+19.9Value 14%100+14.1Replies to reviews 7%24+1.7Craft & service penalty52−4.8Experts Score= 79Grade B: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AACAAD | 4.76 | — |
| 9 |  Tech Security USATustin, CA | C 50How 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%74+40.4Reliability 24%49+11.9Value 14%25+3.5Replies to reviews 7%26+1.8Craft & service penalty62−3.8Momentum penalty61−3.9Experts Score= 50Grade C: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | BCBDBD | 4.85 | — |
What jobs cost
What customers paid, from the price Google asks reviewers to report.
| Job | Low25th percentile: 1 in 4 customers paid less than this. | TypicalMedian of the bill customers reported in their Google review (Google asks reviewers for a price range; we use the middle of each range). | High75th percentile: 1 in 4 customers paid more than this. | FairOf customers who rated the price, the share who chose “Great price” or “Reasonable” rather than “Overpriced”. |
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Security System Installers in Tustin, CA at a glance
How the 9 security system installers we rated in Tustin, CA compare, and what customers praise most.
Experts Score grades
A = score 80+, F = below 20.
- Grade A778%
- Grade B111%
- Grade C111%
- Grade D00%
- Grade F00%
Google ratings
Average stars per company.
- 4.90★ and up778%
- 4.80–4.89★111%
- 4.60–4.79★111%
- Below 4.60★00%
What customers praise
Share of Google review highlights.
- Quality32420%
- Professionalism36223%
- Responsiveness33321%
- Punctuality29419%
- Value27517%
Was the price fair?
All price verdicts left with reviews.
- Great price19250%
- Reasonable17746%
- Overpriced10%
- Not sure133%
Price verdicts by year
Share calling it great / reasonable / overpriced.
How we grade
Satisfaction (54%) — Recency-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.
Reliability (24%) — How 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.
Craft & service (penalty, up to −10) — Google 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.
Value (14%) — Customers’ own price verdicts (Great / Reasonable vs Overpriced) and Value highlights; 65% absolute (all “reasonable” ≈ 80, “great” = 100), the category percentile can only raise it.
Momentum (penalty, up to −10) — Penalises 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.
Replies to reviews (7%) — How 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.