Good Guard Security - Security Guard Services Company California

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<title>Good Guard Security - Security Guard Services Company California · reviews &amp; AI Score · Local AI Registry</title>
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# Local AI Registry

> The public record of what AI assistants say about local businesses. Every entry checked, scored, and kept current.

Local AI Registry is the editorial, never-sponsored record of what local
businesses are known for, and whether AI assistants actually recommend them.
We score every local business the same way and rank them: website, reviews,
AI visibility, and more. Eight signals, one number from 0 to 100. The heaviest
is whether AI can retrieve you at all.

## Read these first

- [Local AI Registry](https://localairegistry.com): AI assistants now decide which local business to recommend.
- [Methodology](https://localairegistry.com/methodology): Eight signals, one number from 0 to 100.
- [Leaderboards](https://localairegistry.com/leaderboards): Browse AI Score leaderboards by state, city, and category.
- [About](https://localairegistry.com/about): The honest record of who AI recommends.
- [Pricing](https://localairegistry.com/pricing): Four levels of presence, from a free registry entry to being the answer AI gives first in your market.
- [Journal](https://localairegistry.com/journal): How AI assistants decide which local businesses to recommend, and what owners can do about it.

## Business pages

- [Sitemap](https://localairegistry.com/sitemap.xml): Every business page on the registry, with the day each was last updated.
- Every business page has a markdown copy at its own address with `.md` on the end. The copy holds the same facts, marks and sources as the page, in the page's order: the photos with their captions, the team and their licenses, the reviews summary, and the questions locals asked with the replies. The page names it in its head and its HTTP `Link` header.

# Good Guard Security - Security Guard Services Company California, Chatsworth: a security guard service in Chatsworth (2026 guide)

Source: Local AI Registry, https://localairegistry.com/biz/ca/chatsworth/good-guard-security-security-guard-services-company-california-chatsworth-ca. Free to reuse with a link back.

By Steve Lee, founder and CEO of Local AI Registry. Fact-checked against 12 sources. Updated 2026-09-02. Owner review: not yet.

Canonical: https://localairegistry.com/biz/ca/chatsworth/good-guard-security-security-guard-services-company-california-chatsworth-ca

## Photos

- ![Photo 1](https://localairegistry.com/api/photo?src=https%3A%2F%2Fseoaesthetic-assets.sfo3.cdn.digitaloceanspaces.com%2Fphotos%2Fcmtjc452p0fsnye6be5aapbjd%2F0.jpg)
- ![Photo 2](https://localairegistry.com/api/photo?src=https%3A%2F%2Fseoaesthetic-assets.sfo3.cdn.digitaloceanspaces.com%2Fphotos%2Fcmtjc452p0fsnye6be5aapbjd%2F1.jpg)
- ![Photo 3](https://localairegistry.com/api/photo?src=https%3A%2F%2Fseoaesthetic-assets.sfo3.cdn.digitaloceanspaces.com%2Fphotos%2Fcmtjc452p0fsnye6be5aapbjd%2F2.jpg)
- ![Photo 4](https://localairegistry.com/api/photo?src=https%3A%2F%2Fseoaesthetic-assets.sfo3.cdn.digitaloceanspaces.com%2Fphotos%2Fcmtjc452p0fsnye6be5aapbjd%2F3.jpg)
- ![Photo 5](https://localairegistry.com/api/photo?src=https%3A%2F%2Fseoaesthetic-assets.sfo3.cdn.digitaloceanspaces.com%2Fphotos%2Fcmtjc452p0fsnye6be5aapbjd%2F4.jpg)


## In short

Good Guard Security - Security Guard Services Company California is a security guard service in Chatsworth, CA. Its AI Score is 26 of 100, which is poor.

Every fact on this page carries one of three marks: Confirmed (from their website, Google Business Profile, review sites, licensing boards, or measured by Local AI Registry), Visitor submitted (added by a person, with a date and how they know), or AI guess (what AI engines like ChatGPT are saying, not confirmed by anyone). Every mark points to a reference at the end of this page.


## Key facts

| Fact | Value |
| --- | --- |
| Type | Security guard service |
| Address | 21757 Devonshire St #10, Chatsworth, CA 91311, USA |
| Hours | Mon to Sun Open 24 hours |
| Phone | (800) 651-0491 |
| Owner | Nothing found |
| Rating | 4.1 across 56 reviews on Google |
| Known for | Nothing found |
| Prices | Nothing found |
| Quietest time | Nothing found |
| Parking | Nothing found |
| Last verified | September 19, 2026, 11:33 AM |


## All the details

Every row is something the owner can add or correct. Each one is marked Confirmed, Visitor submitted or AI guess, with where it came from.

| Group | Fact | Value | Mark | Evidence |
| --- | --- | --- | --- | --- |
| Location info | Address | 21757 Devonshire St #10, Chatsworth, CA 91311, USA | Confirmed | Google Business Profile, checked Sep 1, 2026 |
| Location info | Description | 21757 Devonshire St #10, Chatsworth, CA 91311 | Confirmed | Google Business Profile, checked Sep 1, 2026 |
| Location info | Hours | Mon to Sun Open 24 hours | Confirmed | Google Business Profile, checked Sep 1, 2026 |
| Location info | Mondays | Open 24 hours | Confirmed | Google Business Profile, checked Sep 1, 2026 |
| Location info | Name | Good Guard Security - Security Guard Services Company California | Confirmed | Google Business Profile, checked Sep 1, 2026 |
| Location info | Phone | (800) 651-0491 | Confirmed | Google Business Profile, checked Sep 1, 2026 |
| Hours | Monday | Open 24 hours | Confirmed | Google Business Profile, checked Sep 1, 2026 |
| Hours | Tuesday | Open 24 hours | Confirmed | Google Business Profile, checked Sep 1, 2026 |
| Hours | Wednesday | Open 24 hours | Confirmed | Google Business Profile, checked Sep 1, 2026 |
| Hours | Thursday | Open 24 hours | Confirmed | Google Business Profile, checked Sep 1, 2026 |
| Hours | Friday | Open 24 hours | Confirmed | Google Business Profile, checked Sep 1, 2026 |
| Hours | Saturday | Open 24 hours | Confirmed | Google Business Profile, checked Sep 1, 2026 |
| Hours | Sunday | Open 24 hours | Confirmed | Google Business Profile, checked Sep 1, 2026 |
| Services | Service | Aerospace defense security | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Always moving forward | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Comprehensive | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Contract vehicles | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Country club | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Energy utilities waste security | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Entertainment media security | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Executive protection | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Fire risk | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Fire risk security | AI guess | Nothing found |
| Services | Service | Logistics transportation security | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Mobile patrol | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Next generation technology | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Parking control | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Reliable protection | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Safety that moves | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Security guard services | AI guess | Nothing found |
| Services | Service | Smart surveillance | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Software technology security | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Technology integration | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Traffic control | Confirmed | Business website, checked Sep 19, 2026 |
| Links | Facebook | https://facebook.com/wix | AI guess | Our record |
| Links | Instagram | https://instagram.com/wix | AI guess | Our record |
| Links | TikTok | https://tiktok.com/@wix | AI guess | Our record |
| Links | Website | http://www.goodguardsecurity.com/ | Confirmed | Google Business Profile, checked Sep 1, 2026 |


## Services and prices

These are the 19 services Good Guard offers, with the price where we have one and where it came from.

| Service | Price | Price mark | Price evidence | Service mark |
| --- | --- | --- | --- | --- |
| Entertainment media security |  |  |  | Confirmed |
| Energy utilities waste security |  |  |  | Confirmed |
| Safety that moves |  |  |  | Confirmed |
| Reliable protection |  |  |  | Confirmed |
| Logistics transportation security |  |  |  | Confirmed |
| Executive protection |  |  |  | Confirmed |
| Aerospace defense security |  |  |  | Confirmed |
| Fire risk |  |  |  | Confirmed |
| Smart surveillance |  |  |  | Confirmed |
| Software technology security |  |  |  | Confirmed |
| Technology integration |  |  |  | Confirmed |
| Next generation technology |  |  |  | Confirmed |
| Parking control |  |  |  | Confirmed |
| Comprehensive |  |  |  | Confirmed |
| Always moving forward |  |  |  | Confirmed |
| Country club |  |  |  | Confirmed |
| Traffic control |  |  |  | Confirmed |
| Contract vehicles |  |  |  | Confirmed |
| Mobile patrol |  |  |  | Confirmed |


### Known for

Reviews not read yet, back on Scan Day.


## The team

Nothing found


## Visiting Good Guard

Address: 21757 Devonshire St #10, Chatsworth, CA 91311, USA. Phone: (800) 651-0491. Hours: Mon to Sun Open 24 hours. (Confirmed, Google Business Profile, checked September 1, 2026 at 5:05 PM.)


### Location info from Google Business Profile

Business description, written by Good Guard on its Google Business Profile: "21757 Devonshire St #10, Chatsworth, CA 91311"


### When to go

Busy times not read yet, back on Scan Day.


### Parking and getting in

Nothing found


### Nearby

| Place | Type | Distance |
| --- | --- | --- |
| Game n' Grounds | Cafe | 2 min walk |
| Guatemalan Bakery & Restaurant | Restaurant | 2 min walk |
| Vegan My Thai & Seafood | Thai restaurant | 2 min walk |
| Devonshire / Owensmouth | Bus stop | 2 min walk |
| Phở Saigon 1 | Vietnamese restaurant | 2 min walk |
| Devonshire Street and Owensmouth Avenue | Bus stop | 2 min walk |


## Reputation

4.1 average across 56 reviews: Google 25. (Confirmed, read September 1, 2026.)

Good Guard Security is recognized for its strong leadership and commitment to professionalism, though consistency in service delivery is a concern. (AI guess, from 56 reviews.)


### What people like

- Guards are professional and alert
- Effective for events with large crowds


### What people do not like

- Guards missing shifts without notice
- Unprofessional behavior from some guards
- Inexperienced staff sent to critical locations


### Press

No press story about Good Guard found yet.


### Awards

None named yet.


### Directories

Directory listings not read yet.


## Recent updates from Good Guard

Good Guard hasn't posted an update here yet.


## Questions people ask


### Finance options, anyone used them?

No answer yet


### how much is a first visit around here

No answer yet


### parking at Good Guard, where does everyone put the car?

No answer yet


### Coffee near Good Guard on Devonshire?

No answer yet


### anyone been to both here and Alliance Guard?

No answer yet


### first visit at Good Guard, what do I need to bring?

No answer yet


### anywhere cheaper than Good Guard in Chatsworth that is still good?

No answer yet


### best security guard service in Chatsworth

No answer yet


### membership, worth it or not

No answer yet


### Are the hours on Google right for Good Guard in Chatsworth?

No answer yet


### the good stuff about Good Guard, what is it?

No answer yet


### any last minute slots here?

No answer yet


### last update from here was when?

No answer yet


### Anything this place is known for doing well?

No answer yet


### do I need to book this place or can I just turn up?

No answer yet


### Downsides nobody puts in a five star review?

No answer yet


### Worth the hype at Good Guard?

No answer yet


## What AI gets wrong about Good Guard

We ask ChatGPT about Good Guard. These are the answers that disagree with the record.

ChatGPT, read by Local AI Registry on Sep 1, 2026.

No capture has disagreed with the record yet.


## The AI Score: 26 of 100

The AI Score measures how likely AI engines are to recommend a business, and how accurately. Chatsworth security guard services run 25 to 51. Fair starts at 45, good at 65. Good Guard scores 26, below the Chatsworth average of 31. The same method scores every business on the registry.

| Signal | Weight | Score | What it measures | Good Guard |
| --- | --- | --- | --- | --- |
| Retrieval grounding | 26 | 0 | Whether you appear in the ranked results AI retrieves and cites: AI-Overview citations, organic top-10 for your money queries, and the Bing index ChatGPT leans on. | Poor |
| Off-property attestation | 20 | 40 | Volume and consistency of what others say about you: YouTube mentions, branded web mentions, third-party “best-of” lists. The cause of retrievability. | Poor |
| AI visibility | 14 | 0 | Whether ChatGPT, Gemini, Perplexity, and AI Overviews name you, and whether they name you for the right service. | Nobody at all was recommended in the 1 answer we hold, so there is nothing to score. |
| Reviews & response | 12 | 75 | The star average is only one input. We also read volume, velocity, the specificity of review language, and response cadence. Specific reviews are what AI quotes verbatim. | Good |
| Backlink & citation authority | 8 | 56 | Domain authority and editorial quality of the sources that attest to you. | Fair |
| Google Business Profile | 8 | 90 | Required and recommended fields; update cadence. The listing AI pulls from first. | Good |
| Speed & mobile | 7 | 36 | Core Web Vitals at the 75th percentile, on a real phone. | Poor |
| Content freshness & schema | 5 | 81 | Crawl recency, intent alignment, valid JSON-LD, canonicals. | Good |

Full method: https://localairegistry.com/methodology


## How AI decides what to tell you about a security guard service

When you ask ChatGPT, Gemini or Google about a local business, the AI doesn't visit it. It reads what's already written about it: the business's website, its Google Business Profile, review sites, news stories and directories like this one. Then it repeats what those sources agree on.

That's why AI gets small facts wrong. If Yelp says a place is open Mondays and the website says it isn't, the AI has to pick one. The table above shows the answers that disagree with the record today.

The more sources agree, and the more specific they are, the more confidently AI recommends a business. A review that names who helped and what they did tells an AI far more than one that says "great place."


## How to choose a security guard service in California, with or without AI

A few checks take ten minutes and tell you more than any rating.

- Check that the hours and phone number match on Google, Yelp and the business's own website. Mismatches are how people end up at a locked door.
- Read reviews that name a person and what they did. Vague praise is easy to fake.
- Look for recent reviews and recent posts. A page nobody has touched in a year may not match the business today.
- Ask for the price before you go, and ask what it includes.
- Where the work needs a license, ask whose license it is and look it up with California.


## How to read the marks on this page

- Confirmed (solid circle): from a known source. The business website, its Google Business Profile, review sites like Yelp, Healthgrades and RealSelf, a licensing board, or measured by Local AI Registry.
- Visitor submitted (hollow circle): added or corrected by a person, with the date and how they know, like a phone call or a visit.
- AI guess (hollow triangle): what AI engines are saying right now. Nobody has confirmed it.


## About the author

Steve Lee is the founder and CEO of Local AI Registry and sets its editorial standards. He is a former Google executive in Search and a former Microsoft executive, with more than 20 years in digital: search, local discovery, and how people find businesses online. He is based in Irvine.

- Expertise: search at Google and Microsoft, AI search, answer engine optimization, generative engine optimization, local SEO, structured data and entity mapping.
- Industry: medical aesthetics, injectables, med spa operations and marketing.
- Disclosure: Local AI Registry sells services to business owners, including Good Guard if it claims this page. That does not change what this page says. Every fact carries its source.


## Entity map

Every person, place, organization and treatment named on this page, with a stable ID and a public reference. The JSON-LD below connects them to each other.

| Entity | Type | ID on this page | Same as | Relationship to Good Guard |
| --- | --- | --- | --- | --- |
| Good Guard Security - Security Guard Services Company California | LocalBusiness | #business | http://www.goodguardsecurity.com/ | Subject of this page |
| Chatsworth, California | City | #city | Nothing found | City Good Guard is in |
| Local AI Registry | Organization | #publisher | https://localairegistry.com | Publisher of this page |
| Steve Lee | Person | #author | https://localairegistry.com/team | Author of this page |


## Topical map

Where this page sits in the registry. It's one profile among the security guard services in Chatsworth, linked to the lists and towns around it.


### Lists

- Best security guard services in Chatsworth: https://localairegistry.com/leaderboards/ca/chatsworth/security-guard-service
- Best businesses in Chatsworth: https://localairegistry.com/leaderboards/ca/chatsworth


### Nearby

- /los-angeles: https://localairegistry.com/leaderboards/ca/los-angeles
- /san-francisco: https://localairegistry.com/leaderboards/ca/san-francisco
- /san-jose: https://localairegistry.com/leaderboards/ca/san-jose
- /san-diego: https://localairegistry.com/leaderboards/ca/san-diego
- /irvine: https://localairegistry.com/leaderboards/ca/irvine
- /fresno: https://localairegistry.com/leaderboards/ca/fresno


### Every list

- Every leaderboard in California: https://localairegistry.com/leaderboards/ca


## Frequently asked questions


### What is AI search optimization for local business?

Getting a business named when a neighbor asks ChatGPT, Gemini, or Perplexity for a recommendation. Some call it AI SEO, some call it generative engine optimization. Traditional SEO fights for ten blue links; this fights for the one answer an assistant says out loud. The AI Score on this page measures the eight signals that drive it.


### What is Local AI Registry?

The public record of how AI sees local business. We score every business we list by one published method, we keep the questions people ask about it in one place, and we never sell rank. Looking up any business here is free.


### How does this page help a business get recommended by AI?

Assistants read public pages before they answer. This one states what the business does, what people ask about it, and what the Record answers, in one place a machine can read. Correcting what is wrong here changes what an assistant repeats next.


### Who writes the answers here?

Registry AI writes the first answer under every question, from the Record and the public sources named beneath it. Neighbors write the rest under pseudonyms. A registered owner can reply as the business, and their reply says so.


### I own Good Guard Security - Security Guard Services Company California. How do I fix something or rank higher?

Register the page. It is free, it takes about five minutes, and it lets you correct the Record and reply as the business. Nothing on this page is for sale, so the only thing that moves the score is the work.


## References


### Sources cited

- [1] Google Business Profile, https://www.google.com/maps/place/?q=place_id:ChIJKZ254kqXwoARuuymsghffnk (accessed Sep 1, 2026)
- [2] goodguardsecurity.com, https://www.goodguardsecurity.com/traffic-control (accessed Sep 19, 2026)
- [3] goodguardsecurity.com, https://www.goodguardsecurity.com/security-services (accessed Sep 19, 2026)
- [4] goodguardsecurity.com, https://www.goodguardsecurity.com/contract-vehicles-gsa-mas-schedule (accessed Sep 19, 2026)
- [5] goodguardsecurity.com, https://www.goodguardsecurity.com/country-club (accessed Sep 19, 2026)
- [6] goodguardsecurity.com, https://www.goodguardsecurity.com/energy-utilities-waste-security (accessed Sep 19, 2026)
- [7] goodguardsecurity.com, https://www.goodguardsecurity.com/entertainment-media-security (accessed Sep 19, 2026)
- [8] goodguardsecurity.com, https://www.goodguardsecurity.com/aerospace-defense-security (accessed Sep 19, 2026)
- [9] goodguardsecurity.com, https://www.goodguardsecurity.com/logistics-transportation-security (accessed Sep 19, 2026)
- [10] goodguardsecurity.com, https://www.goodguardsecurity.com/parking-control (accessed Sep 19, 2026)
- [11] goodguardsecurity.com, https://www.goodguardsecurity.com/software-technology-security (accessed Sep 19, 2026)
- [12] AI engine output: ChatGPT, read by Local AI Registry on Sep 1, 2026, https://localairegistry.com/methodology (accessed Sep 19, 2026)