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H3SystemsCybersecurity company in Napa, CA

H3Systems is a cybersecurity company at 2143 Holmes Ave, Napa, CA 94559, ranked #29 of 304 cybersecurity companies in Napa and rated 5.0 from 8 Google reviews. Open Tuesday to Thursday.

Facts here come from public sources and the firm itself. Confirm certifications, insurance and contract terms with the firm before you sign.

Napa, CAUpdated 0 paid placements in any rankingHow we rank

Call (707) 390-6100Website ↗

Key facts

Key facts about H3Systems
Address2143 Holmes Ave, Napa, CA 94559Get directions
Phone(707) 390-6100
Websiteh3systems.com
HoursTuesday and Wednesday: 9 AM – 5 PM; Thursday: 9 AM – 4 PM
Google rating5.0 from 8 Google reviews

Services

Each service shows the evidence we matched it on.

Service area

Serves Napa and 11 towns within 75 miles: American Canyon, Sonoma, Vallejo, Fairfield, Suisun, Vacaville, Benicia, Hercules, Pinole, Martinez and Petaluma.

Based in Napa, CAView on map

Opening hours

Opening hours for H3Systems
DayHours
MondayClosed
Tuesday9 AM – 5 PM
Wednesday9 AM – 5 PM
Thursday9 AM – 4 PM
FridayClosed
SaturdayClosed
SundayClosed
  • Open evenings — no
  • Open Saturdays — no
  • Open Sundays — no

Questions about H3Systems

How is H3Systems ranked in Napa?

H3Systems is ranked #29 of 304 cybersecurity companies in Napa by IFR Score, with 54 out of 100 as of November 2026. The score weighs reputation, review volume, recency, availability, service focus, proximity, claimed profile, partnered and client reviews. No business can pay to change its rank.

What are H3Systems’ hours?

H3Systems is open Tuesday to Thursday. Its listed hours are Tuesday and Wednesday, 9 AM – 5 PM; Thursday, 9 AM – 4 PM. It is closed on Saturdays and closed on Sundays. Hours come from the business listing; holiday hours may differ.

What areas does H3Systems serve?

Serves Napa and 11 towns within 75 miles: American Canyon, Sonoma, Vallejo, Fairfield, Suisun, Vacaville, Benicia, Hercules, Pinole, Martinez and Petaluma. The list is based on the business's location and the usual service radius for cybersecurity. Confirm your address is covered when you call.

What do Google reviews say about H3Systems?

H3Systems has a rating of 5.0 from 8 Google reviews. The IFR Score adjusts the star rating for review count, so a high rating from a few reviews counts for less than the same rating from many.

How do I contact H3Systems?

Call H3Systems on (707) 390-6100. The business is at 2143 Holmes Ave, Napa, CA 94559. Its website is linked in the key facts on this page. Ask for a written scope and quote before any work starts.

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Compare nearby cybersecurity companies

H3Systems compared with nearby businesses
BusinessRankIFR ScoreGoogle ratingSaturdaySundayDistance away
H3Systems (this business)—545.0 (8)NoNo
ManagedTEK - IT Security Services & Monitoring#27545.0 (12)NoNo17.9 mi
Raise Networks, Inc#28545.0 (17)NoNo29.2 mi
ER Tech Pros#30544.2 (5)YesYes51.6 mi

See all 304 ranked cybersecurity companies in Napa