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The ATOM GroupCybersecurity company in Portsmouth, NH

The ATOM Group is a cybersecurity company at 1000 Market St, Portsmouth, NH 03801, ranked #38 of 200 cybersecurity companies in Portsmouth and rated 5.0 from 3 Google reviews. Open Monday to Friday.

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

Portsmouth, NHUpdated 0 paid placements in any rankingHow we rank

Call (603) 501-0003Website ↗

Key facts

Key facts about The ATOM Group
Address1000 Market St, Portsmouth, NH 03801Get directions
Phone(603) 501-0003
Websitetheatomgroup.com
HoursMonday to Friday: 9 AM – 6 PM
Google rating5.0 from 3 Google reviews

Services

Each service shows the evidence we matched it on.

Service area

Serves Portsmouth and 11 towns within 75 miles: Durham, Dover, Somersworth, Rochester, Salem, Derry Village, Derry, Windham, Londonderry, Manchester and Pelham.

Based in Portsmouth, NHView on map

Opening hours

Opening hours for The ATOM Group
DayHours
Monday9 AM – 6 PM
Tuesday9 AM – 6 PM
Wednesday9 AM – 6 PM
Thursday9 AM – 6 PM
Friday9 AM – 6 PM
SaturdayClosed
SundayClosed
  • Open evenings — no
  • Open Saturdays — no
  • Open Sundays — no

Questions about The ATOM Group

How is The ATOM Group ranked in Portsmouth?

The ATOM Group is ranked #38 of 200 cybersecurity companies in Portsmouth 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 The ATOM Group’s hours?

The ATOM Group is open Monday to Friday. Its listed hours are Monday to Friday, 9 AM – 6 PM. It is closed on Saturdays and closed on Sundays. Hours come from the business listing; holiday hours may differ.

What areas does The ATOM Group serve?

Serves Portsmouth and 11 towns within 75 miles: Durham, Dover, Somersworth, Rochester, Salem, Derry Village, Derry, Windham, Londonderry, Manchester and Pelham. 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 The ATOM Group?

The ATOM Group has a rating of 5.0 from 3 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 The ATOM Group?

Call The ATOM Group on (603) 501-0003. The business is at 1000 Market St, Portsmouth, NH 03801. 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

The ATOM Group compared with nearby businesses
BusinessRankIFR ScoreGoogle ratingSaturdaySundayDistance away
The ATOM Group (this business)—545.0 (3)NoNo
Systems Engineering#36545.0 (10)NoNo35.2 mi
C3#37544.2 (16)NoNo39.3 mi
KLC Consulting#39544.6 (19)NoNo51.3 mi

See all 200 ranked cybersecurity companies in Portsmouth