60/100IFR Score
Ranked #1 because of its Google rating and service focus: 5.0★ from 127 Google reviews, listed on Google as “Computer security service”.
Based on 8 of 9 factors; recency not yet collected.
Best Cybersecurity Companies in Portsmouth, NH (2026)
200 cybersecurity companies ranked by IFR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Portsmouth: Tech Advisors Managed IT Services, IFR Score 60/100; 5.0★ from 127 Google reviews.
- 26
Most-reviewed: WangPC Computer Service, 400 Google reviews at 4.7★, the most of 200 ranked; ranked #26.
Rankings can't be bought. IT providers can't pay to change their rank or score. How we rank
200 Portsmouth cybersecurity companies are ranked here by IFR Score, from nine published factors. 60 open Saturdays and 42 open Sundays, based on posted hours. The median Google rating is 5.0★ across 200 rated IT firms.
Top 10 cybersecurity companies in Portsmouth at a glance
Ranked by IFR Score from public data. Sponsored placements are labelled and never change the order.
| Rank | Business | IFR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Tech Advisors Managed IT Services | 60 | 5.0★ (127) | Boston, 52 mi away | — | Overall |
| 2 | Eagle Network Solutions | 60 | 5.0★ (70) | Bedford, 38 mi away | — | — |
| 3 | Reliable Networks | 59 | 4.9★ (52) | Biddeford, 31 mi away | — | — |
| 4 | TOSS C3 - Cybersecurity, Cloud Computing, Co-Managed IT & Information Security | 59 | 5.0★ (23) | Framingham Center, 67 mi away | Sat · Sun · Evenings | — |
| 5 | Techfusion Digital Forensics & Data Recovery | 59 | 4.4★ (39) | Cambridge, 51 mi away | Sat · Sun · Evenings | — |
| 6 | Compliance Scorecard | 59 | 4.8★ (13) | Dover, 10 mi away | Evenings | — |
| 7 | Slingshot Information Systems, Inc. | 58 | 5.0★ (35) | Gloucester, 30 mi away | — | — |
| 8 | New Era Technology | 58 | 4.5★ (8) | Portsmouth | — | — |
| 9 | Daystar | 58 | 5.0★ (11) | Boston, 53 mi away | Sat · Sun · Evenings | — |
| 10 | AGR Technologies Inc. | 58 | 4.7★ (39) | Grafton, 70 mi away | Sat · Sun | — |
The 200 best cybersecurity companies in Portsmouth, ranked
Ordered by IFR Score, a 0–100 score from nine published factors. Paid placement never changes the order.
Ranked by IFR Score from public data. Sponsored placements are labelled and never change the order.
Based in Bedford, 38 mi away
60/100IFR ScoreRanked #2 because of its Google rating and service focus: 5.0★ from 70 Google reviews, listed on Google as “Computer security service”.
Based on 8 of 9 factors; recency not yet collected.
Based in Biddeford, 31 mi away
59/100IFR ScoreRanked #3 because of its Google rating and service focus: 4.9★ from 52 Google reviews, listed on Google as “Computer security service”.
Based on 8 of 9 factors; recency not yet collected.
Based in Framingham Center, 67 mi away
59/100IFR ScoreRanked #4 because of its Google rating and service focus: 5.0★ from 23 Google reviews, listed on Google as “Computer security service”.
Based on 8 of 9 factors; recency not yet collected.
Based in Cambridge, 51 mi away
59/100IFR ScoreRanked #5 because of its Google rating and service focus: 4.4★ from 39 Google reviews, listed on Google as “Computer security service”.
Based on 8 of 9 factors; recency not yet collected.
Based in Dover, 10 mi away
59/100IFR ScoreRanked #6 because of its Google rating and service focus: 4.8★ from 13 Google reviews, listed on Google as “Computer security service”.
Based on 8 of 9 factors; recency not yet collected.
Based in Gloucester, 30 mi away
58/100IFR ScoreRanked #7 because of its Google rating and service focus: 5.0★ from 35 Google reviews, listed on Google as “Computer security service”.
Based on 8 of 9 factors; recency not yet collected.
Based in Portsmouth
58/100IFR ScoreRanked #8 because of its Google rating and service focus: 4.5★ from 8 Google reviews, listed on Google as “Computer security service”.
Based on 7 of 9 factors; recency and availability not yet collected.
#9 Daystar
Based in Boston, 53 mi away
58/100IFR ScoreRanked #9 because of its Google rating and service focus: 5.0★ from 11 Google reviews, listed on Google as “Computer security service”.
Based on 8 of 9 factors; recency not yet collected.
Based in Grafton, 70 mi away
58/100IFR ScoreRanked #10 because of its Google rating and service focus: 4.7★ from 39 Google reviews, listed on Google as “Computer security service”.
Based on 8 of 9 factors; recency not yet collected.
Based in Amesbury, 19 mi away
58/100IFR ScoreRanked #11 because of its Google rating and service focus: 5.0★ from 4 Google reviews, listed on Google as “Computer security service”.
Based on 8 of 9 factors; recency not yet collected.
#12 Prior IT
Based in Boston, 59 mi away
58/100IFR ScoreRanked #12 because of its Google rating and service focus: 5.0★ from 62 Google reviews, listed on Google as “Computer security service”.
Based on 8 of 9 factors; recency not yet collected.
Based in Boston, 53 mi away
57/100IFR ScoreRanked #13 because of its Google rating and service focus: 4.1★ from 13 Google reviews, listed on Google as “Computer security service”.
Based on 8 of 9 factors; recency not yet collected.
Based in Woburn, 44 mi away
57/100IFR ScoreRanked #14 because of its Google rating and service focus: 5.0★ from 38 Google reviews, listed on Google as “Computer security service”.
Based on 8 of 9 factors; recency not yet collected.
Based in Concord, 40 mi away
57/100IFR ScoreRanked #15 because of its Google rating and service focus: 4.8★ from 37 Google reviews, listed on Google as “Computer security service”.
Based on 8 of 9 factors; recency not yet collected.
#16 BCS365
Based in Rockland, 63 mi away
57/100IFR ScoreRanked #16 because of its Google rating and service focus: 3.9★ from 19 Google reviews, listed on Google as “Computer security service”.
Based on 8 of 9 factors; recency not yet collected.
#17 Ion Networking
Based in Portland, 51 mi away
57/100IFR ScoreRanked #17 because of its Google rating and service focus: 4.9★ from 34 Google reviews, listed on Google as “Computer security service”.
Based on 8 of 9 factors; recency not yet collected.
Based in Billerica, 35 mi away
56/100IFR ScoreRanked #18 because of its Google rating and service focus: 5.0★ from 12 Google reviews, listed on Google as “Computer security service”.
Based on 8 of 9 factors; recency not yet collected.
Based in Burlington, 47 mi away
56/100IFR ScoreRanked #19 because of its Google rating and service focus: 5.0★ from 21 Google reviews, listed on Google as “Computer security service”.
Based on 8 of 9 factors; recency not yet collected.
#20 Trig Web Design
Based in Windham, 62 mi away
56/100IFR ScoreRanked #20 because of its Google rating and service focus: 4.8★ from 24 Google reviews, listed on Google as “Computer security service”.
Based on 8 of 9 factors; recency not yet collected.
Based in Boston, 51 mi away
56/100IFR ScoreRanked #21 because of its Google rating and service focus: 5.0★ from 24 Google reviews, listed on Google as “Computer security service”.
Based on 8 of 9 factors; recency not yet collected.
#22 Roan Solutions
Based in Cambridge, 51 mi away
56/100IFR ScoreRanked #22 because of its Google rating and service focus: 5.0★ from 25 Google reviews, listed on Google as “Computer security service”.
Based on 8 of 9 factors; recency not yet collected.
#23 RMON Networks
Based in Derry, 24 mi away
56/100IFR ScoreRanked #23 because of its Google rating and service focus: 4.8★ from 12 Google reviews, listed on Google as “Computer security service”.
Based on 8 of 9 factors; recency not yet collected.
#24 NCS Global
Based in Rochester, 16 mi away
56/100IFR ScoreRanked #24 because of its Google rating and service focus: 4.7★ from 10 Google reviews, listed on Google as “Computer security service”.
Based on 8 of 9 factors; recency not yet collected.
Based in Portsmouth
55/100IFR ScoreRanked #25 because of its Google rating and review volume: 5.0★ from 23 Google reviews.
Based on 8 of 9 factors; recency not yet collected.
Cybersecurity companies ranked #26 to #50
#1 to #25 are shown in full above. Here are #26 to #50, in IFR Score order; each links to its profile. We publish the top 50 of 200 ranked cybersecurity companies here; the rest are on their profiles.
Also serving Portsmouth
20 more cybersecurity companies within 75 mi that we can't rank yet: too few reviews, or a service we couldn't confirm. Listed A to Z.
| Business | Google rating | Distance |
|---|---|---|
| Beth's In-Home Computer Services | 5.0★ (2) | 32 mi |
| Boston InfoSystems, Inc | 5.0★ (2) | 43 mi |
| Centripetal | In Portsmouth | |
| Cyber 360 Inc. | 4.5★ (2) | 42 mi |
| Daystar - Concord Managed IT Services Company | 5.0★ (2) | 41 mi |
| Ezentria, Inc | 5.0★ (2) | 43 mi |
| Fast-Teks On-Site Computer Services | 2.0★ (2) | 41 mi |
| FlexManage - Boston | 5.0★ (2) | 44 mi |
| HDSNE - Digital Dining | In Portsmouth | |
| Kinsherf Technology Group | 5.0★ (14) | In Portsmouth |
| Name Safe | 1.5★ (2) | 33 mi |
| Nerd-1-1 IT Consultants | 4.9★ (8) | In Portsmouth |
| NH Digital Group | 5.0★ (13) | In Portsmouth |
| NimbleNET IT & Computer Solutions | 5.0★ (10) | In Portsmouth |
| North Shore Data Services, Inc. | 5.0★ (2) | 21 mi |
| Resolve Technology - IT Support for Portsmouth and NH Businesses | 5.0★ (2) | In Portsmouth |
| RTM Communications, Inc. | 5.0★ (2) | 41 mi |
| Taylor Networks | 4.5★ (2) | 46 mi |
| TeamLogic IT | In Portsmouth | |
| Umbral Technologies LLC | 5.0★ (2) | 39 mi |
How we ranked Portsmouth cybersecurity companies
We scored 200 Portsmouth cybersecurity companies on nine factors, weighted as shown. An IT firm is ranked when its service is confirmed and it has 3 or more Google reviews or a claimed profile. An IT firm with no Google reviews scores zero on rating, review volume and recency. Other unknown factors are left out, not counted as zero. Scores last refreshed November 9, 2026.
Paid placement never changes a rank or score. Sponsored businesses are paid, labelled, limited to 3 and shown above the ranking, outside it.
| Factor | Weight | Computed from | In Portsmouth data |
|---|---|---|---|
| Reputation | 25% | Google star rating, adjusted for how many reviews back it | Measured |
| Review volume | 15% | Number of Google reviews, compared with the most-reviewed IT firm on the list | Measured |
| Recency | 10% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 5% | Weekly open hours, Saturday, Sunday and 24/7 support | Measured |
| Service focus | 15% | How clearly the firm does this service (its Google category and name) | Measured |
| Proximity | 5% | Based in the city scores highest, less the farther away it is | Measured |
| Claimed profile | 10% | The firm has claimed its IT Firms Ranked profile (free or paid earn the same) | Measured |
| Partnered | 5% | The firm links to IT Firms Ranked from its own website with our badge, checked periodically | Measured |
| Client reviews | 10% | Verified client reviews collected by IT Firms Ranked: their rating and how many there are | Measured |
How to choose a cybersecurity company
- Ask whether monitoring is staffed around the clock by the firm itself or by a partner.
- Ask for a sample assessment or penetration-test report with client details removed.
- Check experience with your industry’s rules (for example HIPAA, PCI DSS or CMMC).
- Ask what the firm does in the first hour of an incident, and whether that is in the contract.
- Ask for two or three references from clients of your size and industry, and call them.
- Get the scope, response times and price in writing before you sign, including how you leave and get your data back.
Questions to ask a cybersecurity company
- Is your security monitoring staffed 24/7, and by whom?
- Which frameworks do you assess against?
- What do your reports include, and do you re-test after we fix the findings?
- Do you handle incident response yourselves, and do you work with cyber insurers?
- What access will you need to our systems, and how is it controlled and logged?
- Which certifications do the people doing the work hold?
Terms explained
- MSP (managed service provider)
- A firm that runs a business’s IT for a recurring fee: monitoring, patching, help desk, backups and security tools.
- Co-managed IT
- An arrangement where an outside firm supports an in-house IT person or team, sharing tools and tasks.
- Break-fix
- IT support paid per incident or per hour, with no monthly agreement.
- SLA (service-level agreement)
- The contract terms for response and resolution times, uptime and support hours.
- Help desk
- The support line staff call or email for IT problems.
- RMM
- Remote monitoring and management software that lets an IT firm watch, patch and fix computers remotely.
- vCIO
- A virtual chief information officer: part-time IT strategy and budgeting from an outside firm.
- MSSP
- A managed security service provider: a firm that monitors and manages security tools around the clock.
- EDR / MDR
- Endpoint detection and response software, and the managed service of people watching its alerts (managed detection and response).
- MFA
- Multi-factor authentication: a second proof of identity, such as an app prompt, on top of a password.
- Penetration test
- An authorised, simulated attack on your systems to find weaknesses before criminals do.
- SOC 2
- An independent auditor’s report (AICPA standard) on a service provider’s security controls.
Cybersecurity companies in Portsmouth: frequently asked questions
Who is the best cybersecurity company in Portsmouth?
By IFR Score, the highest-ranked cybersecurity company in Portsmouth, NH is Tech Advisors Managed IT Services with an IFR Score of 60/100. It has 5.0★ from 127 Google reviews. Eagle Network Solutions (#2) and Reliable Networks (#3) follow. We ranked 200 cybersecurity companies on nine factors, last updated November 9, 2026.
How many cybersecurity companies are there in Portsmouth?
ITFirmsRanked ranks 200 cybersecurity companies serving Portsmouth, NH. 3 of them are based in Portsmouth; the rest serve it from nearby towns. Another 20 within 75 mi are listed but not ranked yet. Counts are as of November 2026.
Which cybersecurity companies in Portsmouth work on weekends?
60 of 200 ranked cybersecurity companies post Saturday hours and 42 post Sunday hours. The highest-ranked open Saturdays are TOSS C3 - Cybersecurity, Cloud Computing, Co-Managed IT & Information Security (#4), Techfusion Digital Forensics & Data Recovery (#5) and Daystar (#9). Posted hours are office hours; many firms also run an after-hours support line for contract clients.
What Google rating do Portsmouth cybersecurity companies have?
The median Google rating among 200 rated cybersecurity companies in Portsmouth is 5.0★, with a median of 15 reviews. WangPC Computer Service has the most, 400 reviews, and ranks #26. We adjust ratings for review count, so a few five-star reviews cannot top the list.
How does ITFirmsRanked rank cybersecurity companies?
Each cybersecurity company gets a 0–100 IFR Score from nine published factors, led by reputation (25%), review volume (15%), service focus (15%) and recency (10%). An IT firm with no Google reviews scores zero on rating, review volume and recency; other factors we cannot measure are left out. Only IT firms with a confirmed service and 3 or more reviews, or a claimed profile, are ranked.
Do cybersecurity companies outside Portsmouth count in this ranking?
Yes, if they are within 75 mi of the Portsmouth city center, our service radius for cybersecurity companies. Each listing shows where the IT firm is based and how far away it is. Proximity is 5% of the IFR Score, so a nearby IT firm gets a small edge.
Can cybersecurity companies pay to rank higher on ITFirmsRanked?
No. The IFR Score never reads payment status, and this ranking has 0 paid placements. Up to 3 Featured IT firms may appear above the list, labelled Sponsored and showing their honest rank.
What does a cybersecurity company do?
Cybersecurity companies assess and protect a business’s systems and data: security monitoring, endpoint protection, penetration testing, compliance support and incident response.
How are cybersecurity companies in Portsmouth ranked?
By IFR Score: Google rating and review volume, recent reviews, opening hours, how clearly the firm does cybersecurity, distance, a claimed profile, our badge and verified client reviews. Sponsored placements never change the order.
Do we need a cybersecurity firm if we already have an IT provider?
Sometimes. Many IT providers include basic security tools; a security firm adds specialist work such as 24/7 monitoring, penetration tests, compliance audits and incident response. Ask your IT provider what they cover and where they would bring in a specialist.
What is the difference between a security assessment and a penetration test?
An assessment reviews your policies, settings and controls against a framework. A penetration test is an authorised, simulated attack that tries to exploit weaknesses. Both end with a written report and a list of fixes.
Can a cybersecurity firm help with compliance?
Many help organisations prepare for requirements such as HIPAA, PCI DSS, CMMC or SOC 2. They can advise and assess, but only an independent auditor issues a SOC 2 report, and compliance is ultimately your responsibility.
Update log for Portsmouth
- November 2026: IFR Scores recalculated for 200 cybersecurity companies serving Portsmouth.
- November 2026: 2 duplicate listings merged.
More cybersecurity companies and Portsmouth pages
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