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Best Cybersecurity Companies in Londonderry, NH (2026)

235 cybersecurity companies ranked by IFR ScoreUpdated 0 paid placements in this rankingHow we rank →

The short answer

  1. 1

    Best overall in Londonderry: Eagle Network Solutions, IFR Score 62/100; 5.0★ from 70 Google reviews.

  2. 25

    Most-reviewed: WangPC Computer Service, 400 Google reviews at 4.7★, the most of 235 ranked; ranked #25.

Rankings can't be bought. IT providers can't pay to change their rank or score. How we rank

235 Londonderry cybersecurity companies are ranked here by IFR Score, from nine published factors. 72 open Saturdays and 49 open Sundays, based on posted hours. The median Google rating is 5.0★ across 235 rated IT firms.

Most of this list also appears on the Cybersecurity companies in Manchester ranking. See Cybersecurity companies in Manchester

Top 10 cybersecurity companies in Londonderry at a glance

Ranked by IFR Score from public data. Sponsored placements are labelled and never change the order.

Top 10 cybersecurity companies in Londonderry at a glance
RankBusinessIFR ScoreGoogle ratingBased inHoursBest for
1Eagle Network Solutions625.0★ (70)Bedford, 9 mi away—Overall
2Tech Advisors Managed IT Services615.0★ (127)Boston, 39 mi away——
3TOSS C3 - Cybersecurity, Cloud Computing, Co-Managed IT & Information Security615.0★ (23)Framingham Center, 39 mi awaySat · Sun · Evenings—
4AGR Technologies Inc.604.7★ (39)Grafton, 41 mi awaySat · Sun—
5Techfusion Digital Forensics & Data Recovery604.4★ (39)Cambridge, 34 mi awaySat · Sun · Evenings—
6Network Professional Training Center-NPTC595.0★ (46)Worcester, 50 mi awaySat—
7Prior IT595.0★ (62)Boston, 42 mi away——
8Daystar595.0★ (11)Boston, 39 mi awaySat · Sun · Evenings—
9First Class Networks595.0★ (38)Woburn, 28 mi away——
10New England Network Solutions584.1★ (13)Boston, 39 mi awaySat · Sun · Evenings—

The 235 best cybersecurity companies in Londonderry, 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.

Scores below: based on 8 of 9 factors; recency not yet collected. Hatched segments mark factors we don't have yet.

  1. Ranked #1 in Londonderry

    #1 Eagle Network Solutions

    Based in Bedford, 9 mi away

    62/100IFR Score

    Ranked #1 because of its Google rating and service focus: 5.0★ from 70 Google reviews, listed on Google as “Computer security service”.

    • 5.0★ from 70 Google reviews
    Hours
    Mon–Fri 8 AM–5 PM · Sat–Sun closed
    Address
    80 Palomino Ln STE 202, Bedford, NH 03110
    View profile for Eagle Network Solutions(603) 782-0700

  4. #4 AGR Technologies Inc.

    Based in Grafton, 41 mi away

    60/100IFR Score

    Ranked #4 because of its Google rating and service focus: 4.7★ from 39 Google reviews, listed on Google as “Computer security service”.

    • 4.7★ from 39 Google reviews
    Hours
    Mon–Thu 9 AM–6 PM · Fri 8:30 AM–6 PM · Sat 9 AM–4 PM · Sun 9 AM–1:30 PM
    Address
    300 W Main St A4, Northborough, MA 01532
    View profile for AGR Technologies Inc.(508) 422-9800

  7. #7 Prior IT

    Based in Boston, 42 mi away

    59/100IFR Score

    Ranked #7 because of its Google rating and service focus: 5.0★ from 62 Google reviews, listed on Google as “Computer security service”.

    • 5.0★ from 62 Google reviews
    Hours
    Mon–Fri 9 AM–5 PM · Sat–Sun closed
    Address
    1208 VFW Pkwy, Boston, MA 02132
    View profile for Prior IT(781) 228-0042

  8. #8 Daystar

    Based in Boston, 39 mi away

    59/100IFR Score

    Ranked #8 because of its Google rating and service focus: 5.0★ from 11 Google reviews, listed on Google as “Computer security service”.

    • 5.0★ from 11 Google reviews
    Hours
    Mon–Sun 12 AM–12 AM
    Address
    68 Harrison Ave Ste 640, Boston, MA 02111
    View profile for Daystar(888) 507-8067

  9. #9 First Class Networks

    Based in Woburn, 28 mi away

    59/100IFR Score

    Ranked #9 because of its Google rating and service focus: 5.0★ from 38 Google reviews, listed on Google as “Computer security service”.

    • 5.0★ from 38 Google reviews
    Hours
    Mon–Fri 9 AM–5 PM · Sat–Sun closed
    Address
    500 W Cummings Park, Woburn, MA 01801
    View profile for First Class Networks(617) 468-3929

  12. #12 Rune Forensics LLC

    Based in Amesbury, 21 mi away

    58/100IFR Score

    Ranked #12 because of its Google rating and service focus: 5.0★ from 4 Google reviews, listed on Google as “Computer security service”.

    • 5.0★ from 4 Google reviews
    Hours
    Mon–Sun 12 AM–12 AM
    Address
    110 Haverhill Rd #325, Amesbury, MA 01913
    View profile for Rune Forensics LLC(603) 758-8189

  13. #13 BCS365

    Based in Rockland, 54 mi away

    58/100IFR Score

    Ranked #13 because of its Google rating and service focus: 3.9★ from 19 Google reviews, listed on Google as “Computer security service”.

    • 3.9★ from 19 Google reviews
    Hours
    Mon–Sun 12 AM–12 AM
    Address
    1050 Hingham St 3rd floor, Rockland, MA 02370
    View profile for BCS365(781) 871-0700

  16. #16 Northeast Data Group

    Based in Burlington, 28 mi away

    57/100IFR Score

    Ranked #16 because of its Google rating and service focus: 5.0★ from 21 Google reviews, listed on Google as “Computer security service”.

    • 5.0★ from 21 Google reviews
    Hours
    Mon–Fri 7 AM–7 PM · Sat–Sun closed
    Address
    1500 District Ave, Burlington, MA 01803
    View profile for Northeast Data Group(617) 430-4725

  17. #17 Roan Solutions

    Based in Cambridge, 35 mi away

    57/100IFR Score

    Ranked #17 because of its Google rating and service focus: 5.0★ from 25 Google reviews, listed on Google as “Computer security service”.

    • 5.0★ from 25 Google reviews
    Hours
    Mon–Fri 8:30 AM–5:30 PM · Sat–Sun closed
    Address
    185 Alewife Brook Pkwy Unit 414, Cambridge, MA 02138
    View profile for Roan Solutions(617) 517-6444

  18. #18 Reliable Networks

    Based in Biddeford, 61 mi away

    57/100IFR Score

    Ranked #18 because of its Google rating and service focus: 4.9★ from 52 Google reviews, listed on Google as “Computer security service”.

    • 4.9★ from 52 Google reviews
    Hours
    Mon–Fri 8 AM–5 PM · Sat–Sun closed
    Address
    6 Shepherds Way, Biddeford, ME 04005
    View profile for Reliable Networks(207) 772-5678

  19. #19 Compliance Scorecard

    Based in Dover, 33 mi away

    57/100IFR Score

    Ranked #19 because of its Google rating and service focus: 4.8★ from 13 Google reviews, listed on Google as “Computer security service”.

    • 4.8★ from 13 Google reviews
    Hours
    Mon–Fri 12 AM–12 AM · Sat–Sun closed
    Address
    1 Lisa Beth Cir, Dover, NH 03820
    View profile for Compliance Scorecard(603) 819-5368

  21. #21 Cinch I.T.

    Based in Worcester, 43 mi away

    57/100IFR Score

    Ranked #21 because of its Google rating and review volume: 4.9★ from 114 Google reviews.

    • 4.9★ from 114 Google reviews
    Hours
    Mon–Fri 8 AM–5 PM · Sat–Sun 12 AM–12 AM
    Address
    27 W Mountain St, Worcester, MA 01606
    View profile for Cinch I.T.(833) 246-2448

  22. #22 Privafy, Inc.

    Based in Burlington, 28 mi away

    57/100IFR Score

    Ranked #22 because of its Google rating and service focus: 5.0★ from 3 Google reviews, listed on Google as “Computer security service”.

    • 5.0★ from 3 Google reviews
    Hours
    Mon–Sun 12 AM–12 AM
    Address
    2 Burlington Woods Dr Ste 200, Burlington, MA 01803
    View profile for Privafy, Inc.(781) 342-1077

  24. #24 RMON Networks

    Based in Derry, 11 mi away

    56/100IFR Score

    Ranked #24 because of its Google rating and service focus: 4.8★ from 12 Google reviews, listed on Google as “Computer security service”.

    • 4.8★ from 12 Google reviews
    Hours
    Mon–Fri 8 AM–5 PM · Sat–Sun closed
    Address
    2 Village Green Rd, Hampstead, NH 03841
    View profile for RMON Networks(603) 642-4010

How we ranked Londonderry cybersecurity companies

We scored 235 Londonderry 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.

Read the full method: formula, sources and exclusions

IFR Score factors and weights
FactorWeightComputed fromIn Londonderry data
Reputation25%Google star rating, adjusted for how many reviews back itMeasured
Review volume15%Number of Google reviews, compared with the most-reviewed IT firm on the listMeasured
Recency10%Share of reviews from the last 12 monthsNot yet collected
Availability5%Weekly open hours, Saturday, Sunday and 24/7 supportMeasured
Service focus15%How clearly the firm does this service (its Google category and name)Measured
Proximity5%Based in the city scores highest, less the farther away it isMeasured
Claimed profile10%The firm has claimed its IT Firms Ranked profile (free or paid earn the same)Measured
Partnered5%The firm links to IT Firms Ranked from its own website with our badge, checked periodicallyMeasured
Client reviews10%Verified client reviews collected by IT Firms Ranked: their rating and how many there areMeasured

How to choose a cybersecurity company

  1. Ask whether monitoring is staffed around the clock by the firm itself or by a partner.
  2. Ask for a sample assessment or penetration-test report with client details removed.
  3. Check experience with your industry’s rules (for example HIPAA, PCI DSS or CMMC).
  4. Ask what the firm does in the first hour of an incident, and whether that is in the contract.
  5. Ask for two or three references from clients of your size and industry, and call them.
  6. 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 Londonderry: frequently asked questions

Who is the best cybersecurity company in Londonderry?

By IFR Score, the highest-ranked cybersecurity company in Londonderry, NH is Eagle Network Solutions with an IFR Score of 62/100. It has 5.0★ from 70 Google reviews. Tech Advisors Managed IT Services (#2) and TOSS C3 - Cybersecurity, Cloud Computing, Co-Managed IT & Information Security (#3) follow. We ranked 235 cybersecurity companies on nine factors, last updated November 9, 2026.

Which cybersecurity companies in Londonderry work on weekends?

72 of 235 ranked cybersecurity companies post Saturday hours and 49 post Sunday hours. The highest-ranked open Saturdays are TOSS C3 - Cybersecurity, Cloud Computing, Co-Managed IT & Information Security (#3), AGR Technologies Inc. (#4) and Techfusion Digital Forensics & Data Recovery (#5). Posted hours are office hours; many firms also run an after-hours support line for contract clients.

What Google rating do Londonderry cybersecurity companies have?

The median Google rating among 235 rated cybersecurity companies in Londonderry is 5.0★, with a median of 13 reviews. WangPC Computer Service has the most, 400 reviews, and ranks #25. 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 Londonderry count in this ranking?

Yes, if they are within 75 mi of the Londonderry 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 Londonderry 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 Londonderry

  1. November 2026: IFR Scores recalculated for 235 cybersecurity companies serving Londonderry.
  2. November 2026: 5 duplicate listings merged.

More cybersecurity companies and Londonderry pages