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Best Cybersecurity Companies in Naperville, IL (2026)

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

The short answer

  1. 1

    Best overall in Naperville: Fulton May Solutions, IFR Score 62/100; 5.0★ from 88 Google reviews; open evenings.

  2. 8

    Most-reviewed: iRepairTek (IT Services, Smartphone, Computer, Consoles and Tablet Repair), 520 Google reviews at 4.8★, the most of 325 ranked; ranked #8.

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

325 Naperville cybersecurity companies are ranked here by IFR Score, from nine published factors. 108 open Saturdays and 72 open Sundays, based on posted hours. The median Google rating is 5.0★ across 325 rated IT firms.

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

Top 10 cybersecurity companies in Naperville at a glance

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

Top 10 cybersecurity companies in Naperville at a glance
RankBusinessIFR ScoreGoogle ratingBased inHoursBest for
1Fulton May Solutions625.0★ (88)Downers Grove, 11 mi awayEveningsOverall
2ReachOut Digital Intelligence614.8★ (23)Mokena, 23 mi awaySat · Sun · Evenings—
3Media Moon, LLC.615.0★ (32)Hoffman Estates, 22 mi awaySat · Sun—
4Handled IT Partners614.9★ (21)Chicago, 27 mi awaySat · Sun · Evenings—
5Evolve Security614.8★ (132)Chicago, 27 mi away——
6The Isidore Group615.0★ (19)Chicago, 28 mi awaySat · Sun · Evenings—
7Nerd Rangers605.0★ (436)NapervilleSat · Evenings—
8iRepairTek (IT Services, Smartphone, Computer, Consoles and Tablet Repair)604.8★ (520)Bridgeview, 14 mi awaySat · Sun · EveningsMost reviews
9Intelligent Technical Solutions | ITS605.0★ (14)Chicago, 27 mi awaySat · Sun · Evenings—
10Entara, an Abacus Group Company594.1★ (15)Albany Park, 22 mi awaySat · Sun · Evenings—

The 325 best cybersecurity companies in Naperville, 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 Naperville

    #1 Fulton May Solutions

    Based in Downers Grove, 11 mi away

    62/100IFR Score

    Ranked #1 because of its Google rating and service focus: 5.0★ from 88 Google reviews, listed on Google as “Computer security service”.

    • 5.0★ from 88 Google reviews
    Hours
    Mon–Fri 7 AM–7 PM · Sat–Sun closed
    Address
    1200 Jorie Blvd #228, Oak Brook, IL 60523
    View profile for Fulton May Solutions(630) 282-4230

  3. #3 Media Moon, LLC.

    Based in Hoffman Estates, 22 mi away

    61/100IFR Score

    Ranked #3 because of its Google rating and service focus: 5.0★ from 32 Google reviews, listed on Google as “Computer security service”.

    • 5.0★ from 32 Google reviews
    Hours
    Mon–Sun 9 AM–5 PM
    Address
    4464 Harbor Cir, Hoffman Estates, IL 60192
    View profile for Media Moon, LLC.(331) 444-2491

  4. #4 Handled IT Partners

    Based in Chicago, 27 mi away

    61/100IFR Score

    Ranked #4 because of its Google rating and service focus: 4.9★ from 21 Google reviews, listed on Google as “Computer security service”.

    • 4.9★ from 21 Google reviews
    Hours
    Mon–Sun 12 AM–12 AM
    Address
    4950 Madison St, Chicago, IL 60076
    View profile for Handled IT Partners(312) 278-1118

  5. #5 Evolve Security

    Based in Chicago, 27 mi away

    61/100IFR Score

    Ranked #5 because of its Google rating and service focus: 4.8★ from 132 Google reviews, listed on Google as “Computer security service”.

    • 4.8★ from 132 Google reviews
    Hours
    Mon–Thu 9 AM–5 PM · Fri 9 AM–2 PM · Sat–Sun closed
    Address
    123 N Wacker Dr Ste 300, Chicago, IL 60606
    View profile for Evolve Security(312) 957-5682

  6. #6 The Isidore Group

    Based in Chicago, 28 mi away

    61/100IFR Score

    Ranked #6 because of its Google rating and service focus: 5.0★ from 19 Google reviews, listed on Google as “Computer security service”.

    • 5.0★ from 19 Google reviews
    Hours
    Mon–Sun 12 AM–12 AM
    Address
    205 N Michigan Ave Suit 810, Chicago, IL 60601
    View profile for The Isidore Group(844) 648-1887

  7. #7 Nerd Rangers

    Based in Naperville

    60/100IFR Score

    Ranked #7 because of its Google rating and review volume: 5.0★ from 436 Google reviews.

    • 5.0★ from 436 Google reviews
    Hours
    Mon–Wed 9:30 AM–6:30 PM · Thu 9:30 AM–4:30 PM · Fri 9:30 AM–6:30 PM · Sat 9:30 AM–4:30 PM · Sun closed
    Address
    200 E 5th Ave Ste 111, Naperville, IL 60563
    View profile for Nerd Rangers(630) 442-0141

  11. #11 Verity IT

    Based in Downers Grove, 7 mi away

    59/100IFR Score

    Ranked #11 because of its Google rating and service focus: 4.9★ from 34 Google reviews, listed on Google as “Computer security service”.

    • 4.9★ from 34 Google reviews
    Hours
    Mon–Fri 8 AM–5 PM · Sat–Sun closed
    Address
    3113 Woodcreek Dr Ste 102, Downers Grove, IL 60515
    View profile for Verity IT(224) 345-2630

  13. #13 Trustwave Holdings Inc

    Based in Chicago, 27 mi away

    59/100IFR Score

    Ranked #13 because of its Google rating and service focus: 4.2★ from 27 Google reviews, listed on Google as “Computer security service”.

    • 4.2★ from 27 Google reviews
    Hours
    Mon–Tue closed · Wed 12 PM–11:30 PM · Thu closed · Fri–Sun 12 PM–11:30 PM
    Address
    70 W Madison St Ste 600, Chicago, IL 60602
    View profile for Trustwave Holdings Inc(312) 873-7500

  18. #18 DEADCO LLC

    Based in Bolingbrook, 12 mi away

    57/100IFR Score

    Ranked #18 because of its Google rating and service focus: 5.0★ from 9 Google reviews, listed on Google as “Computer security service”.

    • 5.0★ from 9 Google reviews
    Hours
    Mon 9 AM–6:30 PM · Tue–Sat 8 AM–6:30 PM · Sun closed
    View profile for DEADCO LLC(630) 708-8998

  21. #21 SUPER V TECHNOLOGY

    Based in Hoffman Estates, 19 mi away

    57/100IFR Score

    Ranked #21 because of its Google rating and service focus: 5.0★ from 19 Google reviews, listed on Google as “Computer security service”.

    • 5.0★ from 19 Google reviews
    Hours
    Mon–Fri 8 AM–5 PM · Sat–Sun closed
    Address
    2750 W Higgins Rd, Hoffman Estates, IL 60169
    View profile for SUPER V TECHNOLOGY(916) 931-6788

How we ranked Naperville cybersecurity companies

We scored 325 Naperville 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 Naperville 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 Naperville: frequently asked questions

Who is the best cybersecurity company in Naperville?

By IFR Score, the highest-ranked cybersecurity company in Naperville, IL is Fulton May Solutions with an IFR Score of 62/100. It has 5.0★ from 88 Google reviews. It is open evenings. ReachOut Digital Intelligence (#2) and Media Moon, LLC. (#3) follow. We ranked 325 cybersecurity companies on nine factors, last updated November 9, 2026.

How many cybersecurity companies are there in Naperville?

ITFirmsRanked ranks 325 cybersecurity companies serving Naperville, IL. 3 of them are based in Naperville; the rest serve it from nearby towns. Counts are as of November 2026.

Which cybersecurity companies in Naperville work on weekends?

108 of 325 ranked cybersecurity companies post Saturday hours and 72 post Sunday hours. The highest-ranked open Saturdays are ReachOut Digital Intelligence (#2), Media Moon, LLC. (#3) and Handled IT Partners (#4). Posted hours are office hours; many firms also run an after-hours support line for contract clients.

What Google rating do Naperville cybersecurity companies have?

The median Google rating among 325 rated cybersecurity companies in Naperville is 5.0★, with a median of 15 reviews. iRepairTek (IT Services, Smartphone, Computer, Consoles and Tablet Repair) has the most, 520 reviews, and ranks #8. 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 Naperville count in this ranking?

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

  1. November 2026: IFR Scores recalculated for 325 cybersecurity companies serving Naperville.
  2. November 2026: 1 duplicate listing merged.

More cybersecurity companies and Naperville pages