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Best IT Consultants in Mill Valley, CA (2026)

267 IT consultants ranked by IFR ScoreUpdated 0 paid placements in this rankingHow we rank →

The short answer

  1. 1

    Best overall in Mill Valley: 42, Inc., IFR Score 63/100; 5.0★ from 54 Google reviews; open 7 days a week.

  2. 13

    Most-reviewed: Jones IT, 431 Google reviews at 5.0★, the most of 267 ranked; ranked #13.

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

267 Mill Valley IT consultants are ranked here by IFR Score, from nine published factors. 84 open Saturdays and 60 open Sundays, based on posted hours. The median Google rating is 4.9★ across 267 rated IT firms.

Most of this list also appears on the IT consultants in San Francisco ranking. See IT consultants in San Francisco

Top 10 IT consultants in Mill Valley at a glance

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

Top 10 IT consultants in Mill Valley at a glance
RankBusinessIFR ScoreGoogle ratingBased inHoursBest for
142, Inc.635.0★ (54)Berkeley, 15 mi awaySat · Sun · EveningsOverall
2Sustainable Computing615.0★ (87)Alameda, 14 mi away——
3Ralph Doore Consulting604.9★ (21)Noe Valley, 12 mi awaySat · Sun · Evenings—
4Option Click Consulting605.0★ (22)Larkspur, 16 mi awaySat · Sun · Evenings—
5People 1st IT Inc. LLC594.9★ (299)San Francisco, 12 mi awaySat · Sun—
6BEARCloud, Inc595.0★ (32)San Francisco, 11 mi away——
7Intelligent Technical Solutions | ITS585.0★ (104)San Francisco, 7 mi awaySat · Sun · Evenings—
8The Marin Tech585.0★ (29)San Rafael, 7 mi away——
9Seashore IT585.0★ (6)San Francisco, 11 mi awaySat · Sun · Evenings—
10PC Professional Managed IT Services584.9★ (143)Oakland, 17 mi awaySat · Sun · Evenings—

The 267 best IT consultants in Mill Valley, 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 Mill Valley

    #1 42, Inc.

    Based in Berkeley, 15 mi away

    63/100IFR Score

    Ranked #1 because of its Google rating and service focus: 5.0★ from 54 Google reviews, listed on Google as “Computer consultant”.

    • 5.0★ from 54 Google reviews
    Hours
    Mon–Sun 7 AM–7 PM
    Address
    2150 Allston Way #300, Berkeley, CA 94704
    View profile for 42, Inc.(510) 548-7948

  2. #2 Sustainable Computing

    Based in Alameda, 14 mi away

    61/100IFR Score

    Ranked #2 because of its Google rating and service focus: 5.0★ from 87 Google reviews, listed on Google as “Computer consultant”.

    • 5.0★ from 87 Google reviews
    Hours
    Mon–Tue 10 AM–5 PM · Wed 10:30 AM–5 PM · Thu–Fri 10 AM–5 PM · Sat–Sun closed
    View profile for Sustainable Computing(240) 997-6875

  6. #6 BEARCloud, Inc

    Based in San Francisco, 11 mi away

    59/100IFR Score

    Ranked #6 because of its Google rating and service focus: 5.0★ from 32 Google reviews, listed on Google as “Computer consultant”.

    • 5.0★ from 32 Google reviews
    Hours
    Mon–Fri 7 AM–5 PM · Sat–Sun closed
    Address
    1160 Battery St suite 100, San Francisco, CA 94111
    View profile for BEARCloud, Inc(877) 232-7256

  8. #8 The Marin Tech

    Based in San Rafael, 7 mi away

    58/100IFR Score

    Ranked #8 because of its Google rating and service focus: 5.0★ from 29 Google reviews, listed on Google as “Computer consultant”.

    • 5.0★ from 29 Google reviews
    Hours
    Mon–Fri 9 AM–5 PM · Sat–Sun closed
    Address
    207 Devon Dr, San Rafael, CA 94903
    View profile for The Marin Tech(415) 747-0429

  9. #9 Seashore IT

    Based in San Francisco, 11 mi away

    58/100IFR Score

    Ranked #9 because of its Google rating and service focus: 5.0★ from 6 Google reviews, listed on Google as “Computer consultant”.

    • 5.0★ from 6 Google reviews
    Hours
    Mon–Sun 12 AM–12 AM
    Address
    95 3rd St 2nd Floor, San Francisco, CA 94103
    View profile for Seashore IT(844) 867-1587

  12. #12 Zbynet

    Based in San Rafael, 5 mi away

    58/100IFR Score

    Ranked #12 because of its Google rating and service focus: 5.0★ from 11 Google reviews, listed on Google as “Computer consultant”.

    • 5.0★ from 11 Google reviews
    Hours
    Mon–Sat 9 AM–6 PM · Sun closed
    Address
    819 A St Ste 23, San Rafael, CA 94901
    View profile for Zbynet(415) 717-0957

  13. #13 Jones IT

    Based in San Francisco, 12 mi away

    58/100IFR Score

    Ranked #13 because of its Google rating and review volume: 5.0★ from 431 Google reviews, the most in Mill Valley.

    • 5.0★ from 431 Google reviews
    Hours
    Mon–Fri 8 AM–6 PM · Sat–Sun closed
    Address
    1370 Harrison St, San Francisco, CA 94103
    View profile for Jones IT(415) 578-7111

  16. #16 KairosIT

    Based in Santa Rosa, 7 mi away

    56/100IFR Score

    Ranked #16 because of its Google rating and service focus: 5.0★ from 12 Google reviews, listed on Google as “Computer consultant”.

    • 5.0★ from 12 Google reviews
    Hours
    Mon–Fri 8 AM–5 PM · Sat–Sun closed
    View profile for KairosIT(844) 524-7674

  21. #21 Sysnatics IT Services

    Based in San Bruno, 21 mi away

    55/100IFR Score

    Ranked #21 because of its Google rating and service focus: 5.0★ from 5 Google reviews, listed on Google as “Computer consultant”.

    • 5.0★ from 5 Google reviews
    Hours
    Mon–Sun 7:30 AM–6 PM
    Address
    715 El Camino Real suit 206, San Bruno, CA 94066
    View profile for Sysnatics IT Services(650) 260-4006

  22. #22 Nerd Crossing

    Based in Benicia, 24 mi away

    55/100IFR Score

    Ranked #22 because of its Google rating and service focus: 4.4★ from 25 Google reviews, listed on Google as “Computer consultant”.

    • 4.4★ from 25 Google reviews
    Hours
    Mon–Fri 9 AM–6 PM · Sat–Sun closed
    Address
    77 Solano Square Ste 351, Benicia, CA 94510
    View profile for Nerd Crossing(510) 275-3475

  23. #23 GTron

    Based in El Sobrante, 13 mi away

    55/100IFR Score

    Ranked #23 because of its Google rating and review volume: 4.5★ from 129 Google reviews.

    • 4.5★ from 129 Google reviews
    Hours
    Mon–Sun 9 AM–7 PM
    Address
    3571 San Pablo Dam Rd STÉ 102, El Sobrante, CA 94803
    View profile for GTron(510) 356-5273

  24. #24 JimmyTech, LLC

    Based in Adelphi, 12 mi away

    55/100IFR Score

    Ranked #24 because of its Google rating and service focus: 5.0★ from 6 Google reviews, listed on Google as “Computer consultant”.

    • 5.0★ from 6 Google reviews
    Hours
    Mon–Thu 9 AM–5 PM · Fri–Sat closed · Sun 9 AM–5 PM
    View profile for JimmyTech, LLC(415) 510-2000

  25. #25 Sydewayz Cafe

    Based in Alameda, 20 mi away

    55/100IFR Score

    Ranked #25 because of its Google rating and service focus: 4.6★ from 17 Google reviews, listed on Google as “Computer consultant”.

    • 4.6★ from 17 Google reviews
    Hours
    Mon–Fri 9 AM–5 PM · Sat–Sun closed
    View profile for Sydewayz Cafe

How we ranked Mill Valley IT consultants

We scored 267 Mill Valley IT consultants 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 Mill Valley 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 an IT consultant

  1. Ask whether the consultant earns commissions or referral fees on products they recommend.
  2. Check experience with projects like yours, and ask for a sample deliverable.
  3. Agree the deliverables, timeline and price for each phase before work starts.
  4. Ask for two or three references from clients of your size and industry, and call them.
  5. Get the scope, response times and price in writing before you sign, including how you leave and get your data back.

Questions to ask an IT consultant

  • Do you receive commissions from any vendor you might recommend?
  • What will we receive at the end of the project?
  • Who will do the work, and what similar projects have they completed?
  • Do you bill hourly, per project or on retainer?
  • Will you work alongside our current IT provider?

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.

IT consultants in Mill Valley: frequently asked questions

Who is the best IT consultant in Mill Valley?

By IFR Score, the highest-ranked IT consultant in Mill Valley, CA is 42, Inc. with an IFR Score of 63/100. It has 5.0★ from 54 Google reviews. It is open 7 days a week. Sustainable Computing (#2) and Ralph Doore Consulting (#3) follow. We ranked 267 IT consultants on nine factors, last updated November 9, 2026.

How many IT consultants are there in Mill Valley?

ITFirmsRanked ranks 267 IT consultants serving Mill Valley, CA. Counts are as of November 2026.

Which IT consultants in Mill Valley work on weekends?

84 of 267 ranked IT consultants post Saturday hours and 60 post Sunday hours. The highest-ranked open Saturdays are 42, Inc. (#1), Ralph Doore Consulting (#3) and Option Click Consulting (#4). Posted hours are office hours; many firms also run an after-hours support line for contract clients.

What Google rating do Mill Valley IT consultants have?

The median Google rating among 267 rated IT consultants in Mill Valley is 4.9★, with a median of 12 reviews. Jones IT has the most, 431 reviews, and ranks #13. We adjust ratings for review count, so a few five-star reviews cannot top the list.

How does ITFirmsRanked rank IT consultants?

Each IT consultant 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 IT consultants outside Mill Valley count in this ranking?

Yes, if they are within 50 mi of the Mill Valley city center, our service radius for IT consultants. 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 IT consultants 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 an IT consultant do?

IT consultants advise on technology plans and projects: system selection, cloud migrations, budgets, security and compliance programmes, often as a part-time or virtual CIO.

How are it consultants in Mill Valley ranked?

By IFR Score: Google rating and review volume, recent reviews, opening hours, how clearly the firm does IT consulting, distance, a claimed profile, our badge and verified client reviews. Sponsored placements never change the order.

When does a business need an IT consultant rather than an IT provider?

For decisions and projects rather than day-to-day support: choosing a new system, planning a cloud move, setting an IT budget, preparing for an audit or reviewing an existing IT provider.

How do IT consultants charge?

By the hour, by the project or on a monthly retainer for ongoing virtual CIO work. Ask for a fixed price or a capped estimate on defined projects.

Update log for Mill Valley

  1. November 2026: IFR Scores recalculated for 267 IT consultants serving Mill Valley.
  2. November 2026: 2 duplicate listings merged.

More IT consultants and Mill Valley pages