69/100IFR Score
Ranked #1 because of its Google rating and review volume: 4.9★ from 321 Google reviews, the most in Denver.
Based on 8 of 9 factors; recency not yet collected.
Best Business Phone System Providers in Denver, CO (2026)
106 business phone system providers ranked by IFR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Denver: Total Wireless, IFR Score 69/100; 4.9★ from 321 Google reviews; open 7 days a week.
- 3
Most-reviewed: Boost Mobile, 201 Google reviews at 4.4★, the most of 106 ranked after Total Wireless; ranked #3.
Rankings can't be bought. IT providers can't pay to change their rank or score. How we rank
106 Denver business phone system providers are ranked here by IFR Score, from nine published factors. 39 open Saturdays and 28 open Sundays, based on posted hours. The median Google rating is 4.8★ across 106 rated IT firms.
Top 10 business phone system providers in Denver 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 | Total Wireless | 69 | 4.9★ (321) | Aurora, 10 mi away | Sat · Sun · Evenings | Overall |
| 2 | Total Wireless | 65 | 5.0★ (131) | Brighton, 18 mi away | Sat · Sun · Evenings | — |
| 3 | Boost Mobile | 65 | 4.4★ (201) | Aurora, 7 mi away | Sat · Sun · Evenings | Most reviews |
| 4 | Total Wireless | 64 | 4.9★ (66) | Littleton, 8 mi away | Sat · Sun · Evenings | — |
| 5 | Total Wireless | 63 | 4.4★ (90) | Aurora, 7 mi away | Sat · Sun · Evenings | — |
| 6 | Total Wireless | 62 | 4.8★ (49) | Aurora, 9 mi away | Sat · Sun · Evenings | — |
| 7 | Boost Mobile | 62 | 3.8★ (106) | Aurora, 6 mi away | Sat · Sun · Evenings | — |
| 8 | CloudZen Partners | 60 | 5.0★ (11) | Denver | Sat · Sun · Evenings | — |
| 9 | Total Wireless | 60 | 4.8★ (22) | Arvada, 6 mi away | Sat · Sun · Evenings | — |
| 10 | Liberty Communications/FlexFone | 60 | 5.0★ (37) | Westminster, 12 mi away | Sat | — |
The 106 best business phone system providers in Denver, 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 Brighton, 18 mi away
65/100IFR ScoreRanked #2 because of its Google rating and service focus: 5.0★ from 131 Google reviews, listed on Google as “Telecommunications service provider”.
Based on 8 of 9 factors; recency not yet collected.
#3 Boost Mobile
Based in Aurora, 7 mi away
65/100IFR ScoreRanked #3 because of its Google rating and service focus: 4.4★ from 201 Google reviews, listed on Google as “Telecommunications service provider”.
Based on 8 of 9 factors; recency not yet collected.
Based in Littleton, 8 mi away
64/100IFR ScoreRanked #4 because of its Google rating and service focus: 4.9★ from 66 Google reviews, listed on Google as “Telecommunications service provider”.
Based on 8 of 9 factors; recency not yet collected.
Based in Aurora, 7 mi away
63/100IFR ScoreRanked #5 because of its Google rating and service focus: 4.4★ from 90 Google reviews, listed on Google as “Telecommunications service provider”.
Based on 8 of 9 factors; recency not yet collected.
Based in Aurora, 9 mi away
62/100IFR ScoreRanked #6 because of its Google rating and service focus: 4.8★ from 49 Google reviews, listed on Google as “Telecommunications service provider”.
Based on 8 of 9 factors; recency not yet collected.
#7 Boost Mobile
Based in Aurora, 6 mi away
62/100IFR ScoreRanked #7 because of its Google rating and service focus: 3.8★ from 106 Google reviews, listed on Google as “Telecommunications service provider”.
Based on 8 of 9 factors; recency not yet collected.
Based in Denver
60/100IFR ScoreRanked #8 because of its Google rating and service focus: 5.0★ from 11 Google reviews, listed on Google as “Telecommunications service provider”.
Based on 8 of 9 factors; recency not yet collected.
Based in Arvada, 6 mi away
60/100IFR ScoreRanked #9 because of its Google rating and service focus: 4.8★ from 22 Google reviews, listed on Google as “Telecommunications service provider”.
Based on 8 of 9 factors; recency not yet collected.
Based in Westminster, 12 mi away
60/100IFR ScoreRanked #10 because of its Google rating and service focus: 5.0★ from 37 Google reviews, listed on Google as “Telecommunications service provider”.
Based on 8 of 9 factors; recency not yet collected.
Based in Denver
60/100IFR ScoreRanked #11 because of its Google rating and service focus: 4.7★ from 15 Google reviews, listed on Google as “Telecommunications service provider”.
Based on 8 of 9 factors; recency not yet collected.
#12 Total Wireless
Based in Commerce City, 6 mi away
60/100IFR ScoreRanked #12 because of its Google rating and review volume: 5.0★ from 180 Google reviews.
Based on 8 of 9 factors; recency not yet collected.
#13 Total Wireless
Based in Englewood, 6 mi away
60/100IFR ScoreRanked #13 because of its Google rating and review volume: 5.0★ from 176 Google reviews.
Based on 8 of 9 factors; recency not yet collected.
Based in Denver
59/100IFR ScoreRanked #14 because of its Google rating and service focus: 5.0★ from 8 Google reviews, listed on Google as “Telecommunications service provider”.
Based on 8 of 9 factors; recency not yet collected.
#15 CableEx
Based in Denver
59/100IFR ScoreRanked #15 because of its Google rating and service focus: 4.7★ from 24 Google reviews, listed on Google as “Telecommunications contractor”.
Based on 8 of 9 factors; recency not yet collected.
Based in Denver
59/100IFR ScoreRanked #16 because of its Google rating and service focus: 4.7★ from 19 Google reviews, listed on Google as “Telecommunications service provider”.
Based on 7 of 9 factors; recency and availability not yet collected.
#17 Total Wireless
Based in Aurora, 6 mi away
59/100IFR ScoreRanked #17 because of its Google rating and review volume: 4.9★ from 187 Google reviews.
Based on 8 of 9 factors; recency not yet collected.
#18 Total Wireless
Based in Denver
59/100IFR ScoreRanked #18 because of its Google rating and service focus: 5.0★ from 12 Google reviews, listed on Google as “Telecommunications service provider”.
Based on 8 of 9 factors; recency not yet collected.
#19 Total Wireless
Based in Lakewood, 5 mi away
58/100IFR ScoreRanked #19 because of its Google rating and review volume: 4.8★ from 161 Google reviews.
Based on 8 of 9 factors; recency not yet collected.
Based in Littleton, 16 mi away
58/100IFR ScoreRanked #20 because of its Google rating and service focus: 4.9★ from 43 Google reviews, listed on Google as “Telecommunications contractor”.
Based on 8 of 9 factors; recency not yet collected.
Based in Westminster, 9 mi away
58/100IFR ScoreRanked #21 because of its Google rating and service focus: 5.0★ from 30 Google reviews, listed on Google as “Telecommunications service provider”.
Based on 8 of 9 factors; recency not yet collected.
#22 VirsaTel
Based in Denver
58/100IFR ScoreRanked #22 because of its Google rating and service focus: 5.0★ from 23 Google reviews, listed on Google as “Telecommunications service provider”.
Based on 8 of 9 factors; recency not yet collected.
#23 NerdPhone
Based in Lakewood, 10 mi away
58/100IFR ScoreRanked #23 because of its Google rating and service focus: 5.0★ from 32 Google reviews, listed on Google as “Telecommunications service provider”.
Based on 8 of 9 factors; recency not yet collected.
Based in Aurora, 11 mi away
58/100IFR ScoreRanked #24 because of its Google rating and service focus: 4.8★ from 16 Google reviews, listed on Google as “Telecommunications contractor”.
Based on 7 of 9 factors; recency and availability not yet collected.
Based in Denver
58/100IFR ScoreRanked #25 because of its Google rating and service focus: 3.2★ from 6 Google reviews, listed on Google as “Telecommunications contractor”.
Based on 8 of 9 factors; recency not yet collected.
Business phone system providers 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 106 ranked business phone system providers here; the rest are on their profiles.
| Rank | Business | IFR Score | Google rating | Distance |
|---|---|---|---|---|
| 26 | Total Wireless | 58 | 5.0★ (9) | 8 mi |
| 27 | Avaya | 57 | 4.0★ (23) | 12 mi |
| 28 | System Communications | 57 | 5.0★ (23) | 10 mi |
| 29 | Maxi Cabling Communications LLC | 57 | 5.0★ (9) | In Denver |
| 30 | Liberty Global | 57 | 4.8★ (5) | In Denver |
| 31 | Altitude Network Solutions LLC | 56 | 5.0★ (6) | 9 mi |
| 32 | Vig corporation | 56 | 5.0★ (23) | 19 mi |
| 33 | Express Wireless - phone repair shop | 56 | 4.8★ (80) | 7 mi |
| 34 | Smart-Tel Communications | 56 | 4.1★ (9) | 7 mi |
| 35 | Logic Integration | 55 | 4.9★ (191) | 13 mi |
| 36 | LINX - Corporate Headquarters | 55 | 3.4★ (23) | In Denver |
| 37 | Avalon Communication Services | 55 | 3.8★ (20) | 6 mi |
| 38 | Sage Telecommunications Corporation | 55 | 3.3★ (17) | In Denver |
| 39 | ALLO Fiber | 55 | 4.8★ (50) | 49 mi |
| 40 | ADL Call Center | 55 | 3.7★ (3) | In Denver |
| 41 | Broadband Integrators | 55 | 1.0★ (7) | 14 mi |
| 42 | Piper Communication Services Inc | 55 | 4.1★ (9) | In Denver |
| 43 | Level 3 Communications | 55 | 3.7★ (7) | 10 mi |
| 44 | High Country Workplace Technologies | 55 | 4.4★ (12) | 9 mi |
| 45 | Backbone Cabling LLC | 54 | 5.0★ (32) | 46 mi |
| 46 | YipTel Colorado | 54 | 4.5★ (8) | In Denver |
| 47 | Total Wireless | 54 | 4.9★ (78) | 24 mi |
| 48 | Jennings AV, LLC | 54 | 4.8★ (74) | 9 mi |
| 49 | RingCentral - Denver | 54 | 2.8★ (151) | 13 mi |
| 50 | Zs Tech Solutions LLC | 54 | 5.0★ (12) | 35 mi |
Also serving Denver
20 more business phone system providers within 50 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 |
|---|---|---|
| Analytics Computers | 4.4★ (38) | In Denver |
| BCT Consulting - IT Support Denver | 5.0★ (6) | In Denver |
| Business Network Consulting | 5.0★ (17) | In Denver |
| Catalyst Security Group Inc | 4.9★ (62) | In Denver |
| CodeBlue Computing | 5.0★ (12) | In Denver |
| Denver iPhone & Computer Repair | 5.0★ (424) | In Denver |
| eCreek IT Solutions | 4.9★ (82) | In Denver |
| Forensic Discovery - Digital Forensics, Investigations & eDiscovery Vendor | 5.0★ (48) | In Denver |
| GrahamGolden Technologies | 4.1★ (9) | In Denver |
| Infusion Technologies LLC | 5.0★ (11) | In Denver |
| Istonish - Denver Managed IT Services Company | 3.9★ (13) | In Denver |
| ITGuys - Denver Managed IT Services Company | 4.8★ (45) | In Denver |
| LoDo IT | 4.8★ (16) | In Denver |
| Netirio - Denver Managed IT Services Company | 5.0★ (14) | In Denver |
| PCG Systems | 5.0★ (90) | In Denver |
| Redbot Security | 4.9★ (17) | In Denver |
| Resilient Manage Computer Services | 4.9★ (15) | In Denver |
| SimpleFly Tech | 5.0★ (21) | In Denver |
| Skymount Technology | 5.0★ (11) | In Denver |
| Tech Inc. | 4.6★ (11) | In Denver |
How we ranked Denver business phone system providers
We scored 106 Denver business phone system providers 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 Denver 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 business phone system provider
- Ask whether the system is cloud-hosted or installed on site, and who maintains it.
- Check internet capacity and backup: a cloud phone system stops when your connection does.
- Ask how 911 locations are registered for each phone and for remote staff.
- Compare per-user prices on the same features (call recording, queues, integrations).
- 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 business phone system provider
- Is the price per user, and which features are extra?
- Will you port our existing numbers, and how long does it take?
- What happens to calls if our internet connection goes down?
- How are 911 locations set up for office and remote staff?
- Who do we call for support, and during which hours?
- What is the contract length, and are phones bought or leased?
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.
Business phone system providers in Denver: frequently asked questions
Who is the best business phone system provider in Denver?
By IFR Score, the highest-ranked business phone system provider in Denver, CO is Total Wireless with an IFR Score of 69/100. It has 4.9★ from 321 Google reviews. It is open 7 days a week. Total Wireless (#2) and Boost Mobile (#3) follow. We ranked 106 business phone system providers on nine factors, last updated November 9, 2026.
How many business phone system providers are there in Denver?
ITFirmsRanked ranks 106 business phone system providers serving Denver, CO. 15 of them are based in Denver; the rest serve it from nearby towns. Another 20 within 50 mi are listed but not ranked yet. Counts are as of November 2026.
Which business phone system providers in Denver work on weekends?
39 of 106 ranked business phone system providers post Saturday hours and 28 post Sunday hours. The highest-ranked open Saturdays are Total Wireless (#1), Total Wireless (#2) and Boost Mobile (#3). Posted hours are office hours; many firms also run an after-hours support line for contract clients.
What Google rating do Denver business phone system providers have?
The median Google rating among 106 rated business phone system providers in Denver is 4.8★, with a median of 11 reviews. Total Wireless has the most, 321 reviews, and ranks #1. We adjust ratings for review count, so a few five-star reviews cannot top the list.
How does ITFirmsRanked rank business phone system providers?
Each business phone system provider 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 business phone system providers outside Denver count in this ranking?
Yes, if they are within 50 mi of the Denver city center, our service radius for business phone system providers. 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 business phone system providers 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 business phone system provider do?
Business phone system providers set up and support office phone systems, mostly cloud VoIP today: numbers, desk phones, call routing, voicemail and contact-centre features.
How are business phone system providers in Denver ranked?
By IFR Score: Google rating and review volume, recent reviews, opening hours, how clearly the firm does business phone systems and VoIP, distance, a claimed profile, our badge and verified client reviews. Sponsored placements never change the order.
Can we keep our phone numbers if we switch providers?
In most cases yes: numbers can be ported to a new provider in the US and Canada. Keep your current service active until the port is complete, and ask the new provider to manage the port request.
What about 911 calls on a VoIP system?
Each phone needs a registered location so 911 calls go to the right place. In the US, multi-line systems must support direct 911 dialling and send dispatchable location information under federal rules (Kari’s Law and RAY BAUM’S Act). Ask the provider how they set this up.
Update log for Denver
- November 2026: IFR Scores recalculated for 106 business phone system providers serving Denver.
More business phone system providers and Denver pages
Business phone system providers near Denver
- Business phone system providers in Berkley, CO109 ranked
- Business phone system providers in Wheat Ridge, CO106 ranked
- Business phone system providers in Commerce City, CO109 ranked
- Business phone system providers in Lakewood, CO100 ranked
- Business phone system providers in Englewood, CO99 ranked
- Business phone system providers in Sherrelwood, CO109 ranked
- Business phone system providers in Welby, CO109 ranked
- Business phone system providers in Arvada, CO113 ranked
- Business phone system providers in Westminster, CO109 ranked
- Business phone system providers in Federal Heights, CO109 ranked
Other services in Denver
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- Cybersecurity companies in Denver184 ranked
- IT consultants in Denver213 ranked
- Network cabling and installation companies in Denver120 ranked
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- All IT providers in Denver