61/100IFR Score
Ranked #1 because of its Google rating and service focus: 5.0★ from 95 Google reviews, listed on Google as “Telecommunications service provider”.
Based on 8 of 9 factors; recency not yet collected.
Best Business Phone System Providers in Union, MO (2026)
44 business phone system providers ranked by IFR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Union: Cadence Technology Services, IFR Score 61/100; 5.0★ from 95 Google reviews.
- 13
Most-reviewed: i3 Broadband, 236 Google reviews at 4.1★, the most of 44 ranked; ranked #13.
Rankings can't be bought. IT providers can't pay to change their rank or score. How we rank
44 Union business phone system providers are ranked here by IFR Score, from nine published factors. 9 open Saturdays and 6 open Sundays, based on posted hours. The median Google rating is 4.8★ across 44 rated IT firms.
Top 10 business phone system providers in Union 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 | Cadence Technology Services | 61 | 5.0★ (95) | Town and Country, 29 mi away | — | Overall |
| 2 | Boost Mobile | 58 | 3.8★ (73) | Bridgeton, 38 mi away | Sat · Sun · Evenings | — |
| 3 | TSI Global Companies | 58 | 4.9★ (61) | Saint Charles, 37 mi away | — | — |
| 4 | Mastor | 57 | 4.8★ (50) | Maryland Heights, 35 mi away | — | — |
| 5 | Boost Mobile | 57 | 4.0★ (48) | St. Louis, 45 mi away | Sat · Sun · Evenings | — |
| 6 | iTSTL | 56 | 5.0★ (29) | Arnold, 30 mi away | — | — |
| 7 | Lumen | 56 | 3.5★ (36) | Town and Country, 30 mi away | — | — |
| 8 | Viridian, Inc. | 55 | 5.0★ (18) | Overland, 39 mi away | Sat | — |
| 9 | Tech Electronics of St. Louis | 55 | 4.5★ (41) | St. Louis, 40 mi away | — | — |
| 10 | Snapcom | 55 | 4.3★ (28) | St. Louis, 32 mi away | — | — |
The 44 best business phone system providers in Union, 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.
#2 Boost Mobile
Based in Bridgeton, 38 mi away
58/100IFR ScoreRanked #2 because of its Google rating and service focus: 3.8★ from 73 Google reviews, listed on Google as “Telecommunications service provider”.
Based on 8 of 9 factors; recency not yet collected.
Based in Saint Charles, 37 mi away
58/100IFR ScoreRanked #3 because of its Google rating and service focus: 4.9★ from 61 Google reviews, listed on Google as “Telecommunications service provider”.
Based on 8 of 9 factors; recency not yet collected.
#4 Mastor
Based in Maryland Heights, 35 mi away
57/100IFR ScoreRanked #4 because of its Google rating and service focus: 4.8★ from 50 Google reviews, listed on Google as “Telecommunications service provider”.
Based on 8 of 9 factors; recency not yet collected.
#5 Boost Mobile
Based in St. Louis, 45 mi away
57/100IFR ScoreRanked #5 because of its Google rating and service focus: 4.0★ from 48 Google reviews, listed on Google as “Telecommunications service provider”.
Based on 8 of 9 factors; recency not yet collected.
#6 iTSTL
Based in Arnold, 30 mi away
56/100IFR ScoreRanked #6 because of its Google rating and service focus: 5.0★ from 29 Google reviews, listed on Google as “Telecommunications service provider”.
Based on 8 of 9 factors; recency not yet collected.
#7 Lumen
Based in Town and Country, 30 mi away
56/100IFR ScoreRanked #7 because of its Google rating and service focus: 3.5★ from 36 Google reviews, listed on Google as “Telecommunications service provider”.
Based on 7 of 9 factors; recency and availability not yet collected.
Based in Overland, 39 mi away
55/100IFR ScoreRanked #8 because of its Google rating and service focus: 5.0★ from 18 Google reviews, listed on Google as “Telecommunications service provider”.
Based on 8 of 9 factors; recency not yet collected.
Based in St. Louis, 40 mi away
55/100IFR ScoreRanked #9 because of its Google rating and service focus: 4.5★ from 41 Google reviews, listed on Google as “Telecommunications service provider”.
Based on 8 of 9 factors; recency not yet collected.
#10 Snapcom
Based in St. Louis, 32 mi away
55/100IFR ScoreRanked #10 because of its Google rating and service focus: 4.3★ from 28 Google reviews, listed on Google as “Telecommunications service provider”.
Based on 8 of 9 factors; recency not yet collected.
Based in Town and Country, 31 mi away
54/100IFR ScoreRanked #11 because of its Google rating and service focus: 4.1★ from 32 Google reviews, listed on Google as “Telecommunications service provider”.
Based on 8 of 9 factors; recency not yet collected.
Based in Saint Peters, 33 mi away
54/100IFR ScoreRanked #12 because of its Google rating and review volume: 4.9★ from 133 Google reviews.
Based on 8 of 9 factors; recency not yet collected.
#13 i3 Broadband
Based in Saint Peters, 31 mi away
53/100IFR ScoreRanked #13 because of its Google rating and review volume: 4.1★ from 236 Google reviews, the most in Union.
Based on 7 of 9 factors; recency and availability not yet collected.
Based in Saint Charles, 33 mi away
53/100IFR ScoreRanked #14 because of its Google rating and service focus: 3.7★ from 9 Google reviews, listed on Google as “Telecommunications contractor”.
Based on 7 of 9 factors; recency and availability not yet collected.
Based in O'Fallon, 25 mi away
53/100IFR ScoreRanked #15 because of its Google rating and service focus: 3.8★ from 13 Google reviews, listed on Google as “Telecommunications contractor”.
Based on 8 of 9 factors; recency not yet collected.
Based in Maryland Heights, 35 mi away
52/100IFR ScoreRanked #16 because of its Google rating and service focus: 4.9★ from 11 Google reviews, listed on Google as “Telecommunications service provider”.
Based on 8 of 9 factors; recency not yet collected.
Based in St. Louis, 33 mi away
52/100IFR ScoreRanked #17 because of its Google rating and service focus: 5.0★ from 10 Google reviews, listed on Google as “Telecommunications service provider”.
Based on 8 of 9 factors; recency not yet collected.
#18 IntegriTel
Based in Saint Peters, 33 mi away
52/100IFR ScoreRanked #18 because of its Google rating and service focus: 5.0★ from 9 Google reviews, listed on Google as “Telecommunications service provider”.
Based on 8 of 9 factors; recency not yet collected.
Based in Chesterfield, 25 mi away
52/100IFR ScoreRanked #19 because of its Google rating and service focus: 5.0★ from 6 Google reviews, listed on Google as “Telecommunications contractor”.
Based on 8 of 9 factors; recency not yet collected.
Based in Chesterfield, 26 mi away
51/100IFR ScoreRanked #20 because of its Google rating and service focus: 3.9★ from 7 Google reviews, listed on Google as “Telecommunications service provider”.
Based on 8 of 9 factors; recency not yet collected.
Based in Chesterfield, 25 mi away
51/100IFR ScoreRanked #21 because of its Google rating and service focus: 4.0★ from 6 Google reviews, listed on Google as “Telecommunications service provider”.
Based on 8 of 9 factors; recency not yet collected.
#22 Total Wireless
Based in St. Louis, 45 mi away
51/100IFR ScoreRanked #22 because of its Google rating and service focus: 5.0★ from 3 Google reviews, listed on Google as “Telecommunications service provider”.
Based on 8 of 9 factors; recency not yet collected.
Based in Chesterfield, 27 mi away
50/100IFR ScoreRanked #23 because of its Google rating and service focus: 5.0★ from 4 Google reviews, listed on Google as “Telecommunications service provider”.
Based on 8 of 9 factors; recency not yet collected.
Based in Chesterfield, 26 mi away
50/100IFR ScoreRanked #24 because of its Google rating and service focus: 5.0★ from 4 Google reviews, listed on Google as “Telecommunications service provider”.
Based on 8 of 9 factors; recency not yet collected.
Based in Kirkwood, 34 mi away
50/100IFR ScoreRanked #25 because of its Google rating and service focus: 3.0★ from 9 Google reviews, listed on Google as “Telecommunications service provider”.
Based on 8 of 9 factors; recency not yet collected.
All 44 business phone system providers
#1 to #25 are shown in full above. Here are #26 to #44, in IFR Score order; each links to its profile.
| Rank | Business | IFR Score | Google rating | Distance |
|---|---|---|---|---|
| 26 | Essential Network Technologies | Missouri IT Support Company & Managed IT Services | 50 | 5.0★ (55) | 32 mi |
| 27 | Fast Communications | 50 | 4.9★ (33) | 29 mi |
| 28 | Metropark Communications Inc | 50 | 3.9★ (7) | 37 mi |
| 29 | NetCom, Inc. | 50 | 3.0★ (6) | 30 mi |
| 30 | Flare Communications LLC | 49 | 5.0★ (3) | 29 mi |
| 31 | Harrisonville Telephone Company | 49 | 3.1★ (10) | 47 mi |
| 32 | Business Centers of Missouri, INC | 48 | 4.3★ (11) | 33 mi |
| 33 | Warner Communications | 46 | 4.9★ (20) | 36 mi |
| 34 | GFI Digital | 45 | 4.8★ (19) | 35 mi |
| 35 | Total Wireless | 45 | 3.9★ (8) | 39 mi |
| 36 | Vitek Solutions Inc | 45 | 3.8★ (11) | 31 mi |
| 37 | Core Telecom Systems | 44 | 5.0★ (4) | 36 mi |
| 38 | Prep Security | 44 | 4.4★ (15) | 37 mi |
| 39 | Total Wireless | 44 | 5.0★ (6) | 49 mi |
| 40 | St. Charles IT Consultants | 42 | 5.0★ (4) | 29 mi |
| 41 | Callisto Communications LLC | 41 | 5.0★ (3) | 25 mi |
| 42 | ASAP Technology | 40 | 5.0★ (3) | 38 mi |
| 43 | WirelessUSA | 40 | 3.3★ (3) | 36 mi |
| 44 | Axis Telesolutions | 39 | 5.0★ (3) | 42 mi |
Also serving Union
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 |
|---|---|---|
| Access US | 3.0★ (2) | 46 mi |
| AllCom Global Services, Inc. | 3.0★ (2) | 24 mi |
| AQM Information Technology | 3.8★ (26) | In Union |
| Butler Communications | 3.0★ (1) | 28 mi |
| C & R Communications | 5.0★ (1) | 31 mi |
| Clarus Communications | 5.0★ (1) | 35 mi |
| Connell Communications | 5.0★ (1) | 36 mi |
| Fulton Communications | 5.0★ (1) | 25 mi |
| Innovative Technology Group | 5.0★ (1) | 37 mi |
| JIL Technology | 5.0★ (6) | In Union |
| Lingo Telecom, LLC | 1.0★ (1) | 28 mi |
| Master Communications | 5.0★ (1) | 24 mi |
| MTS Inc. | 5.0★ (1) | 25 mi |
| Netrality Data Centers - St. Louis Data Center - 900 Walnut - Colocation & Interconnection | 5.0★ (2) | 46 mi |
| Oteros Cable Llc | 3.0★ (2) | 44 mi |
| STR Technologies | 5.0★ (54) | In Union |
| StrategiCom Inc. | 5.0★ (1) | 27 mi |
| Stratosphere Networks | 5.0★ (1) | 26 mi |
| VoIPLINK | 1.5★ (2) | 35 mi |
| vUnity Business Internet | 1.0★ (1) | 46 mi |
How we ranked Union business phone system providers
We scored 44 Union 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 Union 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 Union: frequently asked questions
Who is the best business phone system provider in Union?
By IFR Score, the highest-ranked business phone system provider in Union, MO is Cadence Technology Services with an IFR Score of 61/100. It has 5.0★ from 95 Google reviews. Boost Mobile (#2) and TSI Global Companies (#3) follow. We ranked 44 business phone system providers on nine factors, last updated November 9, 2026.
How many business phone system providers are there in Union?
ITFirmsRanked ranks 44 business phone system providers serving Union, MO. Another 20 within 50 mi are listed but not ranked yet. Counts are as of November 2026.
Which business phone system providers in Union work on weekends?
9 of 44 ranked business phone system providers post Saturday hours and 6 post Sunday hours. The highest-ranked open Saturdays are Boost Mobile (#2), Boost Mobile (#5) and Viridian, Inc. (#8). Posted hours are office hours; many firms also run an after-hours support line for contract clients.
What Google rating do Union business phone system providers have?
The median Google rating among 44 rated business phone system providers in Union is 4.8★, with a median of 11 reviews. i3 Broadband has the most, 236 reviews, and ranks #13. 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 Union count in this ranking?
Yes, if they are within 50 mi of the Union 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 Union 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 Union
- November 2026: IFR Scores recalculated for 44 business phone system providers serving Union.
More business phone system providers and Union pages
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