Best VoIP With CRM Integration
Only the services that fit "voip with crm integration", tested with the same five-seat office and the same 40 calls.
Last Updated: Sep 2026Suggested business phone systems for you
NNextiva
Good
8.4
Support answered in under two minutes every time...Learn More
We Recommend
RRingCentral
Very Good
8.6
Highest blind call-quality score, including on t...Learn More
DDialpad
Good
8.3
Live transcript was accurate enough that our tes...Learn More
for crm
Voip business phone systemsVoip for small businessCheapest Business VoIP ServicesPhone system for call centersBusiness phone with text messagingVoip for solo entrepreneurs
1
RingCentral (Core) - The most complete business phone platform: best call quality in our test, a 99.999% uptime commitment and an integration for nearly everything Tested Aug 2026 by Team RankingRight
- Highest blind call-quality score, including on the calls we made during deliberate network load
- Auto-attendant and ring groups configured in under twenty minutes
- Integrations with Salesforce, HubSpot, Microsoft 365, Google and Slack
Very Good
8.6
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$20 · checked Sep 11
20 USD/user/mo
100 USD/mo
2
Nextiva (Digital / Core) - Near-RingCentral call quality with the best support in the test — a real person, quickly, who fixed our porting problem in one call Tested Aug 2026 by Team RankingRight
- Support answered in under two minutes every time and resolved a stuck number port same-day
- Call quality within a tenth of RingCentral
- Built-in CRM and helpdesk features on higher tiers
Good
8.4
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$20 · checked Sep 11
20 USD/user/mo
100 USD/mo
3
Dialpad (Standard) - Live transcription that is accurate enough to read instead of listening, with real-time coaching prompts for sales and support calls Tested Aug 2026 by Team RankingRight
- Live transcript was accurate enough that our testers stopped taking notes
- Real-time coaching cards surface answers during a call
- Sentiment analysis and automatic call summaries included on Standard
Good
8.3
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$15 · checked Sep 11
15 USD/user/mo
75 USD/mo
4
8x8 Work (X2) - Unlimited calling to 14 countries on the entry plan and a serious contact-centre platform above it — the pick when the phone bill crosses borders Tested Aug 2026 by Team RankingRight
- Unlimited calling to 14 countries at the entry tier — nothing else here comes close
- Call recording included on X2 rather than upsold
- Strong call quality on our international test calls
Fair
7.8
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$24 · checked Sep 11
24 USD/user/mo
120 USD/mo
Frequently asked questions about business phone systems
What internet speed does VoIP need?
About 100 kbps up and down per simultaneous call, so even five concurrent calls need only around half a megabit. Speed is rarely the problem; jitter and buffering are. Put voice traffic on a QoS rule or a separate VLAN and the quality problems most offices blame on their provider disappear. Our test connection was a shared 100 Mbps line with no QoS, which is why the scores spread as they did.
Can I keep my existing number?
Yes. Porting is a legal right in the US and every provider here does it free. It took three to eleven business days in our test. Never cancel the old service before the port completes, or the number can be released and lost.
Why is my bill higher than the advertised price?
Federal Universal Service Fund contributions, E911 fees, state and local taxes and provider "regulatory recovery" charges are added on top, typically 10 to 20 percent. RingCentral and Vonage added the most in our quotes; Ooma and Google Voice the least. Ask for a full quote with fees before signing.
How do you test business phone systems?
Five seats run for two weeks on one 100 Mbps connection with no prioritisation. We record 40 calls per system — landline, mobile and VoIP-to-VoIP, some during deliberate network load — and score them blind for clarity, delay and dropouts. We port a real number, build the same auto-attendant and ring group, test voicemail transcription against the recording, and price the plan the setup required.
*Scores: Call quality & reliability 30 · Features 25 · Setup & admin 15 · Integrations 10 · Value 20; score = Σ ÷ 10, ties break on the earlier test date. Prices shown were checked on the date beside each and may change. Affiliate links are added only after a score is locked and can never change it. How we rank.
#1 RingCentral8.6 · $20
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