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Best O2 Business SIP Trunking Alternatives in 2026

Updated

20 platforms from SIP trunking providers ranked against O2 Business SIP Trunking on the same published basis.

  1. 1
    Twilio Segment Free plan WebiOSAndroid $120/mo7.8
    O2 Business SIP Trunking vs Twilio Segment
  2. 2
    Bandwidth Messaging API Free trial apiWeb 7.7
    O2 Business SIP Trunking vs Bandwidth Messaging API
  3. 3
    Callcentric SIP Trunking Free plan AndroidextensioniOSLinuxMac Free7.2
    O2 Business SIP Trunking vs Callcentric SIP Trunking
  4. 4
    BulkVS SIP Trunking apiWeb $0.01/mo7.1
    O2 Business SIP Trunking vs BulkVS SIP Trunking
  5. 5
    SIP.US Cloud SIP Trunking Free trial AndroidapiiOSWeb $1/mo7.0
    O2 Business SIP Trunking vs SIP.US Cloud SIP Trunking
  6. 6
    Telnyx Text-to-Speech API Free plan apiWeb $500/mo7.0
    O2 Business SIP Trunking vs Telnyx Text-to-Speech API
  7. 7
    Anveo Direct api 6.9
    O2 Business SIP Trunking vs Anveo Direct
  8. 8
    IPComms SIP Trunking Free trial apiWeb 6.8
    O2 Business SIP Trunking vs IPComms SIP Trunking
  9. 9
    Telnyx SIP Trunking Free plan apiWeb $500/mo6.8
    O2 Business SIP Trunking vs Telnyx SIP Trunking
  10. 10
    Sangoma Carrier Voice AndroidapiiOSWeb 6.6
    O2 Business SIP Trunking vs Sangoma Carrier Voice
  11. 11
    SendFax.to AndroidapiiOSWeb 6.3
    O2 Business SIP Trunking vs SendFax.to
  12. 12
    Sinch Fax API apiWeb 6.3
    O2 Business SIP Trunking vs Sinch Fax API
  13. 13
    AT&T IP Flexible Reach Web 6.2
    O2 Business SIP Trunking vs AT&T IP Flexible Reach
  14. 14
    BT Global SIP Web 6.2
    O2 Business SIP Trunking vs BT Global SIP
  15. 15
    Callivex SIP Trunking apiWeb 6.2
    O2 Business SIP Trunking vs Callivex SIP Trunking
  16. 16
    Colt SIP Trunking Web 6.2
    O2 Business SIP Trunking vs Colt SIP Trunking
  17. 17
    Gamma Horizon AndroidiOSWeb 6.2
    O2 Business SIP Trunking vs Gamma Horizon
  18. 18
    Virgin Media Business SIP Trunking Web 6.2
    O2 Business SIP Trunking vs Virgin Media Business SIP Trunking
  19. 19
    Dollu CCaaS apiWeb 6.1
    O2 Business SIP Trunking vs Dollu CCaaS
  20. 20
    Orange Business Talk IP apiWeb 6.1
    O2 Business SIP Trunking vs Orange Business Talk IP

O2 Business SIP Trunking alternatives compared

#PlatformScoreFree planFromRuns on
1Twilio Segment7.8Free plan$120/moWeb, iOS, Android
2Bandwidth Messaging API7.7API, Web
3Callcentric SIP Trunking7.2Free planFreeAndroid, Browser, iOS, Linux, Mac, self-hosted, Web, Windows
4BulkVS SIP Trunking7.1$0.01/moAPI, Web
5SIP.US Cloud SIP Trunking7.0No$1/moAndroid, API, iOS, Web
6Telnyx Text-to-Speech API7.0Free plan$500/moAPI, Web
7Anveo Direct6.9API
8IPComms SIP Trunking6.8API, Web
9Telnyx SIP Trunking6.8Free plan$500/moAPI, Web
10Sangoma Carrier Voice6.6Android, API, iOS, Web
11SendFax.to6.3NoAndroid, API, iOS, Web
12Sinch Fax API6.3API, Web
13AT&T IP Flexible Reach6.2Web
14BT Global SIP6.2Web
15Callivex SIP Trunking6.2API, Web
16Colt SIP Trunking6.2Web
17Gamma Horizon6.2Android, iOS, Web
18Virgin Media Business SIP Trunking6.2Web
19Dollu CCaaS6.1API, Web
20Orange Business Talk IP6.1API, Web
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Questions about O2 Business SIP Trunking alternatives

What is the best alternative to O2 Business SIP Trunking?

Twilio Segment, number 1 in SIP trunking providers with a score of 7.8 out of 10. The others here: Bandwidth Messaging API, Callcentric SIP Trunking, BulkVS SIP Trunking and 16 more.

What is the best free alternative to O2 Business SIP Trunking?

Twilio Segment is the best-ranked alternative with a free plan. 4 of the 20 alternatives here publish a free plan on their own pricing pages.

How are these alternatives ranked?

Ranked on how quickly a newcomer can get going: documentation depth, a free tier or trial, and the platforms it runs on.