Best SIP Trunking Providers in 2026
Updated
In short: Bandwidth Messaging API is ranked #1 of 30 as of 7 October 2026, ahead of Telnyx Text-to-Speech API and Telnyx SIP Trunking. The best-ranked option with a free plan is Telnyx Text-to-Speech API. The lowest first paid tier on this page is SIP.US Cloud SIP Trunking at $1/mo.
If you’re comparing SIP trunking providers for a communications setup, the entries include Telnyx Text-to-Speech API, IPComms SIP Trunking and Bandwidth Messaging API. Look at concurrent channels and emergency calling alongside number porting and toll-free number support to compare the listed service dimensions. Encrypted signaling and pricing model add further points to consider, while free-plan availability and the paid starting price help frame cost. The entries are ranked best-of options; use these fields to assess fit with your call volumes, number requirements and budget.
30 SIP trunking providers ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
SIP Trunking Providers, one module each. A lit port is something its maker publishes; 12 of the 25 on this page have a public API.
- 01 Bandwidth Messaging API API yesOSS not on recordFREE yesDOCS 7.4
- 02 Telnyx Text-to-Speech API API yesOSS not on recordFREE yesDOCS 7.3$500/mo
- 03 Telnyx SIP Trunking API yesOSS not on recordFREE yesDOCS 7.2$500/mo
- 04 Sinch Fax API API yesOSS not on recordFREE not on recordDOCS 6.9
- 05 Callivex SIP Trunking API yesOSS not on recordFREE not on recordDOCS 6.8
- 06 IPComms SIP Trunking API yesOSS not on recordFREE not on recordDOCS 6.8
- 07 SIP.US Cloud SIP Trunking API yesOSS not on recordFREE not on recordDOCS 6.8$1/mo
- 08 DIDWW Two-way SIP Trunking API yesOSS not on recordFREE not on recordDOCS 6.7
- 09 Dollu CCaaS API yesOSS not on recordFREE not on recordDOCS 6.7
- 10 Orange Business Talk IP API yesOSS not on recordFREE not on recordDOCS 6.7
- 11 Skyetel SIP Trunking API yesOSS not on recordFREE not on recordDOCS 6.7$25/mo
- 12 Flowroute API yesOSS not on recordFREE not on recordDOCS 6.6
- 13 Twilio Segment API not on recordOSS not on recordFREE yesDOCS 5.9$120/mo
- 14 Callcentric SIP Trunking API not on recordOSS not on recordFREE yesDOCS 5.8Free
- 15 BT Global SIP API not on recordOSS not on recordFREE not on recordDOCS 5.4
- 16 Colt SIP Trunking API not on recordOSS not on recordFREE not on recordDOCS 5.4
- 17 VoIP.ms SIP Trunking API not on recordOSS not on recordFREE not on recordDOCS 5.3$23/mo
- 18 BICS SIP Trunking API not on recordOSS not on recordFREE not on recordDOCS 5.2
- 19 Frontier SIP Trunking API not on recordOSS not on recordFREE not on recordDOCS 5.2
- 20 SendFax.to API not on recordOSS not on recordFREE not on recordDOCS 5.2
- 21 Anveo Direct API not on recordOSS not on recordFREE not on recordDOCS 5.1
- 22 AT&T IP Flexible Reach API not on recordOSS not on recordFREE not on recordDOCS 5.1
- 23 Sangoma Carrier Voice API not on recordOSS not on recordFREE not on recordDOCS 5.1
- 24 Virgin Media Business SIP Trunking API not on recordOSS not on recordFREE not on recordDOCS 5.1
- 25 AVOXI Global SIP Trunking API not on recordOSS not on recordFREE not on recordDOCS 5.0
Compare all 25 in a table
| # | Platform | Score | Free plan | From | Free plan | Paid from | Pricing model | Concurrent channels |
|---|---|---|---|---|---|---|---|---|
| 1 | Bandwidth Messaging API | 7.4 | No | — | No | — | — | — |
| 2 | Telnyx Text-to-Speech API | 7.3 | Free plan | $500/mo | No | — | — | — |
| 3 | Telnyx SIP Trunking | 7.2 | Free plan | $500/mo | No | — | — | — |
| 4 | Sinch Fax API | 6.9 | No | — | No | — | hybrid | — |
| 5 | Callivex SIP Trunking | 6.8 | No | — | — | — | — | — |
| 6 | IPComms SIP Trunking | 6.8 | No | — | Yes | 1.5 /mo | hybrid | — |
| 7 | SIP.US Cloud SIP Trunking | 6.8 | No | $1/mo | No | — | hybrid | — |
| 8 | DIDWW Two-way SIP Trunking | 6.7 | No | — | — | — | hybrid | — |
| 9 | Dollu CCaaS | 6.7 | No | — | No | — | hybrid | — |
| 10 | Orange Business Talk IP | 6.7 | No | — | — | — | hybrid | — |
| 11 | Skyetel SIP Trunking | 6.7 | No | $25/mo | — | 25 /mo | hybrid | — |
| 12 | Flowroute | 6.6 | No | — | No | — | hybrid | — |
| 13 | Twilio Segment | 5.9 | Free plan | $120/mo | No | — | hybrid | — |
| 14 | Callcentric SIP Trunking | 5.8 | Free plan | Free | Yes | — | per-minute | 3 channels |
| 15 | BT Global SIP | 5.4 | No | — | — | — | hybrid | — |
| 16 | Colt SIP Trunking | 5.4 | No | — | — | — | hybrid | — |
| 17 | VoIP.ms SIP Trunking | 5.3 | No | $23/mo | No | — | hybrid | — |
| 18 | BICS SIP Trunking | 5.2 | No | — | — | — | hybrid | — |
| 19 | Frontier SIP Trunking | 5.2 | No | — | — | — | — | — |
| 20 | SendFax.to | 5.2 | No | — | No | 17.99 /mo | hybrid | 1 channels |
| 21 | Anveo Direct | 5.1 | No | — | — | 0.15 /mo | hybrid | 0 channels |
| 22 | AT&T IP Flexible Reach | 5.1 | No | — | — | — | hybrid | 6 channels |
| 23 | Sangoma Carrier Voice | 5.1 | No | — | — | — | per-minute | — |
| 24 | Virgin Media Business SIP Trunking | 5.1 | No | — | — | — | hybrid | — |
| 25 | AVOXI Global SIP Trunking | 5.0 | No | — | No | — | hybrid | — |
Is your platform on this list?
Numbered spots on this list can be sponsored, and a sponsored row is labelled as paid.
Questions about this list
Which SIP trunking provider is ranked first on Inferse?
Bandwidth Messaging API is ranked #1 of 30 with a score of 7.4. Telnyx Text-to-Speech API is second and Telnyx SIP Trunking third.
How many of these have a free plan?
4 of the 25 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, SIP.US Cloud SIP Trunking has the lowest first paid tier we found: $1/mo.
How is this list ranked?
Ranked on what each maker publishes, open and connectable first: a public API, open-source code, the depth of its documentation and a free tier to try it on. Model lists are sorted by the figure in their title, exactly as each provider publishes it.