Simwood
Bristol carrier that runs its own voice network and gives trunk customers portal and API control
Quick Overview
| Company | Simwood eSMS Limited |
|---|---|
| Category | SIP Trunking and Virtual Number Providers |
| Headquarters | Bristol, United Kingdom |
| Founded | 1996 |
| EU Presence | Yes - United Kingdom (UK) |
| Data Location | Not stated on the pages checked |
| Open Source | No |
| GDPR Compliant | Yes |
| Self-Hosting | No |
| Main Features | Hosted SIP trunks, ring timeouts, time-of-day routing, failover and forwarding, portal and API control, numbers and porting, wholesale SMS, hosted PBX |
| Pricing | Rates page on website; no trunk prices on the hosted trunk page |
| Best For | Teams that want to manage trunks through an API on a carrier-owned network |
| Replaces | Telnyx, Twilio Elastic SIP Trunking |
Detailed Review
Simwood describes itself as a software-defined carrier and says the network behind its trunks was designed for voice rather than adapted for it. The company is registered in England under number 03379831 and lists Bristol as its base.
The hosted trunk page is short on specifications but long on a point of view: it argues that call glitches usually come from the carrier network rather than from the customer's internet line, and that owning the network removes the finger-pointing.
What a trunk includes
Each hosted SIP trunk comes with ring timeouts, time-of-day routing, failover options and call forwarding, all adjustable through the portal or the API. That puts Simwood nearer to Telnyx in spirit than the German providers on this list, which lean on fixed plans.
The trunk is aimed at buyers who keep an on-premise PBX and are not ready to move to a hosted one. For those who do want to move, the same company sells a hosted PBX, so the switch does not require a new supplier.
Network and certification claims
Simwood states that it owns and operates its network and that the footer of every page carries ISO 27001 and ISO 9001 marks. Those are the company's own statements and an auditor's certificate would be the right document to request in a procurement round.
The wider site also lists numbers and porting, wholesale SMS, WhatsApp Business, Microsoft Teams connectivity and fraud protection, so trunks are one part of a carrier catalogue.
Group structure to check before signing
The page footer lists the UK limited company first, followed by a Simwood Inc address in Tennessee and an office in Tbilisi. The privacy policy names Simwood eSMS Limited and its sister company Sipcentric Limited as the controller entities.
A buyer should confirm in the order form that the UK company is the contracting party, since the group has presences outside the UK.
Limitations to Consider
The hosted trunk page gives no prices, channel limits or codec list, so a quote is needed before comparing it with easybell or DIDWW. The group footer includes a US subsidiary address, which makes the contracting entity worth confirming. Data location was not stated on the pages checked.
Who Should Use Simwood
UK and European businesses with an on-premise PBX or a developer team that wants to script trunk behaviour through an API against a carrier that owns its network.
Pros and Cons
Pros
- Carrier states it owns and operates its network
- Portal and API control of trunks
- Ring timeouts, time-of-day routing and failover included
- Hosted PBX available from the same company
- ISO 27001 and ISO 9001 marks shown on its site
Cons
- No prices on the hosted trunk page
- US and Georgian group entities appear in the footer
- Data location not stated on pages checked
- Documentation depth not assessed beyond the public pages
Alternatives to Simwood
Other European sip trunking and virtual number providers worth comparing before you decide:
DIDWW
Ireland · Dublin-contracted wholesale supplier of SIP trunks and numbers with published per-minute rates
easybell
Germany · Berlin provider with trunk plans from two to 1,000 channels and no minimum term
sipgate
Germany · Duesseldorf provider connecting Asterisk, 3CX or Starface systems to the German network
Gradwell
United Kingdom · Bath-based trunk supplier with 3CX preferred status and Teams Direct Routing
See all European sip trunking and virtual number providers or compare them directly against Telnyx on our alternatives page.
Frequently Asked Questions
Ring timeouts, time-of-day routing, failover options and forwarding, with full control via the portal and the API, according to the hosted trunk page.
The contracting company shown in its footer is Simwood eSMS Limited, registered in England with number 03379831 and based in Bristol. The footer also lists a US subsidiary and a Tbilisi office.
Not on the hosted trunk page. The site has a rates section under its carrier services, and a quote is the safer route for a comparison.