Simwood API
Simwood API: Carrier-side APIs for number operations, routing, records, messaging and voice services. Ranked #23 of 53 in Voice APIs by our editors (7.2/10); pricing: Pricing on request; best for operators needing number provisioning and carrier-side tools.
At a glance
- Editor score7.2 / 10
- PricingPricing on request
- Best forOperators needing number provisioning and carrier-side tools
- Inbound callingYes
- Founded1996 · Bristol, United Kingdom
- Facts checked23 Sep 2026
Where it wins
- Provision UK and US numbers and automate porting through the API.
- Configure call routing and retrieve voice call-detail records.
- Store carrier-side call recordings in customer-controlled S3-compatible storage.
Where it doesn't
- Carrier Services rates require contacting sales.
- Wholesale API v3 is feature-frozen, though it remains supported.
- Its listed capabilities focus on carrier services rather than programmable call control.
Our verdict on Simwood API
Simwood API is a hosted gateway to carrier communications services, aimed at operators that need number provisioning and carrier-side tools. Through the API, customers can provision UK and US telephone numbers, automate porting, configure call routing, retrieve voice call-detail records, and send A2P SMS with SMPP support. Inbound and outbound calling, phone numbers, SIP support and call recording are included among its category capabilities. The product is cloud-deployed and uses bearer-token authentication with scoped keys.
The service spans number operations, voice records, messaging and additional voice features. Simwood documents a Conversational AI voice-agent service and Conversation Intelligence signals and webhooks. Carrier-side recording sends recordings to customer-controlled S3-compatible storage, which may suit teams that want recording storage in their own compatible destination. A unified api.simwood.com gateway groups independently versioned services. The older Wholesale API v3 remains supported, but is feature-frozen as newer versioned services are introduced; teams planning new work should account for that distinction. Documentation and ticket support are listed as support channels.
Pricing is handled through sales rather than publicly itemized Carrier Services rates, so buyers should expect a sales conversation to understand costs. Simwood was founded in 1996, is headquartered in Bristol, United Kingdom, and lists ISO 27001 compliance. Choose Simwood API when carrier-facing number provisioning, porting, routing, CDR retrieval or recording is central to the requirement. Teams primarily seeking detailed programmable call-control capabilities should compare alternatives, since the published product description emphasizes carrier services and provides less detail on that area.
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Simwood API pricing
Simwood API fact sheet
| Free plan | Not verified |
|---|---|
| Paid from | Not verified |
| Inbound calling | Yes |
| Outbound calling | Yes |
| Phone number support | Yes |
| SIP support | Yes |
| Call recording | Yes |
| Concurrent call limit | Not verified |
| SDK languages | Not verified |
| Deployment | Cloud |
| Compliance & security | ISO 27001 |
| Support | Tickets, Docs |
| Built for | Mid-market, Enterprise (editorial estimate) |
| Pricing | Pricing on request (source) |
| Website | simwood.com |
| Facts checked | 23 Sep 2026 |
Alternatives to Simwood API
- Vonage Voice APIA broad voice API for building PSTN, SIP, WebRTC, IVR, and AI call workflows.9.4
- Twilio Elastic SIP TrunkingA focused SIP-to-PSTN service with secure trunking and pay-as-you-go voice charges.9.2
- Bandwidth Voice APIA broad PSTN voice API for calling, media control, transcription, and AI streaming.9.1
See all Simwood API alternatives →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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