Send2SIP is a free forwarding service for voice calls: users configure a landline, cable phone, VoIP line, or mobile line to forward calls or ring simultaneously to a number provided by Send2SIP, and the platform then converts and routes incoming calls to the userβs specified SIP URI. It does not provide standalone phone service and is not used for making calls. Its core value is letting users bring traditional phone lines into the SIP world without buying an extra number or porting an existing one.
Its channel is clearly voice, not email, SMS, or IM. The website lists support for carriers such as AT&T, Comcast XFINITY, T-Mobile, Sprint, Vonage, and Verizon, with coverage information mainly pointing to the U.S. market; the terms also state that the numbers provided by Send2SIP are located in the United States. The integration method is relatively traditional: no API is disclosed, and instead it relies on the call forwarding or simulring features of the userβs existing phone service, then forwards calls to any SIP URI. It is fairly practical for personal softphones, SIP PBX setups, temporary migrations, or dual-ringing scenarios.
Pricing is its biggest highlight: the service is described as 100% free, with no usage limits and no credit card required. However, that does not mean it is completely cost-free, as users are still responsible for any fees charged by their original carrier for call forwarding, simultaneous ringing, or related connections. Performance should be viewed cautiously: the terms state that the service is provided on a best-efforts basis. Although Send2SIP says it strives for 100% availability, it does not guarantee uptime and does not offer compensation for outages. Failures may come from the internet, the PSTN, the Send2SIP network, or carrier blocking/misrouting.
Send2SIP explicitly does not provide 911/E911 and cannot be used for emergency calls. Numbers are not exclusively owned by users and cannot be ported out. The service prohibits illegal activity, harassment, fraud, privacy violations, and similar uses, and may disclose relevant information in response to law enforcement requests. It also reminds users that they must determine for themselves whether using this technology is legal in their own country.
The advantages are that it is free, lightweight, does not require number porting, and can quickly route traditional inbound calls to SIP. The drawbacks are the lack of an SLA, no formal customer support guarantee, dependence on carrier compatibility, and a clearly U.S.-centric number and regulatory framework. It is suitable for individuals or small teams who understand SIP, already have compatible lines, and need low-cost inbound call bridging. It is not suitable for critical business hotlines or enterprises that require compliant SLAs and assured support.
The crawled text does not provide information about access from mainland China, payment, or local compliance, so its accessibility should be considered unknown. Domestic users in China who need stable enterprise voice access should usually evaluate alternatives such as local carrier cloud communications, compliant voice gateways, or Twilio/Telnyx/Plivo, while carefully confirming network connectivity, number ownership, and regulatory requirements.
β This review is compiled from public sources and does not constitute a purchase recommendation. Verify all facts on the vendor's official site. Verify on send2sip.com official site.
send2sip.com is an United States Comms & Email provider. TG4G tracks its product information, an overall rating of 6.0/10, and a China-accessibility score of Workable. Click "Visit Official Site" to reach send2sip.com directly.