Private and open-source alternatives to Vonage
5 SMS and voice APIs rated against the same public privacy criteria as Vonage (Nexmo, Vonage API), with our picks first.
Why look for an alternative?
- Open source: no. Closed source.
- No trackers or telemetry: no. The website loads Adobe Launch and 6sense scripts.
- Security headers: no. Grade D (30/100+)
- Message content deleted or redacted: partial. Server logs keep message text for up to one month and call detail records for 13 months. Auto-redact removes message text before it is stored, and is turned on by request.
The alternatives
Plivo Grade F
Cloud communications platform with APIs for SMS, MMS, WhatsApp, voice calls and phone number verification.
Based in the United States (Five Eyes). Plivo scores 33 out of 100 (grade F) on the SMS and voice APIs criteria. It meets 2 of 10 criteria: TLS configuration and message content deleted or redacted.
Bandwidth Grade F
Communications platform and phone carrier with APIs for SMS, MMS, voice calls, emergency calling and phone numbers.
Based in the United States (Five Eyes). Bandwidth scores 30 out of 100 (grade F) on the SMS and voice APIs criteria. It meets 2 of 10 criteria: TLS configuration and message content deleted or redacted.
Sinch Grade F
Communications platform with APIs for SMS, MMS, RCS, WhatsApp, voice calls and phone number verification, with regional endpoints.
Based in Sweden (Fourteen Eyes). Sinch scores 25 out of 100 (grade F) on the SMS and voice APIs criteria. It meets 2 of 10 criteria: TLS configuration and EU data location.
Telnyx Grade F
Communications platform with APIs for SMS, MMS, voice calls, SIP trunking and phone number verification.
Based in the United States (Five Eyes). Telnyx scores 25 out of 100 (grade F) on the SMS and voice APIs criteria. It meets 1 of 10 criteria: message content deleted or redacted.
Infobip Grade F
Communications platform with APIs for SMS, WhatsApp, RCS, email, voice calls and phone number verification, plus customer engagement tools.
Based in the United Kingdom (Five Eyes). Infobip scores 15 out of 100 (grade F) on the SMS and voice APIs criteria. It partly meets TLS configuration, security headers and message content deleted or redacted.