Comparison
Overview
Company snapshot and where each provider is based.
| Field | GMS | Vonage |
|---|---|---|
| What it is | Enterprise CPaaS and A2P messaging provider offering SMS, WhatsApp, Viber, RCS and email through a single API, plus messaging-hub and SMS-firewall services for mobile network operators. | Communications APIs for SMS, voice, video, and messaging (part of Ericsson) |
| Founded | 2006 | 2001 |
| Ownership | private | public |
| Employees | 500-1,000 | 2,000-3,000 |
| HQ city | Baar | Holmdel |
| HQ country | Switzerland | USA |
What's the differenceVonage edges ahead on the overall messaging.dev Score (89 vs 36). GMS is private and headquartered in Baar, Switzerland; Vonage is public and based in Holmdel, USA.
Channels
Which messaging channels each provider can send and receive on.
| Field | GMS | Vonage |
|---|---|---|
| SMS | Yes | Yes |
| MMS | No | Yes |
| RCS | Yes | Yes |
| Yes | Yes | |
| Viber | Yes | Yes |
| Facebook Messenger | No | Yes |
| Telegram | No | No |
| Apple Messages for Business | No | No |
| Voice | No | Yes |
| Yes | No |
What's the differenceThey share 4 channels. GMS additionally offers Email, while Vonage additionally offers MMS, Facebook Messenger, Voice.
Developer Experience
How quickly a developer can sign up and send a first message.
| Field | GMS | Vonage |
|---|---|---|
| Self-service onboarding | No | Yes |
| Free developer credit | No | €2 free trial credit |
| Docs quality | med | high |
| Documentation | Open ↗ | Open ↗ |
| SDKs | iOS (Swift), Android (Kotlin) | Node.js, Python, PHP, Java, C#, Ruby, Kotlin |
| Sandbox / test env | No | Yes |
| API types | REST | REST |
What's the differenceVonage offers Self-service onboarding, while GMS does not; on SDKs, GMS adds iOS (Swift), Android (Kotlin); Vonage adds Node.js, Python, PHP, Java, C#, Ruby, Kotlin; Vonage offers Sandbox / test env, while GMS does not.
Data & Compliance
Data residency options and enterprise compliance certifications.
| Field | GMS | Vonage |
|---|---|---|
| EU data residency | Yes | Yes |
| US data residency | No | Yes |
| Choose region | No | Yes |
| GDPR | Yes | Yes |
| ISO 27001 | Yes | Yes |
| SOC 2 | No | Yes |
| HIPAA | No | Yes |
What's the differenceVonage offers US data residency, while GMS does not; Vonage offers Choose region, while GMS does not; Vonage offers SOC 2, while GMS does not; Vonage offers HIPAA, while GMS does not.
Data Retention
How long message content and metadata are stored, and whether that is configurable.
| Field | GMS | Vonage |
|---|---|---|
| Retention policy | Not publicly documented in detail. GMS's privacy notice states personal data is processed under EU GDPR (Regulation (EU) 2016/679) and held at its Switzerland headquarters (recognized by the European Commission as providing an adequate level of data protection); no specific retention periods for message content or metadata are published. GMS also holds ISO/IEC 27701 (privacy information management) certification. | Vonage retains message and call records to provide services and meet legal obligations; message content retention is limited and, for some APIs, configurable, with data-processing terms available for enterprise customers. |
What's the differenceGMS: Not publicly documented in detail. GMS's privacy notice states personal data is processed under EU GDPR (Regulation (EU) 2016/679) and held at its Switzerland headquarters (recognized by the European Commission as providing an adequate level of data protection); no specific retention periods for message content or metadata are published. GMS also holds ISO/IEC 27701 (privacy information management) certification. Vonage: Vonage retains message and call records to provide services and meet legal obligations; message content retention is limited and, for some APIs, configurable, with data-processing terms available for enterprise customers.
Pricing & Credits
Pricing model and the cost of a first message.
| Field | GMS | Vonage |
|---|---|---|
| Pricing model | Custom enterprise pricing negotiated with sales; no public self-service or per-message price list. | Pay-as-you-go per message/minute with volume discounts |
| SMS starting price | Not published | Approx. $0.0072 per US SMS segment (plus carrier fees) |
| Free developer credit | No | €2 free trial credit |
What's the differenceGMS and Vonage are closely matched on pricing & credits — no material differences in the tracked fields.
Reach & Reliability
Global coverage and delivery dependability.
| Field | GMS | Vonage |
|---|---|---|
| Countries covered | 0 | 200 |
| Direct operator connections | Yes | Yes |
| Published uptime SLA | 99.99% network availability (claimed; no formal SLA published) | 99.95% |
What's the differenceVonage leads on Countries covered (200 vs 0 for GMS).
Company & Trust
Independent reviews and company profile.
| Field | GMS | Vonage |
|---|---|---|
| G2 rating | 0.0 | 4.3 |
| G2 reviews | 0 | 200 |
| Ownership | private | public |
| Employees | 500-1,000 | 2,000-3,000 |
What's the differenceVonage leads on G2 rating (4.3 vs 0 for GMS); Vonage leads on G2 reviews (200 vs 0 for GMS).
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