Comparison
Overview
Company snapshot and where each provider is based.
| Field | CM.com | GMS |
|---|---|---|
| What it is | A conversational commerce and customer engagement platform offering business messaging across SMS, RCS, WhatsApp and other channels, plus voice, email and payments, via API and cloud apps. | 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. |
| Founded | 1999 | 2006 |
| Ownership | public | private |
| Employees | 500-1,000 | 500-1,000 |
| HQ city | Breda | Baar |
| HQ country | Netherlands (EU) | Switzerland |
What's the differenceCM.com edges ahead on the overall messaging.dev Score (58 vs 36). CM.com is public and headquartered in Breda, Netherlands (EU); GMS is private and based in Baar, Switzerland.
Channels
Which messaging channels each provider can send and receive on.
| Field | CM.com | GMS |
|---|---|---|
| SMS | Yes | Yes |
| MMS | No | No |
| RCS | Yes | Yes |
| Yes | Yes | |
| Viber | Yes | Yes |
| Facebook Messenger | Yes | No |
| Telegram | Yes | No |
| Apple Messages for Business | Yes | No |
| Voice | Yes | No |
| Yes | Yes |
What's the differenceThey share 5 channels. CM.com additionally offers Facebook Messenger, Telegram, Apple Messages for Business, Voice.
Developer Experience
How quickly a developer can sign up and send a first message.
| Field | CM.com | GMS |
|---|---|---|
| Self-service onboarding | Yes | No |
| Free developer credit | No | No |
| Docs quality | high | med |
| Documentation | Open ↗ | Open ↗ |
| SDKs | PHP, Java, Python, .NET, Node.js | iOS (Swift), Android (Kotlin) |
| Sandbox / test env | Yes | No |
| API types | REST, SMPP | REST |
What's the differenceCM.com offers Self-service onboarding, while GMS does not; on SDKs, CM.com adds PHP, Java, Python, .NET, Node.js; GMS adds iOS (Swift), Android (Kotlin); CM.com offers Sandbox / test env, while GMS does not; on API types, CM.com adds SMPP.
Data & Compliance
Data residency options and enterprise compliance certifications.
| Field | CM.com | GMS |
|---|---|---|
| EU data residency | Yes | Yes |
| US data residency | No | No |
| Choose region | No | No |
| GDPR | Yes | Yes |
| ISO 27001 | Yes | Yes |
| SOC 2 | No | No |
| HIPAA | No | No |
What's the differenceCM.com and GMS are closely matched on data & compliance — no material differences in the tracked fields.
Data Retention
How long message content and metadata are stored, and whether that is configurable.
| Field | CM.com | GMS |
|---|---|---|
| Retention policy | Not publicly documented in detail. CM.com states it hosts data in Europe and holds ISO 27001/27017/27018/27701 certifications; message content and metadata retention are governed by its privacy statement and per-customer data processing agreements rather than a single published fixed retention period. | 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. |
What's the differenceCM.com: Not publicly documented in detail. CM.com states it hosts data in Europe and holds ISO 27001/27017/27018/27701 certifications; message content and metadata retention are governed by its privacy statement and per-customer data processing agreements rather than a single published fixed retention period. GMS: 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.
Pricing & Credits
Pricing model and the cost of a first message.
| Field | CM.com | GMS |
|---|---|---|
| Pricing model | Pay-per-use (pay-as-you-go) charged per message with one fixed price per destination country, volume discounts above ~50,000 messages/month, and optional subscription tiers. | Custom enterprise pricing negotiated with sales; no public self-service or per-message price list. |
| SMS starting price | Not published (per-country pay-per-use pricing requires selecting a region on the pricing page) | Not published |
| Free developer credit | No | No |
What's the differenceCM.com and GMS are closely matched on pricing & credits — no material differences in the tracked fields.
Reach & Reliability
Global coverage and delivery dependability.
| Field | CM.com | GMS |
|---|---|---|
| Countries covered | 0 | 0 |
| Direct operator connections | Yes | Yes |
| Published uptime SLA | No published SLA | 99.99% network availability (claimed; no formal SLA published) |
What's the differenceCM.com and GMS are closely matched on reach & reliability — no material differences in the tracked fields.
Company & Trust
Independent reviews and company profile.
| Field | CM.com | GMS |
|---|---|---|
| G2 rating | 4.8 | 0.0 |
| G2 reviews | 12 | 0 |
| Ownership | public | private |
| Employees | 500-1,000 | 500-1,000 |
What's the differenceCM.com leads on G2 rating (4.8 vs 0 for GMS); CM.com leads on G2 reviews (12 vs 0 for GMS).
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