Comparison
Overview
Company snapshot and where each provider is based.
| Field | GMS | SlickText |
|---|---|---|
| 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. | SlickText is a US and Canada SMS, MMS, and RCS marketing platform for mass texting campaigns, automation, and two-way conversations, offering a REST API and webhooks. |
| Founded | 2006 | 2012 |
| Ownership | private | private |
| Employees | 500-1,000 | 11-50 |
| HQ city | Baar | Jamestown |
| HQ country | Switzerland | USA |
What's the differenceSlickText edges ahead on the overall messaging.dev Score (38 vs 36). GMS is private and headquartered in Baar, Switzerland; SlickText is private and based in Jamestown, USA.
Channels
Which messaging channels each provider can send and receive on.
| Field | GMS | SlickText |
|---|---|---|
| SMS | Yes | Yes |
| MMS | No | Yes |
| RCS | Yes | Yes |
| Yes | No | |
| Viber | Yes | No |
| Facebook Messenger | No | No |
| Telegram | No | No |
| Apple Messages for Business | No | No |
| Voice | No | No |
| Yes | No |
What's the differenceThey share 2 channels. GMS additionally offers WhatsApp, Viber, Email, while SlickText additionally offers MMS.
Developer Experience
How quickly a developer can sign up and send a first message.
| Field | GMS | SlickText |
|---|---|---|
| Self-service onboarding | No | Yes |
| Free developer credit | No | No |
| Docs quality | med | med |
| Documentation | Open ↗ | Open ↗ |
| SDKs | iOS (Swift), Android (Kotlin) | — |
| Sandbox / test env | No | No |
| API types | REST | REST |
What's the differenceSlickText offers Self-service onboarding, while GMS does not; on SDKs, GMS adds iOS (Swift), Android (Kotlin).
Data & Compliance
Data residency options and enterprise compliance certifications.
| Field | GMS | SlickText |
|---|---|---|
| EU data residency | Yes | No |
| US data residency | No | Yes |
| Choose region | No | No |
| GDPR | Yes | No |
| ISO 27001 | Yes | No |
| SOC 2 | No | Yes |
| HIPAA | No | Yes |
What's the differenceGMS offers EU data residency, while SlickText does not; SlickText offers US data residency, while GMS does not; GMS offers GDPR, while SlickText does not; GMS offers ISO 27001, while SlickText does not; SlickText offers SOC 2, while GMS does not; SlickText offers HIPAA, while GMS does not.
Data Retention
How long message content and metadata are stored, and whether that is configurable.
| Field | GMS | SlickText |
|---|---|---|
| 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. | Not publicly documented with specific timeframes. SlickText is US-based and processes data on US infrastructure. It offers HIPAA-compliant texting with a signed BAA and states messaging/data storage is handled in accordance with HIPAA log-retention requirements, with message lifecycle management and auto-expiration available. Subscriber and message data is retained while an account remains active, and opt-out/unsubscribe requests are honored. |
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. SlickText: Not publicly documented with specific timeframes. SlickText is US-based and processes data on US infrastructure. It offers HIPAA-compliant texting with a signed BAA and states messaging/data storage is handled in accordance with HIPAA log-retention requirements, with message lifecycle management and auto-expiration available. Subscriber and message data is retained while an account remains active, and opt-out/unsubscribe requests are honored.
Pricing & Credits
Pricing model and the cost of a first message.
| Field | GMS | SlickText |
|---|---|---|
| Pricing model | Custom enterprise pricing negotiated with sales; no public self-service or per-message price list. | Monthly subscription plans that each include a fixed pool of message credits (one credit equals one standard SMS segment), with rollover credits and custom enterprise pricing. |
| SMS starting price | Not published | From $29/month for 500 credits (~$0.058 per SMS credit), US/Canada |
| Free developer credit | No | No |
What's the differenceGMS and SlickText are closely matched on pricing & credits — no material differences in the tracked fields.
Reach & Reliability
Global coverage and delivery dependability.
| Field | GMS | SlickText |
|---|---|---|
| Countries covered | 0 | 2 |
| Direct operator connections | Yes | No |
| Published uptime SLA | 99.99% network availability (claimed; no formal SLA published) | No published SLA |
What's the differenceSlickText leads on Countries covered (2 vs 0 for GMS); GMS offers Direct operator connections, while SlickText does not.
Company & Trust
Independent reviews and company profile.
| Field | GMS | SlickText |
|---|---|---|
| G2 rating | 0.0 | 4.8 |
| G2 reviews | 0 | 1,814 |
| Ownership | private | private |
| Employees | 500-1,000 | 11-50 |
What's the differenceSlickText leads on G2 rating (4.8 vs 0 for GMS); SlickText leads on G2 reviews (1,814 vs 0 for GMS).
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