Comparison
Overview
Company snapshot and where each provider is based.
| Field | GatewayAPI | SlickText |
|---|---|---|
| What it is | Danish SMS gateway and messaging platform by ONLINECITY.IO offering SMS, RCS and email APIs with pay-as-you-go pricing and EU data hosting. | 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 | 1999 | 2012 |
| Ownership | private | private |
| Employees | 11-50 | 11-50 |
| HQ city | Odense | Jamestown |
| HQ country | Denmark (EU) | USA |
What's the differenceGatewayAPI edges ahead on the overall messaging.dev Score (54 vs 38). GatewayAPI is private and headquartered in Odense, Denmark (EU); SlickText is private and based in Jamestown, USA.
Channels
Which messaging channels each provider can send and receive on.
| Field | GatewayAPI | SlickText |
|---|---|---|
| SMS | Yes | Yes |
| MMS | No | Yes |
| RCS | Yes | Yes |
| No | No | |
| Viber | No | 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. GatewayAPI additionally offers Email, while SlickText additionally offers MMS.
Developer Experience
How quickly a developer can sign up and send a first message.
| Field | GatewayAPI | SlickText |
|---|---|---|
| Self-service onboarding | Yes | Yes |
| Free developer credit | Test credits on request | No |
| Docs quality | med | med |
| Documentation | Open ↗ | Open ↗ |
| SDKs | — | — |
| Sandbox / test env | No | No |
| API types | REST, SMPP, Email-to-SMS | REST |
What's the differenceOn API types, GatewayAPI adds SMPP, Email-to-SMS.
Data & Compliance
Data residency options and enterprise compliance certifications.
| Field | GatewayAPI | SlickText |
|---|---|---|
| EU data residency | Yes | No |
| US data residency | No | Yes |
| Choose region | Yes | No |
| GDPR | Yes | No |
| ISO 27001 | No | No |
| SOC 2 | No | Yes |
| HIPAA | No | Yes |
What's the differenceGatewayAPI offers EU data residency, while SlickText does not; SlickText offers US data residency, while GatewayAPI does not; GatewayAPI offers Choose region, while SlickText does not; GatewayAPI offers GDPR, while SlickText does not; SlickText offers SOC 2, while GatewayAPI does not; SlickText offers HIPAA, while GatewayAPI does not.
Data Retention
How long message content and metadata are stored, and whether that is configurable.
| Field | GatewayAPI | SlickText |
|---|---|---|
| Retention policy | Message content, sender and recipient are stored in the traffic log for 30 days, after which records are anonymized (message content and full sender deleted, last half of the recipient number removed). An optional "secret" message class skips storage of content, sender and recipient entirely. | 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 differenceGatewayAPI: Message content, sender and recipient are stored in the traffic log for 30 days, after which records are anonymized (message content and full sender deleted, last half of the recipient number removed). An optional "secret" message class skips storage of content, sender and recipient entirely. 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 | GatewayAPI | SlickText |
|---|---|---|
| Pricing model | Pay-as-you-go per-message pricing with prepaid credit; no monthly subscriptions or fees (except short-code countries), with negotiated discounts for high volumes. | 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 | From €0.0061 per SMS (standard class, cheapest destination on the public price list; e.g. €0.0401 to Denmark) | From $29/month for 500 credits (~$0.058 per SMS credit), US/Canada |
| Free developer credit | Test credits on request | No |
What's the differenceGatewayAPI and SlickText are closely matched on pricing & credits — no material differences in the tracked fields.
Reach & Reliability
Global coverage and delivery dependability.
| Field | GatewayAPI | SlickText |
|---|---|---|
| Countries covered | 200 | 2 |
| Direct operator connections | Yes | No |
| Published uptime SLA | No published SLA (99.99%+ historical uptime claimed) | No published SLA |
What's the differenceGatewayAPI leads on Countries covered (200 vs 2 for SlickText); GatewayAPI offers Direct operator connections, while SlickText does not.
Company & Trust
Independent reviews and company profile.
| Field | GatewayAPI | SlickText |
|---|---|---|
| G2 rating | 4.9 | 4.8 |
| G2 reviews | 7 | 1,814 |
| Ownership | private | private |
| Employees | 11-50 | 11-50 |
What's the differenceGatewayAPI leads on G2 rating (4.9 vs 4.8 for SlickText); SlickText leads on G2 reviews (1,814 vs 7 for GatewayAPI).
Still deciding? Read the quickstart guides: