Comparison
Overview
Company snapshot and where each provider is based.
| Field | GatewayAPI | SmsManager |
|---|---|---|
| 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. | Czech bulk-messaging platform for sending SMS, WhatsApp, Viber and RCS messages from a web application or a single JSON API, with direct connections to local mobile operators. |
| Founded | 1999 | 2011 |
| Ownership | private | private |
| Employees | 11-50 | 1-5 |
| HQ city | Odense | Prague |
| HQ country | Denmark (EU) | Czech Republic (EU) |
What's the differenceGatewayAPI edges ahead on the overall messaging.dev Score (54 vs 51). GatewayAPI is private and headquartered in Odense, Denmark (EU); SmsManager is private and based in Prague, Czech Republic (EU).
Channels
Which messaging channels each provider can send and receive on.
| Field | GatewayAPI | SmsManager |
|---|---|---|
| SMS | Yes | Yes |
| MMS | No | No |
| RCS | Yes | Yes |
| No | Yes | |
| Viber | No | Yes |
| Facebook Messenger | No | No |
| Telegram | No | No |
| Apple Messages for Business | No | Yes |
| Voice | No | No |
| Yes | No |
What's the differenceThey share 2 channels. GatewayAPI additionally offers Email, while SmsManager additionally offers WhatsApp, Viber, Apple Messages for Business.
Developer Experience
How quickly a developer can sign up and send a first message.
| Field | GatewayAPI | SmsManager |
|---|---|---|
| Self-service onboarding | Yes | Yes |
| Free developer credit | Test credits on request | Yes |
| Docs quality | med | high |
| Documentation | Open ↗ | Open ↗ |
| SDKs | — | JavaScript/TypeScript, PHP |
| Sandbox / test env | No | Yes |
| API types | REST, SMPP, Email-to-SMS | REST |
What's the differenceOn SDKs, SmsManager adds JavaScript/TypeScript, PHP; SmsManager offers Sandbox / test env, while GatewayAPI does not; on API types, GatewayAPI adds SMPP, Email-to-SMS.
Data & Compliance
Data residency options and enterprise compliance certifications.
| Field | GatewayAPI | SmsManager |
|---|---|---|
| EU data residency | Yes | Yes |
| US data residency | No | No |
| Choose region | Yes | No |
| GDPR | Yes | Yes |
| ISO 27001 | No | No |
| SOC 2 | No | No |
| HIPAA | No | No |
What's the differenceGatewayAPI offers Choose region, while SmsManager does not.
Data Retention
How long message content and metadata are stored, and whether that is configurable.
| Field | GatewayAPI | SmsManager |
|---|---|---|
| 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. | Under the published GDPR data processing agreement, message records (phone number and message text) older than 12 months are automatically deleted by default unless otherwise agreed; encrypted backups are kept 30 days and system logs 180 days. After contract termination, personal data is deleted or exported (CSV) free of charge within 30 days. |
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. SmsManager: Under the published GDPR data processing agreement, message records (phone number and message text) older than 12 months are automatically deleted by default unless otherwise agreed; encrypted backups are kept 30 days and system logs 180 days. After contract termination, personal data is deleted or exported (CSV) free of charge within 30 days.
Pricing & Credits
Pricing model and the cost of a first message.
| Field | GatewayAPI | SmsManager |
|---|---|---|
| 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. | Prepaid credit pay-as-you-go: free account, non-expiring credit topped up by card or bank transfer, charged only per message sent, with volume-tiered discounts and optional subscription add-on services. |
| SMS starting price | From €0.0061 per SMS (standard class, cheapest destination on the public price list; e.g. €0.0401 to Denmark) | €0.0356 per SMS to the Czech Republic (5,001-10,000 message volume tier; promotional rate €0.032), other destinations priced per country |
| Free developer credit | Test credits on request | Yes |
What's the differenceGatewayAPI and SmsManager are closely matched on pricing & credits — no material differences in the tracked fields.
Reach & Reliability
Global coverage and delivery dependability.
| Field | GatewayAPI | SmsManager |
|---|---|---|
| Countries covered | 200 | 175 |
| Direct operator connections | Yes | Yes |
| Published uptime SLA | No published SLA (99.99%+ historical uptime claimed) | No published SLA (individual SLA agreements available) |
What's the differenceGatewayAPI leads on Countries covered (200 vs 175 for SmsManager).
Company & Trust
Independent reviews and company profile.
| Field | GatewayAPI | SmsManager |
|---|---|---|
| G2 rating | 4.9 | 0.0 |
| G2 reviews | 7 | 0 |
| Ownership | private | private |
| Employees | 11-50 | 1-5 |
What's the differenceGatewayAPI leads on G2 rating (4.9 vs 0 for SmsManager); GatewayAPI leads on G2 reviews (7 vs 0 for SmsManager).
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