Comparison
Overview
Company snapshot and where each provider is based.
| Field | SMSAPI | SmsManager |
|---|---|---|
| What it is | A Polish business-messaging platform (a brand of LINK Mobility Poland, part of LINK Mobility Group) offering bulk SMS, MMS, VMS voice, RCS and WhatsApp Business messaging via REST API and a web interface. | 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 | 2007 | 2011 |
| Ownership | public | private |
| Employees | 51-200 | 1-5 |
| HQ city | Gliwice | Prague |
| HQ country | Poland (EU) | Czech Republic (EU) |
What's the differenceSmsManager edges ahead on the overall messaging.dev Score (51 vs 44). SMSAPI is public and headquartered in Gliwice, Poland (EU); SmsManager is private and based in Prague, Czech Republic (EU).
Channels
Which messaging channels each provider can send and receive on.
| Field | SMSAPI | SmsManager |
|---|---|---|
| SMS | Yes | Yes |
| MMS | Yes | No |
| RCS | Yes | Yes |
| Yes | Yes | |
| Viber | No | Yes |
| Facebook Messenger | No | No |
| Telegram | No | No |
| Apple Messages for Business | No | Yes |
| Voice | Yes | No |
| No | No |
What's the differenceThey share 3 channels. SMSAPI additionally offers MMS, Voice, while SmsManager additionally offers Viber, Apple Messages for Business.
Developer Experience
How quickly a developer can sign up and send a first message.
| Field | SMSAPI | SmsManager |
|---|---|---|
| Self-service onboarding | Yes | Yes |
| Free developer credit | Free test SMS on signup | Yes |
| Docs quality | high | high |
| Documentation | Open ↗ | Open ↗ |
| SDKs | PHP, Python, JavaScript, Java, C#, Go, Bash | JavaScript/TypeScript, PHP |
| Sandbox / test env | Yes | Yes |
| API types | REST, SMTP | REST |
What's the differenceOn SDKs, SMSAPI adds Python, JavaScript, Java, C#, Go, Bash; SmsManager adds JavaScript/TypeScript; on API types, SMSAPI adds SMTP.
Data & Compliance
Data residency options and enterprise compliance certifications.
| Field | SMSAPI | SmsManager |
|---|---|---|
| EU data residency | Yes | Yes |
| US data residency | No | No |
| Choose region | No | No |
| GDPR | Yes | Yes |
| ISO 27001 | Yes | No |
| SOC 2 | No | No |
| HIPAA | No | No |
What's the differenceSMSAPI offers ISO 27001, while SmsManager does not.
Data Retention
How long message content and metadata are stored, and whether that is configurable.
| Field | SMSAPI | SmsManager |
|---|---|---|
| Retention policy | Messages are stored in accordance with applicable law and disclosed only when required by a lawful request; phone numbers are used solely for SMS campaign purposes. No specific retention period is publicly documented. All data is held within the EEA on two redundant data centers in Poland (ATMAN and T-Mobile, over 150 km apart). | 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 differenceSMSAPI: Messages are stored in accordance with applicable law and disclosed only when required by a lawful request; phone numbers are used solely for SMS campaign purposes. No specific retention period is publicly documented. All data is held within the EEA on two redundant data centers in Poland (ATMAN and T-Mobile, over 150 km apart). 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 | SMSAPI | SmsManager |
|---|---|---|
| Pricing model | Pay-as-you-go prepaid credit — pay only for sent messages with no setup fee or contract; minimum top-up around €30. | 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 ~€0.04 per SMS (international, varies by destination country) | €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 | Free test SMS on signup | Yes |
What's the differenceSMSAPI and SmsManager are closely matched on pricing & credits — no material differences in the tracked fields.
Reach & Reliability
Global coverage and delivery dependability.
| Field | SMSAPI | SmsManager |
|---|---|---|
| Countries covered | 0 | 175 |
| Direct operator connections | No | Yes |
| Published uptime SLA | No published SLA | No published SLA (individual SLA agreements available) |
What's the differenceSmsManager leads on Countries covered (175 vs 0 for SMSAPI); SmsManager offers Direct operator connections, while SMSAPI does not.
Company & Trust
Independent reviews and company profile.
| Field | SMSAPI | SmsManager |
|---|---|---|
| G2 rating | 0.0 | 0.0 |
| G2 reviews | 0 | 0 |
| Ownership | public | private |
| Employees | 51-200 | 1-5 |
What's the differenceSMSAPI and SmsManager are closely matched on company & trust — no material differences in the tracked fields.
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