Comparison
Overview
Company snapshot and where each provider is based.
| Field | SMSAPI | Twilio |
|---|---|---|
| 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. | Customer engagement platform with communications APIs for SMS, voice, email, and more |
| Founded | 2007 | 2008 |
| Ownership | public | public |
| Employees | 51-200 | 5,000-6,000 |
| HQ city | Gliwice | San Francisco |
| HQ country | Poland (EU) | USA |
What's the differenceTwilio edges ahead on the overall messaging.dev Score (88 vs 44). SMSAPI is public and headquartered in Gliwice, Poland (EU); Twilio is public and based in San Francisco, USA.
Channels
Which messaging channels each provider can send and receive on.
| Field | SMSAPI | Twilio |
|---|---|---|
| SMS | Yes | Yes |
| MMS | Yes | Yes |
| RCS | Yes | Yes |
| Yes | Yes | |
| Viber | No | No |
| Facebook Messenger | No | No |
| Telegram | No | No |
| Apple Messages for Business | No | No |
| Voice | Yes | Yes |
| No | Yes |
What's the differenceThey share 5 channels. Twilio additionally offers Email.
Developer Experience
How quickly a developer can sign up and send a first message.
| Field | SMSAPI | Twilio |
|---|---|---|
| Self-service onboarding | Yes | Yes |
| Free developer credit | Free test SMS on signup | $15 trial credit |
| Docs quality | high | high |
| Documentation | Open ↗ | Open ↗ |
| SDKs | PHP, Python, JavaScript, Java, C#, Go, Bash | Node.js, Python, PHP, Java, C#, Ruby, Go |
| Sandbox / test env | Yes | Yes |
| API types | REST, SMTP | REST, SMTP |
What's the differenceOn SDKs, SMSAPI adds JavaScript, Bash; Twilio adds Node.js, Ruby.
Data & Compliance
Data residency options and enterprise compliance certifications.
| Field | SMSAPI | Twilio |
|---|---|---|
| EU data residency | Yes | Yes |
| US data residency | No | Yes |
| Choose region | No | Yes |
| GDPR | Yes | Yes |
| ISO 27001 | Yes | Yes |
| SOC 2 | No | Yes |
| HIPAA | No | Yes |
What's the differenceTwilio offers US data residency, while SMSAPI does not; Twilio offers Choose region, while SMSAPI does not; Twilio offers SOC 2, while SMSAPI does not; Twilio offers HIPAA, while SMSAPI does not.
Data Retention
How long message content and metadata are stored, and whether that is configurable.
| Field | SMSAPI | Twilio |
|---|---|---|
| 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). | Twilio stores message and call records by default; customers can enable message body redaction and configure data retention/deletion for message content. Some metadata is retained for a required period for billing and compliance. |
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). Twilio: Twilio stores message and call records by default; customers can enable message body redaction and configure data retention/deletion for message content. Some metadata is retained for a required period for billing and compliance.
Pricing & Credits
Pricing model and the cost of a first message.
| Field | SMSAPI | Twilio |
|---|---|---|
| Pricing model | Pay-as-you-go prepaid credit — pay only for sent messages with no setup fee or contract; minimum top-up around €30. | Pay-as-you-go per message/minute with volume and committed-use discounts |
| SMS starting price | From ~€0.04 per SMS (international, varies by destination country) | $0.0079 per US SMS segment (plus carrier fees) |
| Free developer credit | Free test SMS on signup | $15 trial credit |
What's the differenceSMSAPI and Twilio are closely matched on pricing & credits — no material differences in the tracked fields.
Reach & Reliability
Global coverage and delivery dependability.
| Field | SMSAPI | Twilio |
|---|---|---|
| Countries covered | 0 | 180 |
| Direct operator connections | No | Yes |
| Published uptime SLA | No published SLA | 99.95% (Enterprise Edition) |
What's the differenceTwilio leads on Countries covered (180 vs 0 for SMSAPI); Twilio offers Direct operator connections, while SMSAPI does not.
Company & Trust
Independent reviews and company profile.
| Field | SMSAPI | Twilio |
|---|---|---|
| G2 rating | 0.0 | 4.2 |
| G2 reviews | 0 | 700 |
| Ownership | public | public |
| Employees | 51-200 | 5,000-6,000 |
What's the differenceTwilio leads on G2 rating (4.2 vs 0 for SMSAPI); Twilio leads on G2 reviews (700 vs 0 for SMSAPI).
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