Comparison
Overview
Company snapshot and where each provider is based.
| Field | MessageFlow | SMSAPI |
|---|---|---|
| What it is | Cross-channel messaging platform by Polish CPaaS company Vercom S.A. (Warsaw Stock Exchange listed), providing email, SMS, RCS, mobile push, Viber and WhatsApp through a single REST API and campaign panel. | 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. |
| Founded | 2005 | 2007 |
| Ownership | public | public |
| Employees | 51-200 | 51-200 |
| HQ city | Poznań | Gliwice |
| HQ country | Poland (EU) | Poland (EU) |
What's the differenceMessageFlow edges ahead on the overall messaging.dev Score (59 vs 44). MessageFlow is public and headquartered in Poznań, Poland (EU); SMSAPI is public and based in Gliwice, Poland (EU).
Channels
Which messaging channels each provider can send and receive on.
| Field | MessageFlow | SMSAPI |
|---|---|---|
| SMS | Yes | Yes |
| MMS | No | Yes |
| RCS | Yes | Yes |
| Yes | Yes | |
| Viber | Yes | No |
| Facebook Messenger | No | No |
| Telegram | No | No |
| Apple Messages for Business | No | No |
| Voice | No | Yes |
| Yes | No |
What's the differenceThey share 3 channels. MessageFlow additionally offers Viber, Email, while SMSAPI additionally offers MMS, Voice.
Developer Experience
How quickly a developer can sign up and send a first message.
| Field | MessageFlow | SMSAPI |
|---|---|---|
| Self-service onboarding | Yes | Yes |
| Free developer credit | 30-day trial: 100 SMS + 100 emails | Free test SMS on signup |
| Docs quality | med | high |
| Documentation | Open ↗ | Open ↗ |
| SDKs | — | PHP, Python, JavaScript, Java, C#, Go, Bash |
| Sandbox / test env | Yes | Yes |
| API types | REST, SMTP | REST, SMTP |
What's the differenceOn SDKs, SMSAPI adds PHP, Python, JavaScript, Java, C#, Go, Bash.
Data & Compliance
Data residency options and enterprise compliance certifications.
| Field | MessageFlow | SMSAPI |
|---|---|---|
| EU data residency | Yes | Yes |
| US data residency | No | No |
| Choose region | No | No |
| GDPR | Yes | Yes |
| ISO 27001 | Yes | Yes |
| SOC 2 | Yes | No |
| HIPAA | No | No |
What's the differenceMessageFlow offers SOC 2, while SMSAPI does not.
Data Retention
How long message content and metadata are stored, and whether that is configurable.
| Field | MessageFlow | SMSAPI |
|---|---|---|
| Retention policy | All customer data is stated to be stored exclusively on servers within the EEA (Microsoft Azure, AWS). No overall retention period for message content is published; the API docs state sent SMS message data is kept and queryable for 60 days, and the privacy policy retains personal data for the duration of the service agreement plus statutory periods (e.g. accounting records). | 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). |
What's the differenceMessageFlow: All customer data is stated to be stored exclusively on servers within the EEA (Microsoft Azure, AWS). No overall retention period for message content is published; the API docs state sent SMS message data is kept and queryable for 60 days, and the privacy policy retains personal data for the duration of the service agreement plus statutory periods (e.g. accounting records). SMSAPI: 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).
Pricing & Credits
Pricing model and the cost of a first message.
| Field | MessageFlow | SMSAPI |
|---|---|---|
| Pricing model | Monthly subscription tiers priced by contact count (Starter from €69/month) with bundled email/SMS volumes and per-unit overages, plus a customizable Mix & Match plan (from €465/month); SMS rates vary by destination country. | Pay-as-you-go prepaid credit — pay only for sent messages with no setup fee or contract; minimum top-up around €30. |
| SMS starting price | Not published (per-country SMS rates shown only in an in-panel calculator; e.g. Grow plan €109/month includes 1,000 SMS) | From ~€0.04 per SMS (international, varies by destination country) |
| Free developer credit | 30-day trial: 100 SMS + 100 emails | Free test SMS on signup |
What's the differenceMessageFlow and SMSAPI are closely matched on pricing & credits — no material differences in the tracked fields.
Reach & Reliability
Global coverage and delivery dependability.
| Field | MessageFlow | SMSAPI |
|---|---|---|
| Countries covered | 190 | 0 |
| Direct operator connections | Yes | No |
| Published uptime SLA | No published SLA (custom SLA available on Enterprise plans) | No published SLA |
What's the differenceMessageFlow leads on Countries covered (190 vs 0 for SMSAPI); MessageFlow offers Direct operator connections, while SMSAPI does not.
Company & Trust
Independent reviews and company profile.
| Field | MessageFlow | SMSAPI |
|---|---|---|
| G2 rating | 4.9 | 0.0 |
| G2 reviews | 11 | 0 |
| Ownership | public | public |
| Employees | 51-200 | 51-200 |
What's the differenceMessageFlow leads on G2 rating (4.9 vs 0 for SMSAPI); MessageFlow leads on G2 reviews (11 vs 0 for SMSAPI).
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