Comparison
Overview
Company snapshot and where each provider is based.
| Field | MessageFlow | Smstools |
|---|---|---|
| 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. | Belgian business-messaging platform by Xtreme Internet Solutions offering an SMS gateway API, bulk SMS marketing software, WhatsApp Business API, voice messages and email-to-SMS with EU-only hosting. |
| Founded | 2005 | 2004 |
| Ownership | public | private |
| Employees | 51-200 | 1-10 |
| HQ city | Poznań | Dilsen-Stokkem |
| HQ country | Poland (EU) | Belgium (EU) |
What's the differenceMessageFlow edges ahead on the overall messaging.dev Score (59 vs 56). MessageFlow is public and headquartered in Poznań, Poland (EU); Smstools is private and based in Dilsen-Stokkem, Belgium (EU).
Channels
Which messaging channels each provider can send and receive on.
| Field | MessageFlow | Smstools |
|---|---|---|
| SMS | Yes | Yes |
| MMS | No | No |
| RCS | Yes | No |
| 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 2 channels. MessageFlow additionally offers RCS, Viber, Email, while Smstools additionally offers Voice.
Developer Experience
How quickly a developer can sign up and send a first message.
| Field | MessageFlow | Smstools |
|---|---|---|
| Self-service onboarding | Yes | Yes |
| Free developer credit | 30-day trial: 100 SMS + 100 emails | Free test credit on sign-up |
| Docs quality | med | high |
| Documentation | Open ↗ | Open ↗ |
| SDKs | — | PHP, Node.js, Python, Ruby, PowerShell |
| Sandbox / test env | Yes | Yes |
| API types | REST, SMTP | REST, SMTP |
What's the differenceOn SDKs, Smstools adds PHP, Node.js, Python, Ruby, PowerShell.
Data & Compliance
Data residency options and enterprise compliance certifications.
| Field | MessageFlow | Smstools |
|---|---|---|
| EU data residency | Yes | Yes |
| US data residency | No | No |
| Choose region | No | No |
| GDPR | Yes | Yes |
| ISO 27001 | Yes | No |
| SOC 2 | Yes | No |
| HIPAA | No | No |
What's the differenceMessageFlow offers ISO 27001, while Smstools does not; MessageFlow offers SOC 2, while Smstools does not.
Data Retention
How long message content and metadata are stored, and whether that is configurable.
| Field | MessageFlow | Smstools |
|---|---|---|
| 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). | Not publicly documented in detail. Smstools states all data is stored on servers located in Europe under GDPR-compliant processes, with AES-256 encryption at rest and TLS 1.3 in transit, and a Data Processing Agreement is available on request, but no specific message content/metadata retention periods are published. |
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). Smstools: Not publicly documented in detail. Smstools states all data is stored on servers located in Europe under GDPR-compliant processes, with AES-256 encryption at rest and TLS 1.3 in transit, and a Data Processing Agreement is available on request, but no specific message content/metadata retention periods are published.
Pricing & Credits
Pricing model and the cost of a first message.
| Field | MessageFlow | Smstools |
|---|---|---|
| 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 per message with volume discounts; no subscription, setup fee or monthly minimum, with a personalised rate sheet issued on registration. |
| 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 €0.025 per SMS to the USA (rates vary by destination country and volume) |
| Free developer credit | 30-day trial: 100 SMS + 100 emails | Free test credit on sign-up |
What's the differenceMessageFlow and Smstools are closely matched on pricing & credits — no material differences in the tracked fields.
Reach & Reliability
Global coverage and delivery dependability.
| Field | MessageFlow | Smstools |
|---|---|---|
| Countries covered | 190 | 200 |
| Direct operator connections | Yes | Yes |
| Published uptime SLA | No published SLA (custom SLA available on Enterprise plans) | 99.99% (uptime SLA) |
What's the differenceSmstools leads on Countries covered (200 vs 190 for MessageFlow).
Company & Trust
Independent reviews and company profile.
| Field | MessageFlow | Smstools |
|---|---|---|
| G2 rating | 4.9 | 0.0 |
| G2 reviews | 11 | 0 |
| Ownership | public | private |
| Employees | 51-200 | 1-10 |
What's the differenceMessageFlow leads on G2 rating (4.9 vs 0 for Smstools); MessageFlow leads on G2 reviews (11 vs 0 for Smstools).
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