Comparison
Overview
Company snapshot and where each provider is based.
| Field | Rule | SMSAPI |
|---|---|---|
| What it is | Swedish marketing automation platform (Rule Communication Nordic AB) for email, SMS and RCS campaigns, with a REST API for transactional message sending. | 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 | 2007 | 2007 |
| Ownership | private | public |
| Employees | 10-50 | 51-200 |
| HQ city | Stockholm | Gliwice |
| HQ country | Sweden (EU) | Poland (EU) |
What's the differenceSMSAPI edges ahead on the overall messaging.dev Score (44 vs 28). Rule is private and headquartered in Stockholm, Sweden (EU); SMSAPI is public and based in Gliwice, Poland (EU).
Channels
Which messaging channels each provider can send and receive on.
| Field | Rule | SMSAPI |
|---|---|---|
| SMS | Yes | Yes |
| MMS | No | Yes |
| RCS | Yes | Yes |
| No | Yes | |
| Viber | No | 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. Rule additionally offers Email, while SMSAPI additionally offers MMS, WhatsApp, Voice.
Developer Experience
How quickly a developer can sign up and send a first message.
| Field | Rule | SMSAPI |
|---|---|---|
| Self-service onboarding | Yes | Yes |
| Free developer credit | No | Free test SMS on signup |
| Docs quality | med | high |
| Documentation | Open ↗ | Open ↗ |
| SDKs | Node.js, PHP | PHP, Python, JavaScript, Java, C#, Go, Bash |
| Sandbox / test env | No | Yes |
| API types | REST | REST, SMTP |
What's the differenceOn SDKs, Rule adds Node.js; SMSAPI adds Python, JavaScript, Java, C#, Go, Bash; SMSAPI offers Sandbox / test env, while Rule does not; on API types, SMSAPI adds SMTP.
Data & Compliance
Data residency options and enterprise compliance certifications.
| Field | Rule | SMSAPI |
|---|---|---|
| EU data residency | Yes | Yes |
| US data residency | No | No |
| Choose region | No | No |
| GDPR | Yes | Yes |
| ISO 27001 | No | Yes |
| SOC 2 | No | No |
| HIPAA | No | No |
What's the differenceSMSAPI offers ISO 27001, while Rule does not.
Data Retention
How long message content and metadata are stored, and whether that is configurable.
| Field | Rule | SMSAPI |
|---|---|---|
| Retention policy | Privacy policy states Rule only works with partners that process personal data within the EU/EEA (or that maintain an equivalent level of protection), keeps data only as long as a customer relationship exists or it remains relevant, and does not use marketing data older than 3 years. No specific retention period for message content or logs is publicly documented. | 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 differenceRule: Privacy policy states Rule only works with partners that process personal data within the EU/EEA (or that maintain an equivalent level of protection), keeps data only as long as a customer relationship exists or it remains relevant, and does not use marketing data older than 3 years. No specific retention period for message content or logs is publicly documented. 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 | Rule | SMSAPI |
|---|---|---|
| Pricing model | Subscription tiers by contact-list size (free 250-contact plan without SMS, Professional from €595/month for 2,500 contacts, custom Enterprise) plus per-message SMS/RCS fees; a standalone SMS/RCS plan with unlimited contacts costs €100/month plus per-message rates. | 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 | From €0.04 per SMS (0.40 SEK per SMS in Sweden), on top of the monthly plan | From ~€0.04 per SMS (international, varies by destination country) |
| Free developer credit | No | Free test SMS on signup |
What's the differenceRule and SMSAPI are closely matched on pricing & credits — no material differences in the tracked fields.
Reach & Reliability
Global coverage and delivery dependability.
| Field | Rule | SMSAPI |
|---|---|---|
| Countries covered | 0 | 0 |
| Direct operator connections | No | No |
| Published uptime SLA | No published SLA | No published SLA |
What's the differenceRule and SMSAPI are closely matched on reach & reliability — no material differences in the tracked fields.
Company & Trust
Independent reviews and company profile.
| Field | Rule | SMSAPI |
|---|---|---|
| G2 rating | 4.5 | 0.0 |
| G2 reviews | 9 | 0 |
| Ownership | private | public |
| Employees | 10-50 | 51-200 |
What's the differenceRule leads on G2 rating (4.5 vs 0 for SMSAPI); Rule leads on G2 reviews (9 vs 0 for SMSAPI).
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