Comparison
Overview
Company snapshot and where each provider is based.
| Field | Rule | Smstools |
|---|---|---|
| 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. | 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 | 2007 | 2004 |
| Ownership | private | private |
| Employees | 10-50 | 1-10 |
| HQ city | Stockholm | Dilsen-Stokkem |
| HQ country | Sweden (EU) | Belgium (EU) |
What's the differenceSmstools edges ahead on the overall messaging.dev Score (56 vs 28). Rule is private and headquartered in Stockholm, Sweden (EU); Smstools is private and based in Dilsen-Stokkem, Belgium (EU).
Channels
Which messaging channels each provider can send and receive on.
| Field | Rule | Smstools |
|---|---|---|
| SMS | Yes | Yes |
| MMS | No | No |
| RCS | Yes | No |
| 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 1 channels. Rule additionally offers RCS, Email, while Smstools additionally offers WhatsApp, Voice.
Developer Experience
How quickly a developer can sign up and send a first message.
| Field | Rule | Smstools |
|---|---|---|
| Self-service onboarding | Yes | Yes |
| Free developer credit | No | Free test credit on sign-up |
| Docs quality | med | high |
| Documentation | Open ↗ | Open ↗ |
| SDKs | Node.js, PHP | PHP, Node.js, Python, Ruby, PowerShell |
| Sandbox / test env | No | Yes |
| API types | REST | REST, SMTP |
What's the differenceOn SDKs, Smstools adds Python, Ruby, PowerShell; Smstools offers Sandbox / test env, while Rule does not; on API types, Smstools adds SMTP.
Data & Compliance
Data residency options and enterprise compliance certifications.
| Field | Rule | Smstools |
|---|---|---|
| EU data residency | Yes | Yes |
| US data residency | No | No |
| Choose region | No | No |
| GDPR | Yes | Yes |
| ISO 27001 | No | No |
| SOC 2 | No | No |
| HIPAA | No | No |
What's the differenceRule and Smstools are closely matched on data & compliance — no material differences in the tracked fields.
Data Retention
How long message content and metadata are stored, and whether that is configurable.
| Field | Rule | Smstools |
|---|---|---|
| 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. | 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 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. 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 | Rule | Smstools |
|---|---|---|
| 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 per message with volume discounts; no subscription, setup fee or monthly minimum, with a personalised rate sheet issued on registration. |
| SMS starting price | From €0.04 per SMS (0.40 SEK per SMS in Sweden), on top of the monthly plan | From €0.025 per SMS to the USA (rates vary by destination country and volume) |
| Free developer credit | No | Free test credit on sign-up |
What's the differenceRule and Smstools are closely matched on pricing & credits — no material differences in the tracked fields.
Reach & Reliability
Global coverage and delivery dependability.
| Field | Rule | Smstools |
|---|---|---|
| Countries covered | 0 | 200 |
| Direct operator connections | No | Yes |
| Published uptime SLA | No published SLA | 99.99% (uptime SLA) |
What's the differenceSmstools leads on Countries covered (200 vs 0 for Rule); Smstools offers Direct operator connections, while Rule does not.
Company & Trust
Independent reviews and company profile.
| Field | Rule | Smstools |
|---|---|---|
| G2 rating | 4.5 | 0.0 |
| G2 reviews | 9 | 0 |
| Ownership | private | private |
| Employees | 10-50 | 1-10 |
What's the differenceRule leads on G2 rating (4.5 vs 0 for Smstools); Rule leads on G2 reviews (9 vs 0 for Smstools).
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