Comparison
Overview
Company snapshot and where each provider is based.
| Field | seven.io | SMSAPI |
|---|---|---|
| What it is | German CPaaS platform (formerly sms77) providing SMS, RCS, WhatsApp and voice APIs with data processed on German-hosted infrastructure. | 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 | 2003 | 2007 |
| Ownership | private | public |
| Employees | 2-10 | 51-200 |
| HQ city | Kiel | Gliwice |
| HQ country | Germany (EU) | Poland (EU) |
What's the differenceSMSAPI edges ahead on the overall messaging.dev Score (44 vs 42). seven.io is private and headquartered in Kiel, Germany (EU); SMSAPI is public and based in Gliwice, Poland (EU).
Channels
Which messaging channels each provider can send and receive on.
| Field | seven.io | SMSAPI |
|---|---|---|
| SMS | Yes | Yes |
| MMS | No | 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 | No |
What's the differenceThey share 4 channels. SMSAPI additionally offers MMS.
Developer Experience
How quickly a developer can sign up and send a first message.
| Field | seven.io | SMSAPI |
|---|---|---|
| Self-service onboarding | Yes | Yes |
| Free developer credit | €0.50 free test credit | Free test SMS on signup |
| Docs quality | high | high |
| Documentation | Open ↗ | Open ↗ |
| SDKs | PHP, JavaScript, Python, Go, Ruby, .NET, Rust, Kotlin, Elixir, Swift | PHP, Python, JavaScript, Java, C#, Go, Bash |
| Sandbox / test env | Yes | Yes |
| API types | REST, SMPP, SMTP | REST, SMTP |
What's the differenceOn SDKs, seven.io adds Ruby, .NET, Rust, Kotlin, Elixir, Swift; SMSAPI adds Java, C#, Bash; on API types, seven.io adds SMPP.
Data & Compliance
Data residency options and enterprise compliance certifications.
| Field | seven.io | SMSAPI |
|---|---|---|
| EU data residency | Yes | Yes |
| US data residency | No | No |
| Choose region | No | No |
| GDPR | Yes | Yes |
| ISO 27001 | Yes | Yes |
| SOC 2 | No | No |
| HIPAA | No | No |
What's the differenceseven.io and SMSAPI 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 | seven.io | SMSAPI |
|---|---|---|
| Retention policy | Log files are stored only for the legally required period and subsequently anonymized, following a stated data-minimization principle; exact message-content retention periods are not publicly documented in detail. Processing runs on German/EU infrastructure ("Pure EU Routing") in ISO 27001-certified data centers, with an online-signable DPA available. | 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 differenceseven.io: Log files are stored only for the legally required period and subsequently anonymized, following a stated data-minimization principle; exact message-content retention periods are not publicly documented in detail. Processing runs on German/EU infrastructure ("Pure EU Routing") in ISO 27001-certified data centers, with an online-signable DPA available. 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 | seven.io | SMSAPI |
|---|---|---|
| Pricing model | Prepaid pay-as-you-go: top up account balance and pay per message sent, with no monthly fee or subscription required for API access. | 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 | €0.075 per SMS (base rate incl. Germany and most EU countries); non-EU rates vary by country | From ~€0.04 per SMS (international, varies by destination country) |
| Free developer credit | €0.50 free test credit | Free test SMS on signup |
What's the differenceseven.io and SMSAPI are closely matched on pricing & credits — no material differences in the tracked fields.
Reach & Reliability
Global coverage and delivery dependability.
| Field | seven.io | SMSAPI |
|---|---|---|
| Countries covered | 0 | 0 |
| Direct operator connections | No | No |
| Published uptime SLA | No published SLA | No published SLA |
What's the differenceseven.io and SMSAPI are closely matched on reach & reliability — no material differences in the tracked fields.
Company & Trust
Independent reviews and company profile.
| Field | seven.io | SMSAPI |
|---|---|---|
| G2 rating | 0.0 | 0.0 |
| G2 reviews | 0 | 0 |
| Ownership | private | public |
| Employees | 2-10 | 51-200 |
What's the differenceseven.io and SMSAPI are closely matched on company & trust — no material differences in the tracked fields.
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