Comparison
Overview
Company snapshot and where each provider is based.
| Field | seven.io | Sinch |
|---|---|---|
| What it is | German CPaaS platform (formerly sms77) providing SMS, RCS, WhatsApp and voice APIs with data processed on German-hosted infrastructure. | Cloud communications platform for messaging, voice, and email APIs |
| Founded | 2003 | 2008 |
| Ownership | private | public |
| Employees | 2-10 | 3,000-5,000 |
| HQ city | Kiel | Stockholm |
| HQ country | Germany (EU) | Sweden (EU) |
What's the differenceSinch edges ahead on the overall messaging.dev Score (92 vs 42). seven.io is private and headquartered in Kiel, Germany (EU); Sinch is public and based in Stockholm, Sweden (EU).
Channels
Which messaging channels each provider can send and receive on.
| Field | seven.io | Sinch |
|---|---|---|
| SMS | Yes | Yes |
| MMS | No | Yes |
| RCS | Yes | Yes |
| Yes | Yes | |
| Viber | No | Yes |
| Facebook Messenger | No | Yes |
| Telegram | No | Yes |
| Apple Messages for Business | No | Yes |
| Voice | Yes | Yes |
| No | Yes |
What's the differenceThey share 4 channels. Sinch additionally offers MMS, Viber, Facebook Messenger, Telegram, Apple Messages for Business, Email.
Developer Experience
How quickly a developer can sign up and send a first message.
| Field | seven.io | Sinch |
|---|---|---|
| Self-service onboarding | Yes | Yes |
| Free developer credit | €0.50 free test credit | Yes |
| Docs quality | high | high |
| Documentation | Open ↗ | Open ↗ |
| SDKs | PHP, JavaScript, Python, Go, Ruby, .NET, Rust, Kotlin, Elixir, Swift | Java, Python, C#, Node.js, PHP |
| Sandbox / test env | Yes | Yes |
| API types | REST, SMPP, SMTP | REST, SMTP, SMPP |
What's the differenceOn SDKs, seven.io adds JavaScript, Go, Ruby, .NET, Rust, Kotlin, Elixir, Swift; Sinch adds Java, C#, Node.js.
Data & Compliance
Data residency options and enterprise compliance certifications.
| Field | seven.io | Sinch |
|---|---|---|
| EU data residency | Yes | Yes |
| US data residency | No | Yes |
| Choose region | No | Yes |
| GDPR | Yes | Yes |
| ISO 27001 | Yes | Yes |
| SOC 2 | No | Yes |
| HIPAA | No | Yes |
What's the differenceSinch offers US data residency, while seven.io does not; Sinch offers Choose region, while seven.io does not; Sinch offers SOC 2, while seven.io does not; Sinch offers HIPAA, while seven.io does not.
Data Retention
How long message content and metadata are stored, and whether that is configurable.
| Field | seven.io | Sinch |
|---|---|---|
| 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. | Sinch retains message and delivery records to provide the service and meet legal obligations; retention windows for message content are limited and, for some products, configurable via data-processing agreements. |
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. Sinch: Sinch retains message and delivery records to provide the service and meet legal obligations; retention windows for message content are limited and, for some products, configurable via data-processing agreements.
Pricing & Credits
Pricing model and the cost of a first message.
| Field | seven.io | Sinch |
|---|---|---|
| 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 per message with volume and committed-use pricing |
| SMS starting price | €0.075 per SMS (base rate incl. Germany and most EU countries); non-EU rates vary by country | Approx. $0.0075 per US SMS segment (varies by volume; plus carrier fees) |
| Free developer credit | €0.50 free test credit | Yes |
What's the differenceseven.io and Sinch are closely matched on pricing & credits — no material differences in the tracked fields.
Reach & Reliability
Global coverage and delivery dependability.
| Field | seven.io | Sinch |
|---|---|---|
| Countries covered | 0 | 150 |
| Direct operator connections | No | Yes |
| Published uptime SLA | No published SLA | 99.95% |
What's the differenceSinch leads on Countries covered (150 vs 0 for seven.io); Sinch offers Direct operator connections, while seven.io does not.
Company & Trust
Independent reviews and company profile.
| Field | seven.io | Sinch |
|---|---|---|
| G2 rating | 0.0 | 4.3 |
| G2 reviews | 0 | 150 |
| Ownership | private | public |
| Employees | 2-10 | 3,000-5,000 |
What's the differenceSinch leads on G2 rating (4.3 vs 0 for seven.io); Sinch leads on G2 reviews (150 vs 0 for seven.io).
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