Comparison
Overview
Company snapshot and where each provider is based.
| Field | seven.io | SlickText |
|---|---|---|
| What it is | German CPaaS platform (formerly sms77) providing SMS, RCS, WhatsApp and voice APIs with data processed on German-hosted infrastructure. | SlickText is a US and Canada SMS, MMS, and RCS marketing platform for mass texting campaigns, automation, and two-way conversations, offering a REST API and webhooks. |
| Founded | 2003 | 2012 |
| Ownership | private | private |
| Employees | 2-10 | 11-50 |
| HQ city | Kiel | Jamestown |
| HQ country | Germany (EU) | USA |
What's the differenceseven.io edges ahead on the overall messaging.dev Score (42 vs 38). seven.io is private and headquartered in Kiel, Germany (EU); SlickText is private and based in Jamestown, USA.
Channels
Which messaging channels each provider can send and receive on.
| Field | seven.io | SlickText |
|---|---|---|
| SMS | Yes | Yes |
| MMS | No | Yes |
| RCS | Yes | Yes |
| Yes | No | |
| Viber | No | No |
| Facebook Messenger | No | No |
| Telegram | No | No |
| Apple Messages for Business | No | No |
| Voice | Yes | No |
| No | No |
What's the differenceThey share 2 channels. seven.io additionally offers WhatsApp, Voice, while SlickText additionally offers MMS.
Developer Experience
How quickly a developer can sign up and send a first message.
| Field | seven.io | SlickText |
|---|---|---|
| Self-service onboarding | Yes | Yes |
| Free developer credit | €0.50 free test credit | No |
| Docs quality | high | med |
| Documentation | Open ↗ | Open ↗ |
| SDKs | PHP, JavaScript, Python, Go, Ruby, .NET, Rust, Kotlin, Elixir, Swift | — |
| Sandbox / test env | Yes | No |
| API types | REST, SMPP, SMTP | REST |
What's the differenceOn SDKs, seven.io adds PHP, JavaScript, Python, Go, Ruby, .NET, Rust, Kotlin, Elixir, Swift; seven.io offers Sandbox / test env, while SlickText does not; on API types, seven.io adds SMPP, SMTP.
Data & Compliance
Data residency options and enterprise compliance certifications.
| Field | seven.io | SlickText |
|---|---|---|
| EU data residency | Yes | No |
| US data residency | No | Yes |
| Choose region | No | No |
| GDPR | Yes | No |
| ISO 27001 | Yes | No |
| SOC 2 | No | Yes |
| HIPAA | No | Yes |
What's the differenceSeven.io offers EU data residency, while SlickText does not; SlickText offers US data residency, while seven.io does not; seven.io offers GDPR, while SlickText does not; seven.io offers ISO 27001, while SlickText does not; SlickText offers SOC 2, while seven.io does not; SlickText 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 | SlickText |
|---|---|---|
| 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. | Not publicly documented with specific timeframes. SlickText is US-based and processes data on US infrastructure. It offers HIPAA-compliant texting with a signed BAA and states messaging/data storage is handled in accordance with HIPAA log-retention requirements, with message lifecycle management and auto-expiration available. Subscriber and message data is retained while an account remains active, and opt-out/unsubscribe requests are honored. |
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. SlickText: Not publicly documented with specific timeframes. SlickText is US-based and processes data on US infrastructure. It offers HIPAA-compliant texting with a signed BAA and states messaging/data storage is handled in accordance with HIPAA log-retention requirements, with message lifecycle management and auto-expiration available. Subscriber and message data is retained while an account remains active, and opt-out/unsubscribe requests are honored.
Pricing & Credits
Pricing model and the cost of a first message.
| Field | seven.io | SlickText |
|---|---|---|
| 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. | Monthly subscription plans that each include a fixed pool of message credits (one credit equals one standard SMS segment), with rollover credits and custom enterprise pricing. |
| SMS starting price | €0.075 per SMS (base rate incl. Germany and most EU countries); non-EU rates vary by country | From $29/month for 500 credits (~$0.058 per SMS credit), US/Canada |
| Free developer credit | €0.50 free test credit | No |
What's the differenceseven.io and SlickText are closely matched on pricing & credits — no material differences in the tracked fields.
Reach & Reliability
Global coverage and delivery dependability.
| Field | seven.io | SlickText |
|---|---|---|
| Countries covered | 0 | 2 |
| Direct operator connections | No | No |
| Published uptime SLA | No published SLA | No published SLA |
What's the differenceSlickText leads on Countries covered (2 vs 0 for seven.io).
Company & Trust
Independent reviews and company profile.
| Field | seven.io | SlickText |
|---|---|---|
| G2 rating | 0.0 | 4.8 |
| G2 reviews | 0 | 1,814 |
| Ownership | private | private |
| Employees | 2-10 | 11-50 |
What's the differenceSlickText leads on G2 rating (4.8 vs 0 for seven.io); SlickText leads on G2 reviews (1,814 vs 0 for seven.io).
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