Comparison
Overview
Company snapshot and where each provider is based.
| Field | Attentive | Sinch |
|---|---|---|
| What it is | AI-powered SMS, MMS, RCS, email, and push marketing platform for consumer brands, with REST and GraphQL APIs for subscriber management and event-triggered messaging rather than direct message sending. | Cloud communications platform for messaging, voice, and email APIs |
| Founded | 2016 | 2008 |
| Ownership | private | public |
| Employees | 1,000-1,500 | 3,000-5,000 |
| HQ city | New York | Stockholm |
| HQ country | USA | Sweden (EU) |
What's the differenceSinch edges ahead on the overall messaging.dev Score (92 vs 40). Attentive is private and headquartered in New York, USA; Sinch is public and based in Stockholm, Sweden (EU).
Channels
Which messaging channels each provider can send and receive on.
| Field | Attentive | Sinch |
|---|---|---|
| SMS | Yes | Yes |
| MMS | Yes | Yes |
| RCS | Yes | Yes |
| No | Yes | |
| Viber | No | Yes |
| Facebook Messenger | No | Yes |
| Telegram | No | Yes |
| Apple Messages for Business | No | Yes |
| Voice | No | Yes |
| Yes | Yes |
What's the differenceThey share 4 channels. Sinch additionally offers WhatsApp, Viber, Facebook Messenger, Telegram, Apple Messages for Business, Voice.
Developer Experience
How quickly a developer can sign up and send a first message.
| Field | Attentive | Sinch |
|---|---|---|
| Self-service onboarding | No | Yes |
| Free developer credit | No | Yes |
| Docs quality | med | high |
| Documentation | Open ↗ | Open ↗ |
| SDKs | iOS (Swift), Android (Kotlin), React Native | Java, Python, C#, Node.js, PHP |
| Sandbox / test env | Yes | Yes |
| API types | REST, GraphQL | REST, SMTP, SMPP |
What's the differenceSinch offers Self-service onboarding, while Attentive does not; on SDKs, Attentive adds iOS (Swift), Android (Kotlin), React Native; Sinch adds Java, Python, C#, Node.js, PHP; on API types, Attentive adds GraphQL; Sinch adds SMTP, SMPP.
Data & Compliance
Data residency options and enterprise compliance certifications.
| Field | Attentive | Sinch |
|---|---|---|
| EU data residency | No | Yes |
| US data residency | Yes | Yes |
| Choose region | No | Yes |
| GDPR | Yes | Yes |
| ISO 27001 | No | Yes |
| SOC 2 | Yes | Yes |
| HIPAA | No | Yes |
What's the differenceSinch offers EU data residency, while Attentive does not; Sinch offers Choose region, while Attentive does not; Sinch offers ISO 27001, while Attentive does not; Sinch offers HIPAA, while Attentive does not.
Data Retention
How long message content and metadata are stored, and whether that is configurable.
| Field | Attentive | Sinch |
|---|---|---|
| Retention policy | No fixed retention periods are published; the privacy policy states personal information is retained "for as long as necessary to provide our Service or as needed to comply with applicable legal obligations." EU/UK/Swiss consumer data is transferred to and processed in the United States under the EU-U.S., UK Extension, and Swiss-U.S. Data Privacy Frameworks. | 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 differenceAttentive: No fixed retention periods are published; the privacy policy states personal information is retained "for as long as necessary to provide our Service or as needed to comply with applicable legal obligations." EU/UK/Swiss consumer data is transferred to and processed in the United States under the EU-U.S., UK Extension, and Swiss-U.S. Data Privacy Frameworks. 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 | Attentive | Sinch |
|---|---|---|
| Pricing model | Custom-quoted, usage-based subscription priced on message volume, subscriber list size, channels, and premium AI add-ons; no self-serve signup or published per-message rates. | Pay-as-you-go per message with volume and committed-use pricing |
| SMS starting price | Not published | Approx. $0.0075 per US SMS segment (varies by volume; plus carrier fees) |
| Free developer credit | No | Yes |
What's the differenceAttentive and Sinch are closely matched on pricing & credits — no material differences in the tracked fields.
Reach & Reliability
Global coverage and delivery dependability.
| Field | Attentive | Sinch |
|---|---|---|
| Countries covered | 20 | 150 |
| Direct operator connections | No | Yes |
| Published uptime SLA | No published SLA | 99.95% |
What's the differenceSinch leads on Countries covered (150 vs 20 for Attentive); Sinch offers Direct operator connections, while Attentive does not.
Company & Trust
Independent reviews and company profile.
| Field | Attentive | Sinch |
|---|---|---|
| G2 rating | 4.5 | 4.3 |
| G2 reviews | 1,483 | 150 |
| Ownership | private | public |
| Employees | 1,000-1,500 | 3,000-5,000 |
What's the differenceAttentive leads on G2 rating (4.5 vs 4.3 for Sinch); Attentive leads on G2 reviews (1,483 vs 150 for Sinch).
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