Comparison
Overview
Company snapshot and where each provider is based.
| Field | Sinch | SmsManager |
|---|---|---|
| What it is | Cloud communications platform for messaging, voice, and email APIs | Czech bulk-messaging platform for sending SMS, WhatsApp, Viber and RCS messages from a web application or a single JSON API, with direct connections to local mobile operators. |
| Founded | 2008 | 2011 |
| Ownership | public | private |
| Employees | 3,000-5,000 | 1-5 |
| HQ city | Stockholm | Prague |
| HQ country | Sweden (EU) | Czech Republic (EU) |
What's the differenceSinch edges ahead on the overall messaging.dev Score (92 vs 51). Sinch is public and headquartered in Stockholm, Sweden (EU); SmsManager is private and based in Prague, Czech Republic (EU).
Channels
Which messaging channels each provider can send and receive on.
| Field | Sinch | SmsManager |
|---|---|---|
| SMS | Yes | Yes |
| MMS | Yes | No |
| RCS | Yes | Yes |
| Yes | Yes | |
| Viber | Yes | Yes |
| Facebook Messenger | Yes | No |
| Telegram | Yes | No |
| Apple Messages for Business | Yes | Yes |
| Voice | Yes | No |
| Yes | No |
What's the differenceThey share 5 channels. Sinch additionally offers MMS, Facebook Messenger, Telegram, Voice, Email.
Developer Experience
How quickly a developer can sign up and send a first message.
| Field | Sinch | SmsManager |
|---|---|---|
| Self-service onboarding | Yes | Yes |
| Free developer credit | Yes | Yes |
| Docs quality | high | high |
| Documentation | Open ↗ | Open ↗ |
| SDKs | Java, Python, C#, Node.js, PHP | JavaScript/TypeScript, PHP |
| Sandbox / test env | Yes | Yes |
| API types | REST, SMTP, SMPP | REST |
What's the differenceOn SDKs, Sinch adds Java, Python, C#, Node.js; SmsManager adds JavaScript/TypeScript; on API types, Sinch adds SMTP, SMPP.
Data & Compliance
Data residency options and enterprise compliance certifications.
| Field | Sinch | SmsManager |
|---|---|---|
| EU data residency | Yes | Yes |
| US data residency | Yes | No |
| Choose region | Yes | No |
| GDPR | Yes | Yes |
| ISO 27001 | Yes | No |
| SOC 2 | Yes | No |
| HIPAA | Yes | No |
What's the differenceSinch offers US data residency, while SmsManager does not; Sinch offers Choose region, while SmsManager does not; Sinch offers ISO 27001, while SmsManager does not; Sinch offers SOC 2, while SmsManager does not; Sinch offers HIPAA, while SmsManager does not.
Data Retention
How long message content and metadata are stored, and whether that is configurable.
| Field | Sinch | SmsManager |
|---|---|---|
| Retention policy | 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. | Under the published GDPR data processing agreement, message records (phone number and message text) older than 12 months are automatically deleted by default unless otherwise agreed; encrypted backups are kept 30 days and system logs 180 days. After contract termination, personal data is deleted or exported (CSV) free of charge within 30 days. |
What's the differenceSinch: 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. SmsManager: Under the published GDPR data processing agreement, message records (phone number and message text) older than 12 months are automatically deleted by default unless otherwise agreed; encrypted backups are kept 30 days and system logs 180 days. After contract termination, personal data is deleted or exported (CSV) free of charge within 30 days.
Pricing & Credits
Pricing model and the cost of a first message.
| Field | Sinch | SmsManager |
|---|---|---|
| Pricing model | Pay-as-you-go per message with volume and committed-use pricing | Prepaid credit pay-as-you-go: free account, non-expiring credit topped up by card or bank transfer, charged only per message sent, with volume-tiered discounts and optional subscription add-on services. |
| SMS starting price | Approx. $0.0075 per US SMS segment (varies by volume; plus carrier fees) | €0.0356 per SMS to the Czech Republic (5,001-10,000 message volume tier; promotional rate €0.032), other destinations priced per country |
| Free developer credit | Yes | Yes |
What's the differenceSinch and SmsManager are closely matched on pricing & credits — no material differences in the tracked fields.
Reach & Reliability
Global coverage and delivery dependability.
| Field | Sinch | SmsManager |
|---|---|---|
| Countries covered | 150 | 175 |
| Direct operator connections | Yes | Yes |
| Published uptime SLA | 99.95% | No published SLA (individual SLA agreements available) |
What's the differenceSmsManager leads on Countries covered (175 vs 150 for Sinch).
Company & Trust
Independent reviews and company profile.
| Field | Sinch | SmsManager |
|---|---|---|
| G2 rating | 4.3 | 0.0 |
| G2 reviews | 150 | 0 |
| Ownership | public | private |
| Employees | 3,000-5,000 | 1-5 |
What's the differenceSinch leads on G2 rating (4.3 vs 0 for SmsManager); Sinch leads on G2 reviews (150 vs 0 for SmsManager).
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