Freedom251 › Customer Service Text Messaging Software
Sinch SMS API
What Sinch SMS API is
Sinch SMS API lets applications send and receive SMS messages worldwide through an API. It supports two-way SMS, MMS, delivery reports, traffic controls, scheduled messages, inbound webhooks, short codes, toll-free numbers, and a testing sandbox. Sinch says its service has more than 600 direct carrier connections, direct-to-carrier routing, SLA-backed uptime, and prioritized routing for one-time-password delivery. Built-in AI monitors traffic for smishing, bot activity, and artificially inflated traffic, detecting or blocking it in real time. Businesses can use the service for campaigns, customer updates, identity verification, alerts, and customer service. SDKs are listed for Java, .NET, Node.js, Python, PHP, and Ruby, with integrations including Adobe Campaign, HubSpot, Shopify, Salesforce, SAP, and Zapier. The product page states GDPR compliance and ISO 27001 certification. New Sinch Build accounts receive trial credit and API keys without a credit card. Pricing is usage-based and destination-specific.
Who it suits
Sinch SMS API suits businesses sending alerts, verification codes, campaigns, updates, commands, or service messages through software. Developers can use its listed SDKs, webhooks, and integrations.
What it does well
- Supports two-way SMS and MMS
- Inbound webhooks, short codes, and toll-free numbers
- SDKs cover six programming languages
- Trial credit requires no credit card
- AI monitors and blocks specified traffic threats
What to know first
- No free plan
- Pricing varies by destination and usage
- Listed inbound rates add carrier fees
- API-based service requires development work
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Pay as you go | Usage-based SMS pricing · Destination-specific rates | On request |
| Pay as you go | Usage-based SMS pricing · Destination-specific rates | On request |
| Sinch SMS API (pay-as-you-go; 10DLC) | Per inbound message; carrier fees apply. · 10DLC · carrier fees apply | $0.01, paid once |
| Sinch SMS API (pay-as-you-go; short code) | Per inbound message; carrier fees apply. · Short code · carrier fees apply | $0.01, paid once |
As sinch.com lists them, read 24 Sept 2026. The maker's own page has the final word.
Verdict
Sinch SMS API provides broad messaging features, developer tooling, and traffic controls for business communications. Its paid, usage-based model and destination-specific rates should be reviewed before deployment.
Facts from Sinch SMS API's own pages
- Carrier network
- Sinch says its SMS service has more than 600 direct carrier connections. · sinch.com, 4 Oct 2026
- Company history
- Sinch’s About page says its founders set out in 2008 to transform customer communications. · sinch.com, 4 Oct 2026
- Compliance
- The SMS API page states that Sinch SMS API is GDPR compliant and ISO 27001 certified. · sinch.com, 4 Oct 2026
- Delivery
- The service advertises direct-to-carrier routing, SLA-backed uptime, and prioritized routing for OTP delivery. · sinch.com, 4 Oct 2026
- Founded
- 2008 · sinch.com, 28 Sept 2026
- Fraud prevention
- Built-in AI monitors traffic and detects or blocks smishing, bot traffic, and artificially inflated traffic in real time. · sinch.com, 4 Oct 2026
- Free plan
- No · sinch.com, 24 Sept 2026
- Headquarters
- Stockholm, Sweden · sinch.com, 28 Sept 2026
- Inbound webhooks
- Yes · sinch.com, 24 Sept 2026
- Integrations
- Sinch’s integrations page lists platforms including Adobe Campaign, HubSpot, Shopify, Salesforce, SAP, and Zapier. · sinch.com, 4 Oct 2026
- Messaging features
- Listed features include two-way SMS, delivery reports, traffic controls, scheduled messages, and a testing sandbox. · sinch.com, 4 Oct 2026
- Purpose
- Sinch SMS API lets applications send and receive SMS messages worldwide. · sinch.com, 4 Oct 2026
- SDK languages
- Java,.NET,Node.js,Python,PHP,Ruby · sinch.com, 24 Sept 2026
- Short code support
- Yes · sinch.com, 24 Sept 2026
- Support
- Sinch’s product page directs prospective customers to contact sales or use developer documentation to get started. · sinch.com, 4 Oct 2026
- Toll-free numbers
- Yes · sinch.com, 24 Sept 2026
- Trial
- Sinch says new Sinch Build accounts receive trial credit, a default project, and API keys without requiring a credit card. · sinch.com, 4 Oct 2026
- Trust certifications
- Sinch’s Trust Center lists ISO 27001:2022, SOC 2 Type II, PCI, GDPR, CSA, HECVAT, and HIPAA badges, and says certifications may apply to specific products. · trust.sinch.com, 4 Oct 2026
- Two-way SMS
- Yes · sinch.com, 24 Sept 2026
- Use cases
- Sinch describes use cases including marketing campaigns, customer updates, identity verification, and customer service. · sinch.com, 4 Oct 2026
- Who it is for
- Sinch describes the SMS API for businesses using SMS for alerts, codes, commands, campaigns, updates, verification, and service messages. · sinch.com, 4 Oct 2026
Where Sinch SMS API stands on Freedom251
- Customer Service Text Messaging Software#5 of 10
- SMS API services#19 of 35
- Transactional SMS Software#47 of 76
- SMS APIs#26 of 34