Sinch SMS API

C tier on Transactional SMS SoftwareScore 5.7 · #37 of 76

Android app: Not listed
Free plan: Trial only
Runs on: api

sinch.com

Summary

Sinch SMS API lets applications send and receive SMS messages worldwide. Its listed features include two-way messaging, delivery reports, traffic controls, scheduled messages, and a testing sandbox. Sinch advertises 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. Businesses can use the API for campaigns, customer updates, identity verification, and service messages. SDKs are listed for Java, .NET, Node.js, Python, PHP, and Ruby. Integrations include Adobe Campaign, HubSpot, Shopify, Salesforce, SAP, and Zapier. The SMS API page states GDPR compliance and ISO 27001 certification; Sinch’s Trust Center notes that listed certifications may apply to specific products. New Sinch Build accounts receive trial credit, a default project, and API keys without a credit card. The service is API-based, and public plan details include usage-based, destination-specific pricing. The listed inbound-message rates for 10DLC and short code are 0.01 USD per message, with carrier fees applying.

Who it is for

Sinch SMS API may suit businesses sending alerts, verification codes, campaigns, updates, or customer service messages through applications. Developers can use its SDKs or API documentation to get started.

What is good

Supports two-way SMS and inbound webhooks.
Offers delivery reports, scheduled messages, and traffic controls.
SDKs cover six listed programming languages.
Trial credit is available without a credit card.
Integrations include Salesforce, Shopify, and HubSpot.

What to know first

No free plan is listed.
Pricing varies by destination and carrier fees apply.
Listed 10DLC and short-code rates are per inbound message.

Verdict

Sinch provides an API for application-based SMS, with both inbound and outbound messaging features. Review destination rates and carrier fees for the routes and message types your service needs.

Sinch SMS API plans and pricing

All plans

Pay as you go Not published Usage-based SMS pricing · Destination-specific rates sinch.com · 24 Sept 2026

Sinch SMS API (pay-as-you-go; 10DLC) $0.01 once Per inbound message; carrier fees apply. 10DLC · carrier fees apply sinch.com · 4 Oct 2026

Sinch SMS API (pay-as-you-go; short code) $0.01 once Per inbound message; carrier fees apply. Short code · carrier fees apply sinch.com · 4 Oct 2026

Compared on transactional SMS software

Two-way SMS: Yessinch.com
Inbound webhooks: Yessinch.com
MMS support: Yessinch.com
Short code support: Yessinch.com
Toll-free numbers: Yessinch.com
SDK languages: Node.js, Java, .NET, Pythonsinch.com

Facts

Free plan: Nosinch.com · 24 Sept 2026
Purpose: Sinch SMS API lets applications send and receive SMS messages worldwide.sinch.com · 4 Oct 2026
Carrier network: Sinch says its SMS service has more than 600 direct carrier connections.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
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
Messaging features: Listed features include two-way SMS, delivery reports, traffic controls, scheduled messages, and a testing sandbox.sinch.com · 4 Oct 2026
Use cases: Sinch describes use cases including marketing campaigns, customer updates, identity verification, and customer service.sinch.com · 4 Oct 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
Integrations: Sinch’s integrations page lists platforms including Adobe Campaign, HubSpot, Shopify, Salesforce, SAP, and Zapier.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
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
Support: Sinch’s product page directs prospective customers to contact sales or use developer documentation to get started.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
Company history: Sinch’s About page says its founders set out in 2008 to transform customer communications.sinch.com · 4 Oct 2026