ClickSend SMS Gateway API review
A broad SMS API suite for developers needing multiple protocols and two-way messaging.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
ClickSend SMS Gateway API is a paid developer service for businesses integrating messaging into existing applications. Its scope covers programmatic SMS sending through REST, HTTP, FTP and SMPP APIs, with inbound SMS retrieval, webhook delivery and two-way messaging. It also supports MMS, scheduled messages, cancellation endpoints and delivery receipts. The product suits teams that need more than outbound SMS or want to connect messaging workflows through different technical interfaces.
Pricing is usage-based rather than organized around a recurring monthly plan. The published pricing structure uses credit top-ups and per-message pricing, with pricing varying by country. That model can fit applications with changing message volumes, while requiring teams to account for message charges and country-specific rates. There is no free plan, but a 14-day trial is available. Dedicated numbers, toll-free numbers and short codes are offered in supported markets, subject to country-specific registration and carrier requirements.
The API breadth is the main reason to consider ClickSend. In addition to the four interface types, the product lists SDKs or libraries for PHP, Node.js, Ruby, Swift, Objective-C, Python, C#, Java, Go and Perl. Scheduling, cancellation, receipt webhooks and inbound handling cover common operational needs around messaging. Choose it when multi-protocol access, two-way SMS, MMS or broad language coverage matters. An alternative may be a better fit for teams seeking a recurring monthly plan or a simpler, narrowly focused SMS interface.
ClickSend SMS Gateway API pros and cons
- Where it wins
- REST, HTTP, FTP and SMPP APIs support varied integrations
- Two-way SMS, inbound webhooks and delivery receipts
- MMS, scheduling and ten listed SDK or library languages
- Where it doesn't
- Usage-based pricing requires credit top-ups and per-message charges
- Number availability varies by country and carrier requirements
- Dedicated numbers, toll-free numbers and short codes depend on supported markets
ClickSend SMS Gateway API fact sheet, pricing and score →
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