No. 1 of 74 ·Transactional SMS Software

ClickSend SMS API

Web · Mac · iPhone · API

Freedom report

Three barsScore 6.5

Free tierA free tier is on its own pricing page
Open codeNo open-source code on record
Runs widely3 of 6 device platforms
DocumentedPlans, terms and facts published

ClickSend SMS API is ranked #1 of 74 in transactional SMS software on Freedom251. It runs on API, iOS, macOS, Web. There is no free plan. A free trial is offered.

ClickSend SMS API plans and pricing

All plans

Boost Free Pay-as-you-go; top-up from $20 SMS; top-up from $20 · no subscription clicksend.com · 2 Oct 2026

Growth Free Pay-as-you-go; top-up from $500 SMS · save 7% · top-up from $500 clicksend.com · 2 Oct 2026

Scale Free Pay-as-you-go; top-up from $3,000 SMS · save 14% · top-up from $3,000 clicksend.com · 2 Oct 2026

Enterprise Free Pay-as-you-go; top-up from $10,000 SMS · save 21% · top-up from $10,000 clicksend.com · 2 Oct 2026

Compared on transactional SMS software

Free plan: No
Pay-as-you-go: Yes
SMS API: Yes
Delivery status: Yes
Webhooks: Yes
Two-way messaging: Yes

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The record

Product: ClickSend provides business SMS for sending and receiving texts, through its browser service or API.
API functions: The SMS API supports sending and managing SMS, checking send costs, and viewing message history.
Use cases: The product supports promotional campaigns, transactional messages such as reminders and delivery updates, and one-time-password verification.
Automation: ClickSend describes recurring message workflows ranging from no-code integrations to full-code builds.
Messaging: The service supports two-way conversational messaging, and the pricing page says inbound SMS replies are free.
Integrations: Listed integrations include Zapier, Microsoft Power Automate, Make, GoHighLevel, ActiveCampaign, Salesforce, Bubble.io, and IFTTT.
Developer tools: ClickSend offers SDKs for PHP, Node.js, Ruby, Swift, Objective-C, Python, C#, Java, Go, and Perl.
Security: ClickSend says customer connections are protected with TLS 1.2 using AES ciphers, and sensitive data is encrypted at rest and in transit.
Access controls: Customers can manage API keys in the web portal, while ClickSend says staff access uses role-based controls and multi-factor authentication.
Support and reliability: The SMS page advertises human-staffed chat support 24 hours a day, 365 days a year, and a 99.95% uptime SLA guarantee.
Pricing limits: The pricing page says additional carrier fees apply, and messages exceeding 160 characters are charged as multiple message parts.
URL messaging limitation: The API documentation says ClickSend is pausing SMS messages containing URLs for new customers and directs customers to contact support for approval.
Founded: 2013
Headquarters: Melbourne, Victoria, Australia

Where it ranks on Freedom251

Best Transactional SMS Software in 2026#1 of 74

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Sources

clicksend.com/us/sms/· checked 2 Oct 2026
developers.clicksend.com/docs/messaging/sms· checked 2 Oct 2026
clicksend.com/en/pricing/· checked 2 Oct 2026
integrations.clicksend.com· checked 2 Oct 2026
developers.clicksend.com/libraries/· checked 2 Oct 2026
clicksend.com/us/security/· checked 2 Oct 2026
help.clicksend.com/en/articles/67745-understanding-us-sms-· checked 2 Oct 2026