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ClickSend SMS API

clicksend.com

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Spec score 9.3 #1 of 76 in Transactional SMS Software

What it is

ClickSend SMS API provides businesses with browser-based and API tools to send and receive text messages. The API can send and manage SMS, check sending costs, and show message history. Uses include promotional campaigns, transactional messages such as reminders and delivery updates, and one-time-password verification. ClickSend supports two-way conversations and recurring messaging workflows built through no-code integrations or code. Listed integrations include Zapier, Microsoft Power Automate, Make, GoHighLevel, ActiveCampaign, Salesforce, Bubble.io, and IFTTT; SDKs are available for PHP, Node.js, Ruby, Swift, Objective-C, Python, C#, Java, Go, and Perl. ClickSend says customer connections use TLS 1.2 with AES ciphers and sensitive data is encrypted at rest and in transit. It advertises human-staffed chat support 24 hours a day, 365 days a year, and a 99.95% uptime SLA guarantee. A 14-day trial is listed, but there is no free plan. Pay-as-you-go top-ups start at $20; additional carrier fees apply, and messages over 160 characters are charged as multiple parts. New customers need support approval to send SMS containing URLs.

Spec sheet

What it does
ClickSend provides cloud business communications through SMS and MMS dashboards, mobile apps, APIs and integrations.Read 15 Oct 2026 · clicksend.com
Product
ClickSend provides business SMS for sending and receiving texts, through its browser service or API.Read 2 Oct 2026 · clicksend.com
Integrations
ClickSend advertises more than 200 integrations and names Zapier, Make, Power Automate, Salesforce, IFTTT, Magento and Bubble among them.Read 15 Oct 2026 · developers.clicksend.com
Security
ClickSend says customer connections use TLS 1.2 with AES ciphers and that sensitive data is encrypted at rest and in transit.Read 15 Oct 2026 · clicksend.com
Support
ClickSend advertises 24/7 human support and says average support response time is 30 seconds on its developer site.Read 15 Oct 2026 · developers.clicksend.com
Headquarters
LinkedIn lists Melbourne, Victoria as headquarters, while ClickSend describes its origin as Perth, Western Australia.Read 15 Oct 2026 · linkedin.com
Founded
ClickSend says founder Matt Larner started the company in 2013.Read 15 Oct 2026 · clicksend.com
Access controls
Customers can manage API keys in the web portal, while ClickSend says staff access uses role-based controls and multi-factor authentication.Read 2 Oct 2026 · clicksend.com
Analytics
SMS marketing pages state that campaign reporting and analytics are available after sending.Read 15 Oct 2026 · clicksend.com
API authentication
The v2 HTTP API authenticates with an API username and key, or subaccount credentials, and recommends SSL.Read 15 Oct 2026 · developers.clicksend.com
API functions
The SMS API supports sending and managing SMS, checking send costs, and viewing message history.Read 2 Oct 2026 · developers.clicksend.com
API limits
The legacy HTTP API documentation recommends POST for up to 1,000 simultaneous recipients and GET for fewer than 100.Read 15 Oct 2026 · developers.clicksend.com
API protocols
The company offers REST, HTTP, FTP and SMPP interfaces for SMS integration.Read 15 Oct 2026 · clicksend.com
Automation
ClickSend describes recurring message workflows ranging from no-code integrations to full-code builds.Read 2 Oct 2026 · clicksend.com
Company legal name
The Android listing identifies the developer as ClickSend Pty Ltd.Read 15 Oct 2026 · play.google.com
Company size
ClickSend says it employs more than 100 people across four continents.Read 15 Oct 2026 · clicksend.com
Compliance infrastructure
ClickSend hosts data on AWS and points to AWS accreditation for ISO 27001, HIPAA and SOC 2 requirements.Read 15 Oct 2026 · clicksend.com
Contact management
The service supports contact-list segmentation and campaign management features.Read 15 Oct 2026 · clicksend.com
Credit policy
Trial credits expire after 14 days, while prepaid credits remain available until an account has been inactive for 12 months.Read 15 Oct 2026 · help.clicksend.com
Developer tools
ClickSend offers SDKs for PHP, Node.js, Ruby, Swift, Objective-C, Python, C#, Java, Go, and Perl.Read 2 Oct 2026 · developers.clicksend.com
Documentation depth
Developer documentation includes API reference pages, quickstarts, Postman collections, OpenAPI downloads, authentication, errors, testing numbers and delivery callbacks.Read 15 Oct 2026 · developers.clicksend.com
Global coverage
The developer site says the API sends SMS and MMS to more than 190 countries through direct routes.Read 15 Oct 2026 · developers.clicksend.com
Limit: advanced features
G2 reviewers say the product lacks some sophisticated features and offers limited customization compared with more advanced platforms.Read 15 Oct 2026 · g2.com
Limit: delivery and compliance
Trustpilot reviews include complaints about country-specific delivery failures and carrier registration or compliance requirements.Read 15 Oct 2026 · trustpilot.com
Limit: high-volume cost
G2 review summaries report that costs can become high for large message volumes.Read 15 Oct 2026 · g2.com
Limit: trial credits
Software Advice reviewers complain that the free trial credits are insufficient for fully evaluating the product.Read 15 Oct 2026 · softwareadvice.com
Messaging
The service supports two-way conversational messaging, and the pricing page says inbound SMS replies are free.Read 2 Oct 2026 · clicksend.com
MMS feature
The platform API supports sending images and videos over text as MMS.Read 15 Oct 2026 · developers.clicksend.com
Node SDK status
The official Node.js SDK repository says the package is deprecated, archived and should be replaced by the newer Node SDK.Read 15 Oct 2026 · github.com
Praise: ease of use
G2, TrustRadius and Trustpilot reviewers repeatedly describe setup and everyday messaging as simple or intuitive.Read 15 Oct 2026 · trustradius.com
Praise: integrations
Reviewers mention useful integrations, including Zapier, and straightforward connections to other business tools.Read 15 Oct 2026 · softwareadvice.com
Praise: support
Trustpilot reviewers frequently praise quick, helpful human support and fast issue resolution.Read 15 Oct 2026 · trustpilot.com
Pricing limits
The pricing page says additional carrier fees apply, and messages exceeding 160 characters are charged as multiple message parts.Read 2 Oct 2026 · help.clicksend.com
Rating on Apple App Store
3.1 out of 5 from 12 ratingsRead 15 Oct 2026 · apps.apple.com
Rating on Capterra
4.3 out of 5 from 93 reviewsRead 15 Oct 2026 · capterra.com
Rating on G2
4.1 out of 5 from 49 reviewsRead 15 Oct 2026 · g2.com
Rating on Google Play
2.8 out of 5 from 53 reviewsRead 15 Oct 2026 · play.google.com
Rating on Software Advice
4.3 out of 5 from 93 reviewsRead 15 Oct 2026 · softwareadvice.com
Rating on Trustpilot
4.2 out of 5 from 3,579 reviewsRead 15 Oct 2026 · trustpilot.com
Rating on TrustRadius
6.8 out of 10 from 13 reviewsRead 15 Oct 2026 · trustradius.com
Scheduling
The Chrome extension lets users choose a future date and time for an SMS dispatch.Read 15 Oct 2026 · help.clicksend.com
SDK languages
Official SDK resources cover PHP, Node.js, Ruby, Swift, Objective-C, Python, C#, Java, Go and Perl.Read 15 Oct 2026 · developers.clicksend.com
SDK licence
The archived official Node.js SDK repository lists the ISC licence.Read 15 Oct 2026 · github.com
Self-hosting
The documented service is accessed through ClickSend-hosted API endpoints and dashboards.Read 15 Oct 2026 · developers.clicksend.com
SMS feature
The SMS API can send and manage messages, calculate sending costs, retrieve history and use delivery receipts.Read 15 Oct 2026 · developers.clicksend.com
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.Read 2 Oct 2026 · clicksend.com
Two-way messaging
Inbound replies can be forwarded by email, pushed to a URL or retrieved by polling the API.Read 15 Oct 2026 · developers.clicksend.com
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.Read 2 Oct 2026 · developers.clicksend.com
US pricing model
US SMS pricing combines a ClickSend base rate with a carrier fee, and messages over 160 characters are billed as multiple parts.Read 15 Oct 2026 · help.clicksend.com
Use cases
The product supports promotional campaigns, transactional messages such as reminders and delivery updates, and one-time-password verification.Read 2 Oct 2026 · clicksend.com

Plans and prices

Boost Priced on request Pay-as-you-go SMS · Top up from $20 Read 20 Sep 2026 · clicksend.com
Growth Priced on request Pay-as-you-go SMS · 7% saving shown on the page · Top up from $500 Read 20 Sep 2026 · clicksend.com
Scale Priced on request Pay-as-you-go SMS · 14% saving shown on the page · Top up from $3,000 Read 20 Sep 2026 · clicksend.com
Enterprise Priced on request Pay-as-you-go SMS · 21% saving shown on the page · Top up from $10,000 Read 20 Sep 2026 · clicksend.com
Boost Free Pay-as-you-go; top-up from $20 SMS; top-up from $20 · no subscription Read 2 Oct 2026 · clicksend.com
Enterprise Free Pay-as-you-go; top-up from $10,000 SMS · save 21% · top-up from $10,000 Read 2 Oct 2026 · clicksend.com
Growth Free Pay-as-you-go; top-up from $500 SMS · save 7% · top-up from $500 Read 2 Oct 2026 · clicksend.com
Scale Free Pay-as-you-go; top-up from $3,000 SMS · save 14% · top-up from $3,000 Read 2 Oct 2026 · clicksend.com
Enterprise $0.01, paid once per SMS when topping up from $2,000 67% saving · additional carrier fees apply Read 15 Oct 2026 · clicksend.com
Scale $0.01, paid once per SMS when topping up from $1,000 54% saving · additional carrier fees apply Read 15 Oct 2026 · clicksend.com
Growth $0.02, paid once per SMS when topping up from $100 28% saving · additional carrier fees apply Read 15 Oct 2026 · clicksend.com
Boost $0.03, paid once per SMS when topping up from $20 small-business tier · additional carrier fees apply Read 15 Oct 2026 · clicksend.com

Every ClickSend SMS API plan and price →

Strong points and limits

Strong points

  • API supports send management, cost checks, and history.
  • Supports two-way messaging; inbound replies are free.
  • SDKs are available for ten listed languages.
  • Advertises 24/7/365 human chat support.
  • Advertises a 99.95% uptime SLA guarantee.

Limits

  • No free plan; only a 14-day trial is listed.
  • Additional carrier fees apply.
  • Messages over 160 characters incur multiple parts.
  • New customers need approval for messages containing URLs.

Who it suits

ClickSend suits businesses sending promotional, transactional, or verification texts, including teams that want API access or automated messaging workflows. It also fits teams that need two-way replies or integrations with the listed services.

ClickSend SMS API in depth

Read the full write-up

ClickSend SMS API pairs business texting in a browser with an API for sending and receiving messages. It suits teams that need SMS for campaigns, service updates or verification and want to connect messaging to existing workflows. The main trade-off is a high entry top-up, alongside approval requirements for URLs in messages sent by new customers.

Overview

ClickSend supports promotional campaigns, transactional texts such as reminders and delivery updates, and one-time-password verification. Its API can send and manage messages, check send costs and show message history. Delivery status, webhooks and two-way messaging give teams ways to track delivery and handle replies; inbound SMS replies are free.

Recurring workflows can use no-code integrations or full-code builds, so the service can fit teams with different technical resources. But businesses that rely on links in their texts should settle the URL restriction before committing: ClickSend is pausing URL-containing SMS for new customers and requires support approval.

Key features

API and developer tools: SDKs are available for PHP, Node.js, Ruby, Swift, Objective-C, Python, C#, Java, Go and Perl. Message history and send-cost checks support day-to-day management, while delivery status and webhooks help connect sending to operational systems.

Integrations and automation: Integrations include Zapier, Microsoft Power Automate, Make, GoHighLevel, ActiveCampaign, Salesforce, Bubble.io and IFTTT. This range supports teams building recurring workflows across established tools; full-code builds remain an option where integrations are not the right fit.

Two-way messaging: Customers can receive replies as well as send SMS, and inbound replies are free. That makes conversational exchanges less costly on the reply side, though carrier fees and multipart charges still affect overall spend.

Security and service commitments: ClickSend says connections use TLS 1.2 with AES ciphers and sensitive data is encrypted at rest and in transit. API keys are managed in the web portal; staff access uses role-based controls and multi-factor authentication. The SMS page advertises round-the-clock, year-round human chat support and a 99.95% uptime SLA, useful considerations for teams relying on messaging operations.

Pricing

ClickSend is a paid, pay-as-you-go service with a 14-day trial and no free plan. The tiers are presented as follows:

Boost: free, billed pay-as-you-go, with a $20 minimum top-up and no subscription. This is the lowest entry point, suited to smaller-scale use, but requires more upfront funding than a small test may warrant.

Growth: free, billed pay-as-you-go, with a $500 minimum top-up and 7% savings. It is aimed at higher-volume buyers able to commit more balance to access the stated discount.

Scale: free, billed pay-as-you-go, with a $3,000 minimum top-up and 14% savings. The larger commitment makes sense only where usage can justify that balance.

Enterprise: free, billed pay-as-you-go, with a $10,000 minimum top-up and 21% savings. It offers the greatest stated savings, but the substantial top-up makes it a poor fit for uncertain or modest volumes.

These are top-up thresholds, not a stated per-message rate. Additional carrier fees apply, and messages longer than 160 characters are charged as multiple parts, so campaign length and destination affect costs. Free inbound replies help with two-way use, but do not remove those sending charges.

Platforms

ClickSend supports API, iOS, macOS and web. Browser access suits teams managing messaging without building a dedicated API workflow, while the API and SDKs target software teams integrating SMS into applications or processes.

Who it's for

ClickSend is a strong fit for businesses sending recurring operational or promotional SMS that need API access, workflow integrations, delivery tracking or replies. Its language coverage and automation options give developers and operations teams room to choose how much to build. It is less suitable for organizations unable to meet the entry top-up, or for new customers whose SMS must include URLs before approval is secured.

Pros and cons

Pro: A broad SDK selection and named automation integrations support both custom development and no-code workflows.

Pro: Delivery status, webhooks, history and cost checks cover practical needs for monitoring and managing message flows.

Pro: Inbound replies are free, benefiting teams that need two-way SMS.

Con: The minimum top-up rises from $20 to $10,000 across tiers, making discounted rates dependent on committing increasingly large balances.

Con: Carrier fees and multipart billing mean a headline tier discount does not by itself predict total message cost.

Con: New customers need support approval for SMS containing URLs, a significant constraint for link-dependent campaigns.

Alternatives

Transactional SMS Software is a broader category to explore when comparing services for transactional messaging.

Textmagic is worth considering for teams wanting Android support and a prepaid Essential plan priced at $0.05 a month; its rate varies by destination country and covers 160 plain-text characters per SMS part.

Bandwidth Messaging API may suit teams focused on U.S. outbound SMS, with per-message pricing shown for 10DLC and short-code traffic.

Clickatell SMS API is an option for readers seeking a free plan alongside pay-as-you-go messaging, with outgoing message prices varying by destination and message type.

Mailchimp is a different fit for teams needing email marketing: its free plan includes 250 contacts, 500 emails per month, 250 emails per day, one audience and one seat.

Infobip SMS API is another paid API option with pay-as-you-go rates that depend on country and network, and volume discounts for large campaigns.

MoceanAPI is an alternative for teams comparing SMS APIs with destination-dependent pay-as-you-go rates or a U.S./Canada toll-free number plan.

Vonage SMS API is another usage-based API option, with pricing varying by country and number type.

Messente offers SMS, WhatsApp and Viber access with dashboard and API access, so it may suit teams seeking those channels together.

Verdict

Choose ClickSend if your business needs programmable SMS, workflow flexibility and two-way messaging backed by tracking tools. Its SDK and integration breadth is the clearest reason to choose it; the strongest reasons to look elsewhere are the minimum top-ups and URL approval hurdle for new customers.

Verdict

ClickSend combines SMS API functions with browser access, automation options, and two-way messaging. Budget for carrier fees and multipart messages, and note the URL approval restriction for new customers.

Where Specifiction places it

Alternatives to ClickSend SMS APIAll alternatives →