What is Twilio?
Twilio is a cloud communications platform that gives businesses programmable APIs for sending and receiving SMS, MMS, WhatsApp messages, voice calls and email. Instead of a ready-made marketing dashboard, it offers building blocks that developers wire into their own apps, websites and backend systems. Marketing teams use it for text campaigns, order alerts, appointment reminders and two-way WhatsApp chats, while product teams use it for login codes and support calls.
Founded in 2008, Twilio now spans several product lines, including Programmable Messaging, the Conversations API, Verify for authentication, Flex for contact centers, the Segment customer data platform and the SendGrid email API. Pricing is pay-as-you-go per message or per minute, so costs scale with usage. Twilio suits companies that have developer resources and want full control over how messages are triggered and personalized.
Twilio at a glance
How does Twilio work?
- Create an account and get a number
Sign up for a free trial, then lease a long code, toll-free number or short code, or register a WhatsApp sender through Twilio's setup flow.
- Complete registration and compliance
Register your brand and use case for US texting, verify your business for WhatsApp and get message templates approved by Meta.
- Send messages through the API
Developers call the REST API or use client libraries in languages such as Python, JavaScript, Java and PHP to send messages from your own systems.
- Handle replies and events
Webhooks pass inbound messages and delivery statuses back to your app, so you can route replies, trigger bots or update a CRM.
- Monitor usage and costs
Track delivery, errors and spend in the console, and add tools like link shortening or scheduling as volume grows.
Twilio key features
Programmable Messaging API
Send one-way alerts and marketing texts over SMS, MMS, WhatsApp and RCS from a single API.
Conversations API
Build two-way chat threads for sales and support that keep context across channels.
WhatsApp Business Platform access
Twilio helps with WhatsApp account creation, business verification, templates, Flows and WhatsApp Business Calling.
Engagement Suite
Adds link shortening with click tracking and message scheduling to outbound texts for a per-message fee.
Verify
A ready-made service for one-time passcodes and phone verification across SMS, WhatsApp and voice.
Segment customer data platform
Collects customer events from apps and websites so messages can be personalized and triggered by behavior.
SendGrid Email API
Twilio's email service for transactional and marketing email, available alongside its messaging products.
Why use Twilio?
- One vendor covers SMS, WhatsApp, voice, email and verification, which reduces the number of contracts to manage.
- Pay-as-you-go pricing means you pay only for the messages you send, with no long-term contract.
- The API approach lets developers trigger messages from any event in your product, store or CRM.
- Global reach across 180+ countries and territories helps brands that message customers abroad.
- Extensive documentation and code samples shorten the time it takes a developer to ship a working integration.
Who is Twilio best for?
A good fit for
- SaaS companies and apps with in-house developers
- Ecommerce brands that need order alerts, delivery updates and two-way texting
- Businesses sending login codes and verification messages
- Larger teams building custom SMS and WhatsApp workflows at scale
Less suited to
- Small businesses without technical help, since there is no simple drag-and-drop campaign builder in the core product
- Marketers who want flat monthly pricing, because carrier and Meta fees make costs vary
- Teams that just need a shared WhatsApp inbox out of the box
Twilio pricing
| Pricing model | Usage-based |
|---|---|
| Free plan | No |
| Free trial | Free trial, no credit card required |
| Starting price | $0.0083 per US SMS segment, plus carrier fees |
US numbers cost $1.15/month for a long code and $2.15/month for toll-free. WhatsApp messages carry a $0.005 Twilio fee plus Meta's per-message charge, and volume discounts apply as usage grows.
Prices checked October 2026. Vendors change plans often, so confirm on the official Twilio pricing page before you buy.
Twilio pros and cons
Pros
- Covers SMS, WhatsApp, voice and email from one provider
- Flexible APIs and strong developer documentation
- Transparent per-message pricing with no contract
- Global coverage and automatic volume discounts
Cons
- Requires developer work for most marketing use cases
- Total cost is harder to predict because of carrier, Meta and add-on fees
- US texting requires registration and compliance steps before sending
Twilio integrations and platforms
Available on
Twilio alternatives
See the full shortlist in Best SMS Marketing Platforms.
Twilio FAQ
Is Twilio free?
Twilio offers a free trial with no credit card required, but it is not free for ongoing use. After the trial, you pay per message or per minute. A US SMS segment costs $0.0083 plus carrier fees, and phone numbers carry a monthly fee, such as $1.15 for a long code.
What is Twilio used for?
Twilio is used to add messaging, calling and email to apps and business systems. Common uses include SMS marketing, order and delivery notifications, appointment reminders, two-way WhatsApp support, one-time passcodes through Verify and contact center calls through Flex. Developers connect these features through Twilio's APIs.
Does Twilio support WhatsApp marketing?
Yes. Twilio provides access to the WhatsApp Business Platform through its Messaging and Conversations APIs. It helps with business verification and template approval. Each WhatsApp message carries a $0.005 Twilio fee plus Meta's fee, which depends on the message category and country.
Twilio vs WATI: what's the difference?
Twilio is an API-first platform for developers who want to build custom messaging across SMS, WhatsApp, voice and email. WATI is a no-code WhatsApp tool with a shared team inbox, chatbots and broadcasts ready to use. Twilio offers more flexibility, while WATI is easier for non-technical marketing and support teams.
Is Twilio good for beginners?
Twilio is approachable for beginner developers thanks to its tutorials and code samples, but it is less suited to non-technical marketers. Most features require writing code or using a third-party tool built on Twilio. Small teams without developers often prefer a no-code SMS or WhatsApp platform.
Sources
This overview is based on Twilio's official website and documentation, checked October 2026.