Twilio
Cloud APIs for SMS, voice, WhatsApp, email and phone verification, billed by usage.
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About Twilio
Twilio is the best-known communication platform for developers. Instead of buying phone lines or SMS gateways, a team calls Twilio's APIs to send and receive text messages, RCS and WhatsApp messages, make and route voice calls, verify users with one-time codes, and look up phone numbers. It also owns SendGrid for email, the Flex contact-center platform and the Segment customer data platform, and has added voice AI and conversation-memory products for building AI agents. Developers use it for appointment reminders, login codes, delivery alerts, call centers and support lines. Pricing is pay-as-you-go per message or per minute, with volume discounts and a free trial that needs no credit card; costs vary a lot by country and carrier fees. It is a hosted service used through REST APIs and SDKs for most languages, with a web console. The breadth of features is its strength, but at high volume teams often compare it with cheaper carriers such as Telnyx or Plivo.
Best for: Developers adding SMS, calls, WhatsApp or 2FA codes to an app who want the widest set of features.
Pros and cons
What works
- Covers SMS, voice, WhatsApp, RCS, verification and email in one account
- Pay as you go with no contract
- Free trial with no credit card
- Mature docs and SDKs for most languages
Why people leave
- Per-message rates are higher than some carrier-owned rivals
- Carrier fees and US 10DLC registration add cost and setup work
- The product range is large and can be hard to navigate
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Twilio: common questions
Is Twilio free?
No, Twilio is a paid product. SMS price: From $0.0083 per message (checked on Twilio's own site).
Is Twilio open source?
No, Twilio is not open source.
What platforms does Twilio run on?
Twilio is available for Web.