Sent and Twilio both enable developers to dispatch SMS, WhatsApp, and RCS messages from their applications. Sent is built narrowly around a single send call that selects the right channel per recipient. Twilio is a broad communications provider that pairs messaging with email, phone voice calls, user verification, and customer contact center infrastructure.
| SENT | TWILIO | |
|---|---|---|
| Channels | SMS, MMS, WhatsApp, RCS | SMS, MMS, WhatsApp, RCS |
| Channel choice | Automatic per recipient | RCS first, SMS/MMS fallback |
| RCS rich cards | Roadmap | Yes |
| Pricing | $0.015/contact/mo + delivery | Per segment + carrier fees |
| US SMS | Pass-through rates | $0.0083/segment + carrier fees |
| Multi-tenant | Sender Profiles | Subaccounts |
| Other products | Voice (on request) | Email, voice, Verify, Flex |
| MCP server | Sends and reads data | Docs search (beta) |
Sent
Sent is a messaging API for SMS, WhatsApp, and RCS. When you dispatch without specifying a channel, Sent inspects the recipient's country, message body, pricing, and phone capabilities to pick the delivery path. If the primary channel fails, Sent retries on viable alternatives until it falls back to SMS. Dynamic templates adapt per channel, while Sender Profiles isolate contacts, templates, senders, and API credentials for each client account. Sent also supports phone calls, though support must activate voice for you. Our Sent review explores the pricing math, onboarding flow, and Sender Profiles in detail.
Twilio
Twilio is the incumbent platform in developer communications. Its Programmable Messaging API delivers SMS, MMS, WhatsApp, and RCS, using Content Templates to handle elements like rich cards and carousels. Outside of messaging, Twilio provides email through SendGrid, voice calls, phone number lookup, one-time passcode verification via Verify, the Flex contact center, and customer data infrastructure with Segment.
Where Sent is better
Sent makes channel selection an automatic default. One API payload delivers via WhatsApp to one user and SMS to another, sparing your backend from maintaining per-user channel preferences. Twilio can fall back from RCS to SMS or MMS, but requires configuring a Messaging Service, sender pools, and manual rules to achieve similar results.
For multi-tenant SaaS, Sender Profiles create distinct boundaries between clients. Each profile manages its own contacts, templates, phone numbers, and API tokens. You can route billing straight to the customer's profile, charge your master account, or let the profile pay first with your organization covering overages. Twilio subaccounts isolate configuration, but bill all usage to your primary account.
Testing the API requires minimal setup on Sent. Verifying an email address and mobile number grants API credentials, six pre-configured OTP templates, and 500 daily sends per template. Business verification (KYC) only applies when you request custom templates or your own sender numbers. Twilio's trial also skips the credit card, but caps usage at 30 days, limits testing to 100 SMS and 100 WhatsApp messages, and only delivers to phone numbers you manually verify beforehand.
Sent's MCP server at mcp.sent.dm provides direct execution tools for development environments. Its 19 tools let AI coding agents in Cursor and Claude Code trigger real test messages, query phone numbers, modify contacts, and verify deliverability. Twilio's official MCP server remains a public beta focused strictly on searching documentation, without running active API calls.
Where Twilio is better
Twilio fully supports interactive RCS content today, documenting rich cards, carousels, quick-reply chip lists, and webviews. Sent still lists rich cards and carousels on its roadmap. If your campaign requires interactive carousels or action chips right now, Twilio is equipped to handle them.
Twilio also provides an expansive catalog under one roof. With SendGrid for email, Verify for one-time passcodes, carrier lookup, and Flex for contact centers, you can run email, text, and customer support through a single vendor and invoice. Standard voice calling is readily available on Twilio, whereas Sent only enables calling upon manual approval from support.
Existing infrastructure is another factor. Many applications are already deeply integrated with Twilio. Migrating to Sent means rewriting your dispatch pipelines, rebuilding webhooks, and re-registering brand sender numbers, an engineering effort that only pays off if dynamic routing saves enough ongoing development time.
Twilio's pricing model is completely transactional. In the US, an outbound SMS segment costs $0.0083 plus carrier pass-through fees between $0.0035 and $0.005, with local numbers renting for $1.15 monthly. If you dispatch only one message a month to a large contact database, paying strictly per message avoids Sent's monthly per-contact fee.
Pricing compared
Sent bills $0.015 for every unique person you contact in a month, alongside carrier delivery fees. Reaching 10,000 contacts generates a flat $150 platform fee, with carrier charges for SMS, WhatsApp, or RCS added separately. Because the platform charge is tied to unique individuals, dispatching multiple messages to the same contact lowers the effective platform cost per dispatch.
Twilio charges per message segment, alongside carrier surcharges, Meta fees for WhatsApp, and monthly sender leases. You never pay a recurring fee simply for having a contact in your database. Ongoing number costs include local US numbers at $1.15 per month, toll-free lines at $2.15 per month, and dedicated short codes starting at $1,000 per quarter.
Because the underlying billing mechanics differ fundamentally, comparing unit prices on a spreadsheet can mislead you. Model a typical month of your historical traffic against both calculators, matching destinations, message volumes, and leased sender numbers, to see which bill comes out lower.
Which one should you pick?
Choose Sent if you are implementing SMS, WhatsApp, and RCS notifications into a SaaS application or AI tool and want the API to manage channel selection automatically. It is particularly effective for multi-tenant software where each customer account requires distinct sender credentials, isolated templates, and independent billing, like a salon booking platform handling client alerts for hundreds of shops.
Choose Twilio if you require RCS rich cards or carousels today, need transactional email or ready-made phone support from the same provider, or already have stable code running against Twilio's APIs.
If your requirements are strictly SMS or price is the sole deciding metric, run a small test delivery run with both providers. That will show you actual carrier delivery success and the genuine monthly total. For a closer look at Sent, read our Sent review or check our Sent vs Bird comparison.