# Your next SMS answer is here. Start with a plain-language answer, follow a setup guide or investigate a delivery result. Find the right path through SMS products, developer documentation, explained articles and tools. [Browse SMS FAQs](/products/sms/faqs) [Open the complete SMS guide](/docs/guides/sms/overview) [Workflows](#workflows) [Integration](#setup) [SMS explained](#explained) [Content and segments](#content) [Delivery and replies](#operations) [Senders and consent](#senders) [Migration](#migration) [Pricing and fit](#commercial) ## Choose the right SMS workflow Start with the job you want to complete. - [Send from an application](/products/sms/sending): Build notifications and updates from a product event. - [Run an audience campaign](/products/sms/marketing): Connect contacts, content, consent and campaign progress. - [Receive and act on replies](/products/sms/two-way): Connect inbound SMS to a service or conversation. - [Verify a phone number](/products/verify): Use a managed verification workflow for one-time codes. ## Build and test the integration Understand the sender and destination before your first send. - [SMS overview](/docs/guides/sms/overview): Find the complete sending and receiving guide. - [Send SMS](/docs/guides/sms/sending-sms): Build the request, configure the destination and test delivery outcomes. - [Choose and register a sender](/docs/guides/sms/senders): Understand sender identity and per-country requirements. - [Use a system template](/docs/guides/sms/templates): Send with a built-in template and its required variables. - [Connect an AI agent](/docs/ai/set-up-your-agent): Set up the CLI or MCP for your agent. - [Verify and consume webhooks](/docs/guides/webhooks): Handle signatures, retries and event identity. ## SMS, explained Plain-language answers before implementation details. - [SMS API or SMS gateway?](/explained/sms/what-is-an-sms-api-vs-an-sms-gateway): Understand the terms behind a sending integration. - [What is bulk SMS?](/explained/sms/what-is-bulk-sms): Distinguish an audience send from individual messages. - [One-way or two-way?](/explained/sms/what-is-the-difference-between-one-way-and-two-way-sms): Choose whether recipients need a reply path. - [Which sender type should I use?](/explained/sms/which-sms-sender-type-should-i-use): Compare the identities people see on their phones. - [Explore all SMS answers](/explained/sms): Browse the complete library of durable SMS explanations. - [Product FAQs](/products/sms/faqs): Find answers grouped by the capability you are evaluating. ## Prepare the message Make encoding and segmentation a visible part of the review. - [Create campaign content](/products/sms/marketing/templates): Draft, personalize and review reusable messages. - [Character limits](/docs/guides/sms/character-limits): Read the limits for GSM-7 and Unicode messages. - [Smart encoding](/docs/guides/sms/smart-encoding): Understand substitutions and preservation of original text. - [SMS segment calculator](/tools/sms-segment-calculator): Inspect a draft’s encoding and segment boundaries. - [What is an SMS segment?](/explained/sms/what-is-an-sms-segment): See why a single visible text can contain several billable parts. - [Multipart messages](/explained/sms/what-is-a-concatenated-sms): Understand how several segments become one text on a phone. ## Investigate delivery and replies Move between aggregate performance and an individual message. - [SMS message log](/docs/guides/sms/sms-log): Inspect status, sender, recipient, segments and timeline. - [SMS event catalogue](/docs/guides/sms/events): Understand accepted, sent, delivered, rejected and received events. - [Dashboard metrics](/docs/guides/sms/tracking-and-metrics): Read delivery rates, failures and latency with their definitions. - [SMS Stats API](/docs/guides/sms/stats-api): Query counts, dimensions and time buckets. - [What does a receipt prove?](/explained/sms/what-is-a-delivery-receipt): Understand a carrier delivery report and its limits. - [Investigate carrier filtering](/explained/sms/why-are-my-sms-messages-being-filtered-by-carriers): Review sender, content and sending patterns when delivery fails. ## Numbers, destinations and consent Prepare the identity, market and customer permission together. - [Numbers and sender IDs](/products/sms/numbers): Compare sender choices for different uses. - [Destination catalogue](/products/sms/destinations): Check sender support and requirements by country. - [US 10DLC registration](/docs/guides/sms/10dlc): Register a brand and campaign for US long-code messaging. - [Opt-outs and keywords](/docs/guides/sms/opt-outs-and-keywords): Read coverage, automatic replies and suppression behavior. - [Campaign review controls](/products/sms/marketing/compliance): Connect consent, registration and current eligibility. - [SMS pumping](/explained/sms/what-is-sms-pumping): Recognize abuse that can drive unwanted messaging traffic. ## Move an existing SMS integration Keep your application’s intent while changing the provider. - [SMS migration overview](/docs/guides/sms/migrate): Plan the differences in authentication, senders and event handling. - [Migrate from Twilio](/docs/guides/sms/migrate/twilio): Map sending and delivery events to Bird. - [Migrate from Sinch](/docs/guides/sms/migrate/sinch): Review send and batch differences. - [Migrate from Telnyx](/docs/guides/sms/migrate/telnyx): Adapt sender and webhook integration. - [Migrate from Infobip](/docs/guides/sms/migrate/infobip): Move sending and outcome handling. - [Migrate from Plivo](/docs/guides/sms/migrate/plivo): Map your application’s message workflow. - [Migrate from Bandwidth](/docs/guides/sms/migrate/bandwidth): Review API and event changes. - [Move from the Connectivity Platform](/docs/guides/sms/migrate/connectivity-platform): Follow the path from the earlier MessageBird integration. ## Evaluate the fit Connect the technical decision to destinations, cost and rollout. - [SMS pricing](/pricing/sms): Read published rates and the destination factors that affect cost. - [Compare SMS providers](/products/sms/compare): Evaluate the capabilities your integration requires. - [Getting started](/products/sms/getting-started): Follow the setup sequence for an initial integration. - [Campaigns and broadcasts](/products/sms/marketing/campaigns): Choose the workflow for a coordinated audience send. ## Turn the answer into a working integration. Create a workspace and prepare your sender, destination and first test. For a campaign or a more complex rollout, bring your requirements to an SMS specialist. [Start building with SMS](/dashboard/signup?returnTo=%2Fdashboard%2Fw%2Fsms%2Fonboarding) [Talk through your SMS use case](/demo?product=sms) ## Related resources - [Build your first integration](/learn/paths/integration) (course) - [Explore the SMS platform](/products/sms) (product)