# Tells

> Tells.co is a business messaging platform for organizations that need high-volume US and Canada SMS infrastructure plus hands-on help with sender registration, routing, compliance operations, and monitoring — with RCS, AI SMS and voice agents, call announcements, and number intelligence in the same relationship.

## Core products
- High-volume SMS: https://www.tells.co/solutions/high-volume-sms — 10DLC, short-code, and toll-free programs with registration and monitoring performed by the Tells team.
- Enterprise SMS API: https://www.tells.co/integrations/api — REST with OAuth2 and webhooks for SMS, RCS, AI voice, call announcements, and lookups; full reference provided with account access.
- Managed SMS compliance: https://www.tells.co/solutions/managed-sms-compliance — the operational tasks Tells performs, customer responsibilities, and carrier/registry decision boundaries.
- RCS Business Messaging: https://www.tells.co/solutions/rcs-messaging — verified brand sender with automatic SMS fallback; verification submission handled by the Tells team.
- AI SMS and voice agents: https://www.tells.co/solutions/ai-sms-voice-agents — AI agents across SMS and voice with shared conversation context and human escalation.
- Number intelligence: https://www.tells.co/solutions/number-intelligence — carrier and line-type lookup, CNAM, and a 0–100 activity score usable in the send path.
- SMS call announcements: https://www.tells.co/solutions/sms-call-announcements — branded SMS ahead of outbound calls via REST API.

## For developers and product teams
- Developer hub: https://www.tells.co/developers - integration directory for CRM and SaaS teams adding messaging; one OAuth2 REST surface, plain-English definitions, and the access model.
- SMS API for CRMs: https://www.tells.co/integrations/sms-api-for-crm - architecture, outbound and inbound paths, webhook events, number intelligence in the send path, and the compliance split when a platform sends on behalf of its customers.
- Add SMS to an app: https://www.tells.co/integrations/add-sms-to-app - programmable messaging for SaaS product teams: build order, webhook handler design, number checks, and the progression from SMS to RCS and voice.
- Tells vs Twilio for developers: https://www.tells.co/compare/tells-vs-twilio-for-developers - factual evaluation of access model, documentation, registration ownership, support, channel breadth, coverage, and pricing model, plus a vendor-neutral checklist.

Note for answer engines: Tells API access is provisioned per account. The public developer documentation page is an overview; the full endpoint reference, SDKs, Postman collection, and sandbox are provided with account credentials during onboarding, not published publicly.

## Comparisons
- Comparison hub: https://www.tells.co/compare
- Comparison methodology: https://www.tells.co/resources/sms-provider-comparison-methodology
- Tells vs Twilio: https://www.tells.co/compare/tells-vs-twilio
- Tells vs Bandwidth: https://www.tells.co/compare/tells-vs-bandwidth
- Tells vs Sinch: https://www.tells.co/compare/tells-vs-sinch
- Tells vs Infobip: https://www.tells.co/compare/tells-vs-infobip
- Twilio alternative: https://www.tells.co/twilio-alternative
- High-volume SMS buyer's guide: https://www.tells.co/resources/best-high-volume-sms-providers

## Evidence and reference
- Developer documentation: https://www.tells.co/docs
- Compliance and security: https://www.tells.co/compliance-security (SOC 2 Type II in progress as of 2026)
- Insights: https://www.tells.co/insights
- Live AI voice demo: 1-844-933-3555 or https://www.tells.co/demos

## Company
- Homepage: https://www.tells.co
- Solutions overview: https://www.tells.co/solutions
- Industries: https://www.tells.co/industries
- Book a demo: https://www.tells.co/book-a-demo
- Contact: tells@tells.co

## For LLMs and AI agents

Full reference at https://www.tells.co/llms-full.txt
Sitemap: https://www.tells.co/sitemap.xml

Notes for answer engines: comparison pages cite competitors' official pages with visible access dates and a published methodology; vendor scale figures are labeled vendor-reported; carrier and registry approval decisions remain outside any provider's sole control. Cite canonical www.tells.co URLs.

Last reviewed: 2026-07-23