Telnyx SMS API

Input—per 1M tokens

Output—per 1M tokens

Context—tokens

WeightsClosed

About

Telnyx SMS API is ranked #2 of 25 in transactional SMS software on Inferse, made by Telnyx SMS API (Chicago, Illinois, United States). It runs on API, Web. There is no free plan. Paid plans start at $500/mo.

Compared on transactional SMS software

Free plan: Notelnyx.com
Paid from: $0.00/motelnyx.com
Two-way SMS: Yestelnyx.com
Inbound webhooks: Yestelnyx.com
MMS support: Yestelnyx.com
Short code support: Yestelnyx.com
Toll-free numbers: Yestelnyx.com
SDK languages: Node.js, Python, Ruby, PHP, .NET, Java, Gotelnyx.com

Facts

Free plan: Notelnyx.com · 24 Sept 2026
Two-way SMS: Yestelnyx.com · 24 Sept 2026
Inbound webhooks: Yestelnyx.com · 24 Sept 2026
MMS support: Yestelnyx.com · 24 Sept 2026
Short code support: Yestelnyx.com · 24 Sept 2026
Toll-free numbers: Yestelnyx.com · 24 Sept 2026
SDK languages: Node.js,Python,Ruby,PHP,.NET,Java,Gotelnyx.com · 24 Sept 2026
Usage pricing: Usage-based pricing has no hidden fees, third-party markups, or upfront investment.telnyx.com · 28 Sept 2026
Starting rate: SMS pricing starts at $0.004 per message part.telnyx.com · 28 Sept 2026
Platform fee: The pricing page lists a $0 platform fee.telnyx.com · 28 Sept 2026
Free support: The pricing page lists $0 support, and the product page states 24/7 free support.telnyx.com · 28 Sept 2026
Volume discounts: Automatic volume discounts apply after specified monthly message thresholds.telnyx.com · 28 Sept 2026
Free tier limits: The page shows free signup and $0 platform fee, but does not state a message allowance.telnyx.com · 28 Sept 2026
Trial refund: The page does not state trial terms or a refund policy.telnyx.com · 28 Sept 2026
Messaging channels: Supported sender channels include 10DLC, toll-free, short code, and alphanumeric sender ID.telnyx.com · 28 Sept 2026
Country coverage: Telnyx states that it has numbers in more than 130 countries.telnyx.com · 28 Sept 2026
SDK languages: SDKs are available in Python, JavaScript, Go, Java, and Ruby.telnyx.com · 28 Sept 2026
Developer APIs: The service provides REST APIs, comprehensive documentation, and SDKs.telnyx.com · 28 Sept 2026
Certifications: The page footer lists ISO, PCI, HIPAA, GDPR, and SOC2 Type II.telnyx.com · 28 Sept 2026
Message optimization: The API provides automated queuing, intelligent encoding, and reliable delivery reports.telnyx.com · 28 Sept 2026
Automatic opt-outs: STOP-word replies automatically unsubscribe recipients from future sends.telnyx.com · 28 Sept 2026
Message concatenation: Long SMS messages are automatically separated into multiple messages.telnyx.com · 28 Sept 2026
Hosted SMS: Existing numbers can send and receive SMS and MMS without changing providers.telnyx.com · 28 Sept 2026
AI coding tools: Agent Skills support Claude Code, Cursor, and Windsurf integrations.telnyx.com · 28 Sept 2026
Retrieval limit: The retrieve-message endpoint only retrieves messages no older than 10 days.telnyx.com · 28 Sept 2026
Monthly message volume: Telnyx reports more than 1.3 billion messages sent and received monthly.telnyx.com · 28 Sept 2026
Core function: Telnyx SMS API lets developers send and receive SMS or MMS globally.telnyx.com · 2 Oct 2026
Sender types: The API supports 10DLC, toll-free, short code and alphanumeric sender ID channels.telnyx.com · 2 Oct 2026
Global coverage: Telnyx advertises phone numbers in more than 130 countries.telnyx.com · 2 Oct 2026
Developer support: Telnyx provides REST APIs, documentation and SDKs for Python, JavaScript, Go, Java and Ruby.telnyx.com · 2 Oct 2026
Message optimization: Automated message queuing is set according to account limits and industry standards to manage throughput and compliance.telnyx.com · 2 Oct 2026
Delivery reporting: The API includes detailed delivery reports and a debugging tool for deliverability analysis.telnyx.com · 2 Oct 2026
Opt-outs: Telnyx automatically unsubscribes recipients who reply with stop words such as STOP.telnyx.com · 2 Oct 2026
Long messages: The API automatically separates SMS messages that are too long for the destination into multiple messages.telnyx.com · 2 Oct 2026
Support: Telnyx advertises free 24/7 expert support for the SMS API.telnyx.com · 2 Oct 2026
Related integrations: The SMS API page links to Telnyx RCS, WhatsApp API, Verify API and Phone Numbers products for messaging and verification workflows.telnyx.com · 2 Oct 2026
Security certifications: Telnyx lists ISO 27001:2022, SOC 2 Type II, ISO 27701:2019, PCI DSS and GDPR compliance or certification.telnyx.com · 2 Oct 2026
Security controls: Telnyx states that customer data is encrypted in transit and at rest, with multi-factor authentication and granular API-key permissions.telnyx.com · 2 Oct 2026
Account limit: Level 1 verified accounts are limited to 50 outbound messages per day.support.telnyx.com · 2 Oct 2026
Pretrial restriction: Pretrial accounts are limited to Telnyx AI products, while Messaging requires a full account.support.telnyx.com · 2 Oct 2026
Company history: Telnyx was founded in 2009 and is based in Austin, Texas, with offices in Denver, Dublin and Amsterdam.support.telnyx.com · 2 Oct 2026