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Telnyx SMS API

telnyx.com

From $500/mo Free plan WebAPI
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Spec score 9.0 #1 of 35 in SMS API services

Spec sheet

Free plan
NoRead 24 Sep 2026 · telnyx.com
Support
Telnyx advertises free 24/7 expert support for the SMS API.Read 2 Oct 2026 · telnyx.com
Headquarters
Chicago, Illinois, United StatesRead 23 Sep 2026 · telnyx.com
Founded
2009Read 23 Sep 2026 · telnyx.com
Account limit
Level 1 verified accounts are limited to 50 outbound messages per day.Read 2 Oct 2026 · support.telnyx.com
AI coding tools
Agent Skills support Claude Code, Cursor, and Windsurf integrations.Read 28 Sep 2026 · telnyx.com
Automatic opt-outs
STOP-word replies automatically unsubscribe recipients from future sends.Read 28 Sep 2026 · telnyx.com
Company history
Telnyx was founded in 2009 and is based in Austin, Texas, with offices in Denver, Dublin and Amsterdam.Read 2 Oct 2026 · support.telnyx.com
Core function
Telnyx SMS API lets developers send and receive SMS or MMS globally.Read 2 Oct 2026 · telnyx.com
Delivery reporting
The API includes detailed delivery reports and a debugging tool for deliverability analysis.Read 2 Oct 2026 · telnyx.com
Developer APIs
The service provides REST APIs, comprehensive documentation, and SDKs.Read 28 Sep 2026 · telnyx.com
Developer support
Telnyx provides REST APIs, documentation and SDKs for Python, JavaScript, Go, Java and Ruby.Read 2 Oct 2026 · telnyx.com
Free support
The pricing page lists $0 support, and the product page states 24/7 free support.Read 28 Sep 2026 · telnyx.com
Free tier limits
The page shows free signup and $0 platform fee, but does not state a message allowance.Read 28 Sep 2026 · telnyx.com
Global coverage
Telnyx advertises phone numbers in more than 130 countries.Read 2 Oct 2026 · telnyx.com
Hosted SMS
Existing numbers can send and receive SMS and MMS without changing providers.Read 28 Sep 2026 · telnyx.com
Inbound webhooks
YesRead 24 Sep 2026 · telnyx.com
Long messages
The API automatically separates SMS messages that are too long for the destination into multiple messages.Read 2 Oct 2026 · telnyx.com
Message concatenation
Long SMS messages are automatically separated into multiple messages.Read 28 Sep 2026 · telnyx.com
Message optimization
Automated message queuing is set according to account limits and industry standards to manage throughput and compliance.Read 2 Oct 2026 · telnyx.com
Messaging channels
Supported sender channels include 10DLC, toll-free, short code, and alphanumeric sender ID.Read 28 Sep 2026 · telnyx.com
MMS support
YesRead 24 Sep 2026 · telnyx.com
Monthly message volume
Telnyx reports more than 1.3 billion messages sent and received monthly.Read 28 Sep 2026 · telnyx.com
Opt-outs
Telnyx automatically unsubscribes recipients who reply with stop words such as STOP.Read 2 Oct 2026 · telnyx.com
Platform fee
The pricing page lists a $0 platform fee.Read 28 Sep 2026 · telnyx.com
Pretrial restriction
Pretrial accounts are limited to Telnyx AI products, while Messaging requires a full account.Read 2 Oct 2026 · support.telnyx.com
Related integrations
The SMS API page links to Telnyx RCS, WhatsApp API, Verify API and Phone Numbers products for messaging and verification workflows.Read 2 Oct 2026 · telnyx.com
Retrieval limit
The retrieve-message endpoint only retrieves messages no older than 10 days.Read 28 Sep 2026 · telnyx.com
SDK languages
SDKs are available in Python, JavaScript, Go, Java, and Ruby.Read 28 Sep 2026 · telnyx.com
Security certifications
Telnyx lists ISO 27001:2022, SOC 2 Type II, ISO 27701:2019, PCI DSS and GDPR compliance or certification.Read 2 Oct 2026 · telnyx.com
Security controls
Telnyx states that customer data is encrypted in transit and at rest, with multi-factor authentication and granular API-key permissions.Read 2 Oct 2026 · telnyx.com
Sender types
The API supports 10DLC, toll-free, short code and alphanumeric sender ID channels.Read 2 Oct 2026 · telnyx.com
Short code support
YesRead 24 Sep 2026 · telnyx.com
Starting rate
SMS pricing starts at $0.004 per message part.Read 28 Sep 2026 · telnyx.com
Toll-free numbers
YesRead 24 Sep 2026 · telnyx.com
Trial refund
The page does not state trial terms or a refund policy.Read 28 Sep 2026 · telnyx.com
Two-way SMS
YesRead 24 Sep 2026 · telnyx.com
Usage pricing
Usage-based pricing has no hidden fees, third-party markups, or upfront investment.Read 28 Sep 2026 · telnyx.com
Volume discounts
Automatic volume discounts apply after specified monthly message thresholds.Read 28 Sep 2026 · telnyx.com

Plans and prices

SMS API usage Free Carrier fees may also apply Programmable SMS messaging · Inbound and outbound messaging Published pay-as-you-go rates before volume tiers; carrier passthrough and taxes vary by destination Read 28 Sep 2026 · telnyx.com
SMS API pay as you go Free per message part + carrier fee Automatic discounts above 100M messages/month · $0 platform fee Read 2 Oct 2026 · telnyx.com
Pay as you go Free standard rates Card on file; automatic tier discounts; no contract needed Read 28 Sep 2026 · telnyx.com
Committed $500 a month discounted rates across usage Named account manager · priority support · higher limits Discounted rates, named account manager, priority support, and higher limits Read 2 Oct 2026 · telnyx.com
Enterprise $5,000 a month custom enterprise pricing Dedicated infrastructure and IPs · private interconnect · unlimited rate limits Dedicated infrastructure and IPs, private interconnect, in-region GPUs, and unlimited rate limits Read 2 Oct 2026 · telnyx.com

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