messages.dev vs Telnyx

Compare messages.dev and Telnyx side by side: iMessage features, channels, developer tools, pricing and compliance, checked on each provider's own site.

messages.dev

TypeScript-first iMessage, RCS and SMS API
Starting price
$99/month per line
Free plan
Sandbox: 50 messages a day to your own paired phone

Telnyx

Low per-part SMS pricing with carrier fees at cost
Starting price
$0.004 per US SMS part plus carrier fee
Free plan
Trial account with $5 testing credit

messages.dev supports 30 of the 77 features compared here, and Telnyx supports 36.

Feature comparison

Featuremessages.devTelnyx
iMessage messaging
iMessage
Supported
Not supportedNo iMessage support
Group chats
SupportedSend into existing groups once someone in them has messaged; receive group messages.
Not supported
Group management
Not supportedDocs say Apple does not let third-party software create groups; no member endpoints.
Not supported
Group name and photo
Not listed
Not supported
Mentions
Not listed
Not supported
Tapbacks
SupportedSix tapbacks; reaction.added and reaction.removed webhooks.
Not supported
Threaded replies
Supportedreply_to with a message ID or GUID.
Not supported
Typing indicators
SupportedSending works; inbound typing events are not delivered yet.
Not supported
Read receipts
PartialYou can mark chats read; inbound read receipts are not delivered yet.
Not supported
Edit and unsend
Not listedNot in the endpoint list in llms.txt.
Not supported
Message effects
Not listed
Not supported
Animated text effects
Not listed
Not supported
Stickers
Not listed
Not supported
Formatted text
Not listed
Not supported
Attachments
SupportedOne uploaded file per message.
Not supported
Live Photos
Not listed
Not supported
Rich link previews
Not listed
Not supported
Voice messages
SupportedNative waveform voice messages; inbound memos include Apple's transcription.
Not supported
Contact cards
SupportedSDK helper builds the vCard, photo included.
Not supported
Polls
Not listed
Not supported
Chat backgrounds
Not listed
Not supported
Location sharing
Not listed
Not supported
iMessage apps
Not listed
Not supported
Live app cards
Not listed
Not supported
Sender name and photo
Not listed
Not supported
FaceTime calls
Not listed
Not supported
Delivery status
PartialOutbox status pending, claimed, sent or failed; no separate delivered or read state.
Not supported
iMessage availability check
Not listed
Not supported
Focus and Notify Anyway
Not listed
Not supported
Numbers and delivery
Managed lines
SupportedTerms say messages.dev runs the Mac hardware, Apple IDs and carrier links for each line.
Not supportedNo iMessage support
Dedicated numbers
Supported$99/mo per line with a dedicated number.
SupportedLocal, national, toll-free and short code numbers in 130+ countries
Shared numbers
SupportedShared sandbox line, 50 messages a day, only to your own paired phone.
Not listed
Bring your own number
Not listed
SupportedHosted SMS text-enables numbers whose voice stays with another provider
Line pooling
PartialMultiple lines supported, but you choose the line per user in your own code.
SupportedNumber Pool spreads sends across long code and toll-free numbers, with Sticky Sender
SMS fallback
Not listedLines can be iMessage, SMS or auto; fallback behaviour is not documented.
Not supportedNo iMessage support; RCS can fall back to SMS or MMS
RCS fallback
Not listed
Not supportedNo iMessage support
Outbound-first messaging
Not supportedContact-first: the recipient must message your line before you can send.
SupportedBusiness-initiated SMS; US A2P traffic needs 10DLC or toll-free verification
Calls on the iMessage number
Not listed
Not supportedNo iMessage support
Other channels
SMS
SupportedSMS lines use the same endpoints; audio messages are iMessage only.
SupportedSMS and MMS on long code, toll-free, short code and alphanumeric senders
RCS
Not listedHomepage and terms mention RCS; the API docs do not document it.
SupportedRCS Business Messaging with agent registration by API
WhatsApp
Not supportedNot offered
SupportedWhatsApp Business API, including coexistence and business calling
Telegram
Not supported
Not supportedNot offered
Slack
Not supported
Not supported
Email
Not supported
SupportedEmail API with sending and inboxes, generally available since August 2026
Phone calls
Not supported
SupportedVoice API, TeXML and SIP trunking
Apple Messages for Business
Not supported
Not supportedNot offered
Unified channel API
SupportediMessage and SMS lines share the same endpoints.
PartialShared messaging profiles, but SMS, RCS, WhatsApp and email each have their own endpoint and payload
Developer tools
REST API
Supported
SupportedREST API v2 with a public OpenAPI spec
TypeScript SDK
Supported@messages-dev/sdk, MIT.
Supported
Python SDK
Not supportedOnly a TypeScript SDK; docs point other languages to the REST API.
Supported
Other SDKs
Not supported
SupportedGo, Java, Ruby and PHP; a .NET SDK is on GitHub
CLI
Supportedmessages-dev CLI: send, list, manage webhooks and stream events.
SupportedTelnyx CLI, plus an Agent CLI with setup commands
Webhooks
Supportedmessage.received, message.sent, reaction.added and reaction.removed.
Supported
Signed webhooks
SupportedHMAC-SHA256 over timestamp and raw body, 5-minute replay window.
SupportedEd25519 signatures over timestamp and payload
MCP server
Not listed
SupportedRemote MCP server for API actions, plus a docs MCP server
Open source
PartialTypeScript SDK and CLI are MIT on GitHub; the service is closed.
Not supportedClosed platform; SDKs and CLI are MIT-licensed
Self-hosting
Not listed
Not listed
Local testing
PartialSDK builds signed test webhook deliveries; real messaging still needs your phone.
PartialOnly for Telnyx AI Assistants, through the Assistant Chat API or web chat widget
Custom channel providers
Not listed
Not listed
Event replay
Not listed
SupportedWebhook Deliveries API lists failed deliveries with the original payload; 3 retries plus failover URL
OpenTelemetry
Not listed
PartialEdge Compute functions, which host Agent SDK agents, export logs over OTLP
No-code integrations
Not listed
SupportedZapier
CRM integrations
Not listed
SupportedAI Assistants connect to Salesforce, HubSpot, Pipedrive and Zoho CRM
Built for AI agents
Agent framework
Not listed
SupportedAI Assistants run conversations over calls, SMS, WhatsApp and web chat; Agent SDK in beta
Agent framework integrations
Not listed
SupportedVercel AI SDK provider, Vercel Chat SDK adapter, LiveKit Agents plugin, LangGraph via Agent SDK (beta)
Streaming replies
Not listed
PartialAssistant Chat API and web chat stream replies as SSE; SMS, RCS and WhatsApp replies are not streamed
Agent group chats
Not listed
PartialGroup MMS with up to 8 recipients (US and Canada) that an agent number can join
Human handoff
Not listed
PartialVoice AI Assistants can warm-transfer calls to a person; no agent inbox for text
Audit logs
Not listed
SupportedAudit Logs API for account changes
Message history API
SupportedCursor-paginated chats and messages per line.
SupportedRetrieve messages by ID and search message detail records
Plans and compliance
Free plan
SupportedSandbox: 50 messages a day to your own paired phone.
PartialTrial with $5 credit; SMS only to one verified number, 100 a day
Public pricing
Supported
Supported
No per-message fees
Supported$99/mo per line with unlimited messages.
Not supportedBilled per message part, plus carrier fees
Uptime SLA
PartialCustom SLAs on Enterprise only; terms say no formal uptime SLA at launch.
SupportedCustom SLA on committed and Enterprise plans; Telnyx lists 99.99% for core voice and messaging
Isolated infrastructure
SupportedDedicated infrastructure on the Enterprise plan
SupportedDedicated infrastructure on the Enterprise plan ($5,000 a month minimum)
SOC 2 Type II
Not supportedSite footer lists SOC 2 as in progress.
Supported
GDPR
SupportedSite says GDPR compliant; a DPA is available on request.
Supported

Checked on each provider's own site and docs on 2026-10-25. “Not listed” means the provider does not mention it.

Pricing

messages.dev

The sandbox is free for 50 messages a day; a production line is $99 a month with unlimited messages, and Enterprise is custom.

Pricing model: flat per line, no per-message fees

Source

Telnyx

Pay as you go per message part, with carrier fees passed through at cost and no platform fee.

Pricing model: per message

Source

Which should you choose?

Choose messages.dev if you need iMessage, group chats, tapbacks and threaded replies.

Choose Telnyx if you need bring your own number, outbound-first messaging, RCS and WhatsApp.

Frequently asked questions