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Linq Alternatives with Streaming replies

14 providers support streaming replies: stream an AI reply into a message as it is generated.

Providers with streaming replies

Photon

Open-source agent framework with managed iMessage
Starting price
$25/month (Pro)
Free plan
Free: shared iMessage lines, up to 10 users (2.0 beta: 25 shared iMessage assignments and $100 credit)
SupportedAI output streams into one iMessage bubble, edited in place
Visit PhotonRead more

Zernio

One API for iMessage, SMS, WhatsApp, social DMs and calls
Starting price
$200/month per iMessage sender
Free plan
First 2 connected accounts free; free iMessage sandbox on a shared line
PartialChat SDK adapter streams by editing on Telegram only.
Visit ZernioRead more

AgentPhone

Phone numbers with voice, SMS and iMessage for AI agents
Starting price
$3/month per number plus usage; iMessage from $150/month per line
Free plan
$5 starting credit, no card required
PartialVoice only: NDJSON streamed webhook replies start speech on the first chunk.
Visit AgentPhoneRead more

Twilio

Global CPaaS for SMS, RCS, WhatsApp and voice
Starting price
$0.0083 per US SMS segment
Free plan
30-day free trial, no card, with 100 SMS and 75 voice minutes
PartialVoice only: ConversationRelay speaks LLM text tokens as they stream; SMS update only redacts
Visit TwilioRead more

Orbit by Devotel

Pay-as-you-go CPaaS with AI agents on every channel
Starting price
$0.0075 per US SMS segment
Free plan
Free signup with simulated sandbox sends
PartialStreaming STT, LLM and TTS for voice agents; text streaming not documented
Visit Orbit by DevotelRead more

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
PartialAssistant Chat API and web chat stream replies as SSE; SMS, RCS and WhatsApp replies are not streamed
Visit TelnyxRead more

Vonage

Messages API for SMS, RCS, WhatsApp, Viber and email
Starting price
$0.00860 per US SMS on a long virtual number, plus carrier fees
Free plan
Free credit at signup with no card, and a free Messages API Sandbox capped at 100 messages a month
PartialVoice only: AI speech streamed into calls over WebSockets (e.g. Pipecat); messages can be revoked, not edited
Visit VonageRead more

Infobip

Global CPaaS and Apple Messages for Business provider
Starting price
$0.0075 to $0.0083 per US SMS (indicative)
Free plan
60-day free trial, no card, up to 100 messages per channel to your verified number
BetaVoice only, early access: realtime speech-to-speech AI agents on calls; no text streaming found
Visit InfobipRead more

Caspian

Open-source SDK that puts one agent on every chat channel
Starting price
Free (self-host or sandbox key); hosted paid channels per message
Free plan
Free self-hosting; free sandbox key from the MCP get_started tool
PartialPosts then edits as text arrives; one final post where a channel cannot edit, as on iMessage
Visit CaspianRead more

Sinch

CPaaS with 13 messaging channels in one API
Starting price
$0.0078 per US 10DLC SMS, plus carrier fees
Free plan
Free developer account with an SMS sandbox and test credit
PartialVoice only: Voice Relay speaks TTS text chunks as they arrive; message PATCH edits metadata only
Visit SinchRead more

Bandwidth

Carrier-owned SMS, MMS, RCS and voice APIs
Starting price
$0.004 per outbound US 10DLC SMS
Free plan
Bandwidth Build free trial: 30 days of credits, texts only to your own verified mobile
PartialVoice only: bidirectional media streaming for real-time AI audio; texts are not streamed
Visit BandwidthRead more

Unipile

Unified API for users' own WhatsApp, LinkedIn and email
Starting price
49 EUR/month for up to 10 linked accounts ($55)
Free plan
7-day free trial, no credit card
PartialNo streaming; an edit-message API (WhatsApp, LinkedIn Classic) can update a sent reply in place.
Visit UnipileRead more

AgentCall

Phone numbers, SMS and AI voice calls for AI agents
Starting price
$19.99/month (Pro) plus usage
Free plan
One-time 72-hour trial with one local number, 5 inbound AI minutes and 5 texts; card verification required
PartialVoice only: AI calls run on OpenAI's Realtime voice API. Not documented for SMS.
Visit AgentCallRead more

AgentNumber

US phone numbers with SMS and AI voice for agents
Starting price
$5 per number (one-time)
Free plan
None listed
PartialVoice webhook mode: your streamed chat-completion reply is spoken as it arrives.
Visit AgentNumberRead more

Not supported or not listed

  • Linq
    Not supportedDocs say the Chat SDK adapter buffers streams into one final message.
  • Sendblue
    Not supportedDocs say message editing is not supported via the API.
  • Blooio
    Not listed
  • LoopMessage
    Not listed
  • Chert
    Not listed
  • messages.dev
    Not listed
  • MessageBlue
    Not listed
  • Claw Messenger
    Not listed
  • Texting Blue
    Not listed
  • BlueBubbles
    Not listed
  • Apple Messages for Business
    Not listed
  • Bird
    Not listedNo edit or streaming API for SMS, WhatsApp or Apple Messages found; Realtime pub/sub serves your own app
  • adit
    Not listed
  • AgenticMail
    Not listed
  • AgentLine
    Not listed
  • AgentMessage
    Not listed
  • Apple Messages MCP
    Not listed
  • Artil
    Not listed
  • autoMessage
    Not supportedSends are queued drafts and sent messages cannot be edited by API.
  • Beam
    Not listed
  • beeperbox
    Not listed
  • Bland
    Not listed
  • Blue Reacher
    Not listed
  • Blue Replies
    Not listed
  • BlueSendr
    Not listed
  • Chatbubbles
    Not listed
  • Clerk AI
    Not listed
  • Comms by Osis
    Not listed
  • Crypton.sh Blue Relay
    Not listed
  • Dial
    Not listed
  • imsg (gnufood)
    Not listed
  • GoGHL
    Not listed
  • Hail
    Not listed
  • iBlueText
    Not listed
  • imbridge
    Not listed
  • iMessage Max
    Not listed
  • iMessage Relay
    Not listed
  • imessage-rs
    Not listed
  • imessage-sdk
    Not supportedNative Chat SDK response streaming is postponed in v0.1
  • iMessage Sender
    Not listed
  • Inkbox
    Not listed
  • iSnap
    Not listed
  • Mac Messages MCP
    Not listed
  • mautrix-gmessages
    Not listed
  • mautrix-imessage
    Not listed
  • Miss Blue
    Not listed
  • myCRMSIM
    Not listed
  • OpenClaw imsg
    Not listed
  • OpenMessage
    Not listed
  • Project Blue
    Not listed
  • rustpush
    Not listed
  • Saperly
    Not listed
  • Sendara
    Not listed
  • senderZ
    Not listed
  • SendiMessage
    Not listed
  • Sent
    Not listed
  • SentFromAI
    Not listed
  • Tuco AI
    Not listed
  • Vernacular
    Not listed
  • VoidFix Gateway
    Not listed
  • ZeroSettle
    Not supportedNo message editing, so a reply cannot be streamed into one bubble.
  • Cadence
    Not listed
  • ClickSend
    Not listed
  • CM.com
    Not listed
  • Commio
    Not listed
  • Contiguity
    Not listed
  • Dexatel
    Not listed
  • GatewayAPI
    Not listed
  • Gupshup
    Not listed
  • Messente
    Not listed
  • Mobile Text Alerts
    Not listed
  • Pinnacle
    Not listed
  • Plivo
    Not listed
  • Routee
    Not listed
  • Signal House
    Not listed
  • Signalmash
    Not listed
  • SignalWire
    Not listed
  • smsmode
    Not listed
  • Surge
    Not listed
  • Telgorithm
    Not listed
  • TextGrid
    Not listed
  • TXTImpact
    Not listed
  • Webex Connect
    Not listed

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