Works with your stack. Ready from day one.
Callaro connects to your telephony, WhatsApp, SMS, RCS and email accounts, CRM, payments and automation — plus REST and Events APIs, signed webhooks, SDKs for web and mobile, any MCP server and your own HTTP APIs. No data migration. No rebuilds. Just outcomes from every channel flowing into the systems you already use.
How Callaro connects
Bring your own telephony
Keep your carrier and numbers — Twilio, Plivo, Exotel, Ozonetel, Kookoo, MCube — or stream calls from your own telephony.
Your messaging accounts
Your WhatsApp number, SMS sender, RCS agent and email domain stay yours. Connect them once; one agent answers on all of them.
SDKs and website widget
Chat and in-app voice for web, iOS, Android, React Native and Flutter — with signed-in users recognised and call invites that ring the app.
REST API & signed webhooks
Manage contacts, conversations, follow-ups and call invites with scoped API keys. Get call and conversation outcomes by HMAC-signed webhooks.
Events into live conversations
Post an event — payment received, CRM stage changed, order shipped — and every open chat and live call with that customer knows within seconds.
API channel (headless agent)
Put the agent inside your own interface: your backend starts and replies to conversations, and answers arrive as streamed events or signed webhooks.
Connect any MCP server
Register any MCP server with bearer or API-key auth. Callaro discovers its tools and the agent calls them on any channel — with a per-agent tool allowlist.
In-conversation API orchestration
Fetch context when a call or chat starts, call your HTTP APIs mid-conversation, map responses to variables with JMESPath, and let the AI decide which API to call.
CRM, payments & automation
Write outcomes to your CRM, take payments with Razorpay or Stripe links, and trigger Zapier or n8n workflows from any channel.
Supported integrations
30 integrations across telephony, messaging, email, CRM, payments, commerce, automation, APIs and SDKs.
Twilio
Route calls globally through Twilio's programmable voice — SIP trunking, number provisioning, and call routing.
Exotel
Cloud telephony platform — termination, number masking, and IVR flows for business calls.
Plivo
Bring your own Plivo account for programmable voice, SIP trunking, and global number provisioning.
MCUBE
Cloud telephony and call-management stack — connect MCUBE numbers, IVR, and call routing to Callaro.
Ozonetel
Contact centre and cloud telephony stack — real-time agent handoff and call logs.
Knowlarity
Smart IVR and virtual receptionist flows for finance and healthcare teams.
Kookoo
Connect Kookoo numbers for inbound and outbound AI calls.
HubSpot
Log call outcomes, update contact properties, create deals, and trigger HubSpot workflows — all during the call.
Salesforce
Update leads, opportunities, and tasks in real time. Push transcripts and outcome tags straight into Salesforce.
Zoho CRM
Sync contacts, log calls, and trigger Zoho automations. Great fit for SMB teams running on the Zoho ecosystem.
Interakt
Run your WhatsApp AI agent on your Interakt number — two-way conversations, templates and follow-ups, sharing one memory with voice and chat.
WATI
Connect your WATI number so the same Callaro agent answers on WhatsApp, sends templates after the 24-hour window and hands off to your team.
WhatsApp Cloud API
Connect your number via Meta's embedded signup. Buttons, lists, catalogs, carts, native checkout, flows and order status — all from one agent.
360dialog
WhatsApp Business through 360dialog with the full set of rich messages, commerce and flows.
Gupshup
Bring your Gupshup WhatsApp number — the Callaro agent answers, sends templates and follows up.
AiSensy
Use your AiSensy WhatsApp account for AI-driven follow-ups and template campaigns.
Twilio Messaging
WhatsApp, two-way SMS and RCS through your Twilio account — with automatic SMS fallback for RCS.
MSG91
India DLT-registered SMS for reminders and confirmations, with opt-out handling and quiet hours.
Your domain (SMTP + IMAP)
The email agent replies in-thread from your own domain; inbound by forwarding or IMAP.
Amazon SES
Receive inbound email through SES forwarding and answer it with the same Callaro agent.
SendGrid · Mailgun · Postmark
Forward inbound email from your existing provider; replies stay threaded and on-brand.
Razorpay
Payment links created in the conversation; the payment result reaches every open chat and a live call.
Stripe
Collect payments by link on any channel and confirm them aloud on a live call.
Web widget & SDKs
Chat and in-app voice for web, iOS, Android, React Native and Flutter — with signed-in user identity and call invites.
REST & Events API
Manage contacts, conversations and follow-ups, and push events (payment, CRM stage, order shipped) into live conversations.
Signed webhooks
Call and conversation events delivered to your systems, signed with HMAC and per-channel subscriptions.
MCP servers
Connect your Model Context Protocol servers; the agent discovers and uses their tools on any channel.
Shopify
Look up order status, trigger returns, and handle post-purchase queries on calls, WhatsApp and chat — without a human agent.
Zapier
Connect call and conversation outcomes to 6,000+ apps with zero code. Trigger Zaps on call end, conversation completed, or hand-off.
n8n
For technical teams: self-host workflows that react to Callaro webhooks and push data anywhere.
Don't see your stack?
We're a young product and actively expanding integrations. If you're running something we haven't listed yet — share your stack and we'll confirm the best integration path within 48 hours.
Ready to connect your stack?
Book a demo and we'll walk through exactly how Callaro fits into your existing systems.
Book a demo