Twilio + Slack
Connect Twilio and Slack to Unify Your Communications and Automate Alerts
Stop switching between SMS inboxes and team chat. Route customer messages directly into Slack so your team can actually respond.
Why integrate Twilio and Slack?
Twilio and Slack are great at completely different things. Twilio handles customer-facing SMS, voice, and messaging. Slack keeps your internal team connected. The problem is they don't talk to each other — which means customer messages sit in a Twilio inbox while your support or sales team has no idea they're there. Connecting the two through tray.ai lets you route inbound customer signals to the right people in Slack the moment they arrive, whether you're managing support queues, paging on-call engineers, or tracking replies to an SMS campaign. It works both ways, too: a Slack reaction or slash command can fire an outbound Twilio SMS, so your team never has to leave Slack to close the loop.
Automate & integrate Twilio & Slack
Use case
Inbound SMS to Slack Channel Notifications
Whenever a customer texts your Twilio number, tray.ai posts the message content, the sender's phone number, and any relevant metadata into a designated Slack channel. Support or sales teams can monitor and triage incoming messages without logging into a separate platform. No more missed messages during peak hours or shift changes.
Use case
Missed Call Alerts Routed to On-Call Staff
When a customer calls a Twilio number and nobody picks up, tray.ai immediately notifies a specific Slack user or on-call channel with the caller's number, call duration, and timestamp. It's especially useful for support and operations teams who need to follow up fast. The alert can also include a click-to-call link so callbacks take one tap from Slack.
Use case
Automated Incident Alerting via SMS and Slack Simultaneously
For DevOps and engineering teams, tray.ai can use Twilio to send an SMS to key stakeholders while simultaneously posting an incident alert to a dedicated Slack channel — both triggered by the same event. Critical alerts reach team members whether they're at their desk or away from their computer. You can customize routing based on severity, time of day, or the affected service.
Use case
Lead Reply Tracking for SMS Marketing Campaigns
When contacts reply to outbound Twilio SMS campaigns, tray.ai posts each reply into a dedicated Slack channel and tags the responsible sales rep or account owner. Sales teams can act on warm responses immediately instead of finding them hours later in a Twilio dashboard. You can pull in CRM data — contact name, company, deal stage — so reps have full context without going anywhere else.
Use case
Slack-Triggered Outbound SMS for Customer Notifications
Your team can send Twilio SMS messages directly from Slack using a slash command, a workflow button, or a Slack bot interaction — no Twilio console required. This works well for operations teams that need to notify customers about appointment reminders, order updates, or service disruptions on the fly. tray.ai handles the translation between the Slack interaction and the Twilio API call.
Use case
Two-Factor Authentication and Verification Workflow Monitoring
When Twilio Verify sends OTP codes or authentication messages, tray.ai can log events like failed verification attempts or unusual volumes and post real-time alerts to a security or operations Slack channel. Security teams get immediate visibility into authentication anomalies without waiting for a report. You set the thresholds, so only actionable events trigger a Slack notification.
Use case
Customer Support Escalation via SMS Confirmation and Slack Handoff
When a support ticket hits a critical escalation threshold, tray.ai can send the customer a Twilio SMS confirming the escalation while simultaneously posting a handoff message to the right Slack channel with ticket details and customer contact information. The customer knows they're being taken care of, and the internal team is activated without anyone having to manually coordinate. The workflow can be triggered from your helpdesk, CRM, or any other system tray.ai connects to.
Get started with Twilio & Slack integration today
Twilio & Slack Challenges
What challenges are there when working with Twilio & Slack and how will using Tray.ai help?
Challenge
Handling High Volumes of Inbound SMS Without Flooding Slack
During peak periods or active SMS campaigns, inbound Twilio message volume can spike fast. If every single message gets posted to Slack without any filtering, channels get buried and teams start ignoring the noise — which defeats the whole point.
How Tray.ai Can Help:
tray.ai has built-in conditional logic and branching so you can filter messages by keyword, sender, or time of day before routing them to Slack. You can also set up digest workflows that batch messages over a time window and post a summary instead of individual notifications, so channels stay clean and useful.
Challenge
Mapping Twilio Phone Numbers to the Right Slack Channels or Users
Most businesses run multiple Twilio numbers for different products, regions, or campaigns. Without routing logic, everything lands in one Slack channel — a mess of unrelated messages that nobody wants to sort through.
How Tray.ai Can Help:
tray.ai's workflow logic lets you build dynamic routing rules that map each Twilio phone number or message keyword to a specific Slack channel, user group, or direct message. You can maintain routing tables in a Google Sheet or database connector, so non-technical staff can update them without touching the workflow.
Challenge
Keeping Twilio Webhook Payloads Reliable and Secure
Twilio webhooks can fail due to network issues, and without signature validation there's a real risk of processing spoofed requests. A flaky webhook pipeline means Slack notifications get dropped — or worse, fabricated.
How Tray.ai Can Help:
tray.ai gives each workflow trigger a dedicated HTTPS endpoint, and you can add a validation step that checks the Twilio request signature against your auth token before any data gets processed or forwarded to Slack. Built-in retry logic handles transient failures so dropped notifications aren't something you have to worry about.
Challenge
Enabling Two-Way Conversations Without Custom Code
A true two-way flow — where a team member replies in Slack and that response goes out as an SMS through Twilio — usually means custom webhook handling, bot infrastructure, and fiddly state management to match Slack interactions back to the right Twilio thread. It's more work than it sounds.
How Tray.ai Can Help:
tray.ai's Slack connector supports interactive message components including buttons and modals, and can store conversation state in tray.ai's built-in data storage. That means workflows can capture a reply or button click in Slack, look up the associated Twilio conversation or phone number, and send the outbound SMS — no custom code, no bot hosting.
Challenge
Maintaining Compliance and Privacy When Logging Customer SMS in Slack
Customer SMS messages can contain PII, opt-out requests, or sensitive content. Posting raw message bodies into shared Slack channels creates real compliance exposure under GDPR, TCPA, or HIPAA if you don't have the right data handling controls in place.
How Tray.ai Can Help:
tray.ai lets you apply data masking and transformation steps before any Twilio message content reaches Slack. You can strip or redact PII fields, catch opt-out keywords and route them to a separate compliance workflow, and control which channels or users get full message content versus a sanitized summary — all within the tray.ai workflow editor, no custom code needed.
Start using our pre-built Twilio & Slack templates today
Start from scratch or use one of our pre-built Twilio & Slack templates to quickly solve your most common use cases.
Twilio & Slack Templates
Find pre-built Twilio & Slack solutions for common use cases
Template
Post Inbound Twilio SMS Messages to a Slack Channel
This template listens for incoming SMS messages on a Twilio number and automatically formats and posts each message — including sender phone number, message body, and timestamp — into a specified Slack channel so your team stays informed in real time.
Steps:
- Trigger: Receive an inbound SMS webhook event from Twilio
- Transform: Format the sender number, message body, and timestamp into a readable Slack message block
- Action: Post the formatted message to the designated Slack channel using the Slack connector
Connectors Used: Twilio, Slack
Template
Send a Slack Alert When a Twilio Call Is Missed
This template monitors Twilio call events and fires a Slack direct message or channel notification whenever a call goes unanswered, including the caller's number and the time of the missed call, so your team can follow up promptly.
Steps:
- Trigger: Receive a Twilio call status callback webhook indicating a no-answer or missed call
- Filter: Confirm the call status is 'no-answer' or 'busy' before proceeding
- Action: Send a Slack notification to the on-call channel or user with caller details and a callback link
Connectors Used: Twilio, Slack
Template
Broadcast Incident Alerts via Twilio SMS and Slack Simultaneously
When an incident is detected — from a monitoring tool, webhook, or manual trigger — this template sends an outbound Twilio SMS to a defined list of stakeholders and posts a formatted alert to a Slack incident channel at the same time.
Steps:
- Trigger: Receive an incident event from a monitoring platform or manual webhook
- Parallel Action A: Use Twilio to send an SMS alert to each stakeholder in the on-call list
- Parallel Action B: Post a structured incident alert message to the designated Slack channel with severity, service name, and incident link
Connectors Used: Twilio, Slack
Template
Slack Slash Command to Send an Outbound Twilio SMS
This template lets team members send a Twilio SMS to any phone number directly from Slack by typing a slash command. tray.ai captures the command payload, extracts the recipient number and message text, and makes the Twilio API call to deliver the SMS.
Steps:
- Trigger: Capture a Slack slash command event containing a recipient phone number and message body
- Validate: Parse and sanitize the phone number and message content before sending
- Action: Use the Twilio connector to send an outbound SMS to the specified number and post a confirmation back to the Slack user
Connectors Used: Slack, Twilio
Template
Notify Slack When Twilio Verify Authentication Failures Spike
This template aggregates Twilio Verify callback events in tray.ai and sends a Slack alert to a security channel when failed verification attempts within a rolling time window exceed a defined threshold.
Steps:
- Trigger: Receive Twilio Verify status callbacks and log failed verification events in tray.ai storage
- Evaluate: Count failed attempts in the last rolling window and compare against the configured threshold
- Action: If the threshold is exceeded, post a detailed Slack alert to the security channel including failure count, time window, and affected numbers
Connectors Used: Twilio, Slack
Template
SMS Campaign Reply Notifier with CRM Context Posted to Slack
When a contact replies to an outbound Twilio SMS campaign, this template looks up the sender's phone number in your CRM, retrieves the contact record and deal details, and posts an enriched Slack notification to the sales channel — tagging the contact owner so they can follow up right away.
Steps:
- Trigger: Receive an inbound SMS webhook from Twilio indicating a reply to a campaign message
- Enrich: Look up the sender's phone number in the CRM connector to retrieve contact name, company, and deal stage
- Action: Post an enriched Slack message to the sales channel, tagging the contact owner with the reply text and a link to the CRM record
Connectors Used: Twilio, Slack