OpenPhone handles your business calls and texts, and Slack is where the team decides who deals with them. FlowMattic posts incoming texts to a shared channel, shares call summaries and recordings after each call, flags ringing calls and reminds someone to ring back. For sales, support and field teams sharing one or more OpenPhone numbers.
9 triggers 25 actions 7 example workflows 1 ready-made template Unlimited runs
When this happens in OpenPhone9 triggers
Do this in Slack14 actions
1. TriggerMessage Delivered2. ActionSend Channel MessageWhen OpenPhone fires Message Delivered, FlowMattic runs Send Channel Message in Slack with the data from that event.
You build this in the FlowMattic workflow builder on your own site. See the setup steps
Each one uses only triggers and actions the two integrations ship today, plus FlowMattic's own tools. Where the library has a ready-made template, import it instead of building from scratch.
Ready-made templateOnce an outgoing message is delivered, the number, sender and text are posted, giving managers a channel view of what the team is saying to customers.
Message DeliveredSend Channel Message
View the template Customer texts to a shared number appear in a Slack channel with the sender's number, so whoever is free can claim it in a thread and reply from OpenPhone.
Message ReceivedSend Channel Message
When OpenPhone finishes its summary, it goes to the account channel, so colleagues know what was agreed without listening to the recording.
Call Summary CompletedSend Channel Message
Each completed recording is posted with the call details to a private channel where team leads review calls for training, away from the main channels.
Call Recording CompletedSend Private Channel Message
When a call starts ringing, the caller's number is posted, so someone at a desk can pick it up even if the person on duty is busy.
Call RingingSend Channel Message
A Filter keeps calls that ended without being answered, and Add Reminder puts a call-back reminder with the number on the owner's Slack list.
Call CompletedFilterAdd Reminder
An AI Agent reads the transcript and lists the follow-ups promised on the call. Find User by Email locates the rep and they get the list by direct message.
Call Transcript CompletedAI AgentFind User by EmailSend Direct Message
After these steps, every text your OpenPhone number sends is posted to a Slack channel once it is delivered.
Under Connects, add an OpenPhone connection with an API key from the workspace that owns the number.
Add a Slack connection for your workspace and create the channel that will hold the log.
Create a workflow with the OpenPhone Message Delivered trigger and send a test text so FlowMattic captures the message fields.
Add Send Channel Message, pick the channel, add the recipient, sender and text, test it and switch the workflow on.
1. Trigger in OpenPhone
Message Delivered
2. Action in Slack
Send Channel Message
Fields mapped from the earlier steps (a typical setup)
| From OpenPhone | To Slack |
|---|---|
| To | Message: customer |
| From | Message: our number |
| Body | Message: text |
| Created at | Message: sent |
A trigger starts a workflow. An action is something FlowMattic does in the app as a step.
OpenPhone and Slack connect through FlowMattic on your own site, with no separate automation account in the middle and no charge per run.
Numbers, texts and summaries go from OpenPhone to Slack through your own WordPress site, not through another automation account.
Runs are unlimited, so a busy line that logs hundreds of calls and texts a day stays on the same FlowMattic plan.
Texts go to the team, recordings to coaches and action items to the rep, so nobody has to dig through one busy channel.
Create a workflow with the OpenPhone Message Received trigger and add Slack Send Channel Message. Add the sender's number and text to the message, test it and switch it on.
Yes. Use the Call Summary Completed trigger with Send Channel Message. If you start from Call Completed instead, add Get Call Summary with the call ID to fetch it.
Yes. Add a Router that checks which of your numbers the call or text used, and give each path a Send Channel Message step for that team's channel.
Yes. After a call, OpenPhone Create Contact can save the caller with the details you know, and a Slack message can tell the team the contact was added.
Not from Slack itself, because Slack has no trigger here. A form, a Webhook or another app's trigger can run OpenPhone Send Text Message instead.
Did not find your answer? You can browse the help center or ask us directly.
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Reviewed 27 Oct 2026. The example workflows are written with AI from the real triggers and actions of both integrations and checked against them. OpenPhone integration 1.0, Slack integration 1.0.
