ReplyArc
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Now live — Multi-channel outbound for agencies

Every reply, every channel, one inbox.

ReplyArc unifies LinkedIn, email, and letters with a Slack-native reply loop and BYOK AI that learns your voice — built for agencies running outbound at scale.

Start free trialSee how it works
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LinkedIn12
Email47
Letters3
Sarah Chen2m
positiveLinkedIn
Daniel K.8m
meetingEmail
Priya Singh27m
oooEmail
Marcus Rel1h
negativeLinkedIn
Alex Ho3h
positiveEmail
Daniel K. · Acme Co.
Re: Following up · Email · Thread of 4
Meeting intent
Daniel · 2:14 PM
Hey — thanks for the note last week. We're evaluating a couple options for Q2. Can you do next Thursday at 10am PT? Happy to chat then.
AI draft · tuned to Jacob's voice
Thursday 10am PT works — I'll send a Google Meet invite. Want me to loop in our implementation lead so we can walk through setup on the same call?
SendEditRegenerate
Plays nicely with your stack
LinkedIn
Gmail
Outlook
Slack
HubSpot
Salesforce
Zapier
Notion
Calendly
Zoom
Microsoft Teams
Google Calendar
Pipedrive
Airtable
Stripe
Intercom
Linear
Make
n8n
Apollo
LinkedIn
Gmail
Outlook
Slack
HubSpot
Salesforce
Zapier
Notion
Calendly
Zoom
Microsoft Teams
Google Calendar
Pipedrive
Airtable
Stripe
Intercom
Linear
Make
n8n
Apollo
The platform

Built for agencies who live in the reply.

One inbox for every channel. A Slack agent that drafts, classifies, and fires back in the loop. AI that learns from your wins — on your own API keys.

Unified inbox across LinkedIn, email, and letters

Cross-channel threading with live classification. See every conversation in one place — and know the intent before you open it.

Sarah ChenLinkedIn
Interested — let's set up a call
positive
Daniel K.Email
Thursday 10am PT works for me
meeting
Priya SinghLetter
Received — will review this quarter
neutral

Slack-native replies

Your team lives in Slack. Reply there, and the inbox mirrors it in real time. Bi-directional sync, no context switching.

#inbox-replies
ReplyArc · now
New reply from Daniel K. — meeting intent detected
✓ Reply✎ Edit→ Open

BYOK AI that learns your voice

Bring your own OpenAI, Anthropic, or Azure key. We never touch your keys — and the agent studies replies you've liked.

OpenAI · gpt-4.1
Anthropic · claude-opus-4-7active
Azure · gpt-4o
Encrypted · never leaves your vault

Multi-channel sequences

Touchpoints across LinkedIn, email, and physical letters in one orchestrated flow.

LI
Connect req
EM
Intro
EM
Follow-up
LT
Letter

Webhooks + event bus

Hook anywhere. 24+ event types fan out to your stack — n8n, Make, internal tools.

reply.receivedPOST
classification.completedPOST
message.sentPOST
thread.meeting_bookedPOST

Privacy-first tracking

GDPR-aware consent gates, per-workspace DPA, encrypted BYOK vault. Ship compliantly from day one.

GDPR
SOC2
DPA
Compliance, built-in.
Per-workspace DPA, encrypted key vault, opt-out trackers.

Activity timeline, forever

Every send, open, reply, and classification logged and queryable. Audit-ready by default.

09:42
Reply classified
09:40
Message sent via Email
09:38
Thread opened in Slack
How it works

Three moves. One workflow.

01
Connect your channels
Hook up LinkedIn, email (Gmail / Outlook / SMTP), and a letter-mail provider in minutes. Bring your own AI key.
02
Launch sequences
Design multi-channel plays or import from your favorite tools. ReplyArc routes every reply into one inbox.
03
Reply from anywhere
The Slack agent drafts, classifies, and sends. The inbox mirrors every action in real time.
Slack-native

Your team already lives in the reply.

We meet you there. The Slack agent drafts replies in your voice, classifies intent, and fires back — without leaving the channel. Every action mirrors to the inbox in real time, bi-directionally.

  • Intent classification before you read
  • AI drafts tuned to what you've approved before
  • One click to send — or delegate to a teammate
  • Bi-directional sync: Slack ↔ inbox, instantly
#
inbox-replies
ReplyArc · Slack-native agent
R
ReplyArc2:14 PM
💬 New reply from Daniel K. (Acme) — meeting intent
Suggested reply
Thursday 10am PT works — I'll send a Google Meet invite. Want me to loop in our implementation lead?
✓ Send as-is✎ Edit🔄 Regenerate
J
Jacob2:14 PM
✓ sent — perfect, that's exactly my tone
R
ReplyArc2:14 PM
Sent. Inbox updated. Learning from this pattern.
Pricing

One plan. Built for agencies.

Everything included. No seat tax. Your AI costs stay on your own keys.

Agency
$299/mo
billed monthly · cancel anytime
14-day free trial
Unlimited channels
Unified inbox + classification
Slack-native reply loop
BYOK AI (OpenAI / Anthropic / Azure)
Webhooks + 24+ events
Full activity audit log
Per-workspace DPA
Priority agency support
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Reply faster. Close more.
From one inbox.

Join the agencies running multi-channel outbound at scale without drowning in channels.

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