Herd is online and listening for replies

Every positive reply,
answered.

Herd reads every reply across your sending tools, email and LinkedIn.
He drafts the answer and follows up until the meeting is booked. You approve.

MOut of office
SYes, let's talk!
JUnsubscribe · handled
Meeting booked · Tue 2pm

A day with Herd

Hi, I'm Herd. Want to watch me work your inbox?

Inbox/All clients9 workspaces
9:00 AM
M
Mike[Client B]
I'm out of office until Monday.
New
S
Sarah[Client A]
Yes, let's talk! Next week works.
New
J
James[Client C]
Please take me off your list.
New
P
Priya[Client D]
How does your pricing compare to [Competitor]?
New
0 sent 0 booked 0 skipped 0 waiting on you
9 inboxes. All mine.

Tap Herd for a pat · 0

Before Herd

Your 9am, before Herd.

Replies come in all night, across every client. Here's what usually happens to them.

"Yes, let's talk this week."4:02 PM
AnsweredNext day, 11:40 AM

Replied, but not in time

A positive reply lands at 4pm. Someone has to log into that client's inbox, read it, judge it, write it and send it. By morning it's one of many.

Reply sent
Follow-up 1
Follow-up 2
Meeting booked

Replied once, then forgot

The first answer goes out. The follow-up never does. One agency we spoke with counts 7 or 8 messages to book a meeting.

20 clients, 100 inbox tabs

Every client has its own inbox, its own labels and its own logins. The morning goes on switching tabs instead of booking meetings.

“There's so much money left on the table for them.”

Country manager, lead-gen agency, Sep 2026

Your first report

Herd finds the meetings you're missing.

Connect Smartlead, Instantly, HeyReach, Lemlist or any of 23 tools and Herd reads your last 7 days. In about 10 minutes you see every lead slipping through. Free, no card.

Herd's first reportLast 7 days
14
interested leads are waiting for a reply
The oldest has waited 31 hours
7marked Not interested, but they are
9went quiet after your reply
11back from out of office this week
Draft ready for Sarah

"Great to hear, Sarah! Here's a link to grab 20 minutes this week."

Unlock and send

Setup

Set up in one chat. Done in 10 minutes.

No settings pages. Herd asks, you tap, and he connects your tools, clients and labels. Already using another AI for replies? Paste your rules.

HerdSetting up
Hi! Which tool do you send from?
Smartlead
Connected. I found 14 clients. Want all of them?
Yes, all of them
All set. Reading your last 7 days now.

Every client

Every client, one inbox.

Email and LinkedIn replies from every client in one place. Filter by client, tool or label, and give teammates access by chat.

All clients9 workspaces
Herd is making his rounds
[Client A]
4 positives
2 going cold
4 replied2 followed up
[Client B]
3 positives
Nothing waiting
[Client C]
2 positives
1 going cold
2 replied1 followed up
[Client D]
2 positives
1 going cold
2 replied1 followed up
[Client E]
1 positive
2 going cold
1 replied2 followed up
[Client F]
0 positives
Nothing waiting
[Client G]
3 positives
1 going cold
3 replied1 followed up
[Client H]
1 positive
Nothing waiting
[Client I]
2 positives
1 going cold
2 replied1 followed up
Positives, going cold and waiting on you, per client

For your clients

Your clients get a window too.

Clients get their own login and a Monday summary with meetings and pipeline. On White label, it's all your brand.

LOGO
Weekly summary · [Client A]From [Your agency] · Mon, Oct 19
Replies46
Positive replies12
Meetings booked5
Median response1h 40m
Estimated pipeline$7,5005 meetings × $1,500
per meeting
Hot leads this week
Sarah · VP SalesMeeting Tue 2pm
Leo · FounderAsked for a demo
Amira · Head of GrowthCall requested
Source: Smartlead, HeyReach · Oct 12 to 18

Free first report

What Herd sniffs out first.

Connect a tool and Herd reads your last 7, 30 or 90 days. This is what he usually turns up.

14interested leads still waitingThe oldest has waited 31 hours. Herd drafted a reply for every one.
Tomas Reyes · Fenwick Labs"How does it work for 12 seats?"31h
Ines Duarte · Oakridge Solar"What would you need from us?"22h
Henrik Sand · Lindqvist"Send me what you have."9h
Slow clientsMedian time to reply, per client.
Fenwick Labs19h
Oakridge Solar7h
Lindqvist2h
7 Hidden positives Your tool marked them negative. Herd read them again and they're interested.
9 Ghosted after your reply Interested, then quiet. No follow-up ever went out.
5 Not now, with a date Asked to hear back later. 2 of those dates have already passed.
3 Referrals not acted on Pointed you to a colleague. Nobody reached out.
11 Back from out of office Returned this week and ready for a follow-up.
Want to see yours? Connect a tool and I'll count them.
See your report

Integrations

Email and LinkedIn.
One reply desk.

Works with 23 sending tools through your sequencer, with no mailbox connection. Herd sends approved replies through 17 of them.

EmailEvery mailbox
LinkedInEvery sender
Smartlead logo
Smartlead Email
Instantly logo
Instantly Email
EmailBison logo
EmailBison Email
HeyReach logo
HeyReach LinkedIn
Plus 19 more
LemlistPlusVibeSaleshandyWoodpeckerReply.ioQuickMailLa Growth MachineGetSalesAimfoxDripifySalesRobotExpandiOutreachSalesloftApolloKlentyMailshakeSnov.ioWaalaxy
View integrations

Work with Herd wherever you are.

Slack, a chat, an inbox or your own code. Same replies, same drafts, whichever suits the person doing the work.

Replies land in Slack, drafted

Each positive reply posts to that client's channel within about 2 minutes, with Herd's draft. Send, edit or skip right from Slack.

Ask Herd in plain words

For one client or all of them. Teammates see every client, or only the ones they're assigned.

Or work from an inbox

One inbox for every client, email and LinkedIn, with the full thread and Herd's draft beside it.

Call it from your own tools

The REST API, MCP server and CLI use the same tools as Herd. See the docs.

You're in. Herd's your co-pilot.

Manual mode. Ask Herd anything, review his drafts, approve what goes out. Nothing sends without your nod.

You're off. Herd's on shift.

Auto mode. Log off and Herd keeps replying, schedules out-of-office follow-ups and handles unsubscribes. Anything he isn't sure about waits for you in the morning.

HerdManual mode · waiting for your nod
9:02 AM
Morning! How many replies overnight?
31 across 9 clients. 8 positive, 3 going cold. I've drafted replies for all of them.
Show me the positives.
Here are your 8 positives, newest first:
Sarah · [Client A]"Yes, let's talk! Next week works."Draft ready
Leo · [Client F]"Sounds good. Can you send pricing?"Draft ready
Amira · [Client D]"Could we do Thursday instead?"Draft ready
+ 5 moreReviewApprove all 8
Auto mode · working2:14 AM
You get some sleep. I've got your inboxes.
11:48 PMSkipped 6 out-of-office replies
12:31 AMReplied to Sarah · [Client A]
1:05 AMBooked a call with Leo · [Client F]
1:40 AMRemoved James from the list · [Client C]
2:14 AMSaved a pricing question for you, not sent
Good night. Sleep well, I'll keep watch.

Beyond triage

Herd does more.

Herd doesn't stop at sorting replies. Here's what else he takes off your plate.

Daily digest

Herd checks in.
You don't check up.

Every morning: replies waiting, drafts ready, meetings booked yesterday, anything broken. Only your clients.

Replies waiting18
Drafts ready6
Meetings booked yesterday11
Warm-ups filtered out21
Needs you: 2 pricing questions · 1 broken connection fixed by Herd

Lead magnets

"Send it over"?
Herd fetches.

Herd sends the prospect's details to your system by webhook, gets back a personalised asset, and drops it in the same thread.

Sounds interesting, send it over.
Yes!Prospect asksWebhookDetails sentBuiltYour systemDeliveredSame thread
[Industry] report for [Company].pdf

Recurring tasks

Say it once.
Herd does it daily.

"Every weekday at 8am, draft replies for positives older than 2 hours." Herd repeats it back, you confirm, and it just happens.

Draft replies for positives older than 2hWeekdays · 8:00 AM Active
Client summaries to each Slack channelMondays · 9:00 AM Active
Pipeline recap across all clientsFridays · 4:00 PM Active

Follow-ups

Follows up until
the meeting is booked.

Every draft ends with a booking link or two times. If a lead goes quiet, Herd drafts the next nudge for your nod, and stops the moment a meeting lands in your calendar.

Reply sent with a booking linkDay 1
Quiet. Follow-up drafted, you approvedDay 2
Second follow-up draftedDay 4
Meeting booked. Herd stops.

Pricing

Simple plans. One good boy.

Free until Herd books your first meeting. Priced per client, never per seat or mailbox.

Starter $49/ month For your own company, where you are the client.
Start free
  • 1 client
  • Unlimited mailboxes and LinkedIn senders
  • All 23 sending tools, email and LinkedIn
  • Every reply labeled and drafted within 2 minutes
  • Approve one, some or all, or turn on auto mode
  • Daily digest, Slack alerts and a weekly client summary
  • Teammates and a client login
Recommended
Growth $129/ month For agencies with several clients and a small reply team.
Start free
  • Everything in Starter, plus:
  • Up to 10 clients
  • One inbox across all clients
  • Narrow the view to a single client
  • Auto mode set per client
  • A client in two tools is counted once
  • New clients detected within 24 hours
Unlimited $299/ month For agencies past 10 clients, and anyone sending lead magnets.
Start free
  • Everything in Growth, plus:
  • Unlimited clients
  • Lead magnet delivery that still ends in a meeting
  • Follow-ups and meeting invites
  • Labels and opt-outs written back to your sequencer
Limited-time offer
White label $499$299/ month For agencies running replies for clients as their own service.
How to get $299 Join as a partner and post about ReplySync twice a month. Available for a limited time.
Claim the offer
  • Everything in Unlimited, plus:
  • Your logo and name in the app, emails and client summaries
  • Resell ReplySync to your clients
  • Custom domain
  • Bring your own AI key
  • Priority support
You approve every sendNo AI usage billYour keys stay yours, encryptedSlack or email alerts

No card to start. Billed monthly in USD once your first meeting is booked.

FAQ

Frequently asked questions

Everything agencies ask before handing Herd the inboxes.

ReplySync is an AI reply assistant for lead gen agencies. Herd, its assistant, reads every reply across Smartlead, Instantly, HeyReach, Lemlist and 19 more tools, drafts the answer and follows up until a meeting is booked. You approve.

No. Drafts wait for your approval unless you turn on auto mode for a client. Even then, angry, legal, pricing and uncertain replies still wait for you.

Herd labels by your definitions, not a generic model. He asks what "interested" means for you, and every edit you make teaches him.

23 sending tools across email and LinkedIn, including Smartlead, Instantly, HeyReach, EmailBison and Lemlist. Herd sends approved replies through 17 of them.

No. Herd works through your sequencer, from the same mailbox or LinkedIn sender and in the same thread, so he only sees what your sequencer sees.

You pay nothing until a meeting is booked, detected through your connected calendar or booking tool. We ask for a card at the end of onboarding but don't charge it until then. After that the plan bills monthly and you can cancel anytime.

No. Labeling and drafting are included in your plan, and you never need your own AI key.

No. You can give clients a login that shows only their own replies, or send them the weekly summary instead.

Add a key for each tool you send from (some use a sign-in or a link instead). Clients, mailboxes, LinkedIn senders and labels import on their own, and new clients show up within 24 hours for you to add or skip.

Neither. ReplySync runs on top of the tools you already use and clears the inbox faster. For a founder handling replies alone, it gives hours back.

English only for now. Replies in other languages are labeled "Other language" and don't get a draft.

Not automatically. The API can tell your CRM when a reply is labeled or a meeting is booked.

Hehe, that tickles!

Ready when you are

Meet your new
best friend.

Sign up and Herd shows you the meetings you're missing, in about 10 minutes. No card needed.

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