ReplyArcReplyArc
Get started
OWN YOUR COLD EMAIL INFRASTRUCTURE

paying agencies. Forever.

We install a fully-owned cold-email system inside your business — on your domains, in your Slack, with your keys. One-time fee. Six months of iteration support. Then you own it forever.

Book the install callSee what you own on day 14
app.replyarc.com · live install
dashboard.acme.com
live
/ 6 replies · today
9:14 AMMarcus Yang · ThreadlightOBJECTIONAlready running outbound with another vendor — not looking right now.
9:02 AMPriya Rajan · NorthwindPOSITIVEYes — Tuesday at 2pm works. Calendar invite incoming.
8:48 AMJane Okafor · Sable & CoFORWARDLooping in our COO — she handles vendor relations.
8:31 AMTom Reilly · ForgeOOOOut of office until May 3. Auto-reply detected.
8:15 AMAna Velasco · GraniteOUT-OF-SCOPEWrong contact — please email procurement@granite.co.
7:58 AMKira Sato · BaylineNEUTRALWhat does pricing look like at our scale (200 seats)?
/ preview only · not your live install
0+
Campaigns trained on
0+
Outbound replies scored
0 days
Install to first send
0 months
Slack support
USED BY TEAMS FROM · Q2 INSTALL COHORT
B2B SaaSVertical SaaSDev toolsCybersecurityMarTechFintechLogistics
END-TO-END · ONE LEAD · ONE LOOP
Watch one lead become a booked meeting.
  1. Lead
    T+00:00
  2. Enriched
    T+00:08
  3. Email sent
    T+09:30
  4. Reply detected
    T+11:14
  5. Meeting booked
    T+11:31
LeadSofia Marín, Head of GTM at Helmsly. From your import.
1 / 5
THE INSTALL · 5 COMPONENTS

Five things ship before day 14.

Four trained agents and a built-in sequencer. Each runs inside your stack without us. Below: what they actually look like in operation.
01 · ICP & ANGLE AGENT

Picks accounts that reply.

Trained on 150+ historical campaigns across four verticals. Scores every account on signal density, ranks them, attaches a specific angle hypothesis you can argue with line-by-line before it scores the list.
ICP Agent · filter builder
compiling…
add filter
Matches
24,602
0/4 filters
auto-compile
02 · COPYWRITER AGENT

Writes in your voice.

Pulls from 10k+ scored hooks. Drafts 3 variants per touchpoint, learns from every edit your operator makes, and never ships without your sign-off. Every line redlinable.
Copywriter Agent · drafting
1/3 variants
Prospect
Name
Marcus Chen
Title
VP Engineering
Company
Acme Robotics
Signal
Acquired Glassflow · last 30d
Subject
Body
VARIANT A · shortVARIANT B · pattern interruptVARIANT C · case study
03 · REPLY AGENT

Drafts every reply in Slack.

Inbound thread classified positive / nurture / hot lead. Reply Agent drafts the response in your voice with prospect context. Your operator hits Send, Edit, or Regen — two clicks instead of writing from scratch.
#replyarc · inbound
POSITIVE · NURTURE · 1/3
MC
Marcus Chen · Acme Roboticsjust now
Interesting — we're actually mid-RFP on consolidation. Do you have a deck or a few customer stories I could share with the team?
Classifying…
Reading thread context…
⌘ + Enter
04 · LEAD-LIST BUILDER

Enriches the leads you bring.

Bring leads by CSV or managed intake. With your enrichment keys (Apollo, Clay, Prospeo) it fills in role, company, and signal data, dedupes, scores, and pushes the cleaned list straight into the sequencer.
Lead-List Builder · enriching your import
1/3 · waterfall
EmailCompanyRoleTags
sofia.marin@helmsly.ioHelmslyHead of GTM
SaaSSeries BWebflowSegment
linkedinlinkedin.com/in/sofiamarin
marcus@acme-robotics.comAcme RoboticsVP Engineering
RoboticsSeries C
p.shah@glassflow.studioGlassflow StudiosHead of RevOps
DesignTechSeed
Apollo·Clay·Prospeo487 of your leads enriched
05 · BUILT-IN SEQUENCER

Cadence ships native.

No Smartlead login. No Instantly seat. Multi-mailbox rotation, warmup orchestration, reply detection, and auto-pause all run natively inside your dashboard.
Sequencer · Q2 ICP-A · live pipeline
auto-flow · 5 stages
LEAD1
ENRICHED1
SENT1
OPENED1
REPLIED1
Auto-pause on reply·3 senders rotating·Hover a card to inspect
INTEGRATION TOPOLOGY · 5 SYSTEMS · 1 PIPELINE
From outbound to deal, in one place.
  1. Outbound sent
    EMAIL BISON / INSTANTLY
  2. Reply detected
    REPLY AGENT · CLASSIFIED
  3. Contact created
    HUBSPOT / SALESFORCE / PIPEDRIVE
  4. Deal opened
    AUTO IF POSITIVE
  5. Activity logged
    SLACK / IN-APP / WEBHOOK
Workstation — monitor and keyboard at the operator's desk
THE INSTALL · 14 DAYS

14 days. 5 milestones.

From kickoff to live sequence. The schedule we run on every install.
  1. D01
    KICKOFF

    Scope, access, ICP brief

    90-min kickoff. We pull access — domains, DNS, Slack, your enrichment + LLM accounts. You write nothing.

  2. D03
    INFRASTRUCTURE

    Sender domains warming, inboxes provisioned

    SPF/DKIM/DMARC. Sequencer wired into your dashboard. Reply Slack channel live. We do this in the background.

  3. D06
    AGENT TRAINING

    ICP and Copywriter Agents fed your tone

    First angle hypotheses generated and reviewed line by line. You sign off on the brief; we tune the agents.

  4. D09
    DRY RUN

    First sequence built, sent to seed list

    You review every variant end-to-end. We tune deliverability before a prospect sees anything.

  5. D14
    GO LIVE

    Sequence on. Operator briefed. You own it.

    Sequence turns on at low volume. Your operator gets a 60-minute walkthrough. Replies start landing in Slack within hours.

MATH

Year one math.

Numbers assume a comparable outbound agency at $8k/mo. Vendor costs are billed to you directly — no markup.
Current agencyReplyArc installYou at month 13
Year 1 cash$96,000$14,000 + ~$8,400 vendors~$8,400 vendors only
Who owns the domains at month 13Agency doesYou doYou do
What survives if you cancelNothingEverythingEverything (no contract)
Lock-inMonthly retainerOne-time + 6moNone
YEAR ONE DELTA
~$0 saved

Vendor costs (sending, enrichment, LLM keys) are billed to you directly — we don't mark them up.

Open notebook and pen — the operator's six-month rhythm
SUPPORT · 6 MONTHS

Six months. Then you're solo.

We're in your Slack for system fixes, copy review, deliverability triage, and campaign counsel. By month seven your operator runs the show alone.
    M1
    We install
    M2
    First sends + tuning
    M3
    Operator takes the keys
    M4
    Angles and deliverability
    M5
    Iterate on what's working
    M6
    Operator runs it alone
Slack channel · always-onBi-weekly office hoursSystem fixes · no SOW
WHAT THE INSTALLS ARE DOING · AS OF MAY 2026
0+
Emails delivered

Across the Q2 install cohort, last 90 days.

0%
Average open rate

Measured at the sender level; warmed mailboxes only.

0.2%
Average reply rate

Positive + neutral classifications. OOO and bounces excluded.

Verified against dashboard aggregates · refreshed quarterly

FAQ

Common questions.

What exactly do you install?
Four trained agents (ICP, copywriter, reply, lead-list builder), a built-in sequencer, and an operator dashboard. All inside your stack — your domains, your inboxes, your DB. We also wire up deliverability, Slack triage, and the bi-directional inbox.
What do I have to pay for outside of you?
Sending infrastructure (Mailreef-class), enrichment (Apollo / Clay), and any LLM keys (OpenAI / Anthropic) you want the agents to use. You hold all of those accounts directly — we don't mark them up.
Why cold email only?
Because it's the channel where infrastructure ownership matters most and where our pattern library is deepest. We build, ship, and support cold email — full stop. A system that does one channel cleanly beats a system that does three messily.
What does the 6 months of support cover?
An always-on Slack channel for system fixes, copy reviews, deliverability triage, and campaign counsel. Bi-weekly office hours. We're your second-line engineer for the whole window — no SOWs, no per-incident billing.
Who runs it after handoff?
A part-time operator on your team. Could be a marketer, a junior SDR, or a founder who wants a few hours a week of pipeline ownership. The dashboard is built for them — not for engineers.
What happens after month 6?
You own it outright. No retainer continues. If you want us back for a refresh, an angle reset, or a CRM connector install, that's a separate fixed-fee engagement.
BUILT BY
Jacob
Founder · @jacob-replyarc

I've spent the last few years building outbound systems for 150+ teams — inside other people's accounts, on other people's domains, with other people's playbooks. ReplyArc is the version I wished existed back then: you own the system, you keep the leverage, I'm out by month seven. Book 20 minutes and I'll tell you, honestly, whether an install is the right call right now. — Jacob

Talk to Jacob directly
20 MIN · NO PITCH

Book the call.

Twenty minutes. We'll tell you, honestly, whether an install is the right call right now — or whether you should keep renting an agency for another quarter.

Book a callSee install pricing