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Cold email agencies · Outbound sales agencies · US and UK

Cold email agency ten outbound firms, compared

A cold email agency finds the companies you should sell to, writes to the right people there, keeps the mail out of spam, and books meetings for your sales team.

This page compares ten outbound sales agencies we checked on their own websites on October 16, 2026, with published prices where they exist.

It also covers what most lists skip: the deliverability rules Google, Yahoo and Microsoft now enforce, US CAN-SPAM and UK PECR, and the contract terms that separate a good outbound agency from an expensive list blast.

See the agencies →Book a 15-minute call

Reviewed by Dan Keegan, GTM Quest · October 16, 2026 · 39 sources linked below

How an outbound engagement runswhat a good agency does, in order

  1. 01ICP, signals and offerWEEK 1WHO · WHY NOW · WHAT
  2. 02Domains, inboxes, DNSWEEKS 1 TO 3SPF · DKIM · DMARC · WARM-UP
  3. 03First sequences liveWEEKS 3 TO 4EMAIL · LINKEDIN · PHONE
  4. 04Meetings and iterationWEEKLYREPLIES · MEETINGS · PIPELINE

Agencies compared10

$53,088
maximum civil penalty per email that breaks CAN-SPAM, with no B2B exemption
FTC, CAN-SPAM compliance guide ↗
0.3%
spam-complaint rate Gmail and Yahoo tell senders never to reach
Google, Email sender guidelines ↗
344
cold emails the average rep sends to land one meeting
Gong with 30 Minutes to President's Club ↗
2.0% vs 0.5%
median reply rate, inboxes sending 1 to 20 a day vs 101 to 200 a day
Woodpecker cold email benchmarks ↗
A card titled Cold email agency, with four labeled blocks: Targeting, Infrastructure, Copy and sequences, Compliance.
Four jobs every outbound agency should own: who to contact, how the mail gets delivered, what it says, and which laws it follows.

01/ the service

What a cold email agency does and what it should own

A cold email agency runs outbound prospecting by email for B2B companies.

In practice that means four jobs: building the target list, setting up and protecting the sending infrastructure, writing and testing the sequences, and handling replies until a meeting is in your calendar.

Most of the firms below now call themselves outbound agencies or outbound sales agencies, because email alone rarely carries a campaign.

They add LinkedIn, phone and sometimes direct mail.

The email part is still where most of the technical risk sits: one badly set-up domain can put your company's own mail in spam.

The good ones start with who to contact and why now, not with volume.

A short list of companies showing a real reason to buy will outperform a long list of job titles.

The section on signal-led outbound shows the data.

Cold email agency, appointment setting agency, outsourced SDR: what is the difference?

The labels overlap.

A cold email agency sells the email channel and its infrastructure.

An appointment setting agency sells booked meetings and usually adds phone.

An SDR agency or outsourced SDR service rents you a sales development rep, often priced per head.

A lead generation agency may do all of this, or just sell lists.

Ask what you are paying for: activity, meetings, or people.

02/ four models

Outbound agency models what you are actually buying

ModelWhat you pay forBest whenWatch for
Cold email agencyInfrastructure, lists, copy and campaign managementYou have a clear ICP and a sales team ready to take meetingsVolume without targeting; domains registered in the agency's name
Appointment setting agencyQualified meetings booked into your calendarYou want a predictable meeting count and can define "qualified"Meetings that do not match your ICP; no-show rates
Outsourced SDR (SDR agency)A dedicated rep, priced per head per monthYou need phone plus email and want a person, not a campaignRamp time and rep turnover
Full-funnel outbound or GTM agencyTargeting, outbound, ABM and the data underneathOutbound needs to work with content, ads and CRMScope creep; pay for what you will use

For the wider category, see our guide to B2B lead generation agencies.

For the AI version of the SDR, see AI SDR.

03/ the agencies

Cold email and outbound agencies checked October 16, 2026

Ten firms that run cold email and outbound for B2B companies, from UK managed-outreach shops to US SDR teams.

Each line is what the firm says on its own site.

If you want outbound as part of a full go-to-market build rather than a stand-alone channel, that is what a go-to-market agency like ours does.

UK-based

01

GTM Quest

Our firm

London, UK · Founded 2024 · Dan Keegan, founder

A London go-to-market agency that runs cold email as one channel in a wider pipeline system: ICP and offer first, then buying signals in Clay, sending domains registered in the client's name with SPF, DKIM and DMARC, short signal-led sequences with LinkedIn, and reporting on meetings held and pipeline. Covers US CAN-SPAM and UK PECR rules.

Best for: B2B companies with product-market fit that want signal-led outbound they own, not rented volume

gtm.questB2B lead generation →GTM engineer →
Book a 15-minute call →

Services

ICP and offerSignal-led outbound (Clay)Sending infrastructure and deliverabilityLinkedIn outreachCRM routing and RevOpsFractional GTM leadership

Methods

The Quest System (Neon + Clay + Claude Code)

Published pricing

Scoped and quoted in writing after the discovery call.

02

Sopro

Brighton, UK (US office in Miami Beach) · Ryan Welmans and Rob Harlow, founders

A fully managed B2B prospecting service that began in email prospecting and now runs email, LinkedIn, display ads, phone and gifting, with intent tracking from website visits and a live reporting portal. Replies go straight to the client's team.

Best for: UK and US B2B firms that want hands-off, multichannel outreach with transparent reporting

Visit sopro.io ↗Profile in our directory →Sopro pricing ↗

Services

Email outreachLinkedIn outreachDisplay ad audience syncIntent tracking and IP matchGiftingReporting portal

Published pricing

Sopro says "pricing starts at around $3.8K per month", with no minimum contract. Source ↗

Checked 2026-10-16: Sopro · Sopro pricing · Sopro, About us · The Sopro Group (Sopro Holdings Ltd, Brighton)

03

Punch!

UK (UK and US SDR teams) · Chris Muldoon, CEO

A full-funnel outbound agency for mid-market and enterprise B2B, combining its HotSauce buying-signal data, AI-agent outreach across five channels and human SDRs, with ABM for target accounts. Plans are set by qualified opportunities a month.

Best for: Mid-market and enterprise B2B teams wanting signal-led SDRs plus ABM in the UK and US

Visit punchb2b.com ↗Punch! pricing plans ↗

Services

Human SDRs (phone, email, LinkedIn)Signal-led prospectingAgentic outreachAccount-based marketingDirect mail and gifting

Methods

HotSauce buying signalsPriority Intent

Published pricing

Not published.

Checked 2026-10-16: Punch! · Punch! pricing · Punch!, Our people

04

Air Marketing

Exeter, UK (registered office) · Founded 2016

A UK outsourced sales and lead generation agency whose SDRs run outbound, appointment setting, multilingual telemarketing and inbound lead handling, backed by sales leadership, data and process.

Best for: UK B2B firms that want phone-led outsourced SDRs alongside email

Visit air-marketing.co.uk ↗SDR cost calculator ↗

Services

Outsourced SDRsAppointment settingMultilingual telemarketingInbound lead qualificationHubSpot RevOps

Published pricing

Not published.

Checked 2026-10-16: Air Marketing · Companies House 10002410

US and international

05

ColdIQ

International (ColdIQ LLC; HQ not stated on its site) · Michel Lieben, founder and CEO

A hybrid firm: a done-for-you outbound and cold email agency built on Clay (it describes itself as a Clay Elite partner), and a separate GTM data API product for teams that want to run outbound themselves.

Best for: B2B tech and SaaS teams that want a Clay-heavy outbound engine built and run for them

Visit coldiq.com ↗Profile in our directory →ColdIQ on outbound lead generation ↗

Services

Cold email infrastructureClay data enrichment and signalsLinkedIn outreachContent and ads (GTM flywheel)

Methods

GTM Flywheel

Published pricing

Not published.

Checked 2026-10-16: ColdIQ · ColdIQ agency page · ColdIQ, Best cold email agencies (its own description)

06

Belkins

United States · Founded 2017 · Vladyslav Podoliako, co-founder and CEO; Michael Maximoff, co-founder

A B2B appointment setting and outbound lead generation agency running omnichannel campaigns (cold email, intent-based calling, LinkedIn, WhatsApp, paid ads) on monthly retainers sized by appointments a year. It lists Folderly, a deliverability platform, among its own tools.

Best for: B2B companies that want a set number of booked appointments a year across channels

Visit belkins.io ↗Profile in our directory →Belkins plans and pricing ↗

Services

Cold email outreachIntent-based cold callingLinkedIn outreachOutsourced SDRsDeliverability consultingAccount-based marketing

Published pricing

Not published.

Checked 2026-10-16: Belkins · Belkins plans and pricing · Belkins, About us · Belkins: from agency to group

07

Martal Group

Toronto, Canada (sales reps in the US, Canada, EU and LATAM)

An outsourced B2B sales and lead generation company with an onshore team of sales executives running email, LinkedIn and calls, starting with a three-month pilot and a published average monthly production funnel.

Best for: Tech and B2B firms wanting onshore SDRs and sales executives, with a pilot before committing

Visit martal.ca ↗Profile in our directory →Martal pricing tiers ↗

Services

Outbound lead generationCold emailingCold callingLinkedIn lead generationSales outsourcingAccount management

Published pricing

Not published.

Checked 2026-10-16: Martal Group · Martal pricing

08

CIENCE

United States

A managed lead generation and GTM execution firm that sells a one-time GTM setup sprint, a monthly strategic team and its graph8 platform, with SDR capacity added per head and a per-meeting fee set from an agreed ROI goal.

Best for: Teams that want published, itemised pricing and the option to add SDRs by region

Visit cience.com ↗Profile in our directory →CIENCE pricing ↗

Services

GTM system setupIntent and visitor-based campaignsAI-assisted outreachSDR capacity (offshore, Europe, US)Revenue system builds

Methods

graph8 platform

Published pricing

GTM setup $5,000 one-time; strategic team $2,000 a month; graph8 platform $499 a month ($7,499 the first month). SDRs $1,500 to $6,500 a month by level and region; per-meeting fee set from the agreed ROI goal. Source ↗

Checked 2026-10-16: CIENCE · CIENCE pricing

09

Leadium

Las Vegas, Nevada (address on its site); US-based SDR team · Founded 2015 · Kevin Warner, co-founder and CEO

A sales development agency with a fully US-based SDR team running email, cold calling, LinkedIn and gifting for appointment setting, on month-to-month contracts. It states plainly that it does not guarantee appointment outcomes.

Best for: US B2B companies that want phone-first, US-based SDRs without a long contract

Visit leadium.com ↗Profile in our directory →Leadium pricing FAQ ↗

Services

Appointment settingCold callingPersonalised emailLinkedIn sellingLead researchOutbound consulting

Published pricing

Not published.

Checked 2026-10-16: Leadium · Leadium pricing and FAQ · Leadium, About us

10

SalesCaptain

HQ not stated on its site (works across the US and Europe)

A B2B outbound and GTM agency running cold email and LinkedIn campaigns on custom Clay and AI-agent workflows, plus inbound-led outbound for MQLs and RevOps. It says it scales campaigns to 10,000+ leads a month.

Best for: SaaS, B2B services and agencies wanting Clay-built cold email and LinkedIn campaigns

Visit salescaptain.io ↗

Services

Cold emailLinkedIn outreachClay workflowsInbound-led outboundRevOps

Published pricing

Not published.

Checked 2026-10-16: SalesCaptain

Nobody paid to appear here.

We list firms whose core offer is outbound: cold email, LinkedIn and phone run for clients.

Software tools (sequencers, data platforms) are excluded.

Prices appear only where a firm publishes them on its own website.

Results quoted on agency sites are their claims, not ours.

04/ deliverability

Cold email deliverability fundamentals what any agency must get right

This is where outbound programmes fail first.

Ask any agency how it handles each step, and who owns the domains afterwards.

SPF: say who may send for you

SPF is a DNS record listing the servers allowed to send mail for your domain.

Google tells senders the record should include all email senders for your domain, or messages from missing senders are more likely to land in spam.

Google Workspace caps a user at 2,000 messages a day and 3,000 external recipients.

Those are hard limits, not targets.

A cold email programme should never come near them.

05/ mailbox providers

Google, Yahoo and Microsoft sender rules the 2024 to 2025 requirements

Gmail and Yahoo began enforcing new rules for bulk senders in February 2024; Outlook.com followed in May 2025.

Checked on each provider's own page today.

RequirementGoogle (Gmail)YahooMicrosoft (Outlook.com)
Who counts as a bulk sender5,000 or more messages a day to personal Gmail accountsBulk senders (Yahoo sets separate rules for all senders and for bulk)More than 5,000 emails a day to Outlook.com accounts
AuthenticationSPF and DKIM, plus DMARC (p=none allowed)Both SPF and DKIM, and a valid DMARC policy of at least p=noneSPF, DKIM and DMARC; p=reject recommended
Spam-complaint ceilingBelow 0.10%, never 0.30% or higherKeep your spam rate below 0.3%Not stated as a rate
One-click unsubscribeRequired for marketing and subscribed messagesRequired via a list-unsubscribe header (RFC 8058)Not in the authentication requirement
Honor unsubscribes within48 hours2 daysNot stated
What happens if you failRejections or spam foldering; stricter enforcement since November 2025Enforcement began February 2024Junk folder, then rejection (error 5.7.515)

The fine print matters for B2B. Google says its sender guidelines don't apply to messages sent to Google Workspace accounts, only to personal Gmail.

Most cold email goes to company domains.

But the rules are the clearest published standard for what inbox providers expect, and authentication costs nothing, so a serious agency meets them everywhere.

Google also counts all mail from the same primary domain toward the 5,000, and once you are classed as a bulk sender, that status is permanent.

A layered diagram of a cold email sending setup, from the main company domain down through sending domains, inboxes, authentication records, warm-up and daily volume caps.
Your main domain stays out of cold outreach. Separate sending domains carry SPF, DKIM and DMARC, a few inboxes each, warm-up first, and low daily volume per inbox.

06/ volume

Why more volume per inbox gets fewer replies the data from two sending platforms

Woodpecker publishes its own platform data on this.

Across 7,676 mailboxes, those averaging 1 to 20 emails a day had a 2.0% median reply rate, four times the 0.5% of mailboxes sending 101 to 200.

Woodpecker notes the medians are per mailbox and that the sample mixes use cases, so read it as direction, not a law.

Gong's own benchmark points the same way: sending a high volume of emails often results in lower reply rates, and in its 2024 data manual emails had a 2.1% median reply rate against 1.1% for automated ones.

A bar chart showing median cold email reply rate falling from 2.0% for inboxes sending 1 to 20 emails a day to 0.4% for inboxes sending 201 to 500 a day.
Median reply rate per mailbox, by average emails sent per day. Source: Woodpecker cold email benchmarks, 7,676 mailboxes that sent at least 500 emails in 90 days.

07/ two approaches

Signal-led vs volume outbound how the best agencies differ

Signal-led outboundVolume outbound
Who gets contactedCompanies showing a reason to buy now: hiring, funding, a new leader, engagement with your contentEveryone matching a title and industry filter
List sizeHundreds a month, refreshed dailyThousands a month, refreshed rarely
MessageOpens with the signal and the problem it impliesOpens with the product
Infrastructure loadLow volume per inboxMany inboxes pushed hard
Main riskSignals that sound clever but do not predict buyingSpam complaints, burned domains, a brand people block

→ Fewer, better-timed emails. It is how we run outbound, built on Clay. See GTM engineer.

Gong's study with Jason Bay found the average rep had to send 344 cold emails to land one meeting, that the top 10% of reps book 8.1x more meetings than average, and that pitching in a cold email cuts reply rates by up to 57%.

On signals specifically, one vendor case study is worth reading with its source in mind: Smartlead reports that Trigify, a signals platform, ran a campaign to over 3,000 contacts with a 25% reply rate, 38% of replies positive.

That is a tool vendor's account of a customer, not an independent study.

08/ US rules

Cold email law in the US CAN-SPAM, including B2B

QuestionWhat the FTC saysSource
Does CAN-SPAM cover B2B cold email?Yes. The law makes no exception for business-to-business email.FTC compliance guide
What is the penalty?Up to $53,088 for each separate email in violation.FTC; amount set in 16 CFR 1.98
What must each email include?Accurate header and From details, a non-deceptive subject line, a clear disclosure that it is an ad, your valid physical postal address, and a clear way to opt out.FTC
How fast must we honor an opt-out?Within 10 business days. The opt-out must keep working for at least 30 days after sending.FTC
If we hire an agency, who is liable?Both. You cannot contract away your legal responsibility; the company promoted and the company sending may both be held responsible.FTC

This is not legal advice.

CAN-SPAM is opt-out, not opt-in: you may email a business contact without prior consent if every message follows the rules above.

09/ UK rules

Cold email law in the UK PECR and UK GDPR

QuestionWhat the ICO saysSource
Can we cold email a company without consent?Yes, if it is a corporate subscriber (companies, LLPs, Scottish partnerships, some government bodies): PECR's electronic mail rule does not apply to them.ICO, B2B marketing
Who is treated like an individual?Sole traders and some other partnerships. You need their consent, or the soft opt-in, before emailing them.ICO, B2B marketing
What if we cannot tell which it is?Treat the address as an individual subscriber and follow the stricter rules.ICO, B2B marketing
What must every B2B email include?Do not disguise who you are, and give a valid address to opt out. The ICO says you should comply with an opt-out.ICO, B2B marketing
Does UK GDPR apply to named contacts?Yes. You need a lawful basis; where PECR does not require consent, legitimate interests is likely appropriate, after the three-part test.ICO, B2B marketing
Do tracking pixels count?Yes. Pixels that store or read information on the reader's device fall under PECR's cookie rules, for every type of subscriber.ICO, B2B marketing
What are the fines now?Since February 5, 2026 the ICO can fine up to £17.5 million or 4% of global turnover under PECR.ICO, DUAA statement

The ICO notes its B2B guidance is under review after the Data (Use and Access) Act.

This is not legal advice.

Calls and LinkedIn messages have their own rules; see our lead generation page.

10/ what it costs

Cold email agency pricing retainer, per meeting, per head

Most agencies quote after a call.

These are the models, with examples only where the firm publishes them on its own site.

ModelHow it worksPublished exampleSource
Monthly retainerA flat fee for the team and campaigns; tools sometimes includedSopro: "pricing starts at around $3.8K per month", no minimum contractSopro pricing
Setup plus monthlyA one-off build, then a monthly team and platform feeCIENCE: $5,000 setup, $2,000 a month for the team, $499 a month for its graph8 platform; $7,499 the first monthCIENCE pricing
Per meetingA fee for each qualified meeting heldCIENCE: per-meeting fee "calculated from the agreed ROI goal, typically 4x ROI"CIENCE pricing
Per SDR (outsourced SDR)A monthly price per rep, by location and levelCIENCE SDR capacity: $1,500 to $3,500 offshore, $2,500 to $4,500 Europe, $4,500 to $6,500 US a monthCIENCE pricing
Pilot then subscriptionA fixed trial period before a rolling contractMartal: 3-month pilot, then a flat monthly fee (price on request)Martal pricing
Appointment packagesTiers set by meetings per year or opportunities per monthBelkins: 30+, 100+ or 200+ appointments a year; Punch!: 4 to 6 up to 30+ qualified opportunities a month (prices on request)Belkins, Punch!
GTM QuestScoped and quoted in writing after a callFees, data and sending tools as separate linesNot applicable

What drives the price: how many channels, whether phone is included, the cost of data, how many inboxes and domains, and whether you are buying a system you keep or activity you rent.

11/ choosing

Which pricing model fits you? pick your situation

What does your sales team need most right now?

Per meeting

Pay per meeting, with a tight definition

Good when you can define a qualified meeting precisely and your AEs have capacity.

Agree the definition, the no-show rule and who disputes what before you sign.

  • ✓ Written ICP and qualification rules
  • ✓ No-show and reschedule policy
  • ✓ Meetings logged in your CRM

Risk: the agency optimises for meetings that count, not deals that close.

12/ before you sign

How to choose a cold email agency eight questions to ask

01

Whose domains and inboxes are they?

They should be registered to your company, so you keep them if you leave.

02

How do you authenticate and warm up?

Expect SPF, DKIM and DMARC on every sending domain, a warm-up period, and a stated cap per inbox per day.

03

What is your spam-complaint rate?

Ask for Postmaster Tools data.

Google wants senders below 0.10% and never at 0.30%.

04

Where does the list come from?

Named data sources, verification before sending, and how sole traders are handled under UK PECR.

05

What signals do you use?

Which events trigger contact, and how quickly after the event the first email goes out.

06

What counts as qualified?

A written definition you agree before launch, checked against your CRM, not the agency's dashboard.

07

Who writes the copy?

Named people, samples in your market, and how many variants are tested.

08

How do we leave?

Notice period, and handover of domains, lists, sequences and reply history.

13/ walk away

Red flags in an outbound agency proposal what we would question

Guaranteed meetings with no definition

Leadium, for one, says it does not guarantee appointment outcomes because too many factors affect them.

A vague guarantee is a warning, not comfort.

Sending from your main domain

One complaint spike can push your everyday email into spam.

Cold email belongs on separate domains.

"Unlimited" volume

Woodpecker's platform data shows reply rates fall as volume per inbox rises.

More sends is not more pipeline.

No unsubscribe line

CAN-SPAM requires an opt-out in every commercial email, and you stay liable for what the agency sends.

Bought lists, no verification

Google tells senders not to purchase email addresses.

Unverified lists bounce, and bounces damage domain reputation.

Reporting stops at opens

Google says it doesn't track open rates and can't verify the ones third parties report.

Ask for replies, meetings held and pipeline.

14/ GTM Quest

How GTM Quest runs outbound inside the Quest System

We are a GTM agency, not a cold email shop.

Outbound is one channel in a pipeline system we build on Neon Postgres, Clay and Claude Code, and hand over or run with you.

  1. 01

    ICP and offer

    Which companies, which people, which problem, and the one offer worth a reply. Written down before any data is bought.

    WEEK 1
  2. 02

    Signals in Clay

    Hiring, funding, leadership changes, engagement with your content and site visits, scored against your closed-won deals and stored in Postgres.

    WEEKS 1 TO 2
  3. 03

    Infrastructure in your name

    Separate sending domains registered to you, SPF, DKIM and DMARC, warm-up, and a low daily cap per inbox.

    WEEKS 1 TO 3
  4. 04

    Sequences that start with the signal

    Short emails that open with the reason for writing now, plus LinkedIn touches. UK sole traders filtered out unless consent applies.

    WEEK 3 ON
  5. 05

    Replies routed to sales

    Positive replies go straight to the right rep with the context attached. Opt-outs are suppressed everywhere at once.

    DAILY
  6. 06

    Measured on pipeline

    Meetings held, opportunities and pipeline by signal, reviewed with sales. Signals that do not convert get dropped.

    WEEKLY

For outbound as part of a wider motion, see our B2B lead generation service and ABM agency page.

If you want a senior lead to own the plan, talk to a GTM consultant.

15 minutes · video or phone

Book 15 minutes on your outbound

Tell us who you sell to and what outbound you run today. We come back with what we would fix first, whether or not you hire us.

  1. 0115 minutes, video or phone
  2. 02We look at your ICP, signals and sending setup
  3. 03A written next step after the call
  4. 04US and UK rules covered
Open the calendar in a new tab →

Pick a day that suits · live availability

15/ questions

Cold email agencies FAQ

What B2B teams ask before they hire an outbound or cold email agency.

It builds your target list, sets up and protects the sending domains and inboxes, writes and tests the sequences, and books meetings from the replies.

See what a cold email agency does.

It depends on what you need: managed outreach (Sopro), booked meetings (Belkins, Martal), US-based SDRs (Leadium), or signal-led outbound inside a wider GTM build (GTM Quest).

See the agencies.

One that starts with your ICP and buying signals, sends from domains you own, and reports on meetings held and pipeline rather than opens.

Use the eight questions to compare them.

Sopro says its pricing starts at around $3.8K per month; CIENCE publishes $7,499 for the first month including setup.

Most others quote after a call.

See pricing.

Yes, if every message follows CAN-SPAM: accurate headers, an honest subject line, a postal address and a working opt-out honored within 10 business days.

The FTC says there is no exception for B2B email.

Yes to corporate subscribers without prior consent under PECR, but sole traders and some partnerships need consent or the soft opt-in, and UK GDPR still applies to named contacts (ICO).

See UK rules.

Separate sending domains in your name, SPF, DKIM and DMARC on each, a warm-up period, and a low daily cap per inbox.

Smartlead advises 50 a day per mailbox or fewer.

See deliverability.

Google tells senders to stay below 0.10% and never reach 0.30%; Yahoo says keep it below 0.3%.

See sender rules.

Low.

Instantly's guide says 30 to 50, Smartlead says 50 or fewer, and Woodpecker's data shows the highest median reply rate at 1 to 20 a day.

An appointment setting agency sells booked meetings; an SDR agency (outsourced SDR) rents you a rep priced per head.

See outbound agency models.

Contacting companies when an event suggests they may buy (hiring, funding, a new leader, engagement with your content) instead of emailing everyone on a title list.

See signal-led vs volume.

Hire when you need it running in weeks and lack the deliverability skills; build when outbound will be a core channel for years.

Either way, keep the domains and data in your name.

Book 15 minutes · London · US and UK

Fewer emails, better timed. Outbound that sales actually wants.

A 15-minute call, a written next step, and an outbound system built on your data and domains. We run it with you or hand it over.

Book a call →

16/ related

Keep exploring

gtm.quest

GTM Quest

The GTM agency behind this page: strategy, systems and pipeline.

gtm.quest

B2B lead generation agencies

Outbound and lead generation, including the full UK rules.

gtm.quest

GTM engineer

The role that builds signal-led outbound in Clay.

gtm.quest

AI SDR

What AI sales development tools do, and what they do not.

gtm.quest

ABM agency UK

Account-based marketing for named target accounts.

gtm.quest

Demand generation agencies

Create the demand outbound converts.

gtm.quest

Revenue operations agencies

CRM, routing and the data underneath outbound.

gtm.quest

What is a go-to-market agency?

How a full GTM partner differs from a channel agency.

17/ sources

Every source on this page

Each figure above links to one of these. All were opened and checked on October 16, 2026.

  1. FTC, CAN-SPAM Act: A Compliance Guide for Businessftc.gov
  2. Google, Email sender guidelines (Gmail Help)support.google.com
  3. Gong, Does cold email even work any more? (Jason Bay, July 2025)gong.io
  4. Woodpecker, Cold email benchmarks (Aug 2026)woodpecker.co
  5. Instantly Help Center, Instantly cold email strategyhelp.instantly.ai
  6. Smartlead, How many cold emails per day per mailbox (benchmarks)smartlead.ai
  7. Google Workspace Admin Help, Gmail sending limitssupport.google.com
  8. Yahoo Sender Hub, Sender best practicessenders.yahooinc.com
  9. Outlook.com Postmaster, Policies (high-volume sender requirements, May 2025)postmaster.outlook.com
  10. Google, Email sender guidelines FAQ (Gmail Help)support.google.com
  11. Gong Help, Engage analytics: benchmarks and best practices (2024 data)help.gong.io
  12. Smartlead, Case study: Trigifysmartlead.ai
  13. eCFR, 16 CFR 1.98 Adjustment of civil monetary penalty amountsecfr.gov
  14. ICO, Business-to-business marketingico.org.uk
  15. ICO, Statement on the commencement of the Data (Use and Access) Act (Feb 2026)ico.org.uk
  16. Sopro, Pricingsopro.io
  17. CIENCE, Pricingcience.com
  18. Martal Group, Pricingmartal.ca
  19. Belkins, Plans and pricingbelkins.io
  20. Punch!, Pricingpunchb2b.com
  21. Leadium, Pricing and FAQleadium.com
  22. Soprosopro.io
  23. Sopro, About ussopro.io
  24. The Sopro Group (Sopro Holdings Ltd, Brighton)foundershub.co.uk
  25. Punch!punchb2b.com
  26. Punch!, Our peoplepunchb2b.com
  27. Air Marketingair-marketing.co.uk
  28. Companies House 10002410find-and-update.company-information.service.gov.uk
  29. ColdIQcoldiq.com
  30. ColdIQ agency pagecoldiq.com
  31. ColdIQ, Best cold email agencies (its own description)coldiq.com
  32. Belkinsbelkins.io
  33. Belkins, About usbelkins.io
  34. Belkins: from agency to groupbelkins.io
  35. Martal Groupmartal.ca
  36. CIENCEcience.com
  37. Leadiumleadium.com
  38. Leadium, About usleadium.com
  39. SalesCaptainsalescaptain.io