Best Cold Outreach Agencies in 2026: An Honest Ranking

Search "best cold outreach agencies" and you get a hundred listicles where every agency is ranked number one. That helps no one. This is a real ranking. We run cold email and LinkedIn outreach for a living, so we know what separates an agency that books qualified meetings from one that burns your domains and sends you a dashboard of vanity metrics.

Cold outreach in 2026 is channel-agnostic. The best campaigns run email and LinkedIn as one coordinated motion, not two disconnected channels. So this list covers agencies that do both well, plus a few specialists worth knowing about. We researched current pricing and positioning for each one. Where a price is public, it is here. Where it is not, we say "pricing on request" rather than make a number up.

How we ranked these agencies

Three criteria, stated up front so you can judge our picks honestly.

• Execution quality over headcount. Most agencies rent you junior reps or sell you software seats. The ones that win build an engineered system: warmed domains, verified data, tested copy, tight reply handling. Deliverability is the hidden variable that decides whether your campaign ever reaches a human.

• Multichannel by default. Email plus LinkedIn beats either channel alone for most B2B targets. An agency that only does one channel is fine for some buyers, but it caps your reach.

• Transparent reporting and fair contracts. You should see reply rates, positive reply rates, meetings booked, and pipeline value. Not open rates. Apple Mail Privacy Protection broke open rates years ago, and any agency still quoting them as a primary metric is hiding behind a number that means nothing.

We benchmark every campaign against the same numbers we hold ourselves to: 3 to 8% positive reply rate, under 2% bounce rate, under 0.1% spam complaint rate, and 40 to 60 sends per mailbox per day. If an agency cannot tell you how it tracks against those, that is a red flag. For the full picture on what good looks like, read our complete guide to B2B cold email in 2026.

The comparison table

1. Built For B2B: best for technical, deliverability-led multichannel outbound

We will be straight about the bias here. Built For B2B is our agency, so read this section knowing that. But the "best for" is specific and honest, and the proof is public.

The wedge is technical execution. Most rivals on this list win on scale or sales headcount. We win on the engineering underneath the campaign. Domains warmed properly over 3 to 4 weeks. Data verified before a single send. Copy tested against real reply data, not gut feel. Email and LinkedIn wired together as one engine, so a prospect who ignores an email might accept a connection request and reply there instead. That is what we mean by multichannel run as one system, not two.

The results are tied to named clients, each with a full write-up:

• $1.3M in qualified pipeline in 45 days for GT Global

• $320K in pipeline in 90 days for Leaptree

• $500K+ in revenue in 60 days from a dormant database for Mercer

• $2M ARR in two years for Global Ocean Logistics

What we are honest about: we are not the cheapest, and we are not built for a founder who wants to spend $400 a month and test the water. The 3-month commitment exists because outbound needs runway. Domain warming alone eats the first month. If you want results in week two, no agency that respects deliverability can promise that, and the ones who do are usually the ones who get your domain blacklisted.

We are also a small, hands-on team by design. That means a founder works on your account, not a junior who rotates off after onboarding. The trade is that we cannot run hundreds of clients at once the way a 1,000-client shop can. If you want a vast vendor with a brand name on every review site, Belkins or CIENCE will suit you better. If you want the people building the system to be the people answering your Slack messages, that is us.

Best for: B2B SaaS, professional services, logistics, and wholesale companies who want an engineered cold email and LinkedIn outreach system run as one motion, with reporting they can actually read. Compare the cost against an in-house SDR with our calculator.

2. Belkins: best for mid-market and enterprise appointment setting

Belkins is one of the largest and most decorated B2B lead generation agencies, and they have earned it. They hold a 4.9 rating on Clutch across 230 reviews and a 4.8 on G2. They report scheduling over 200,000 appointments for close to 1,000 clients, with a 95% client retention rate.

Their model is omnichannel appointment setting. Cold email is the core, supported by LinkedIn connection requests, warm calling based on intent data, and event-based outreach. They publish strong deliverability claims: 99% inbox placement, 60%+ engagement, and 6%+ reply rates. Those reply numbers sit at the top of our 3 to 8% benchmark, which is credible for a team at their scale.

Pricing: from $4,000 a month, with packages built around roughly 1,500 leads a month and 100+ guaranteed appointments a year. Note that the retainer is usually 60 to 70% of your true spend once domains, inboxes, and data tools are added.

Honest limitation: Belkins is built for mid-market and enterprise with longer sales cycles. If you are an early-stage company that needs hands-on, founder-led iteration, you can feel like a small fish in a very large agency. Their strength is process at scale, which is also the thing that makes them less nimble.

Best for: established mid-market and enterprise companies that want a proven, process-heavy appointment-setting machine and can fund it.

3. Martal Group: best for B2B tech wanting SDR plus closing support

Martal Group specialises in outsourced sales development for B2B technology and SaaS companies, from early-stage startups to public firms. What sets them apart is how far down the funnel they go. Their tiered model runs from standard lead generation, to deal closure and onboarding support, to full account management. Few agencies on this list will actually help close.

They blend human SDRs with a proprietary AI platform to run omnichannel outreach, integrate into your CRM, and offer LinkedIn lead gen, cold email, and sales training. Reps typically get productive within a few weeks.

Pricing: custom and retainer-based, starting from around $4,500 a month, with packages reported in the $4,500 to $6,195 range depending on scope. Higher tiers add closing and account management on top of base fees, sometimes with commission on closed-won deals.

Honest limitation: the closing and onboarding layers are valuable but they raise cost and complexity. If you only need meetings booked and you have a strong internal closing team, you may be paying for tiers you will not use. The AI platform is a plus, but it means you are partly buying into their tooling, not just their people.

Best for: B2B tech and SaaS companies that want a partner across the whole funnel, not just the top.

4. SalesHive: best for flat-fee SDR teams with real flexibility

SalesHive built its reputation on transparent, flat-fee pricing and genuinely month-to-month contracts. No long-term lock-in, cancel with 30 days' notice. For buyers burned by 12-month agency contracts, that alone is a draw.

Each plan covers a trained SDR team, a dedicated strategist, their AI platform, data, and tools in one flat fee with no setup charge. They build a custom playbook, write the scripts, and define targeting before billing starts. They run cold email, cold calling, and LinkedIn, and offer both US-based and Philippines-based reps so you can trade cost against local fluency.

Pricing: flat-fee tiers from roughly $4,500 to $12,000 a month. The Philippines Starter plan sits around $4,500, the US Starter around $7,000, with Growth and Crush tiers above that.

Honest limitation: the rep model means quality can vary with who you are assigned, and offshore reps trade cost for local market knowledge. The flat fee is clean, but it is a people-led service, so deliverability engineering is not the headline the way it is for a technical-first shop.

Best for: companies that want a flexible, no-lock-in SDR team and value contract terms as much as channel mix.

5. SalesBread: best for founder-led LinkedIn outreach with a guarantee

SalesBread runs a focused, founder-led LinkedIn lead generation service with a clear promise: one qualified lead per day, or 20+ a month, or your money back. That guarantee is rare and it forces discipline on targeting. They include premium data tools like ZoomInfo and Sales Navigator in the fee, so you are not buying separate licences.

They run month-to-month with no long-term contract, and pricing is customised around targeting, volume, and inbox management. Their content is some of the most useful in the space, which signals a team that actually understands the craft of personalised outreach.

Pricing: from $3,000 a month plus a one-time setup fee for one primary LinkedIn account. More accounts or wider scope cost more.

Honest limitation: SalesBread is LinkedIn-first. That is a strength for precision and a limit on reach. If your buyers are not active on LinkedIn, or you need email volume to fill a wide funnel, a single-channel shop will cap your pipeline. They are small and hands-on, which is the appeal and the ceiling.

Best for: founders and small teams who want precise, guaranteed LinkedIn leads and value hands-on attention over scale.

6. CIENCE: best for large-scale, high-volume programmes

CIENCE is a heavyweight, with 2,500+ clients across 250+ industries and a full platform plus managed services model. For a large company that needs serious volume across email, LinkedIn, and phone, CIENCE has the infrastructure to deliver it. They offer a self-serve platform tier as well as full managed services.

Pricing: opaque and wide. Public figures put the platform from around $2,400 a month and managed services from around $2,900, with full programmes commonly running $3,000 to $15,000+ depending on volume and scope.

Honest limitation: reviews are genuinely polarised. G2 and Clutch carry strong results alongside hard complaints about lead quality, offshore SDR fluency, and cost per qualified lead exceeding $300 to $400 because of percentage-based fees. This is an agency where the experience depends heavily on the team you are assigned. Go in with tight success criteria and a clear exit.

Best for: large organisations that need high-volume, multichannel programmes and have the internal rigour to manage a big vendor closely.

7. Cleverly: best for budget-conscious LinkedIn-first outreach

Cleverly is the most affordable entry point on this list, which is exactly why it makes the ranking. Their LinkedIn plans are productised and cheap, which suits small businesses testing outbound for the first time without a large budget.

Pricing: LinkedIn plans run $397 a month (Silver), $697 (Gold), and $997 (Platinum), each around 600 prospects a month. The Platinum tier adds a dedicated appointment setter and inbox management. They also offer cold email from $1,995 a month and cold calling from $3,995.

Honest limitation: low price means a more templated, less bespoke service. You will usually need Sales Navigator on top (around $100 a month), and there is often a 3-month minimum that is not loud in the marketing. The cheaper tiers are close to a managed tool rather than a strategic partner. Fine for a first test, thin for a company that needs real pipeline.

Best for: SMBs and solo founders who want an affordable, productised LinkedIn-first programme to validate the channel.

8. Lemlist partner agencies: best for teams who want the platform run for them

One clarification, because buyers get this wrong. Lemlist is a software platform, not a done-for-you agency. It is excellent software, known for personalised images, landing pages, and multichannel sequences. But if you want it run for you, you work with one of its certified partner agencies, not Lemlist itself.

Those partners handle setup, technical configuration, sequence building, and campaign management on top of the Lemlist platform. Pricing varies by partner, starting from around €500 for sequence setup and rising for ongoing management.

Honest limitation: quality depends entirely on which partner you pick, and you are still paying for the Lemlist subscription underneath. There is no single accountable brand the way there is with a full-service agency. This route suits teams that like Lemlist specifically and want help operating it, rather than buyers who want one company owning the outcome.

Best for: teams committed to the Lemlist platform who want a partner to set it up and run it.

How to choose the right cold outreach agency

The "best" agency is the one that fits your stage, budget, and channel mix. A scale-up with a strong closing team needs a different partner than a seed-stage SaaS founder who needs meetings and nothing else. Before you sign anything, run the four tests below. They take an afternoon and they will save you the £20,000 to £30,000 that a bad six-month engagement costs.

Ask how they handle deliverability

This is the fastest way to separate engineers from copywriters. A serious agency warms domains for 3 to 4 weeks, keeps sends to 40 to 60 per mailbox per day, verifies data to hold bounce under 2%, and watches spam complaints below 0.1%. If they cannot explain their warming process or they shrug at bounce rates, walk. Our cold email deliverability fix guide is the checklist to grill them with.

Demand the right metrics

Positive reply rate, meetings booked, and pipeline value. Not open rates. If an agency leads with open rates, they are either behind the times or hiding weak reply numbers behind an inflated, unreliable figure. Ask for the positive reply rate on their last three campaigns. A straight answer in the 3 to 8% band is a good sign. A dodge is not.

Match the channel to your buyer

If your buyers live in their inbox, email-led wins. If they are active on LinkedIn, a LinkedIn-first shop or a true multichannel agency wins. For most B2B targets, running both as one motion outperforms either alone. We break down the trade-offs in cold email vs LinkedIn outreach for B2B.

Read the contract before the case studies

Case studies are marketing. The contract is reality. Check the minimum term, what counts as a qualified lead, who owns the domains and data, and how you exit. A 3-month commitment is reasonable because outbound needs runway. A 12-month lock-in with vague deliverables is not. If the agency keeps the domains when you leave, you have built their asset, not yours.

Frequently asked questions

What is the difference between a cold email agency and a cold outreach agency?

A cold email agency works one channel. A cold outreach agency is channel-agnostic and runs email and LinkedIn, sometimes phone, as a coordinated motion. For most B2B targets the multichannel version performs better, because a prospect who ignores an email might accept a connection request and reply there. The catch is that running both well needs more engineering, which is why the best multichannel agencies cost more than single-channel shops.

How much should a cold outreach agency cost in 2026?

Serious done-for-you agencies sit between $3,000 and $12,000 a month. Built For B2B runs $3,000 to $8,000. Belkins starts from $4,000, Martal from around $4,500, SalesHive from $4,500. Productised LinkedIn services like Cleverly start far lower at $397, but you get a more templated service. Remember the retainer is often only 60 to 70% of true spend once domains, inboxes, and data are added.

What reply rate should I expect from cold outreach?

A 3 to 8% positive reply rate is the realistic band for a well-run campaign, with the average around 3.4%. Ignore open rates entirely. Apple Mail Privacy Protection inflates them, so they tell you nothing about whether anyone read your message. Judge an agency on positive replies and meetings booked, not vanity metrics.

How long before a cold outreach campaign produces meetings?

Expect 30 to 90 days to meaningful results. New domains need 3 to 4 weeks of warming before they send at volume, so the first month is largely setup. Any agency promising booked meetings in week two is either skipping warming, which risks your domain reputation, or counting low-quality replies as wins. This is why a 3-month minimum is standard and sensible.

Is in-house or outsourced cold outreach better?

It depends on your maths, and you should run the maths rather than guess. A fully loaded in-house SDR in the UK costs £85,000 to £150,000 in year one, with median tenure of 14 to 18 months. An agency gives you a full system for $3,000 to $8,000 a month with no hiring risk. Use our cold email cost calculator to compare the two side by side for your numbers.

The verdict

There is no single best cold outreach agency, only the best one for your stage and channel mix. Belkins owns enterprise appointment setting. Martal goes furthest down the funnel. SalesHive wins on flexible flat-fee contracts. SalesBread is the sharp LinkedIn specialist. CIENCE has scale but variable delivery. Cleverly is the budget entry point. Lemlist partners suit platform loyalists. Every one of them is a real choice for the right buyer, and you should shortlist by your own constraints, not by who shouts loudest.

Built For B2B sits near the top for one specific reason: technical, deliverability-led multichannel outbound run as a single engineered engine, with proof tied to named clients. If that is the problem you are solving, we should talk. Book a strategy call and we will show you exactly how we would build your outbound, the deliverability standards we hold, and the pipeline we would target.