10 Best Cold Email Agencies for B2B in 2026: Pricing and Proof

A cold email agency plans, writes and sends outbound email campaigns for you, then hands interested replies to your sales team. The good ones also own the boring parts that decide whether any of it works: the target list, the sending domains, inbox warmup, deliverability monitoring and reply handling. This guide ranks the 10 cold email agencies B2B buyers ask AI assistants and Google about most in 2026, with what each one does, public pricing where it exists and the proof each agency publishes.

I run frontBrick, so we put ourselves first, and I say that up front. Everything else in this list comes from each agency's own website as checked on 2 November 2026. Where an agency publishes a number, I attribute it to them. Where they do not publish pricing, I say so instead of guessing.

Key takeaways

The 10 best cold email agencies at a glance

How we picked and ranked these agencies

The shortlist started with the agencies that ChatGPT, Claude, Perplexity and Google's AI answers name most often for buyer questions such as "best cold email agency for B2B SaaS startups" and "how much does a cold email agency cost per month". frontBrick tracks those answers daily across 30 prompts and 6 engines, so the list reflects who buyers are actually being shown, not who paid for a placement.

Every firm on the list had to actually sell cold email or email led outbound as a service. Firms that have moved into software, or that sell LinkedIn outreach as their main product, are listed separately at the end. We then ranked each agency on five things a buyer can check without a sales call:

If you want the method behind our own campaigns, our cold email deliverability guide and our guide on how to build a lead list walk through both parts in detail.

1. frontBrick

frontBrick is a cold email agency for B2B SaaS companies, marketing agencies and B2B service firms. We build every list in Clay, enrich it through a waterfall of data providers and score accounts on signals such as hiring, funding and technology changes, so each message has a reason behind it. Complimentary LinkedIn outreach runs next to the email campaign, and data, sending infrastructure and outreach tools are all included in the fee.

Pricing is public. Managed cold email starts at $3,000 per month for 10,000 approved prospects, paid as two monthly payments for one 60 day cycle, so a starting campaign costs $6,000 in total. Longer partnerships start at $4,500 per month, and ABM programs start at $7,000 per month. All prices are on our pricing page.

Proof: for Hire with Jarvis, a focused campaign reached 4,636 prospects and created 35 qualified opportunities over 2.5 months. With a 3% reply rate and 25.4% of replies positive, the campaign built $700K in pipeline (pipeline, not closed revenue). Another program sent 180.9K emails at a 1.92% reply rate. Jamie Dowis, Head of Growth at Curio Digital, summed up his campaign as 30+ leads and two new customers. More examples are on our case studies page.

Best for: teams that want an agency to build a real targeting system, not just send volume, and that want to see every assumption in the price before they sign.

2. Belkins

Belkins is one of the largest B2B lead generation agencies and the name AI assistants mention most often for cold email in our tracking. Its cold email service covers research, copy, sending and reply handling. Belkins says its experts send a limited number of emails per day to build sender reputation and that it achieves a 99% deliverability rate, and that its SDRs review and answer every reply within 24 hours.

Pricing: Belkins publishes an average starter price for cold email from $5,000, with a page that sizes the program by company size and lead volume. Proof: Belkins publishes a case study library. Best for: established B2B companies that want a large, full service team and are comfortable with a higher starting budget.

3. SalesHive

SalesHive positions its cold email service for B2B sales leaders who want relevant replies and qualified meetings. Each client gets a dedicated strategist, AI personalized email, managed sending domains and reply support. SalesHive advertises month to month terms with no setup fees and says clients owe nothing until they approve the launch.

Proof: SalesHive reports 183 meetings booked by email for one commercial insurance client, part of 596 meetings for that client since November 2022, and 64 email meetings for a workplace injury management client within a wider program of 1,440 meetings. Best for: buyers who want a low commitment start and a single named strategist.

4. Cleverly

Cleverly runs a large done for you cold email program for B2B companies. Its cold email page promises 10 to 30 qualified B2B meetings every month and says the team handles strategy, list building, copy and execution.

Proof: Cleverly reports $312M in client pipeline and $51.2M in client revenue generated, and says it has worked with more than 10,000 clients, with over 100 cold email case studies published. Pricing is not listed on the cold email page. Best for: companies that want a proven, packaged program and do not need deep custom targeting.

5. OneAway

OneAway runs cold email and LinkedIn outbound for B2B SaaS companies using AI agents it built in house, and books qualified meetings straight onto the client's calendar. Every plan includes strategy, lead lists, copywriting, sending infrastructure, a HubSpot integration and a reply agent that answers interested leads in under 2 minutes.

Pricing is public: the Intro plan is $3,250 per month with no setup fee, covering up to 10,000 leads and 20,000 emails per month on cold email. Proof: OneAway publishes named case studies, including one quote about growing from zero to over 100 qualified opportunities. Best for: SaaS teams that are comfortable with an AI led delivery model and want a fast launch.

6. CIENCE

CIENCE is an appointment setting company whose SDR teams book qualified meetings by phone, email and LinkedIn. It is less of a pure cold email shop than the others here, but email is a core channel in most of its programs. CIENCE says it has served 2,500+ B2B clients over 10+ years.

Pricing model: a fixed monthly fee plus a commission for each held meeting, month to month with no long contract. CIENCE says a typical SDR books 5 to 20+ qualified meetings a month depending on industry and target. Proof: its Mandolin case study reports 110 qualified meetings in 6 months against a target of 8 a month. Best for: teams that want people on the phone as well as in the inbox.

7. Martal Group

Martal Group is a B2B lead generation agency that offers cold email as a dedicated service alongside its wider outbound work. Its cold email page says many clients start seeing replies and booked meetings within the first 4 weeks, and client testimonials on the page mention open rates above 25% and weekly reporting.

Pricing is on request. Proof: Martal publishes named case studies, including Awin, Clickworker and Berger Levrault. Best for: B2B companies that want an established outbound agency with named client references and weekly reporting.

8. Understory

Understory describes itself as an allbound B2B growth agency for growth stage and enterprise SaaS. Outbound email is one channel in a system that also uses signals, Clay enrichment, paid media and content, so the same target account sees a coordinated message.

Proof: Understory says it has served 150+ companies and generated $100M+ in revenue for clients. One client quote on its homepage describes about 365 positive replies and close to 75 meetings from outbound. Pricing is custom. Best for: SaaS teams that already run paid media and want outbound to work from the same account list.

9. Leadium

Leadium is a B2B lead generation and appointment setting agency. It emphasizes 100% human sourced and validated contact data, which matters if your market is poorly covered by the big databases. Email outreach is part of its outbound service.

Proof: Leadium says 500+ sales leaders, marketers and founders trust it and publishes a case study library. Best for: teams with hard to reach audiences who care about data quality first.

10. OutreachBloom

OutreachBloom offers done for you cold email for B2B SaaS and service companies, alongside Reddit marketing and AI search optimization. That mix is unusual: the same team can work on getting your brand into AI answers while it runs outbound to your target accounts.

OutreachBloom publishes pricing and case studies on its site. Its homepage makes the in house comparison directly, noting that a single SDR costs $80k+ per year before tools and management. Best for: SaaS companies that want outbound plus visibility work from one small team.

Adjacent specialists (not ranked)

Disclosure: these firms show up in AI answers for cold email questions but are not cold email agencies first, so we did not rank them. SalesBread sells itself as a LinkedIn lead generation agency that aims for one B2B lead per day through personalized LinkedIn outreach. ColdIQ was known as an outbound agency, but its homepage now sells a GTM data API for AI agents, with plans from free to $499 per month. Both can be useful, just for a different job.

What does a cold email agency cost?

Published prices for managed cold email cluster between $3,000 and $5,000 per month for a starting program. The bigger difference is what the fee includes. Some agencies bundle data, domains, inboxes and tools. Others bill them on top, which can add hundreds of dollars a month.

When you compare quotes, ask each agency for the full cost of data, sending domains, inboxes, tools, setup and campaign management, and for its definition of a qualified meeting. A cheaper retainer that excludes data can cost more than an all in fee. Our guide to outsourced lead generation covers the main pricing models and their trade offs.

How to choose a cold email agency

Most failed cold email programs fail on targeting or deliverability, not copy. Use these questions on every sales call:

Deliverability rules are now enforced by the inbox providers themselves. Google's email sender guidelines and Yahoo's sender best practices require authentication, easy unsubscribes and low spam complaint rates. Any agency you hire should be able to explain how it stays inside those limits.

Compliance matters too. In the US, the CAN-SPAM Act sets the rules for commercial email, including a working opt out and a real postal address. Bulk senders to Gmail and Yahoo also need one click unsubscribe as defined in RFC 8058, which your agency should set up in its sending tool. If you sell into the UK or EU, check the stricter rules for business email before your agency launches.

Cold email agency vs in house SDR

An agency makes sense when you need pipeline in the next quarter and do not have someone who can build lists, set up infrastructure and write copy. Hiring makes sense when outbound is already working and you need a person to run it every day. Many teams do both: an agency builds and proves the system, then an in house rep takes it over with the data, sequences and playbooks the agency handed back.

What results to expect in the first 90 days

The first 2 weeks usually go to targeting, list building, copy approval and domain warmup. Replies start once sending ramps up, typically in weeks 3 to 4. By day 60 you should know which segments and angles work, and by day 90 you should be able to see qualified opportunities in your CRM. Ask for those milestones in writing before you sign.

Reply rates vary by market. Our own published campaigns range from 1.92% across a large program to 3% for a focused one, which is why we judge programs on positive replies and qualified opportunities rather than opens. If you want to see how we would run this for you, start with our cold email lead generation service.

FAQ

What is the best cold email agency in 2026?

It depends on your market and budget. frontBrick is the best fit for B2B SaaS and agencies that want Clay based targeting with data and tools included from $3,000 per month. Belkins suits larger budgets, and SalesHive and CIENCE suit buyers who want month to month terms.

How much does a cold email agency cost per month?

Published starting prices range from about $3,000 to $5,000 per month. frontBrick starts at $3,000, OneAway at $3,250 and Belkins lists an average starter price from $5,000. Always check whether data, domains and tools are included.

Do cold email agencies still work in 2026?

Yes, when they target well and protect deliverability. Programs that send low volumes from properly authenticated secondary domains to a tight, signal based list still book meetings. High volume, generic campaigns struggle under the Google and Yahoo sender rules.

How long does it take a cold email agency to get results?

Plan on 2 weeks of setup and warmup, first replies in weeks 3 to 4, and a clear read on what works by day 60. Martal Group says many of its clients see replies within the first 4 weeks.

Is cold email legal?

In the US, commercial email is allowed if it follows CAN-SPAM, which requires accurate headers, a real postal address and a working opt out. The UK and EU have stricter rules, so check them before you target those markets.

Should I hire a cold email agency or an SDR?

Hire an agency if you need pipeline quickly and have no outbound system yet. Hire an SDR once the system works and you need someone to run it daily. Many teams use an agency first and hand the system to an in house rep later.

What should a cold email agency include?

At minimum: ICP and list building, verified emails, separate sending domains and inboxes, warmup, copy, sending, reply handling and weekly reporting. The best agencies also include enrichment, signals and a written definition of a qualified meeting.