Cold email is still one of the cheapest ways for a B2B company to start sales conversations with buyers who have never heard of it. Doing it well, though, is a daily job: lists need researching, sending domains need warming up, copy needs testing and replies need answering fast.
That workload is why many B2B teams hand cold email to a specialist agency. We compared seven agencies on what they run, how they protect deliverability, what they publish about price and how long they lock clients in.
How We Compared These Agencies
Every profile below is based on the agency’s own website. We looked at five things:
- Scope: whether the agency handles research, copy, sending and replies, or only part of the process.
- Channels: email only, or email combined with LinkedIn, phone, ads or gifting.
- Deliverability: whether campaigns send from separate, warmed-up domains.
- Pricing: whether a price is published, and how it is structured.
- Contract terms: month-to-month, annual or not stated.
Where an agency does not publish a figure, the article says so rather than estimating one.
Which Agency Fits Which Need
| If the priority is | Look at |
| Cold email fully handled for a B2B SaaS or services team | OutreachBloom |
| Booked meetings with email as the core channel | Belkins |
| Email, LinkedIn and phone run by one team | Martal Group |
| A US-based team combining calls and email | SalesHive |
| A flat, published monthly price | Leadium |
| Paying partly on results | CIENCE |
| Email backed by LinkedIn and display ads | Sopro |
The Seven Agencies at a Glance
| Agency | Pricing | Contract |
| 1. OutreachBloom | On request | Not published |
| 2. Belkins | From $5,000, custom proposal | Not published |
| 3. Martal Group | Not published | Not published |
| 4. SalesHive | Custom quote, no setup fee | Month-to-month or annual |
| 5. Leadium | $3,500 to $5,000 a month | Month-to-month |
| 6. CIENCE | Monthly fee plus per-meeting commission | Month-to-month |
| 7. Sopro | Bespoke | No minimum contract |
Prices and terms come from each agency’s own site and may change.
What Each Agency Offers
1. OutreachBloom
Best for: B2B SaaS and services teams that want cold email run end to end, from research to booked meetings.
| Snapshot | Details |
| Based in | Olympia, Washington, US |
| Pricing | On request |
| Strongest point | Handles the full process, including every reply |
| Watch out for | Built for B2B buyers, so consumer brands are not its core fit |
OutreachBloom is a B2B agency that runs the whole cold email operation for its clients. It builds the prospect list, sets up dedicated sending infrastructure, writes personalized copy and manages every reply until a qualified conversation is ready.
Its clients are mainly B2B SaaS and services companies with roughly 10 to 200 people. Teams that want more than one channel can add LinkedIn outreach, organic Reddit marketing or AI SEO alongside cold email.
Best Fit
OutreachBloom suits a B2B team that knows who it sells to but has no time or in-house setup to prospect. Consumer brands and local businesses will usually find a better fit elsewhere.
2. Belkins
Best for: Companies that measure outbound in booked meetings, with email as the main channel.
| Snapshot | Details |
| Based in | Dover, Delaware, US, with offices in Colorado, Illinois and London; founded 2017 |
| Pricing | From $5,000, with a custom proposal |
| Strongest point | A dedicated account manager and SDR on every package |
| Watch out for | LinkedIn outreach and calling are add-ons, not included by default |
Belkins is a B2B lead generation and appointment-setting agency with cold email at the center of its programs. Each package includes manual lead research, copywriting, deliverability maintenance and reply handling.
New sending domains are set up and warmed in small batches, reaching full volume in about two weeks. Belkins says replies are reviewed and answered within 24 hours.
Best Fit
Belkins fits a company that wants a meeting-focused email program with a named team behind it. Buyers who need phone or LinkedIn from day one should budget for the add-ons.
3. Martal Group
Best for: Teams that want email, LinkedIn and phone coordinated by one outbound team.
| Snapshot | Details |
| Based in | Oakville, Ontario, Canada, with offices in San Francisco, New York and France |
| Pricing | Not published; three service tiers described without prices |
| Strongest point | More than 200 onshore sales executives across three regions |
| Watch out for | Contract terms are not stated on its site |
Martal Group has run outbound programs for more than 15 years and says it has worked with more than 2,000 B2B brands. Its teams sit in North America, Europe and Latin America.
Campaigns usually launch within about two weeks. Outreach goes out from separate subdomains or new domains, with rotating mailboxes and warm-up before sending starts.
Best Fit
Martal Group suits a company selling into several markets that wants one partner across channels. Pricing and terms both need checking on the first call.
4. SalesHive
Best for: US companies that want cold calling and cold email from one SDR team.
| Snapshot | Details |
| Based in | Remote-first, with a US-based core SDR team; founded 2016 |
| Pricing | Custom quote by location, channels and volume; no setup fees |
| Strongest point | More than 106,000 qualified meetings booked |
| Watch out for | The entry plan is phone only; email starts on a higher plan |
SalesHive provides dedicated SDR teams that work on a platform the company built in-house. It reports more than 1,500 client accounts launched.
Plans range from one SDR on phone only to two SDRs on phone and email. Most clients launch in about three weeks after kickoff.
Best Fit
SalesHive fits a US company that sees phone as part of its outbound mix. Email-only buyers may end up paying for more than they need.
5. Leadium
Best for: Buyers who want a known monthly cost and no long-term commitment.
| Snapshot | Details |
| Based in | Las Vegas, Nevada, US |
| Pricing | $3,500 to $5,000 a month, flat |
| Strongest point | Month-to-month contracts with a fully US-based team |
| Watch out for | Its pages give mixed answers on whether a setup fee applies |
Leadium is a fully managed outbound agency with more than ten years in business. Its SDRs run personalized cold email, cold calling, LinkedIn prospecting and gifting.
Each engagement starts with a strategy session and a custom prospecting plan. Leadium integrates with the client’s CRM and names HubSpot as an example.
Best Fit
Leadium suits a team that wants to test outsourced outbound on a fixed budget. A US-only team is best matched to US markets.
6. CIENCE
Best for: Companies that want one SDR across every channel and part of the fee tied to results.
| Snapshot | Details |
| Based in | Miami, Florida, US; founded 2016; assets acquired by graph8 |
| Pricing | Fixed monthly fee plus a commission per held meeting |
| Strongest point | More than 2,500 B2B clients and 115 published case studies |
| Watch out for | The per-meeting commission makes monthly cost harder to predict |
CIENCE assigns a single SDR to handle phone, email and LinkedIn outreach for each account. Buyers deal with one contact rather than a team split by channel.
Contracts run month to month. The recent change of ownership is worth asking about before a long engagement.
Best Fit
CIENCE fits a company that wants to share some of the risk with its agency. Teams that need a fixed, predictable budget may prefer a flat fee.
7. Sopro
Best for: Teams that want email backed by LinkedIn, display ads and gifting.
| Snapshot | Details |
| Based in | UK; founded 2015 by Rob Harlow and Ryan Welmans |
| Pricing | Bespoke |
| Strongest point | No minimum contract and a client reporting portal |
| Watch out for | The wider channel mix may be more than a first campaign needs |
Sopro runs managed prospecting across email, LinkedIn, display ads and gifting. Each engagement includes audience building and a dedicated account manager.
Campaigns go live about three weeks after the first consultation, and results are tracked in a reporting portal.
Best Fit
Sopro suits a company that wants several touchpoints around each email. A small team testing cold email for the first time may only need part of the mix.
Questions to Ask Before Hiring
- Does the agency send from separate domains, and who monitors them each day?
- How is the prospect list built, and can the client review it before sending?
- Who answers replies, how quickly, and how are meetings handed over?
- What is the minimum contract, and what is the notice period?
- What does the weekly report show, and is there a live dashboard?
Final Thoughts
The right cold email agency depends on the channels a team needs, how it wants to pay and how much of the process it wants to hand over.
For B2B SaaS and services companies that want cold email run end to end, OutreachBloom leads this list. Teams that need large SDR benches, phone-heavy programs or results-based pricing will find good options further down.
Frequently Asked Questions
1. How much does a cold email agency cost?
Most agencies quote per engagement after a discovery call. Among those that publish a figure, Leadium lists $3,500 to $5,000 a month and Belkins starts from $5,000.
2. How long before cold email produces meetings?
Sending usually reaches full volume two to three weeks after kickoff. When meetings follow depends on the offer, the market and the quality of the list.
3. Will cold email hurt a company’s main domain?
It should not when campaigns send from separate, warmed-up domains. Belkins and Martal Group both describe using new domains or subdomains for this reason.
4. Should a company run cold email in-house instead?
It can, with separate sending domains, a verified list and someone answering replies daily. Many teams start in-house and outsource once the time cost becomes clear.
5. Is cold email better than LinkedIn outreach?
Neither is better in every case. Many agencies on this list combine the two, because some buyers answer email and others only reply on LinkedIn.
