7 Best Cold Email Agencies for B2B Startups

Cold email remains one of the fastest ways for a young B2B company to reach buyers who have never heard of it. Doing it well takes clean data, sharp copy and sending domains that stay out of spam.

Most startups do not have the people to run all of that in house. The seven agencies below sell cold email as a managed service, and every detail comes from their own websites. Prices appear only where an agency publishes them.

Quick Comparison

1. OutreachBloom

Summary: A done-for-you agency that runs cold email from list building to booked meetings for B2B SaaS and services companies.

OutreachBloom is based in Olympia, Washington, and works with B2B companies of roughly 10 to 200 people. The agency builds lists, writes copy, sets up sending domains and manages deliverability.

It also handles replies and books meetings onto the client's calendar. LinkedIn outreach and Reddit marketing can run alongside email when a startup wants more than one channel.

Key features:

• Prospect lists and copywriting done by the agency
• Sending domains and deliverability managed for the client
• Reply handling and meeting booking included
• LinkedIn outreach and Reddit marketing available alongside email

Who it suits: B2B SaaS and services startups that want outbound handled without hiring a sales development team.

Caveat: The agency works with B2B companies only. New domains need a few weeks of warmup, so meetings do not arrive in the first days.

2. SalesAR

Summary: A B2B lead generation agency that books meetings through email and LinkedIn, with a one-month Pilot package.

SalesAR lists offices in London, Dover in Delaware, and Kyiv. Its services include appointment setting, prospect research, account-based marketing and deliverability support.

The one-month Pilot gives a startup a short test before the three-month Growth plan.

Key features:

• Cold email and LinkedIn outreach
• LinkedIn engagement before direct messages
• Deliverability and anti-spam support
• One-month Pilot and three-month Growth packages

Who it suits: Early-stage teams that want to test outbound for a month before committing.

Caveat: Cold calling is not among its listed channels.

3. Leadium

Summary: An outsourced SDR provider that prospects through email, phone, LinkedIn and gifting on month-to-month terms.

Leadium was founded in 2015 and is based in Las Vegas, Nevada. Its site says it has worked with sales teams in 45 industries, including SaaS and cybersecurity.

Key features:

• Outbound email, calling and LinkedIn prospecting
• Sales gifting and event outreach
• Data sourcing and inbound lead qualification
• Month-to-month contracts

Who it suits: Startups that want SDR capacity without a long commitment.

Caveat: Leadium states that it guarantees deliverables, not appointment outcomes.

4. SalesHive

Summary: A provider of US-based SDRs for calling, with managed cold email on its higher plans.

SalesHive says its core SDR team is fully US-based. Email programs cover messaging and sending infrastructure, with no setup fees and month-to-month terms.

Key features:

• US-based SDRs using the SalesHive Power Dialer
• Personalized cold email with managed infrastructure
• List building and appointment setting
• No setup fees

Who it suits: Startups selling into US accounts that want callers and email together.

Caveat: The entry Starter plan does not include email, so cold email starts on the Growth plan.

5. Growth Rhino

Summary: A go-to-market agency focused on cold email for companies with high-value B2B contracts.

Growth Rhino says it has worked with more than 100 companies across North America, the EU and the Middle East. It sets up personas, messaging and domain warmup, then runs small tests before scaling what works.

Key features:

• Persona and messaging research
• Domain and IP warmup during setup
• Test campaigns before scaling
• Real-time reporting

Who it suits: Startups with large deal sizes and long sales cycles.

Caveat: Contact data is billed separately from the service fee.

6. Martal Group

Summary: An outbound agency that supplies sales reps and runs email, LinkedIn and phone outreach.

Martal offers fractional, full-time and enterprise sales teams, with staff across North America, the EU and Latin America. Its listed industries include SaaS, cybersecurity and fintech.

Key features:

• Outreach across email, LinkedIn and phone
• Fractional and full-time rep options
• An AI sales platform that adjusts sequences

Who it suits: Tech startups that want outsourced reps as well as campaigns.

Caveat: The package is broad, so a startup wanting email alone may pay for more scope than it needs.

7. CIENCE

Summary: An outbound provider that combines SDR teams with its own B2B contact data.

CIENCE reports more than 2,500 clients over ten-plus years. Its SDRs work phone, email and LinkedIn, and cold email is sent from protected domains.

Key features:

• Dedicated outbound SDRs
• Cold email from protected domains
• Verified contact and account data

Who it suits: Teams that want data and outreach from a single provider.

Caveat: Pricing pairs a monthly fee with a per-meeting commission, so monthly cost varies with results.

How to Choose a Cold Email Agency

Start small. A pilot or month-to-month contract limits the cost of a poor fit.

Ask who owns the domains. Sending domains and inboxes decide deliverability, and a startup should keep them if the engagement ends.

Define success up front. Meetings booked, meetings held and pipeline created are different targets.

FAQ

How quickly does cold email produce meetings?

New sending domains need a few weeks of warmup, and early weeks are spent testing messaging. Meetings usually follow once volume ramps.

Do cold email agencies publish prices?

None of the seven agencies here publishes a fixed price list. Each quotes after a call.

Is cold email a good fit for startups?

It suits startups that sell to defined roles inside other companies and have a clear offer for them.