Best Outbound Agencies for US Expansion (2026)

A European software company that has already won its home market rarely stalls in the US because the product is wrong. It stalls because the outbound motion that worked in Utrecht or Copenhagen assumes a buyer who does not exist in Austin or Boston: different budget cycles, different objections, a nine-hour gap between a Tuesday afternoon in Amsterdam and a Tuesday morning in Denver. The outbound agencies for US expansion on this list all build for that gap specifically, rather than treating the US as one more territory on a global list.

We publish this list. Danish Lead Co, the outbound company behind this blog, is ranked first, and only because its own clients are international B2B companies opening outbound conversations with US buyers. Every other company below is a real, named agency, verified against its own live site this month, ranked on fit for the specific job of getting a foreign company's outbound working in the US, not on overall size.

Why does US expansion need a different outbound agency than a domestic hire?

US expansion needs a different outbound agency than a domestic hire because a domestic SDR, however good, is usually still running the home market's playbook on foreign soil: the case studies they lean on are local, the send times are set to the wrong clock, and nobody on the team has field-tested what a US chief financial officer expects to see by email three before a call gets booked. An outbound agency built for this specific job starts with US-based (or US-hours) infrastructure, US buyer research, and a sequence written for a buyer who has never heard of the company, rather than adapting a European deck. That difference shows up first in reply quality: a European company sending its home-market messaging to US inboxes typically gets read as generic, because the proof points, the pricing frame, and even the spelling (organised versus organized) signal "not from here" before the first sentence lands.

Quick comparison: outbound agencies for US expansion

How did we choose these outbound agencies for US expansion?

• A real, checkable US presence. Either a US office, a US-hours team, or a named track record of running US campaigns, not a claim of "global reach" with no specifics.
• Live verification. Every fact below was checked against the provider's own site this month, not copied from another agency's roundup.
• No conflicts of interest. None of the five named companies below are current Danish Lead Co clients or partners.

Which outbound agencies belong on a US expansion shortlist?

1. Danish Lead Co

Best for: an international B2B company that wants a done-for-you outbound system purpose-built for reaching US decision-makers, rather than a general-purpose agency that happens to also serve the US.

Danish Lead Co runs ICP research, list building, US-hours deliverability infrastructure, cold email sequencing, and an AI inbox manager that answers a US buyer's reply in under five minutes regardless of the time difference back home, with a LinkedIn touchpoint layered on top. The company is based in Aarhus, Denmark and carries a 5.0 average across 32 public reviews on Clutch, Trustpilot, and Google. Engagements start from $3,000 a month once infrastructure is live. Across the accounts Danish Lead Co runs, roughly 1 in 6 people who send a positive reply go on to book a meeting, which is the benchmark a US expansion pilot should be measured against, not against how many emails went out.

2. Martal Group

Best for: a foreign tech company that wants formal, government-backed help entering North America alongside its outbound programme, not just a vendor relationship.

Martal Group has run B2B outbound for more than a decade from Oakville, Ontario, and now operates US offices in San Francisco and Uniondale, New York, plus a base in Clermont-Ferrand, France. Its site for foreign partnerships lists five government-sponsored expansion partnerships, including the Trade Council in Denmark and the Estonian Chamber of Commerce and Industry, aimed specifically at companies moving into North America. Services span outbound and inbound lead generation, cold email and cold calling, LinkedIn outreach, and an AI sales platform layered on top of onshore reps. Pricing is not published; the site directs prospects to a quote request.

3. Operatix

Best for: a European B2B software company that wants an outbound partner with an already-large US-facing team, rather than a single dedicated rep learning the market from scratch.

Operatix is headquartered in London and runs a 300-plus person SDR team across North America, EMEA, LATAM, and APAC, with US offices in California and Texas. It works with roughly 800 B2B software vendors, concentrated in cybersecurity, cloud, fintech, martech, and DevOps, and covers outreach in 22 languages, which matters for a company whose home-market content is not in English to begin with. Operatix also runs inbound qualification and channel acceleration alongside outbound, so it fits a company that wants one partner across multiple pipeline sources. Pricing is not published.

4. Callbox

Best for: a company that wants an agency with a long, checkable history of running cross-border campaigns specifically, not just a company that happens to be based abroad.

Founded in 2004, Callbox states it has run more than 10,000 campaigns across the US and Canadian markets and serves over 15,000 companies globally, with offices in the US, UK, Australia, Singapore, Malaysia, Hong Kong, and Colombia. Its cross-border service explicitly targets companies expanding into US and Canadian buyers, with multilingual campaign support. Pricing is subscription-based and customised to campaign scope; the site does not publish a starting figure.

5. SalesRoads

Best for: a company that specifically wants a US-based team already inside the market, rather than a team dialling and emailing into the US from a different time zone.

SalesRoads is headquartered in Boca Raton, Florida, and runs outsourced SDR teams for appointment setting and lead generation across manufacturing, government contracting, SaaS, and healthcare, citing clients including Quest Diagnostics and Microsoft. It advertises no long-term contract, which suits a company that wants to test US expansion before committing further. Pricing is quote-based; prospects select an expected monthly investment band rather than seeing a published rate.

6. Belkins

Best for: a company that wants an established, high-volume omnichannel agency with a long public track record, even though it is not built specifically around cross-border expansion.

Belkins, founded in 2017 and based in Dover, Delaware, runs cold email, calling, LinkedIn, SMS, and paid outreach as one coordinated motion, and states it has helped clients generate more than $2 billion in revenue since founding, across 50-plus industries. It holds a 4.9 Clutch score from 230-plus reviews. Belkins is a strong general-purpose choice; a company should weigh whether it needs the cross-border specialisation the first four names on this list are built around, or whether Belkins' broader experience fits better for a business entering the US as one of several new markets at once.

How should a company choose between these outbound agencies for US expansion?

1. Confirm the team is actually US-hours, not just US-branded. Ask which time zone the reps and the reply-management team work in, since a nine-hour gap between when a US buyer replies and when someone answers is the single most common way a promising conversation goes cold.
2. Ask for a US-specific writing sample, not a generic template. A sequence written for a US chief financial officer should read differently from one written for a Nordic operations director; if the agency cannot show the difference, it has not actually localised anything.
3. Check what a pilot measures. A good 30 to 60 day pilot for US expansion should report qualified conversations and positive-reply-to-meeting conversion, not raw send volume, since volume is the easiest number to inflate and the least useful one to buy on.
4. Ask how domains and mailboxes are set up for US deliverability. A domain with no US sending history is more likely to land in spam on US corporate mail gateways in the first weeks; ask what warm-up period the agency runs before full volume.
5. Confirm compliance coverage for US rules, not just GDPR. CAN-SPAM and, for any calling component, TCPA obligations differ from what a European team is used to managing; an agency that cannot describe its compliance approach in one sentence has not thought about it.

For companies weighing this decision from adjacent markets, the same trade-offs show up in outbound for Nordic SaaS companies entering the US and in how UK professional services firms handle US market entry, and a company still deciding whether it needs a US presence at all before it spends on outbound should read how to validate US demand without a local sales hire first.

Ready to build the US side of your outbound system?

If a shortlist from this list is the next step, a call with Danish Lead Co is a working session, not a pitch: bring the US segment of your ICP and we will map where the outbound system needs to differ from what runs at home, what a realistic first 60 days looks like, and what it would cost to run properly. Book a call and leave with a plan you can compare against every other name on this page.

Related reading

• Healthcare Outreach Using Location Expansion Data
• Turning Customer Expansion Signals Into Pipeline for B2B
• AI B2B Outbound Agencies: Pricing Models Compared