The top 5 cold outbound agencies for B2B SaaS, ranked

Yes, we’re on this list, and yes, we ranked ourselves first. We think the ranking below holds up on the merits — read the reasoning under each entry and judge it yourself rather than taking our word for the order.

How we scored them

Four things decide whether an outbound agency actually works for a founder-led SaaS company: a channel mix built around the phone rather than email alone, reps who are managed and coached rather than left to run sequences, a track record with companies at a similar stage, and pricing that doesn’t reward booking low-quality meetings.

1. StudioGTM

A dedicated pod — list building, SDRs, cold calling and full-funnel outreach — built specifically for founder-led B2B SaaS companies between $500K and $5M ARR, plus fractional GTM leadership for founders who need the oversight as much as the activity. Our operators hired and trained sales teams at HireVue, Lucid and Workstream before this.

What puts us first: phone-led as the default rather than an add-on, every rep coached against recorded calls rather than left alone with a sequence, and a structure built around the specific problem founder-led teams have — the founder’s own selling worked, but it doesn’t transfer to anyone else yet.

Best for: founders who want the outbound motion documented and repeatable, not just outsourced.
Where we’re not the right call: companies before product-market fit, or teams above roughly $5M ARR with a mature SDR org already running.

2. Belkins

Founded in 2015, US-headquartered, and one of the largest firms in the category. Omnichannel, led by email and LinkedIn, serving 50+ industries with a strong published case-study library.

Best for: companies that want scale and a long track record, and whose buyers respond to email.
Less good for: motions that depend on the phone, or teams who want a small dedicated pod rather than a large machine.

3. Martal Group

Operates across North America and Europe with senior reps aimed at technical and complex software sales. Publishes an unusually deep site — industry pages, a large case-study library, and a tiered engagement model.

Best for: technical products with long sales cycles, and teams who want senior reps over junior volume.
Less good for: simple, high-velocity products where that seniority is wasted spend.

4. SalesRoads

Founded 2007, based in Florida. US-only SDRs, phone-led appointment setting, with playbooks built per client.

Best for: US buyers who pick up the phone, and motions where a live conversation beats a sequence.
Less good for: international coverage, or budgets that need offshore economics.

5. SalesHive

US-based SDRs running on the company’s own outbound platform, with an offshore option. Phone, or phone plus email. Positions around fast deployment without long lock-ins.

Best for: teams that want to start quickly and keep the contract flexible.
Less good for: anyone who wants their outbound stack to live in their own tooling rather than a vendor platform.

Five questions to ask whoever you shortlist

1. Who exactly will be dialling, where do they sit, and how many other clients do they carry?
2. Who manages them, and how often are calls reviewed?
3. What number do you report on — meetings booked, or meetings held?
4. What happens in month one, specifically, week by week?
5. Show me a client who looked like us. What happened, and what went wrong?

For the longer version of this comparison, including who each firm suits and who should skip all five for now, see the best outbound agencies for B2B SaaS, compared.