The best outbound agencies for B2B SaaS, compared

Most “best agency” lists are written by agencies who rank themselves first. This one is too — we’re on it. So read it with that in mind, and judge it on whether the fit notes are useful rather than on where anyone placed.

We’ve tried to be specific about who each firm suits, including the situations where we’re the wrong call. If you only take one thing away, take the criteria section. The criteria matter more than the ranking.

The six things that actually decide fit

Agencies differ far more than their homepages suggest. These are the variables that change the outcome:

1. Channel mix. Phone-led, email-led, LinkedIn-led, or all three. This is the biggest single difference and it’s rarely stated plainly. A phone-led shop and an email-led shop are different businesses.
2. Where the reps sit. US-based reps cost more and sound different on a cold call to a US buyer. Offshore reps make the economics work at volume. Neither is wrong; they suit different motions.
3. Volume versus precision. Some firms optimise for meetings booked, others for meetings held with the right person. Ask which number they report on.
4. Who manages the reps. A rep without an experienced manager fails, in-house or outsourced. Ask who coaches them and how often calls get reviewed.
5. Pricing model. Retainer, per-meeting, per-rep, or hybrid. Per-meeting sounds safest and quietly incentivises low-quality meetings.
6. Stage fit. An agency built for enterprise rollouts will not do good work for a company at $800K ARR, and the reverse is equally true.

The agencies

Belkins

Founded in 2015, US-headquartered, and one of the largest firms in the category. Publicly describes an omnichannel motion led by email and LinkedIn, serving 50+ industries. 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: anyone whose motion depends on the phone, or who wants a small dedicated pod rather than a large machine.

Martal Group

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

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

SalesRoads

Founded 2007 and 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.

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.

Salesbread

A boutique operating deliberately at low volume — heavily personalised LinkedIn and email touches, with lead quotas rather than activity targets.

Best for: small total addressable markets where every account matters and generic sequences would burn the list.
Less good for: broad markets where coverage matters more than craft.

StudioGTM

That’s us. A dedicated pod — list building, SDRs, cold calling and full-funnel outreach — 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.

Best for: founders whose own selling worked but doesn’t transfer to anyone else, and who want the motion documented rather than just outsourced.
Less good for: companies before product-market fit, companies above roughly $5M ARR with a mature SDR org already running, and anyone who wants pure volume at the lowest possible cost per meeting. Several firms above will beat us on that last one.

When you shouldn’t hire any of us

An agency amplifies a motion. It doesn’t invent one. If any of the following is true, spend the money elsewhere for now:

• You don’t know who your best customer is. Outbound against a guessed ICP burns your list and teaches you nothing you couldn’t have learned cheaper.
• Nobody has closed a deal from a cold conversation yet. If the founder has never done it once, there’s no motion to scale.
• You can’t take the meetings. Booked meetings are worthless if there’s nobody to run them well.
• You need results inside 30 days. Lists and messaging take weeks, and the first month of any engagement is mostly learning.

How to run the evaluation

Ask every firm on your shortlist the same five questions, and compare the answers rather than the decks:

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?

That last one is the tell. Anyone who has run outbound for real has a story about something that didn’t work. A firm that can’t produce one either hasn’t done enough of it, or isn’t being straight with you.