The best lead generation agencies in 2026, compared fairly

The best lead generation agencies in 2026 include Belkins, CIENCE, Callbox, Martal Group, SalesHive, SalesRoads, memoryBlue, Leadium, Sopro and SalesBread. They differ most in channel (phone, email or LinkedIn), in how they price, and in the buyers they serve. Pick the one that matches your market and how you want to sell.

Every agency here was checked on its own website on 24 Oct 2026. We list what each says it does and how it prices. Where it does not publish a price, we say so. GTM Plays is software, not an agency, so it is not ranked here; see the end of this guide for when software is the better buy.

How we picked these agencies

We looked at the agencies named most often in current "best lead generation agency" search results and kept the ones that:

• run outbound B2B lead generation or appointment setting as their core service
• explain their channels and service model on their own site
• publish pricing or explain how they quote it

We did not use directory star ratings, because they are hard to verify and change often. The order reflects how broad each agency's offer is, not a measured performance score.

Quick comparison

Agency	Main channels	Pricing as of Oct 2026	Best for
Belkins	Email, calls, SMS/WhatsApp, LinkedIn, ads	Retainer, quoted	Full omnichannel programmes
CIENCE	Email, calls, LinkedIn	Campaign team $2,000/mo + platform $499/mo + SDRs from $1,750/mo	Transparent SDR pricing
Callbox	Phone, email, LinkedIn, digital	Custom	Multi-region campaigns
Martal Group	Email, LinkedIn, calls	On request	Tech and SaaS
SalesHive	Email, calls	Flat monthly fee, quoted	US-based SDRs
SalesRoads	Phone, email	Quote	US phone-led appointments
memoryBlue	Phone-led	Quote	B2B tech and professional services
Leadium	Email, calls, LinkedIn, gifting, events	Quote	Multi-channel plus data
Sopro	Email-led, multi-channel	From around $3.8K/mo	No minimum contract
SalesBread	LinkedIn, email	Quote	LinkedIn-first outreach

The 10 best lead generation agencies

Belkins (agency)

What it is: a B2B lead generation and appointment-setting agency. Its site lists omnichannel outreach across cold email, cold and intent calling, voicemail, SMS and WhatsApp, LinkedIn and paid advertising, plus lead research, ABM, deliverability consulting and outsourced SDRs (belkins.io).

Pricing (as of Oct 2026, belkins.io/pricing): monthly retainer packages built around your goals, markets and channels. No figures are published, so you get a quote on a call.

Best for: mid-market and larger B2B teams who want a full outbound programme run for them.

Watch out for: retainers are a monthly commitment, so agree in writing what counts as a qualified appointment before you start.

CIENCE (agency)

What it is: outsourced SDR teams for outbound, inbound and scaled programmes, with cold email, cold calling, appointment setting, research and ads services, run on its own graph8 platform (cience.com).

Pricing (as of Oct 2026, cience.com/pricing): published. A campaign team costs $2,000 a month and the graph8 platform $499 a month (75,000 credits included). SDRs start at $1,750 per SDR a month offshore, or $3,500 per SDR a month in the US and Europe. A performance bonus is paid when an SDR hits their held-meeting target, and setup is a one-time fee. CIENCE's own example, with five offshore SDRs, comes to $11,249 a month plus bonus.

Best for: teams who want transparent SDR pricing and the option to add or remove reps month to month.

Watch out for: the bonus formula adds cost when targets are hit, so model the total cost per held meeting before you sign.

Callbox (agency)

What it is: an outsourced B2B lead generation and appointment-setting provider founded in 2004. It runs multi-channel outreach across phone, email, LinkedIn and digital channels, and says it serves clients in 60+ countries (callboxinc.com).

Pricing (as of Oct 2026, callboxinc.com): custom. Callbox says price depends on campaign scope, target market and engagement model.

Best for: companies selling into several regions, including APAC, that want phone-led campaigns.

Watch out for: without a published price, ask for the full cost per campaign and the exact definition of a qualified lead.

Martal Group (agency)

What it is: a B2B lead generation and sales outsourcing agency that lists 200+ onshore sales executives and 15 years in business. Services include appointment setting, cold email, LinkedIn lead generation, cold calling and inbound lead qualification (martal.ca).

Pricing (as of Oct 2026, martal.ca): on request through a "Request Pricing" form; no figures are published.

Best for: tech and SaaS companies that want experienced reps, with the option of help further down the funnel.

Watch out for: confirm which services are included in the base fee and which cost extra (its site lists trade-show appointment setting as an extra-cost item).

SalesHive (agency)

What it is: a B2B sales development agency with US-based SDRs, a strategist and an AI platform, counting client meetings and accounts since 2016 (saleshive.com).

Pricing (as of Oct 2026, saleshive.com): one flat monthly fee covering your SDR team, strategist, AI platform, data and tools. The figure is quoted after a call.

Best for: mid-market teams who want US-based SDRs on a single monthly fee.

Watch out for: ask how many SDR hours your fee buys and how meetings are counted.

SalesRoads (agency)

What it is: an outsourced appointment-setting and SDR company based in Boca Raton, Florida. It says its dedicated reps have 5 to 10 years of industry experience (salesroads.com).

Pricing (as of Oct 2026, salesroads.com): quote-based. Its quote form asks whether your expected monthly investment is under $5,000, $5,000 to $10,000 or $10,000 or more.

Best for: US companies that want phone-led appointment setting with experienced reps.

Watch out for: phone-first programmes suit some markets better than others, so ask for case studies in your segment.

memoryBlue (agency)

What it is: an outsourced SDR, ADR and AE provider running since 2003, working only with B2B technology and professional services companies. It lists 650+ dedicated reps and 7 global offices, and now includes Operatix (memoryblue.com).

Pricing (as of Oct 2026, memoryblue.com): not published on its home page; quoted through a strategy call.

Best for: B2B tech and professional services firms that want phone-led sales development, and possibly to hire the reps later.

Watch out for: it is focused on tech and professional services, so other sectors may not fit.

Leadium (agency)

What it is: a B2B lead generation agency offering appointment setting, data sourcing and inbound lead qualification across outbound email, cold calling, LinkedIn prospecting, gifting and events (leadium.com).

Pricing (as of Oct 2026, leadium.com): quoted after a consultation. Its contact form asks for a budget range rather than publishing a price.

Best for: growing B2B companies that want multi-channel appointment setting with a data-sourcing option.

Watch out for: compare the quote against a written definition of what counts as a qualified appointment.

Sopro (agency)

What it is: a B2B prospecting service that runs expert-led outreach on its own platform and data, with cold email, multi-channel and account-based engagement (sopro.io).

Pricing (as of Oct 2026, sopro.io/pricing): Sopro says pricing starts at around $3.8K a month, tailored to your business, with no minimum contract.

Best for: small and mid-sized B2B companies that want email-led prospecting without a long contract.

Watch out for: email-led programmes depend on deliverability and data, so ask how both are managed.

SalesBread (agency)

What it is: a done-for-you LinkedIn and email lead generation agency. It promises 20+ sales-qualified leads a month using personalised LinkedIn and email outreach "or your money back", on a month-to-month service (salesbread.com).

Pricing (as of Oct 2026, salesbread.com): not published on its home page; discussed on a free consultation call.

Best for: B2B companies that want LinkedIn-first outreach run for them on monthly terms.

Watch out for: read the guarantee terms so you know exactly what counts as a sales-qualified lead.

How agencies charge

Agencies use four main pricing models. Knowing which one you are buying makes quotes easier to compare.

• Monthly retainer: a fixed fee for a team and a programme. Predictable, but you pay whether or not meetings happen.
• Per-SDR fee: you pay for each rep's time, sometimes with a bonus when they hit target, as CIENCE publishes.
• Pay per meeting or per lead: you pay for outcomes. Definitions matter, so read what counts. Our guide to pay-per-meeting lead generation covers the trade-offs.
• Hybrid: a lower retainer plus a fee per result.

Questions to ask before you sign

1. How do you define a qualified lead or held meeting, and can we put it in the contract?
2. Which channels will you use, and whose domains, inboxes and LinkedIn profiles?
3. Who owns the data, lists and infrastructure if we stop?
4. What is the minimum term and notice period?
5. Can you show case studies from our industry and deal size?
6. How will you report results, and how often?

When software is the better buy

An agency makes sense when you have budget but no one to run outreach. If you have a founder or a rep with a few hours a week, software is usually cheaper and you keep control of the process and data. Our comparison of lead generation services vs software explains the trade-off, and our list of the best lead generation companies covers both.

GTM Plays is one software option for LinkedIn. Its AI agent finds people showing intent signals, scores fit against your ICP, and writes and sends messages from your own LinkedIn account. Replies arrive in one inbox, where you take over. It does not book meetings by itself. Pro is $149 a month with a 7-day free trial, and it connects to HubSpot, Salesforce, Pipedrive, Zoho CRM, Attio, folk, Breakcold, Instantly, Smartlead, SmartReach, HeyReach, Slack, Clay and Zapier, plus webhooks, a REST API and an MCP server.

If you are weighing an outsourced team against tools, our guides to outsourced lead generation and appointment setting services go deeper. To try GTM Plays, start a 7-day free trial.