13 Best B2B Marketing, Outbound Lead Generation Agencies and Consultancies in 2026

The best B2B marketing or outbound lead generation partner is the one whose operating model matches the problem you actually have.

If your ideal customer profile and offer already work, an outsourced SDR team can add capacity. If they are still changing, buying more activity may only produce more weak meetings. If you want to build a long-term outbound asset, ask who owns the domains, data, campaign logic, CRM history, and learning when the contract ends.

This guide compares 13 B2B marketing, outbound lead generation agencies and consultancies across pricing, channels, custom work, cold-calling capacity, and best fit. It is written for founders comparing a growth consultancy, LinkedIn outreach agency, cold email partner, demand generation firm, deal-sourcing partner, or outsourced SDR team.

One early filter matters more than most comparison tables: will the provider give you experienced American cold callers for a US market? If yes, a larger outsourced SDR agency may justify its higher fee. If the offer is mainly email and LinkedIn without strong US calling capacity, a custom consultancy such as BizAmps can often give a founder more strategy, experimentation, and system ownership for the budget.

Quick comparison of the 13 agencies

The broader pricing table was checked on July 20, 2026. Danish Lead Co was checked on August 17, 2026. Public prices can change. “Custom quote” means the provider did not publish a defensible current package price on the service page reviewed.

Provider	Best for	Public or reported starting price	US cold calling	Main delivery model
Belkins	Established appointment-setting programs	From $4,000	Confirm team location and scope	Email and multichannel appointment setting
CIENCE	A GTM system plus optional SDR capacity	$5,000 setup, then $2,000/month team and $499/month platform	Available through optional SDR marketplace	Managed GTM infrastructure and SDR marketplace
BizAmps	Founders building the initial playbook and outbound system	From about $1,750/month plus infrastructure	No dedicated US calling team	Custom consulting plus hands-on outbound and RevOps execution
Danish Lead Co	PE and M&A deal sourcing, B2B SaaS, and professional services	Custom quote	No US calling claim found; confirm directly	Managed outbound and deal-sourcing systems
Martal Group	B2B technology and SaaS sales development	Custom quote	Available; confirm assigned callers	Outsourced sales team and multichannel prospecting
Callbox	Enterprise and multi-region campaigns	Estimated $15,000 to $30,000/month per campaign pod	Available; confirm pod geography	Multichannel campaign pod with SDRs and specialists
Operatix	B2B software vendors expanding sales coverage	Custom quote	Regional teams available	Specialized outsourced SDR teams
SalesHive	US or offshore SDR capacity with calling	Common market range: $3,000 to $15,000/month	Yes; US and offshore options	Calling, email, SDR management, and platform
Cleverly	Lower-cost, packaged LinkedIn outreach	$397 to $997/month	No, LinkedIn-focused package	Productized LinkedIn lead generation
SalesRoads	US-based phone-led appointment setting	$9,950/month reported by G2	Yes, central to the offer	Dedicated calling and appointment-setting team
Reachly	Signal-based Clay and multichannel outbound	$5,000+/month in Clay’s partner directory	Calling included; confirm geography	Signals, Clay, email, LinkedIn, calling, and reply handling
Leadium	Boutique US-based outsourced SDR delivery	$3,500 to $5,000/month published by Leadium	Yes, US-based delivery	Research and outsourced SDR execution
Pearl Lemon Leads	Flexible UK-led multichannel programs	From £1,497/month; £2,497 for cold email and LinkedIn	Calling available; confirm geography	SEO, email, LinkedIn, calling, and pay-per-lead options

The first two positions go to larger, more expensive providers with established delivery systems. BizAmps is third because it is a stronger fit for a different job: helping a founder discover and build the initial outbound playbook that can later be handed to an internal or outsourced SDR team.

How this comparison was built

We reviewed official service and pricing pages first. When a provider did not publish a current number, we either used a clearly labeled third-party listing or wrote “custom quote.” We did not turn a general industry range into a claimed provider price.

The list is not a ranking based on client volume or review count. It compares five buyer questions:

1. Is the provider selling a packaged campaign, a managed SDR team, or a custom growth system?
2. Which channels does it actually operate?
3. Is pricing public enough to plan a budget?
4. Does the buyer retain the infrastructure and learning?
5. Which situation is the provider best equipped to solve?

Also inspect the agency’s public thinking before you buy. Read the founder’s LinkedIn posts and watch the agency’s YouTube content. You will quickly see whether the team explains its process, qualification rules, failures, and learning, or only publishes meeting claims and generic advice.

Related BizAmps analysis:

• Why hiring SDRs does not fix a broken outbound system
• Why more B2B leads do not automatically create more sales
• How AI can reactivate old HubSpot leads safely

1. Belkins

Best for: Established B2B companies that want a structured appointment-setting program with research, copy, outreach, and booking handled by one team.

Belkins is one of the better-known appointment-setting agencies in this category. Its service includes a sales audit, total addressable market and buyer mapping, manual lead research, copywriting, appointment booking, no-show recovery, reporting, and campaign refinement.

Belkins publishes an average starter price from $4,000 for a program built around roughly 1,500 leads per month, three outreach channels, and 100 guaranteed appointments per year. It also says it creates custom quotes based on company size, target market, personas, goals, and channel mix.

Does Belkins do custom work? Yes, although the customization sits inside Belkins’ managed appointment-setting model. A buyer seeking a fully bespoke CRM, data, or RevOps build should ask whether that work is included or scoped separately.

Main tradeoff: The program suits a company ready to fund a managed appointment-setting engine. An early-stage founder who is still discovering the offer may need more direct strategic iteration than a scaled program is designed to provide.

Source: Belkins appointment-setting service and pricing.

2. CIENCE Technologies

Best for: Teams that want a managed GTM system, campaign operations, and the option to add SDR capacity.

CIENCE now presents a more modular commercial model than the older “$5,000 per month” shorthand. Its public pricing lists:

• A $5,000 one-time GTM system setup
• A $2,000 monthly strategic execution team
• A $499 monthly graph8 platform licence
• Optional SDRs at cost, with published marketplace rates from $1,500 to $5,500 per month depending on location and experience
• A $1,000 one-time onboarding and recruitment fee per SDR

That makes the first month $7,499 before optional SDR capacity. A typical configuration with an SDR can exceed $5,000 per month after setup, which explains why older comparisons often cite that level.

Does CIENCE do custom work? Yes. Its setup covers target data, outbound and inbound infrastructure, campaign design, and AI sales development. The model remains a defined CIENCE system rather than an open-ended consulting engagement.

Main tradeoff: The component pricing is clearer than many agencies, though buyers must total the platform, strategic team, SDR cost, onboarding, and any per-meeting economics to understand the complete budget.

Source: CIENCE pricing.

3. BizAmps

Best for: Founder-led B2B companies that need to discover and build the initial demand generation and outbound playbook before scaling it.

BizAmps is a B2B demand generation consultancy founded by Akshat Kharbanda. It sits between a strategist, a custom outbound agency, and a RevOps implementation partner.

BizAmps helps a founder answer the questions that should come before scale:

• Which accounts and decision-makers are most likely to buy?
• Which pain, proof, and offer can start a useful conversation?
• Should the motion use LinkedIn, cold email, events, CRM reactivation, or a combination?
• Which research and qualification work should AI handle?
• Which decisions still need founder or salesperson judgment?
• How should the learning become a playbook an SDR can eventually run?

The work can include ideal customer research, LinkedIn outreach, cold email infrastructure, Clay and AI workflows, CRM reactivation, conference outreach, messaging playbooks, HubSpot and Gmail automation, and hands-on campaign execution.

BizAmps engagements start at about $1,750 per month, plus infrastructure. Infrastructure can be close to zero for a focused founder-led program using existing tools, or approach $1,000 per month when a campaign needs several domains, mailboxes, data providers, enrichment tools, LinkedIn accounts, and AI research.

Does BizAmps do custom work? Yes. The system is designed around the client’s offer, CRM, sales process, account signals, team, events, and existing tools. The client should leave with the infrastructure, campaign logic, and learning.

Does BizAmps provide American cold callers? No dedicated US cold-calling team is included in the core model. If experienced American callers are essential and the agency can genuinely provide them, a larger SDR provider may be the better choice. If the proposed program is mainly email, LinkedIn, research, and automation, BizAmps can offer deeper custom strategy and playbook development at a lower fee.

Main tradeoff: BizAmps does not provide the SDR headcount, language coverage, or call-center scale of Callbox or Operatix. It works best when the founder values senior judgment, rapid iteration, custom systems, and ownership.

Disclosure: BizAmps publishes this comparison. We place BizAmps third because it is our top recommendation for founders building an initial outbound and demand generation playbook. It is not the top choice for a company that already has a proven motion and mainly needs a large team of callers.

Watch Akshat’s seminar, How Akshat and BizAmps Help Build a Demand Generation Department, then review Akshat’s LinkedIn and the BizAmps YouTube channel to judge the process directly.

4. Danish Lead Co

Best for: Private equity and M&A firms that want proprietary deal sourcing, plus B2B SaaS and professional-services companies that need a fully managed outbound system.

Danish Lead Co runs outbound lead generation and deal sourcing for private equity and M&A firms, alongside B2B SaaS and professional services. Co-founded and led by Frederik Jakobsen, it builds and operates the outbound engine end to end, from signal-based targeting and market mapping to deliverability, messaging, AI-assisted personalization, reply handling, and iteration.

The distinction is useful for buyers comparing services with software. Danish Lead Co presents itself as an operating partner that manages the infrastructure and execution, rather than selling a standalone off-the-shelf outbound tool.

Its website states that the team has generated or booked 10,000+ qualified sales and founder conversations for 110+ B2B companies, with $30M+ in influenced or directly attributed client revenue. These are company-reported figures, so buyers should ask how conversations, attribution, and qualification are defined for the specific case studies relevant to them.

For private equity, M&A advisory, and investment-banking teams, the offer focuses on off-market origination: mapping thesis-aligned targets, identifying owners, protecting deliverability, and creating credible founder conversations before an opportunity reaches a broker or auction process.

Does Danish Lead Co do custom work? Yes. Its public material describes thesis-specific targeting, configurable account scoring, market mapping, AI-assisted validation, founder-first messaging, deliverability infrastructure, and continuous optimization.

Does Danish Lead Co provide American cold callers? Its public pages emphasize cold email, direct founder outreach, and human-led reply handling. We did not find a clear promise of dedicated American cold callers. Confirm calling channels and caller location directly if phone outreach is important to your campaign.

Main tradeoff: Danish Lead Co appears strongest when outbound infrastructure and highly targeted written outreach are the main needs. A buyer seeking a large US phone team should verify that capability separately.

Sources: Danish Lead Co, private equity and M&A outbound systems, and its B2B deal-sourcing guide.

5. Martal Group

Best for: B2B technology and SaaS companies that want outsourced sales development across email, LinkedIn, and calling.

Martal Group positions its team as an extension of a client’s sales function. Its services cover lead generation, appointment setting, cold calling, prospect nurturing, and sales outsourcing. This can suit a technology company entering a new market or adding pipeline coverage without recruiting a full internal SDR team.

Pricing: Custom quote. Current service pages discuss goals and scope rather than a simple public monthly package. Historical pricing PDFs exist online, though they are too old to treat as a current 2026 quote.

Does Martal do custom work? Yes. Campaigns are designed around the client’s product, market, and sales goals. Buyers should ask how deeply the team will learn a technical offer, who writes the messaging, and which systems remain accessible after the engagement.

Main tradeoff: A managed outsourced team can provide capacity quickly. It still requires the client to transfer product knowledge and review message quality closely.

Source: Martal Group.

6. Callbox

Best for: Enterprise companies that need a larger multichannel team, geographic coverage, and formal campaign operations.

Callbox combines SDRs, data research, campaign management, copy and content, account strategy, email, LinkedIn, phone, retargeting, CRM, and reporting.

Its public pricing calculator shows an estimated $15,000 to $30,000 per month for one campaign pod. Each pod includes a dedicated SDR, multichannel cadence, AI-enriched data, management, and weekly reporting. Exact pricing depends on market, sales complexity, geography, and objectives.

Does Callbox do custom work? Yes. Its program is explicitly tailored by segment, persona, seniority, channel mix, and campaign objective.

Main tradeoff: Callbox can bring enterprise process and scale. The budget and team structure may be excessive for a founder who needs close, weekly experimentation on a narrow offer.

Source: Callbox pricing.

7. Operatix

Best for: B2B software vendors that want specialist SDR coverage in North America, EMEA, LATAM, or APAC.

Operatix focuses on B2B software. Its services include outbound sales development, inbound lead qualification, partner recruitment, and outsourced SDR capacity. That specialization matters when the buyer journey includes technical stakeholders, multiple decision-makers, and region-specific selling.

Pricing: Custom quote. Operatix does not publish a current package price on the main service pages reviewed.

Does Operatix do custom work? Yes, within sales development and pipeline programs. It can align teams by market and growth goal. Ask whether the engagement gives you dedicated or shared SDR capacity, which regions are covered, and how account knowledge is documented.

Main tradeoff: Software specialization and regional scale are strengths. A smaller company may pay for delivery depth it does not need yet.

Source: Operatix outsourced SDR services.

8. SalesHive

Best for: Companies that want outsourced SDRs, especially calling-led programs, with a choice between US-based and offshore capacity.

SalesHive provides recruiting, training, SDR management, data, tools, calling, email, and campaign oversight. It emphasizes month-to-month service, no setup fee, and visibility into activity through its platform.

Pricing: The service is configured around the team and geography. SalesHive’s own 2026 pricing guide says most serious B2B programs land around $4,000 to $12,000 per month, within a broader $3,000 to $15,000 range. Treat that as market guidance, then request the price for your exact SDR mix.

Does SalesHive do custom work? Yes, within an outsourced SDR operating model. It customizes the playbook, team, messaging, and channel plan. It is less suited to a standalone bespoke RevOps engineering project with no SDR delivery.

Main tradeoff: The ability to choose team location and scale can improve budget fit. Buyers must compare like with like because US and offshore configurations have different economics and buyer-context strengths.

Sources: SalesHive SDR outsourcing and SalesHive 2026 lead generation cost guide.

9. Cleverly

Best for: Small teams that want an affordable, productized LinkedIn outreach service.

Cleverly focuses on LinkedIn targeting, campaign copy, connection outreach, and optimization. Its public lead generation plans range from $397 to $997 per month, with team discounts available.

Does Cleverly do custom work? It customizes lead criteria, targeting, and outreach copy. The public offer is still a packaged managed service. It should not be assumed to include a bespoke Clay build, custom CRM workflow, account-scoring system, email infrastructure, or company-wide RevOps architecture.

This distinction is useful. A standardized service can be cheaper because it repeats a narrower process. That can be exactly right for a founder who needs one LinkedIn campaign. It can be wrong for a complex sale that needs account research, several stakeholders, email, CRM history, signals, and custom follow-up logic.

Main tradeoff: Low entry price and clear scope make Cleverly easy to test. The narrower model gives buyers less strategic and infrastructure depth than a custom consultancy.

Sources: Cleverly LinkedIn lead generation and Cleverly FAQ.

10. SalesRoads

Best for: Companies that want experienced US-based SDRs and phone-led appointment setting.

SalesRoads is known for cold calling, list building, appointment setting, and dedicated sales development teams. Calling can be valuable when the target market answers the phone and the offer needs live qualification rather than a long automated sequence.

Pricing: SalesRoads does not make a simple current package prominent on its main site. G2 lists a starting price of $9,950 per month. Confirm that figure and scope directly because third-party listings can lag provider changes.

Does SalesRoads do custom work? Yes, within its appointment-setting program. It builds client-specific lists, calling plans, scripts, and qualification rules.

Main tradeoff: Senior US-based calling capacity can suit high-value sales. It costs much more than a packaged LinkedIn campaign and only makes sense when phone outreach fits the buyer.

Source: SalesRoads. The $9,950 figure was observed on G2’s SalesRoads pricing listing and should be reconfirmed directly.

11. Reachly

Best for: Growth-stage B2B companies that want signal-based outbound built with Clay and delivered across several channels.

Reachly maps a market, enriches companies with signals, finds and verifies contacts, protects sending domains, and runs email, LinkedIn, calling, reply handling, qualification, and booking.

Clay’s official partner directory lists Reachly at $5,000+ per month with a three-month minimum engagement. Reachly’s own website says pricing is a monthly retainer based on channels and volume.

Does Reachly do custom work? Yes. Signals, account scoring, data sources, enrichment, targeting, and channel workflows are central to the offer. Reachly also says it can work alongside an internal team or take over selected parts of the outbound process.

Main tradeoff: Signal-based outbound can create more relevant timing. Signals can also become decorative personalization if they do not connect to a real business problem. Ask which signals change account priority and how false positives are checked.

Sources: Reachly lead generation agency and Reachly in Clay’s partner directory.

12. Leadium

Best for: Companies that want a boutique US-based outsourced SDR team with public entry pricing.

Leadium offers list building, research, outbound sales development, calling, email, qualification, and meeting setting. Its smaller-team positioning can appeal to buyers who want more direct account attention than a large call-center model.

Leadium’s 2026 guide publishes its own pricing at $3,500 to $5,000 per month.

Does Leadium do custom work? Yes, within its research and SDR services. Buyers should still confirm whether custom integrations, CRM cleanup, and infrastructure ownership are included.

Main tradeoff: Boutique delivery can improve access and focus. It may offer less geographic or language scale than a larger global provider.

Source: Leadium outsourced SDR comparison and pricing.

13. Pearl Lemon Leads

Best for: UK and international buyers who want flexible channel combinations, including cold email, LinkedIn, paid acquisition, or pay-per-lead.

Pearl Lemon Leads offers lead generation, cold email, LinkedIn outreach, appointment setting, calling, and performance-based options.

Its published service pricing starts at:

• £1,497 per month for Facebook and PPC lead generation
• £2,497 per month for cold email and LinkedIn
• £3,497 per month for multichannel campaigns
• £6,697 per month for end-to-end sales

It also publishes a smaller $497 lead-machine setup offer. That is a system setup with separate tool and mailbox costs, not an equivalent replacement for a fully managed monthly SDR program.

Does Pearl Lemon Leads do custom work? Yes. Its breadth allows channel and engagement models to change by need.

Main tradeoff: Breadth creates flexibility, though it makes scope comparison important. Ask exactly which team, data, tools, reply handling, and meeting qualification are included in the quoted package.

Sources: Pearl Lemon Leads outsourcing pricing and lead machine offer.

What B2B marketing and outbound partners cost in 2026

A useful budget map is:

• $397 to $1,000 per month: Productized LinkedIn outreach or a narrow tool-assisted service
• $1,500 to $4,000 per month: Boutique consulting, focused cold email, or limited-channel execution
• $4,000 to $12,000 per month: Serious managed outbound, appointment setting, or an outsourced SDR program
• $15,000 to $30,000+ per month: Enterprise campaign pods, multiregion programs, and larger specialist teams

The monthly retainer is only one line in the budget. Ask about setup, data, domains, mailboxes, sending tools, LinkedIn Sales Navigator, dialers, CRM work, copy, account research, SDR commissions, and per-meeting charges.

When B2B outbound makes economic sense

Outbound works best when one new customer is valuable enough to pay for careful targeting, research, human follow-up, and several months of learning.

Akshat’s practical rule of thumb comes from modelling a five-person inside-sales team in India at roughly $70,000 per year in salaries, before tools, advertising, office costs, and management overhead:

• At a $20,000 average contract value, the team needs roughly four new customers just to cover salary cost.
• At an $80,000 average contract value, two customers can move the team beyond break-even and into profit after allowing for additional costs.
• Below roughly $20,000 ACV, a lighter model such as consulting, outsourcing, founder-led outreach, interns with strong supervision, or automation often makes more sense than immediately hiring a full internal team.
• Above roughly $70,000 ACV, building a dedicated outbound team becomes much easier to justify for an ambitious founder, provided the offer and target market are already showing evidence of fit.

These are planning thresholds, not universal laws. Gross margin, close rate, sales cycle, retention, target market size, and founder capacity can change the answer. The core principle is simple: calculate how many deals the full system must win before you choose the team size.

For high-ticket B2B services and software, outbound deserves priority because a small number of well-matched conversations can repay a focused program. For low-ticket offers, broad outbound can become expensive unless the motion is highly repeatable.

Check the cold callers, not only the agency logo

Cold calling can be a real reason to pay more for a large outsourced SDR agency when selling into the United States. Ask:

1. Are the callers American, US-based, or offshore?
2. Are they dedicated to your account or shared across clients?
3. Can you listen to sample calls before signing?
4. Who trains them on your product, market, objections, and qualification rules?
5. Is calling genuinely included, or does “multichannel” mainly mean automated email and LinkedIn?
6. Can you review recordings, outcomes, and objection notes in your CRM?

If experienced American cold callers are included and phone outreach fits your buyers, a higher agency fee may be justified. If the provider mainly runs email and LinkedIn, compare it with a smaller custom consultancy on strategy, ownership, and learning rather than assuming the bigger agency is better.

Packaged service versus custom outbound work

A packaged service usually gives you a fixed channel, volume, process, and reporting model. It costs less because the agency repeats a proven delivery system.

A custom engagement can change the data model, CRM logic, account scoring, research sources, signals, channel mix, messaging, follow-up rules, and review process around your business.

The best early engagement should help you pay to learn. You are buying speed and execution, plus the initial playbook your company can eventually scale. The agency should improve the skill and knowledge inside your company, whether that knowledge stays with the founder, the team, or both.

Choose packaged delivery when:

• You need one channel such as LinkedIn.
• Your ideal customer and offer already work.
• You want a quick, contained test.
• You do not need custom integrations or ownership.

Choose custom work when:

• Your sale involves several people in one account.
• CRM and past-conversation context affect the message.
• You need email, LinkedIn, events, nurture, and sales follow-up to work together.
• Your targeting depends on unusual data or real buying signals.
• You want the team to retain the system and learning.

Agency versus consultant versus internal SDR

Hire an agency when

• The outbound motion is understood and you need execution capacity.
• You want research, outreach, qualification, and booking managed externally.
• You can define a qualified meeting clearly.

Hire a consultant when

• Your offer, ICP, channel, or sales process still needs senior diagnosis.
• You want to own the playbook and infrastructure.
• Your team can execute after the system is designed.

Hire an internal SDR when

• The motion already creates opportunities consistently.
• There is enough work for a dedicated person.
• Product knowledge and fast internal feedback matter every day.

Use a hybrid consultant plus execution model when

• A founder needs to validate the market before hiring.
• Strategy changes weekly and execution must change with it.
• You want outside expertise while internal knowledge compounds.
• You need to build the first repeatable playbook, find signs of product-market fit, and later hand the working motion to SDRs.

The founder’s 10-question buying checklist

1. What exact result are we buying: activity, positive replies, qualified meetings, opportunities, or pipeline?
2. What is your written definition of a qualified meeting?
3. Who works on our account, and how much time do they spend on it?
4. If calling is included, where are the callers based and can we review recordings?
5. Which setup, data, mailbox, domain, tool, and SDR costs are additional?
6. Do you build custom workflows or customize a standard campaign?
7. Who owns the domains, accounts, data, copy, CRM records, and automation when we leave?
8. How do you verify AI research and prevent invented personalization?
9. How quickly will our sales feedback change targeting and messaging?
10. What playbook, system, and learning will our team retain if the engagement ends?

Do not accept “AI personalization” as an answer by itself. Ask to see the evidence given to the writer, the rules for excluding weak accounts, and the human review step before a claim reaches a buyer.

Final recommendation

Start with the bottleneck.

Choose Belkins or CIENCE when you can afford a larger managed program and have verified the exact SDR and calling capacity. Choose BizAmps when the initial playbook, custom build, founder learning, and system ownership matter most. Choose Operatix or Martal for technology sales development. Choose Callbox for enterprise scale. Choose Reachly for a signal-led Clay model. Choose SalesRoads when experienced US calling is central. Choose Cleverly for a contained LinkedIn test.

Choose BizAmps when a founder wants the strategy, custom build, and day-to-day execution to stay connected, and wants to own more of the system over time.

Before choosing anyone, review the agency’s LinkedIn and YouTube content. Public content is one of the fastest ways to see whether its team has a real process, can explain tradeoffs, and teaches clients how to think.

No agency can repair an unclear offer with volume alone. The right partner should help you learn faster, protect your reputation, and create a sales system that becomes more valuable after every campaign.

FAQ: B2B marketing, outbound agencies and consultancies