business resources
7 Best B2B Lead Generation Agencies for 2026
21 Oct 2026
Filling a B2B pipeline takes more than a big contact list. The agencies below run outbound for other companies, from list building and cold email to calling, LinkedIn and booked meetings.
Each entry covers what the agency does, how it describes its approach, what it publishes about pricing, and where it may not fit. Every detail comes from the agency's own website.
What Makes a Great B2B Lead Generation Agency
The strongest agencies are clear about who they target, how they protect deliverability, and what counts as a result. Five things separate them:
• Tight targeting built on a defined ideal customer profile, not a bought list.
• Sending infrastructure and deliverability handled by the agency, not left to the client.
• More than one channel, so prospects who ignore email can still be reached.
• Reporting tied to meetings and pipeline rather than emails sent.
• Contract terms that let a client test before committing for a year.
#1: CIENCE
CIENCE is a Miami-based outbound agency, founded in 2016, that builds and runs managed SDR teams for its clients.
Its services cover outbound, inbound and local SDR teams, cold email, cold calling, appointment setting, B2B data and demand generation. The company describes its model as "AI plus Human Expertise" and says it runs five AI agents in support of each SDR. It reports more than 2,500 clients across 250 industries.
Pricing
CIENCE publishes itemised pricing. A go-to-market setup costs $5,000 one time, and SDRs are priced at $1,500 to $6,500 per month each, depending on level and location, plus onboarding.
Who It Is Best For
Companies that want a full outbound team without hiring one, from startups to enterprise.
Things to Consider
Because pricing is itemised, the first month adds up quickly once setup, platform and SDR seats are combined.
#2: OutreachBloom
OutreachBloom is a B2B agency that combines Reddit marketing, AI SEO and done-for-you outbound. It is based in Olympia, Washington, and built for B2B SaaS and services companies with 10 to 200 employees.
Buyers now ask ChatGPT, Gemini and Google AI Overviews which vendors to trust, and those answers often draw on Reddit threads and high-authority sources. OutreachBloom works to place client brands in those conversations and citations, then tracks how often the brand appears in AI answers.
The outbound side runs fully managed cold email and LinkedIn outreach to the same buyers. The team builds the lead lists, manages sending infrastructure and deliverability, writes the messaging for client approval, runs A/B tests and handles replies.
Pricing
OutreachBloom publishes starting prices. Cold email outreach starts at $2,400 per month, and AI visibility work starts at $3,400 per month.
Who It Is Best For
B2B SaaS teams that want AI search visibility and outbound pipeline from one partner.
Things to Consider
OutreachBloom is not a fit for B2C or local consumer brands, and scope beyond the starting prices is custom.
#3: Belkins
Belkins is an appointment-setting agency founded in 2017, with offices in Dover, Delaware, Denver, Colorado, Poland and Ukraine.
It offers appointment setting, cold email, cold calling, LinkedIn lead generation, account-based marketing, deliverability consulting and HubSpot consultancy. Belkins says each project gets a dedicated team, setup takes 14 days, and first results arrive within a month.
Pricing
Not published. Plans are sold by appointment volume, from 30 or more meetings a year up to enterprise programmes.
Who It Is Best For
Startups, small businesses and enterprises that want a set number of booked meetings.
Things to Consider
With no published prices, buyers need a sales call before they can compare cost.
#4: Martal Group
Martal Group is an outsourced sales and lead generation firm with offices in Oakville, Ontario, San Francisco, Uniondale, New York, and Clermont-Ferrand, France. It says it has been in business for 15 years.
Its services include appointment setting, outbound lead generation, cold email, LinkedIn, cold calling, sales outsourcing and inbound lead qualification. Martal cites more than 200 onshore sales executives across North America, Europe and Latin America, supported by its own AI outreach system.
Pricing
Not published as figures. Martal charges a flat monthly fee, with higher tiers adding sales commission. Engagements start with a three to four month pilot, then run monthly.
Who It Is Best For
Companies from startups to Fortune 500 firms that want experienced sales reps working their market.
Things to Consider
The pilot period and commission tiers mean the full cost depends on results and term length.
#5: Leadium
Leadium is a Las Vegas-based appointment-setting agency that runs outbound and inbound programmes with a US-based SDR team.
Its channels are email, calling, LinkedIn and gifting, backed by lead research and deliverability support. Leadium says its contact data is human-sourced and validated, and it keeps a boutique client portfolio.
Pricing
Fixed rates are not published. The pricing page sorts buyers by monthly budget, starting at $2,500 to $3,500, on month-to-month terms.
Who It Is Best For
Startups through enterprise teams that want US-based SDRs without a long contract.
Things to Consider
A boutique portfolio can mean limited capacity for new clients at busy times.
#6: SalesHive
SalesHive has run outsourced sales development since 2016, with a strong emphasis on cold calling.
It offers cold calling with US-based or offshore SDRs, email outreach, list building, appointment setting and sales strategy. SalesHive runs its own platform, including a power dialer, an email personalisation tool and AI agents, and reports more than 129,000 meetings booked.
Pricing
Not published. Plans are custom quoted as one flat monthly fee, with no setup fees and month-to-month terms.
Who It Is Best For
Teams that want phone-led outreach alongside email, on flexible terms.
Things to Consider
Buyers comparing cost will need a quote, since no figures are shown.
#7: Callbox
Callbox is a B2B lead generation company founded in 2004 and headquartered in Encino, California.
It runs multichannel outreach across phone, email, LinkedIn and chat, plus account-based marketing, event and webinar marketing, outsourced SDR teams and multilingual campaigns across more than 60 countries. Callbox describes its approach as "Human + AI".
Pricing
Callbox calls its pricing custom. Its online estimator shows about $16,000 to $32,000 per month for one campaign pod, which includes a dedicated SDR and a campaign manager.
Who It Is Best For
Enterprise and mid-market B2B companies running campaigns in several regions or languages.
Things to Consider
The entry cost is high for smaller teams testing outbound for the first time.
What to Look for When Hiring a B2B Lead Generation Agency
• Ask who builds the list and how contacts are verified.
• Ask who owns the sending domains and how deliverability is monitored.
• Ask what counts as a qualified meeting, and how it is reported.
• Ask about minimum terms and whether a pilot is available.
• Ask which channels are included and which cost extra.
Conclusion
The right agency depends on the channel mix, budget and buyer. CIENCE and Callbox suit teams that want large managed programmes. Belkins, Martal Group, Leadium and SalesHive offer custom-quoted outbound with different channel strengths.
For B2B SaaS and services companies that also want to show up when buyers ask AI tools for recommendations, OutreachBloom combines outbound with AI search visibility in one engagement.
Key Takeaways
• CIENCE suits teams that want managed SDR capacity and itemised, published pricing.
• OutreachBloom pairs done-for-you cold email and LinkedIn outreach with AI search visibility for B2B SaaS and services firms.
• Belkins, Martal Group and Leadium run multichannel appointment setting on custom quotes.
• SalesHive and Callbox put phone outreach alongside email and LinkedIn.
• Few agencies publish fixed prices. CIENCE, OutreachBloom and Callbox show figures on their sites.
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Ricardo Tomaz
Ricardo Tomaz is VP of Finance & Operations at Ztudium, the 4IR technology company behind Businessabc, Citiesabc, and IntelligentHQ. He owns the group's finance and operations function, spanning financial strategy, budgeting, reporting, and multi-entity operations, and works directly with leadership to align commercial goals with data-driven insight.
Working at the core of a technology group operating across AI and blockchain, Ricardo writes on the practical intersection of finance and emerging technology: how automation and digital transformation are reshaping business operations, what data-driven decision-making looks like in practice, and the questions of governance and ethics that come with AI-led systems.
