14 B2B Lead Generation Agencies to Compare

Abstrakt reports more than 100,000 appointments a year. It also reports 2,000 active clients across the US and Canada, supported by 500+ US-based specialists across its services. Its appointment-setting work combines calls, email and LinkedIn, with callers based at its St. Louis headquarters. Packages include exclusive territories, a dedicated team and monthly performance reviews.

The firm says a meeting counts only if it meets criteria agreed before the program starts. For a sale involving several decision-makers, request a sample handoff from your sector.

Belkins' homepage shows 145 appointments booked in nine months for an online education company. Belkins advertises 100–400+ qualified appointments a year and notes that results depend on multiple factors. Its homepage timeline separates launch in the first 14 days from first appointments within the next 30 days.

Monthly retainers include manual research, copywriting, scheduling and no-show recovery. Enterprise options add custom integrations, team structures, SLAs and contract terms, plus support for SOC 2, ISO and data privacy requirements. The small-business package is delivered through partner agencies in the Belkins ecosystem.

Callbox's homepage lists 15,000+ companies served across 60+ countries. It names teams in the US, UK, Australia, Singapore, Malaysia, Hong Kong and Colombia, with outreach through calls, email, social media and webinars. A campaign pod includes one dedicated SDR, contact data, campaign oversight and weekly reporting; ask how many pods your markets require.

Its site also describes AI voice systems handling high-volume transactional calls alongside human SDRs handling consultative conversations. Establish which approach would apply to your prospects, plus the languages and time zones covered by the assigned team.

CIENCE names Okta and Microsoft among the 2,500+ B2B teams it says it has worked with. Its managed outbound and inbound SDR work uses graph8, with software researching and drafting while people review and engage prospects. The homepage describes month-to-month work.

The homepage lists “Managed SDR and campaigns” at “From $5,600 per month”. The pricing page separately lists a $5,000 one-time setup fee, a $2,000 monthly strategic team and a $499 monthly platform license. The pricing page totals setup, team and platform at $7,499 for the first month, with SDR capacity quoted separately. It also lists SDR rates by level and region without stating the period they cover, a $1,000 one-time onboarding fee per SDR, and a per-meeting fee calculated from an agreed ROI goal.

demandDrive highlights Qorvo's $136M in “new converted opportunities” on its homepage. The firm offers both outsourced SDR retainers and appointment setting.

Its pay-per-result model suits large enterprises with broad target markets, transactional deals and short sales cycles, according to its service page. For complex deals, long cycles or narrow markets, it recommends the SDR retainer. Outcome programs have a VP of Client Success and weekly reporting.

Launch Leads' published record includes 152,000+ qualified appointments. The firm says it has done only B2B appointment setting since 2009. Its meetings must have verified pain, decision authority and an active timeline. Appointments are briefed and exclusive to the client, with a dedicated US-based SDR team and account research included.

Its pricing FAQ gives 5–10 business days for onboarding, with outreach starting in week one; the homepage says first qualified appointments “often land within the first couple of weeks.” The monthly retainer depends on scope and appointment volume, including buyer seniority, research depth and channel mix.

Martal publishes an average monthly funnel for Tier 1A: 20–30 qualified leads from 3,000–5,000 targeted prospects. Its homepage describes 200+ sales executives across North America, the EU and Latin America.

The outbound tier includes appointment booking and, in September 2026, a three-month pilot followed by a flat monthly subscription. Higher tiers add nurturing through signing, customer onboarding and account management, with four-month pilots followed by monthly subscriptions at a flat fee plus sales commission.

Across its business, OutboundView reports 1,000+ meetings a month and 50+ active clients. Its dedicated appointment-setting teams focus on calling; sales process consulting is also available to help clients convert meetings.

The homepage says most campaigns are live within two weeks, with representatives calling by week two. Most clients start with a 90-day pilot, then move month to month. A separate page advertises a two-week paid trial, explained in a video; ask which arrangement applies to your campaign and what each costs and commits you to. Its FAQ says reps “introduce themselves as part of your team” and that prospects “have no idea they're speaking with an outsourced caller.” Decide whether that is how you want callers to identify themselves before the pilot starts.

SalesPro Leads publishes a testimonial from an unnamed regional technology firm's CEO reporting several contracts exceeding $100,000 after using its program. Its appointment setting targets decision-makers at B2B technology companies.

It also offers sales intelligence campaigns and custom prospect databases. Have the proposal separate research from outreach, and request a reference for the work you intend to buy.

Sapper's homepage lists a manufacturing client that booked 31 meetings and closed three deals in five months. Its client base exceeds 2,000 across 80+ industries. It says it reimagined its process in 2021, reaching buyers through email and direct mail; its offer also includes phone and LinkedIn. The stated market requirement is more than 2,000 potential B2B companies. Confirm the services and appointment targets in your tier. Sapper's seven- and 13-month terms are longer than Martal's published three-month outbound pilot and the 90-day pilot most OutboundView clients start with. Confirm the minimum commitment and exit terms in each proposal.

Its homepage says, if targets are missed, “We work for free until we do.” The FAQ promises to “work for free for 3 months!” if the meeting guarantee is missed. Resolve those different remedies in the contract.

SeeResponse's outbound service page credits its KindKatch program with 100 demos booked and five new clients. The page describes cold-email work from account research and list building through copywriting, sending, reply handling and appointment setting, led by a senior consultant with specialists handling delivery.

You can buy the full program or selected parts alongside your in-house team. Agree who qualifies interested replies and what reaches the seller before a meeting.

UnboundB2B reports a 250% increase in conversions from marketing-qualified leads to sales-qualified leads for RingCentral. The firm serves large enterprises and fast-growing scale-ups with SDR services, content syndication, account-based programs and sales-qualified leads.

A content response and a booked sales conversation represent different stages of interest. Specify the deliverable, qualification and next contact for each part of the program.

VSA reports more than 50,000 sales appointments across its business. The US-based call center lists B2B appointment setting, inbound call handling, inside sales and market research, making it relevant to a brief involving several kinds of phone work.

Scope prospecting separately from inbound support so the proposed staffing and measures address each job.

VSynergize's telemarketing service includes B2B and B2C outreach, lead qualification and appointment setting. Its business-process outsourcing offer separately lists prospect research, data enrichment and sales administration.

Its homepage presents the firm as an AI-powered BPO and contact-center provider, and its pages list addresses in Pune, India and Westborough, Massachusetts.

Scope the B2B work separately if the proposal also covers customer support or consumer calling.