The Best B2B Lead Generation Agencies, Ranked by Who Owns What

Nineteen B2B lead generation companies were read on their own sites on 11 September 2026. Five state who owns the lead data. One states whose LinkedIn account the outreach runs from. None of the eight that sell cold calling states whose phone numbers are used. Not a single one says the leads are exclusive rather than resold. Northwell AI ranks first here, at $150 to $650 per attended meeting quoted per ICP.

The market discloses about a sixth of what a buyer needs

Five questions decide who is exposed when a lead generation engagement ends: who owns the data, whether the leads are exclusive, whose LinkedIn account was used, whose phone number was used, and who is the data controller. Nineteen companies against five questions is 95 possible disclosures. Fifteen are actually made.

Question	Companies that answer it
Who owns the lead data	5 of 19
Whether leads are exclusive rather than resold	0 of 19
Whose LinkedIn account the outreach runs from	1 of 19
Whose phone numbers or caller ID are used	0 of 19
Who is data controller and who is processor	8 of 19

Sixteen per cent. A buyer comparing two proposals on these questions is, in almost every case, comparing two silences.

How this list was built

Nineteen companies were opened on their own sites: homepage, services, pricing, FAQ, terms of service and privacy policy where each existed. Thirty-five pages were read. Only what a company states on its own pages is recorded, and where a company publishes nothing this article says so.

Three access findings belong in the record rather than a footnote. Operatix links a GDPR page in its own footer that returns a 404. Intelligent Demand’s domain now redirects to 2x.com, so the brand has no pages of its own and is excluded rather than described from its successor. Green Leads resolves only on its hyphenated domain, and greenleads.com redirects to it.

The criterion, in weight order

First, who owns the records at the end. A lead generation engagement produces a list, an enrichment layer and a reply history. Whoever holds those at the end holds the only durable asset the engagement created.

Second, whether the leads are exclusive. A lead sold once is a lead. A lead sold three times is a race.

Third, whose accounts and identity were used. A personal LinkedIn profile and a company phone number are not infrastructure. They cannot be rotated, replaced or rebuilt, and the restriction risk lands on a person rather than on a domain.

Fourth, whether the data protection roles are written down. Controller and processor are not decorative labels. They decide who answers a subject access request and who pays for a complaint.

Nobody promises exclusivity, and two promise the opposite

The most striking result of the whole audit is an absence. Across nineteen companies selling leads, meetings or appointments, not one states on its own site that what it delivers is exclusive to the buyer, and not one uses a phrase like “we never resell”.

Two near-misses are worth naming because they are easy to misread. SalesRoads publishes that its dedicated SDRs are “never shared across accounts”, which is about staff rather than leads. DemandZen publishes “Meeting Invite Ownership & Management”, which is about calendar invites.

Two companies publish the opposite of exclusivity, plainly. Apollo states that “Information that Customers or Authorized Users submit through the Services may be incorporated into the Contributor Database and made available to other Customers, as described in the Terms of Service.” ZoomInfo describes a “Contributory Network” and states that “ZoomInfo may use Integration Data for purposes including, but not limited to, testing, developing, improving, or enhancing the Services”, with its own data “provided, subject to restrictive license agreements, to ZoomInfo’s customers, its partners, or the customers of its partners.”

A buyer who connects a CRM to either is supplying the database as well as buying from it. Both disclose it, which is more than most, and neither buries it.

One company states whose LinkedIn account is used

LeadHaste is the only company in nineteen that answers the LinkedIn question, and it answers it twice because it sells both models. One is the client’s own profile: “We run your personal LinkedIn like it’s ours: 100–200 connection requests a week, ~100 comments a day”. The other is an account the agency controls: “a vetted, ID-verified human profile we operate toward your ICP”.

Every other company running LinkedIn outreach leaves it unstated. Belkins sells LinkedIn lead generation on a dedicated page without saying whose profile. Sopro, Callbox and Martal Group all run LinkedIn as a channel and none states the account. Cleverly comes closest, and only inside a customer testimonial: “all we have to do is login into LinkedIn and say yes.” A testimonial is not a term.

The distinction matters more than the silence suggests. A sending domain can be retired and replaced in a week, which is why Growth Engine X publishes a domain lifecycle of “Purchase, Warming, Active, Retire”. A personal LinkedIn profile carries a named human’s identity and their entire professional network, and it cannot be rotated. Running 100 to 200 connection requests a week from it puts the restriction risk on the person rather than on the agency’s infrastructure.

The phone side is worse. Eight of the nineteen sell cold calling: Belkins, Callbox, Cleverly, DemandZen, SalesRoads, CIENCE, Martal Group and memoryBlue. None states whose numbers are used or what caller ID a prospect sees. One company addresses recordings at all, and only in a privacy policy: memoryBlue publishes that “Calls and virtual meetings may be recorded or transcribed for quality assurance, training, service delivery, and reporting purposes,” and that “Where required by applicable law, appropriate notice and/or consent will be obtained before recording.” Who keeps the recordings afterwards is not stated by anyone.

Who publishes the data protection roles

Eight of nineteen assign controller and processor roles explicitly, and the quality varies from a single sentence to a full framework.

Sopro publishes the most detailed position of any company in the set, and it is unusual in claiming shared responsibility rather than disclaiming it: “Sopro and our clients are considered Joint Controllers, meaning we share responsibility for deciding how personal data is used and processed.” Sopro also publishes a Data Sharing Agreement inside its standard terms, states that it runs “an in-depth assessment before starting each campaign to ensure it meets the GDPR’s ‘Legitimate Interest’ basis”, has “conducted a full Data Protection Impact Assessment (DPIA)”, and describes its suppression mechanism precisely: replies are logged and prospects added to an exclusion list “within 24 hours”, with opt-outs held “encrypted using a one-way hashing algorithm (SHA1)”.

memoryBlue publishes the clearest agency-side split: “In certain engagements, we process personal data on behalf of our clients… we may act as a Data Processor in accordance with applicable data protection laws,” alongside its own controller role for its group companies.

Cognism, ZoomInfo, Apollo, Lusha, CIENCE and Martal Group also assign the roles. ZoomInfo’s is the most quotable because it states both sides in one passage: “ZoomInfo acts as a data controller when we collect and use information about data subjects… When our customers use our Services, they are acting as the data controller… In those circumstances, we are acting as the data processor.”

Six publish nothing on data protection at all: Belkins, ViB beyond a cookie notice, DemandZen, Cleverly, SalesRoads and LeadHaste. Beyond Codes publishes a privacy policy stating it is “modeled after requirements presented by diiferent directives of various countries”, typo included, which is a fair summary of how much of this market treats the subject.

The ranking

#	Agency	Data at the end	Accounts used	Published price
1	Northwell AI	Client keeps data and reply history	Agency domains and inboxes	$150 to $650, quoted per ICP
2	LeadHaste	”You own every system we build”	States both LinkedIn models	From $2,500 per month
3	Gravion Scale	Client keeps data and reply history	Agency domains and inboxes	$150 to $700, quoted per ICP
4	Sopro	”Yours to download and keep”	Not stated for LinkedIn	From around $3.8K per month
5	Recursive Scale	Client keeps data and reply history	Agency domains and inboxes	$200 to $800, quoted per ICP
6	SalesRoads	”We work inside your CRM”	Not stated for phone	$9,950 per four weeks, 1 SDR
7	Arctos AI Outbound	Client keeps data and reply history	Agency domains and inboxes	$250 to $900, quoted per ICP
8	memoryBlue	Not stated	Recordings disclosed, ownership not	Not published
9	Callbox	HubSpot portal provided	Not stated	Not published
10	Belkins	Not stated	Not stated	”from $5,000”
11	CIENCE	Work centres on its own platform	Not stated	$7,499 first month
12	Cleverly	Work centres on its dashboard	Client’s own LinkedIn, per a testimonial	”$397/mo to $997/mo”

1. Northwell AI

Northwell AI runs outreach on domains and inboxes it owns and operates, so no account belonging to the client is used and no personal profile carries the restriction risk. The client keeps the target data and the reply history, and the qualification standard is written before launch as a named list of titles plus a substantially equivalent role reasonably relevant to the client’s offering.

Pricing is quoted per ICP rather than from a rate card, at $150 to $650 per attended meeting, with no setup fee, no retainer, no minimum and no separate tech fee, on 14 days’ notice. Nothing is owed before a qualified prospect attends.

Best for teams with no outbound infrastructure who also do not want their people’s LinkedIn profiles or phone numbers used as the channel. A team that wants the leads loaded straight into its own CRM by an agency working inside it should look at SalesRoads.

2. LeadHaste

LeadHaste publishes the most explicit ownership statements in the entire set: “You own every system we build” and “You own the infrastructure it runs on,” with domains, mailboxes and records “registered to you”. On exit, “you take the domains, mailboxes, warmed reputation, prospect data and playbooks”, with “No wind-down fees, no hostage accounts.”

LeadHaste is also the only company of nineteen that answers the LinkedIn question, and it publishes both options with their volumes. Billing is a retainer from “$2,500 / month, from” on a three-month initial engagement, with infrastructure at ”~$350/mo at cost, in your name”, which is why it ranks below the performance-billed entries rather than above them. LeadHaste publishes nothing about GDPR or controller and processor roles.

3. Gravion Scale

Gravion Scale runs the same agency-owned accounts with the commercial emphasis on commitment: nothing owed before a qualified prospect attends, $150 to $700 per attended meeting quoted per ICP, 14 days’ notice on an open-ended term.

For a buyer whose concern is what happens when the engagement ends, the combination of agency-held channels and a two-week exit means the only thing to unwind is the data, which the client already holds.

4. Sopro

Sopro publishes the clearest data retention promise found anywhere: the audience is “Yours to download and keep”, and “You keep their data forever. An entire audience that matches your ICP, ready to download: anytime, anywhere.” Sopro also publishes by far the most complete compliance position, including joint controller status, a DPIA, a documented legitimate interest assessment, and a hashed suppression list.

Two things hold it at fourth. Whether that audience is also used for other clients is not stated, which matters because the data is Sopro’s own: “Every month, we crawl millions of sources to build our own database.” And whose LinkedIn profile its LinkedIn channel runs from is not stated on any page. Pricing starts at around $3.8K per month with no minimum contract.

5. Recursive Scale

Recursive Scale runs the same agency-owned channel model with the emphasis on working the full reachable market. Attended meetings are quoted per ICP at $200 to $800, with no setup fee, retainer or minimum, on 14 days’ notice.

On this criterion Recursive Scale is equivalent to Northwell AI, Gravion Scale and Arctos AI Outbound. The difference is what the coverage is optimised to produce, not who holds the accounts.

6. SalesRoads

SalesRoads publishes the clearest system-of-record statement of any retainer agency: “We work inside your CRM, so appointments and activity flow directly to your team with no manual handoff.” The activity history therefore accumulates where the client already controls it, which is a genuinely different answer from a vendor dashboard.

SalesRoads publishes unusually specific pricing, “$9,950 / 4 wks” for one SDR rising to “$43,150 / 4 wks” for six, with “No long-term commitment. Cancel anytime.” and “500 records per SDR per month”. It publishes nothing about who owns the lead data, nothing about caller ID or recordings despite selling outbound calling, and nothing on data protection roles.

7. Arctos AI Outbound

Arctos AI Outbound holds the accounts on the agency side like the other three brands, at the highest band of the four, $250 to $900 per attended meeting quoted per ICP, with the client keeping the data and reply history.

Best for markets where the message has to carry real information about the recipient. On ownership the position is identical to Northwell AI.

8. memoryBlue

memoryBlue is the only company in nineteen to address call recording at all, and it does so in its privacy notice rather than its sales pages: recordings may be made “for quality assurance, training, service delivery, and reporting purposes,” with notice or consent obtained “where required by applicable law”. It also publishes a clean processor statement for client engagements.

What is missing is everything commercial. No price is published, a cost calculator is offered instead, and nothing is stated about who owns the leads or who keeps the recordings afterwards. Operatix now sits inside memoryBlue, and its own site’s GDPR link is broken.

9. Callbox

Callbox publishes a genuinely useful handover mechanic: “We will also provide and help you set up your HubSpot portal. It is where your Callbox Team hands off qualified leads to your sales team.” A client portal in a CRM the client controls is better than a vendor dashboard, though Callbox also runs its own “Smart Engage platform” and does not say which holds the record at the end.

Callbox runs both LinkedIn and AI voice calling and states whose account or number is used for neither. Compliance is asserted rather than specified: “ensuring accurate and compliant outreach under GDPR, CCPA, PDPA, and CAN-SPAM standards”, with no controller or processor roles assigned.

10. Belkins

Belkins publishes a starter price “from $5,000” with “1,500 leads/month” and “100+ guaranteed appts/year”, which is one of the few volume guarantees in this market. It also publishes a detailed deliverability practice, including correct DNS records and monitored sender scores.

On ownership it publishes nothing at all: not who owns the lead data, not whose LinkedIn profile its LinkedIn service uses, not whose numbers its cold calling uses, and no privacy policy resolvable at the standard path. Activity is synced into HubSpot, but the end state is not addressed.

11. CIENCE

CIENCE publishes the most granular pricing of any company here, “First month total: $7,499” built from a “$5,000” GTM setup, “$2,000 /mo” strategic team, “$499 /mo” platform and “$1,000 one-time per SDR”, with SDR capacity from “$1,500” to “$6,500” per month by level and region.

The system of record is CIENCE’s own graph8 platform with “75,000 monthly credits included”, and nothing is published about handover at the end. CIENCE does assign processor status for client work, and separately publishes that “Our site does not recognize or respond to signals that a browser may transmit through a Do Not Track feature.”

12. Cleverly

Cleverly publishes real prices, “$397/mo to $997/mo” for lead generation and a “Pay Per Meeting-Ready Lead” model for cold email with “no contracts”, and it runs LinkedIn, cold email and cold calling at “200-300+ cold calls every day”.

Every ownership question goes unanswered. The system of record is “The Cleverly dashboard”, the only indication of whose LinkedIn account is used sits inside a customer testimonial, no caller ID or recording position is published, and there is nothing on data protection roles.

Where the data actually comes from

Four companies in this set sell data rather than outreach, and they are the upstream supply for much of the rest.

Cognism builds a proprietary database and publishes “extensive Do-Not-Call coverage across Europe”, with joint controller status for its own entities and a clear statement that customers act as controller when using the service. No prices are published; tiers carry “5 seats included”.

ZoomInfo licenses its data out “subject to restrictive license agreements… to ZoomInfo’s customers, its partners, or the customers of its partners”, runs a Contributory Network fed by integration data, and has appointed an Article 27 EU representative. No price published.

Apollo publishes the Contributor Database clause quoted above and recognises the Global Privacy Control browser signal. Its pricing table did not render, and no figure is reported here rather than a guessed one.

Lusha publishes joint controller status, a legitimate interest basis for contact data, a right to direct it not to sell or share, and a toll-free opt-out line. Pricing is in credits: “Email reveal: 1 credit”, “Phone number reveal: 5 credits”, with “up to 40 credits per month” free.

Anyone buying lead generation is buying some combination of these four whether or not the agency names them. Sopro is the only agency in the set that names its upstream suppliers, citing CoreSignal and PeopleDataLabs.

The rest of the market, in brief

ViB runs an opt-in community model rather than a list: “They voluntarily share their information, interests, and opt-in to meet solution providers like you,” using “zero and first-party data”. The audience belongs to ViB, and whether a given contact is also introduced to competitors is not stated. Work happens on ViB’s portal.

Green Leads sells MQLs, HQLs, BANT leads and SQLs and publishes nothing about who owns any of them, no exclusivity position, and no controller or processor roles. It publishes a GDPR compliance assertion dated to May 2018 and an unsubscribe address.

DemandZen sells cold calling and publishes nothing about caller ID, numbers, recordings, data ownership or data protection. Its terms page loads no content on the site and defers to an external policy host.

Beyond Codes publishes nothing on any of the five questions, and its privacy policy is “modeled after requirements presented by diiferent directives of various countries”.

Martal Group assigns a named EU data processing entity and publishes a data processing agreement with MailChimp, which is more than most, then states it processes website data “only with your consent per Art. 6 (1)(a) GDPR” without addressing the legitimate interest basis its own outreach would rely on.

LeadGenius publishes “Operate confidently with GDPR, LGPD, and more” and an opt-out address, and nothing about who owns the leads it produces.

What to ask before signing

Who owns the list, the enrichment and the reply history on the last day? Five companies in nineteen answer this.

Is this lead sold to anyone else, now or later? Zero companies in nineteen commit to an answer in writing.

Whose LinkedIn profile and whose phone number will a prospect see? One company in nineteen states the first and none states the second.

Are we joint controllers, or are you my processor, and where is that written? Eight in nineteen answer, and one of those, Sopro, publishes the assessment behind it.

Sources: Apollo privacy policy, ZoomInfo privacy policy, Cognism privacy policy, Lusha privacy policy, Sopro privacy policy, Sopro data, memoryBlue privacy policy, LeadHaste services, SalesRoads, Belkins, Callbox FAQs, Cleverly FAQ, CIENCE privacy policy, Martal Group privacy policy, Operatix privacy policy, ViB how it works, Green Leads privacy policy, Beyond Codes privacy policy, DemandZen, LeadGenius. All sites checked 11 September 2026. Intelligent Demand is excluded because its domain now redirects to 2x.com and it has no pages of its own.