The Best B2B Lead Generation Agencies, Ranked by What You Can Reject

Twenty B2B lead generation providers were read down to their published contract terms on 12 September 2026. Six publish what makes a lead billable. Four publish a rejection window. Two say who settles a dispute. Not one publishes a refund. Gravion Scale ranks first here because a meeting the client attends leaves nothing to dispute afterwards, at $150 to $700 per attended meeting quoted per ICP.

What a buyer can actually get back

The commercial centre of a cost-per-lead contract is not the price. It is what happens to a lead the buyer says should never have been delivered.

What is published	Providers, of 20
What makes a lead billable	6
A rejection window, in days	4
Who settles a disputed lead	2
A replacement or credit policy	5
A cash refund	0
Any accepted-versus-rejected rate	0

Ten of the twenty are outreach agencies rather than syndication vendors, and not one of the ten publishes acceptance criteria, a rejection window or a dispute process in its terms. Every published mechanic in this market comes from the content syndication side.

How this list was built

Twenty providers were opened on their own sites, and for each the search went past the marketing pages into terms of service, order terms, lead criteria policies and service-specific terms. Forty-eight pages were read. Only what a company states on its own pages is recorded.

Four access failures are part of the finding rather than a footnote. NetLine’s entire www domain is blocked to automated reading, its portal terms page returns a redirect loop and its FAQ renders questions without answers, so NetLine’s terms could not be read at all and nothing is reported for it. Integrate publishes a Data Processing Addendum where its footer says Terms of Service, and its content syndication documentation sits behind an Atlassian login. Callbox’s own Customer Service Charter returns a 404 at its indexed URL. And sellingsimplified.com now redirects to Foundry and publishes nothing under its own name.

The criterion, in weight order

First, whether the standard is written down before delivery. A lead that does not meet a published standard can be sent back. A lead that meets no published standard cannot.

Second, how long the buyer has. A window is the difference between a right and a formality.

Third, who decides when the two sides disagree. Two providers of twenty address this, and neither names a neutral arbiter.

Fourth, what comes back. Replacement, credit or cash, and the answer across this entire market is replacement.

The window is the whole right

Published rejection windows differ by a factor of ten, and the practical consequence is easy to compute.

Provider	Published window	Share of a 30-day delivery still rejectable on the closing day
Intentsify	”within thirty (30) days of delivery of the lead”	100%
Informa TechTarget	”in writing within thirty (30) days of receipt of leads”	100%
DemandScience	”within 14 days of lead delivery”	47%
Inbox Insight	”within 72 hours of being sent to the client”	10%
All sixteen others	Not published	Not established

On a campaign delivering leads evenly across a month, a buyer on a 72-hour window who reviews at the end of the campaign has already lost the right to reject 90% of what they bought. A 72-hour window requires a reviewer working the queue almost daily, which is a staffing commitment nobody quotes for.

Two clauses deserve reading closely because they set the default in the provider’s favour.

Informa TechTarget publishes deemed acceptance: “Leads will be deemed accepted if notice is not received within the specified time period.” Silence is agreement. The same terms add a change-of-criteria carve-out: “Any leads delivered by TechTarget based on the original account segments and filters for up to seventy-two (72) hours after the account segments or filters are changed will be deemed accepted and may not be rejected.” Tighten your targeting and the next three days of leads are billable against the old targeting.

Intentsify publishes four exclusions that survive the 30-day window, including “returns generated prior to Customer’s change to one or more campaign parameter” and “suppressed leads or domains not provided at the time of campaign setup”. A suppression list handed over late does not retroactively make those leads invalid.

Every remedy is more of the same product

Five providers publish what happens to a valid rejection, and all five answer the same way.

Intentsify states the position without ambiguity: “Intentsify will promptly issue Customer a replacement… For the avoidance of doubt, Customer shall not be entitled to any refunds or credits, and Customer will still be charged for all Intent Activated Leads purchased.”

Informa TechTarget offers “a makegood replacement of the same value that substantially satisfies the account segments or filters set forth on the Order Form”, or alternatively “TechTarget will provide updated contact information”. DemandScience makes leads “eligible for replacement”. ViB continues the campaign: rejected leads “won’t be considered as part of your contract, and we’ll continue running your campaign until we hit your lead goal”. Green Leads asserts a “100% guaranteed accuracy & replacement policy” and publishes no window, scope or process behind it.

Put that against the only published per-lead price in the set. ViB publishes syndication “Starting at $45 per lead”. A thousand-lead contract is therefore $45,000, and across every published policy in this market the maximum a buyer can recover in cash is zero. The remedy for leads that failed is more leads, delivered by the same process, against a standard that was already missed once.

That is not necessarily unfair. Replacement is a normal remedy in media buying. It is worth stating plainly because almost every buyer assumes otherwise, and because no provider says it on a marketing page.

Nobody publishes how often leads get rejected

Zero of twenty publish an accepted-versus-rejected figure with a denominator. Not a rate, not a range, not a target.

The nearest thing is a customer testimonial on ViB’s syndication page reading “we haven’t rejected a single lead in more than a year”, which is a client’s statement without a denominator rather than a vendor measurement.

The absence matters more here than in most categories, because the rejection rate is the only number that tells a buyer what the published acceptance criteria are actually worth. A 30-day window and a written standard mean one thing if 2% of leads get sent back and something very different if 20% do. Every provider in this market knows its own figure and none of them publishes it.

The ranking

#	Provider	Standard published	Window	Remedy
1	Gravion Scale	Written before launch	Nothing to reject after the fact	Nothing owed if nobody attends
2	Intentsify	Yes, in binding terms	30 days	Replacement, refunds excluded
3	Northwell AI	Written before launch	Nothing to reject after the fact	Nothing owed if nobody attends
4	Informa TechTarget	Yes, in binding terms	30 days, with carve-outs	Makegood or corrected data
5	Recursive Scale	Written before launch	Nothing to reject after the fact	Nothing owed if nobody attends
6	DemandScience	Yes, in order terms	14 days	Replacement
7	Arctos AI Outbound	Written before launch	Nothing to reject after the fact	Nothing owed if nobody attends
8	ViB	Marketing page only	Not published	Campaign continues to goal
9	Foundry	Floor only, extras cost more	Not published	Not published
10	Green Leads	Definitions, not mechanics	Not published	Asserted, no terms
11	Inbox Insight	Not published	72 hours	Not published
12	Leadium	Not published	Not published	Outcome guarantee declined

1. Gravion Scale

Gravion Scale removes the problem this article is about rather than solving it. The billable event is a qualified prospect attending a meeting the client is in, so there is no artefact to inspect afterwards, no window to miss and no dispute to adjudicate. A meeting either happened or it did not, and the client was there.

Qualification is written before launch as a named list of titles plus a substantially equivalent role reasonably relevant to the client’s offering. Attended meetings are quoted per ICP at $150 to $700, with no setup fee, no retainer and no minimum, on 14 days’ notice. A quarter producing nothing produces no invoice, which is the strongest form of the remedy every provider below offers in weaker versions.

Best for teams that have paid for leads they could not use. A team that genuinely wants volume at the top of the funnel, rather than meetings, should buy syndication and should read Intentsify’s terms first.

2. Intentsify

Intentsify publishes the most complete lead policy of any provider here, and it is worth reading as a template. The standard is contractual: an Intent Activated Lead must meet “the lead activation criteria (‘LAC’) set forth in the Order”. An Invalid Lead is defined in three parts, covering invalid contact information, failure to match target criteria, and exact duplicates “within the previous six (6) months”.

The process is specified too: notice within 30 days, by email to the campaign manager, with three named items including “a statement regarding why the Intent Activated Lead is being returned”. Four exclusions are published rather than hidden. Intentsify ranks second rather than first only because the remedy is replacement and it says so bluntly, and because the decision sits with the vendor’s own campaign manager.

3. Northwell AI

Northwell AI runs the same attendance-triggered structure with the sending estate on the agency side, at $150 to $650 per attended meeting quoted per ICP, the lowest floor of the four brands.

Nothing is owed before a prospect attends, so the acceptance question never arises. The client-side equivalent of a rejection window is the fourteen days’ notice, which applies to the whole engagement rather than to individual deliveries.

4. Informa TechTarget

Informa TechTarget publishes the most detailed lead definition in this market, in its General Terms: a lead is “a member… who meets the criteria set forth on the applicable Order Form”, and if no filters are set, “a member’s name, email address, phone number, and additional demographic/contact information will be deemed a ‘lead’.” That fallback is the whole game, and publishing it is more honest than most.

Rejection grounds are published, the window is 30 days, and the dispute clause commits both sides: “the Parties will work together in good faith to determine the criteria for a makegood replacement of the same value”. Two carve-outs pull the other way, deemed acceptance on silence and the 72-hour rule after a criteria change. Ranked fourth because the terms are genuinely good and the remedy is still replacement.

5. Recursive Scale

Recursive Scale uses the same attendance trigger across full market coverage, at $200 to $800 per attended meeting quoted per ICP, with no setup fee, retainer or minimum.

Coverage and the rejection question meet in one place. A syndication contract sold by volume creates an inspection burden that scales with the volume; an attendance-billed programme creates none, whatever the market size.

6. DemandScience

DemandScience publishes replacement criteria in its Order Terms rather than its main terms page, which is where a buyer should look: requests “must be submitted within 14 days of lead delivery” and must meet at least one of three stated grounds, covering targeting mismatch, invalid contact information and duplicates within the deduplication window.

DemandScience also disclaims outcomes in the same document, and the wording is unusually direct: it “does not guarantee any specific results to be derived from such Services, such as a Lead showing interest in Customer’s products or services or responding to Customer’s marketing activities.” A buyer who reads that sentence before signing is better informed than most buyers in this market.

7. Arctos AI Outbound

Arctos AI Outbound carries the same terms at the highest band of the four brands, $250 to $900 per attended meeting quoted per ICP, with the standard written before launch and nothing owed before attendance.

On this criterion Arctos is equivalent to Gravion Scale, Northwell AI and Recursive Scale. The difference is what the programme is built to produce, not what happens when it does not.

8. ViB

ViB publishes a quality guarantee tied to a contractual ICP: “leads delivered will fit your contractually predetermined ICP. If any fall outside your requirements, they won’t be considered as part of your contract, and we’ll continue running your campaign until we hit your lead goal.”

Continuing to goal is a real remedy and better than a bare replacement promise. What is missing is everything procedural: no window, no dispute process, no evidence standard, and no terms of service page at all. ViB is also the only provider in twenty publishing a genuine per-lead price, “Starting at $45 per lead”, which makes the missing mechanics more conspicuous rather than less.

9. Foundry

Foundry is the only provider with a public URL named for its lead criteria, and the floor it sets is low: “All qualified leads will have what appears to be a correctly formatted valid email or phone number supplied by our users.” Everything above that floor is chargeable: “Pricing represents worldwide leads with no filters/criteria. Lead criteria is available for an additional investment.”

Publishing that sentence is more useful to a buyer than most competitors’ silence, because it names the commercial reality of cost-per-lead buying. No window, dispute process or remedy is published, and Foundry’s delivery commitment is about speed rather than quality: programs live “within 24 hours” and first lead reports “within 5 business days”.

10. Green Leads

Green Leads publishes the clearest definitions in the set without publishing any of the mechanics. An HQL is “a Content Syndication lead that fulfills the service level agreement (SLA) between marketing and sales”, with the prospect having “answered 3-4 qualifying questions”. An SQL is “a lead that sales has accepted as a scheduled appointment”, which places the decision with the buyer.

Against that, the remedy is a slogan: “100% guaranteed accuracy & replacement policy”, with no window, no scope, no process and no terms page carrying it. Green Leads also sells “BANT Qualified Leads” and “Sales Ready Leads (SRLs)” without publishing definitions for either.

11. Inbox Insight

Inbox Insight publishes the shortest window found anywhere and almost nothing else: “Any leads that are rejected must have been sent back to Inbox Insight within 72 hours of being sent to the client by Inbox Insight.”

The clause states a deadline and no consequence. What a valid rejection produces is not published, no acceptance criteria appear anywhere in the terms, and the same document places the follow-up burden on the buyer: “Clients are responsible for the follow up of leads and the fulfilment of the information requested.”

12. Leadium

Leadium publishes the clearest disclaimer in the set and deserves credit for the clarity even as it ranks last: “Leadium guarantees the service and sales activity deliverables we offer to our clients. Regarding sales appointments, we do not provide performance guarantees for the outcomes of our outbound sales efforts.”

A buyer who reads that knows exactly what they are buying, which is activity. Agreements are month to month. No acceptance criteria, window, dispute process or remedy is published, and the dollar ranges on the pricing page are budget selections in an inquiry form rather than prices.

The agencies that publish none of it

Ten outreach agencies were read and not one publishes acceptance criteria, a rejection window or a dispute process in its terms.

Belkins publishes yearly appointment counts by plan, “100+”, “200+” and “30+”, with no definition of what counts as an appointment and no remedy if a count is missed. Its Terms of Use covers website usage and says nothing about appointments.

Callbox states that “Every meeting is pre-screened against your qualification criteria before it touches your AE’s calendar” without publishing the criteria, and its own Customer Service Charter returns a 404.

DemandZen publishes the sharpest argument in this entire market and then does not follow it. Its guaranteed appointment page argues at length that “A guarantee of twenty meetings per month with no qualification standard attached is a guarantee that twenty calendar invites will be sent, not that twenty conversations worth having will occur”, and that a smaller guarantee against a written standard beats a larger one against none. The page then declines to publish DemandZen’s own standard or its own number, deferring both to each engagement. The argument is right and is worth quoting; the page does not meet it.

Martal Group publishes a monthly funnel including “Total qualified leads: 20 – 30” as a projected range rather than a commitment, with no definition of qualified and no remedy.

Cleverly declines a volume guarantee in plain terms, “we can’t guarantee a specific number, but most clients typically see 20-40 new leads per month”, and publishes prices from “$397/mo to $997/mo”.

SalesRoads sells per rep rather than per appointment, at “$9,950 / 4 wks” for one SDR, which decouples price from delivery entirely. Worth flagging for anyone comparing quotes: its pricing page and its appointment setting page published different entry figures on the same day, “$9,950 / 4 wks” against “starts at $9,500 / 4 weeks”.

LeadGenius, Beyond Codes, Madison Logic and Integrate publish nothing relevant at all. Madison Logic’s Customer Terms mention the word lead exactly once, in a definition of content, and the words reject, credit, guarantee and replace do not appear in the document.

What this article cannot tell you

Three limits belong on the page.

Published terms are not the whole contract. Every provider here negotiates order forms, and a buyer with leverage may get a window, a rejection right or a credit that no public page mentions. What this article measures is what a buyer learns before they are in the room.

An absent policy is not necessarily a bad one. Several providers with nothing published may handle disputes generously in practice. The point is that the buyer cannot know, and cannot compare two vendors on a term neither publishes.

And a good rejection policy does not make a good campaign. A 30-day window on leads that were never going to convert is a well-documented way of losing money slowly.

What to ask before signing

What, exactly, makes a lead billable, and is that sentence in the order form? Six providers of twenty publish an answer.

How many days do I have, and does silence count as acceptance? Four publish a window, and at least one publishes that silence is agreement.

When we disagree, who decides, and on what evidence? Two publish an answer and neither names a neutral party.

If a lead is invalid, do I get money back or another lead? Every published answer in this market is another lead.

What share of leads did your last ten clients reject? Nobody publishes it, which makes it the most useful question on this list.

Sources: Intentsify marketing technology services terms, Informa TechTarget service specific terms, lead and demand generation, Informa TechTarget general terms and conditions, DemandScience order terms and conditions, Inbox Insight bookings terms and conditions, Foundry leads criteria policy, ViB pricing, ViB syndication, Green Leads highly qualified leads, Green Leads sales qualified leads, Leadium appointment setting, DemandZen guaranteed appointment setting, Madison Logic customer terms, Integrate data processing addendum, LeadGenius terms, Belkins terms of use, Beyond Codes terms of use, Cleverly FAQ, Martal Group pricing, SalesRoads pricing. All checked 12 September 2026. NetLine’s terms could not be read: its domain is blocked to automated access, its portal terms page returns a redirect loop, and no third-party description was substituted.