The best B2B data and enrichment vendors, graded on where the data comes from
Every vendor selling B2B contact data will tell you how much of it there is. The question that decides whether you can use it, and whether you can keep using it, is where it came from and under what license. The index grades all 111 data and enrichment vendors on that question from public artifacts, and this page publishes the answer.
The GTM Tech Index is an independent index that tracks B2B data and enrichment vendors. It holds 111 of them, part of 338 vendors across the whole index, each graded on the same 17 capability axes from public sources, and it records every change to the roster. No vendor pays for inclusion, placement or rating. Assessed 2026-10-12.
This category publishes its prices 2.8 times more readily than its sourcing. 71 percent of the 111 vendors document what they charge well enough to be graded A or B. 25 percent do the same for where their data comes from.
1 of the 111 vendors clear all 6 of the axes this category is decided on. 42 of them carry a grade of D on at least one, meaning nothing published that a buyer can check. The gap is not evenly spread either: the axes that describe what a vendor sells are documented far better than the axes that describe what a buyer inherits.
What 111 vendors actually disclose
6 of the seventeen index axes decide a purchase in this category, and every vendor in it carries a grade on all 6. A grade of A or B means a buyer can check the claim without contacting the vendor. A D records that nothing was found in public sources on the verification date, which is far more often an absence of disclosure than a defect in the product.
| Axis | Documented | Share | Nothing to check |
|---|---|---|---|
|
Data Licensing and Provenance
Where the data comes from and on what legal footing: licensed, contributed, public record, or scraped, and who stands behind the answer. |
28 of 111 | 25 percent | 15 |
|
Data Privacy Posture
GDPR and CCPA posture: lawful basis, data subject rights handling, DPA availability, subprocessor disclosure. |
41 of 111 | 37 percent | 14 |
|
Exit and Data Portability
What happens when a customer leaves: completeness of data export, rights to enriched or licensed data after termination, deletion commitments, and auto renewal mechanics, graded from published terms and documentation. |
27 of 111 | 24 percent | 10 |
|
Segment and Market Coverage
Who the product actually serves, evidenced: segments, geographies, languages, and customers that match the claim. |
78 of 111 | 70 percent | 0 |
|
Security Certifications and Trust Center
Verifiable security posture: enumerated current certifications and a trust center an outsider can actually read. |
27 of 111 | 24 percent | 29 |
|
Commercial Transparency
Whether a buyer can budget without a sales call. Published pricing graded on completeness, not on the price itself. |
79 of 111 | 71 percent | 14 |
Read the two ends of that table together. Segment coverage and commercial transparency are the axes a vendor writes for its own sales motion, and they are the best documented. Provenance, security posture and exit rights are the axes a buyer needs at renewal, and they are the worst.
The 28 vendors whose sourcing can be checked
28 of 111These are the vendors graded A or B on Data Licensing and Provenance, ordered by that grade and then by how many of the other five decisive axes they also document. This is not a ranking of product quality and it is not a ranking of data quality. It is a ranking of what a buyer can verify before signing, which is the only thing an outside index is in a position to rank. Several are indexed primarily in another category and appear here because they also sell into this one.
| Vendor | Data Licensing & Provenance | Data Privacy Posture | Exit & Data Portability | Segment & Market Coverage | Security Certifications & Trust Center | Commercial Transparency |
|---|---|---|---|---|---|---|
|
Apollo.io
5 of 6 documented
|
A | A | C | B | B | A |
|
Leadfeeder
5 of 6 documented
|
A | A | C | B | A | B |
|
Saleshandy
5 of 6 documented
|
A | B | C | B | B | A |
|
GTM Workspace by ZoomInfo
4 of 6 documented
|
A | A | C | B | B | D |
|
Instantly
4 of 6 documented
|
A | A | D | B | C | A |
|
Bombora
2 of 6 documented
|
A | B | C | C | C | D |
|
Hunter
6 of 6 documented
|
B | A | B | B | B | A |
|
Reply.io
5 of 6 documented
|
B | B | C | B | B | B |
|
Signado
5 of 6 documented
|
B | B | B | A | C | A |
|
WaLead
5 of 6 documented
|
B | B | B | B | D | A |
|
Adapt.io
4 of 6 documented
|
B | B | C | B | C | A |
|
Clay
4 of 6 documented
|
B | C | C | B | B | B |
|
Clodura.AI
4 of 6 documented
|
B | B | C | B | C | A |
|
Cognism
4 of 6 documented
|
B | A | C | B | B | D |
|
LeadPilot
4 of 6 documented
|
B | A | C | B | C | A |
|
Leadspicker
4 of 6 documented
|
B | C | B | B | C | A |
|
Lusha
4 of 6 documented
|
B | A | C | B | A | C |
|
Neuron
4 of 6 documented
|
B | C | B | C | B | B |
|
Säljmotorn
4 of 6 documented
|
B | B | C | B | C | B |
|
Sendr
4 of 6 documented
|
B | C | C | B | B | B |
|
Surfe
4 of 6 documented
|
B | B | C | B | C | B |
|
Vector
4 of 6 documented
|
B | B | C | B | C | B |
|
DM Faster
3 of 6 documented
|
B | C | B | C | C | B |
|
Fuzzy Sequence
3 of 6 documented
|
B | D | C | B | D | A |
|
Kaspr
3 of 6 documented
|
B | B | C | C | D | B |
|
Lead411
3 of 6 documented
|
B | B | C | C | C | B |
|
Trigify
3 of 6 documented
|
B | C | B | C | C | B |
|
Clevenio
2 of 6 documented
|
B | C | C | B | C | D |
Every grade on this page carries a source basis, and on the deciding axis the mix is worth stating plainly: 104 Vendor Published, 7 Third Party Estimated. That means the sourcing picture rests almost entirely on what vendors say about themselves in their own published materials. The index records those as claims and dates them. It does not restate a vendor claim as independent fact, and it does not fill a disclosure gap with charity in either direction.
Read the full methodology →5 questions the published materials will not answer
Where the index found nothing to grade, these are the questions that close the gap. Put them in the evaluation, and get the answers in writing rather than on a call.
How do you class your sources: licensed, contributed, public record, or inferred, and roughly in what proportion?
These four are not the same legally, commercially, or in how long they survive a challenge. A vendor that will not class its sources is asking you to carry a risk it has not priced.
What is the lawful basis for EU records, and does it differ by region?
Contact data assembled without a stated basis is the part of a data contract that ages worst. Ask for it in writing before the pilot, not at renewal.
What is your measured bounce rate on delivered emails, over what period and what sample?
Coverage and match rates are advertised by everyone and measured by almost nobody. Bounce rate on records you actually sent to is the number that cannot be dressed up.
What are our rights to records enriched into our own CRM after termination?
This is the question asked last and felt hardest. Enriched records sit inside your system of record, and some licenses claw them back.
What does your indemnity cover if a source is challenged, and what does it exclude?
An indemnity with a carve out for the exact scenario in question is a marketing asset, not a protection.
Common questions
Where do B2B contact data providers source their data and is it licensed?
Across the 111 data and enrichment vendors in the GTM Tech Index, only 28 publish enough about sourcing to be graded A or B on Data Licensing and Provenance, and 15 publish nothing an outsider can check. Sources fall into four classes that are not legally equivalent: licensed from a named provider, contributed by users under a data sharing arrangement, collected from a public surface, or inferred by a model. Most vendors in this lane describe their coverage and stay silent on which of the four their records come from, so the licensing question usually has to be asked directly and answered in the contract rather than on the website.
Which B2B data providers document how they comply with GDPR for contact data?
41 of the 111 B2B data and enrichment providers in the GTM Tech Index document their GDPR posture at a standard a buyer can check, graded A or B on Data Privacy Posture: the lawful basis claimed for holding contact data, how data subject requests are handled, whether a data processing agreement is available, and whether subprocessors are disclosed. That is 37 percent, and 12 do it in full. 56 mention GDPR without saying how they meet it, and 14 say nothing at all. On this page's shortlist, Apollo.io, Leadfeeder, GTM Workspace by ZoomInfo, Instantly, Hunter, Cognism, LeadPilot and Lusha carry the A. For a contact database the question that matters most is lawful basis, because the people in the file never signed up with the provider, and legitimate interest is a balancing test rather than a blanket permission. Ask for the lawful basis in writing, the process for honoring an erasure request, and whether erasure reaches customers who already exported the record. Nothing here is legal advice.
Which index tracks B2B data and enrichment vendors?
The GTM Tech Index tracks 111 B2B data and enrichment vendors, each graded on the same seventeen capability axes from public artifacts, with a verification date and a source basis on every figure. It is independently maintained, no vendor pays for inclusion or placement, and changes to vendor capability, pricing and compliance posture are logged as they are verified.
What are the best B2B data and enrichment vendors?
The index does not publish a single ranked winner, because the answer changes with what a buyer is buying for. What it does publish is which vendors can be checked. 28 of 111 document where their data comes from at a grade of A or B, and those 28 are listed on this page with their grades across the 6 axes this category is decided on. 1 of the 111 clear all 6 at A or B.
How do you verify a B2B data vendor before buying?
Ask for provenance classed by source type, the lawful basis for EU records, a measured bounce rate on delivered emails with its period and sample, your rights to enriched records after termination, and the exclusions on the indemnity. Those five questions separate vendors that have done the work from vendors that have written the page. 27 of 111 vendors in this lane document the termination question, which makes it the one most worth asking out loud.
What tools can replace Apollo.io for lead generation?
Start with what it is being replaced for, because the answer changes with the reason. Apollo.io itself is graded here at A on provenance and A on pricing, so a replacement has to clear the same bar rather than a lower one. 28 of the 111 data and enrichment vendors in the GTM Tech Index document where their data comes from at A or B, which is the axis most buyers leaving a bundled tool have never been shown, and the shortlist on this page lists them with grades on provenance, privacy posture, exit rights, coverage, security posture and pricing. Of the shortlist, Apollo.io, Saleshandy, Instantly, Hunter, Signado and WaLead publish pricing complete enough to be graded A, and 5 more on the shortlist do, so a like for like budget can be built before a call. Any two of them can be set side by side on the comparison pages, which grade the same axes in the same order.
How often do B2B contact data providers refresh their records?
Every vendor in this lane claims a refresh cadence and almost none of them measures one in public, which is why the index does not grade refresh as an axis: there is nothing published to grade. The number that stands in for it is bounce rate on records actually sent to, over a stated period and sample, and it is the third question on this page's checklist because it is the one a vendor cannot dress up. Ask for the cadence in writing, ask what refresh means in their pipeline, revalidated against a source or re scored by a model, and ask whether records that fail refresh are removed or flagged. 27 of 111 document what happens to enriched records after termination, and a vendor precise about that is usually precise about refresh too.
How do you evaluate the accuracy of a B2B contact data provider?
Accuracy is the claim every vendor makes and the one an outside index cannot grade, because the only test that counts runs on your records after you send to them. What can be checked before signing is disclosure: whether the vendor states its sources by class, its lawful basis for EU records, and a measured bounce rate with its period and sample. 28 of 111 vendors here clear the sourcing question at A or B and 15 publish nothing checkable, and a vendor that will not show where records come from is not in a position to defend how accurate they are. Then run the pilot on your own list, measure bounces and role changes over thirty days, and hold the contract to that number.
The GTM Tech Index is an independent editorial reference. No vendor pays for inclusion, placement, or rating. Grades reflect the public evidence on the verification date and change as vendors publish more. Compliance postures are assessed from published sources and public records; the index is not a law firm and nothing here is legal advice. Vendors who believe a record is wrong are invited to point the index at published documentation through the contact form on any page, and corrections are logged in the change log.