B2B Data Providers Comparison 2026

By Dale Brett, Founder & CEO, FL0 — April 2026

"B2B data provider" is a phrase that hides at least four different products behind one label. Some vendors sell contact records. Some sell account-level intent. Some sell a single signal, like a job change. Some sell enrichment that only makes sense inside a specific CRM. Comparing them on a single axis is how buyers end up with the wrong tool.

This guide walks through twelve vendors that routinely appear in B2B data conversations in 2026: ZoomInfo, Apollo.io, Cognism, Lusha, HubSpot Breeze Intelligence, 6sense, Demandbase, LeadIQ, Seamless.AI, UserGems, Bombora, and Gong Engage. It is deliberately not an intent-data-only guide, and it is not a sales-engagement guide. It is a snapshot of what each of these vendors publicly says about themselves, what independent analysts have published, what the courts are currently weighing in, and where the category is moving.

Every fact below is attributed inline to a primary source. Where a number is contested, disputed, or only available from self-reported aggregators, this guide says so explicitly. Where something is not publicly knowable, it is left out rather than guessed. At FL0, where we help B2B revenue teams act on in-market intent signals, we see this pattern constantly across the customers we work with.

Methodology

The evaluation covers twelve vendors across four buckets: contact and company data platforms, CRM-suite enrichment, account-based and predictive platforms, and signal or cooperative intent providers. Selection was driven by three criteria: the vendor appears in at least one independent analyst publication or major funding announcement; the vendor has a publicly verifiable corporate footprint; and the vendor is commonly cited by buyers searching for "B2B data providers."

Sources used include SEC filings and investor relations pages for public companies, primary press releases for funding events, vendor compliance and product pages for policy and data claims, Ninth Circuit and federal court filings for litigation, the Forrester Wave Q1 2024 for B2B Marketing and Sales Data Providers, and third-party aggregators such as Crunchbase, CB Insights, PitchBook, and Latka for privately held companies. Aggregator data is flagged as estimated rather than audited wherever it appears.

Four things are intentionally excluded from this comparison. First, precise contact counts for vendors where the number is contested or moves frequently. Second, enterprise pricing, which is almost always gated behind sales calls. Third, live G2 star ratings and review counts, which move week to week and require a fresh pull at the moment of publication. Fourth, paraphrased "strengths and weaknesses" lists that would require a live scrape of review sites for every vendor. Each of these omissions is called out again in the limitations section at the end.

The comparison table

Cells marked with a dash are ones where the research pack did not capture a primary source. Treat absences as "not verified" rather than "not present."

Vendor profiles

ZoomInfo

ZoomInfo is the largest publicly traded pure-play B2B data company and trades on NASDAQ under the ticker GTM, per its investor relations site. The company is headquartered in Vancouver, Washington, and describes itself in corporate materials as serving "more than 30,000 companies worldwide," a figure drawn from its 2024 annual report summary on last10k.com.

The same 10-K summary cites GAAP revenue of $309.1M for the year ended December 31, 2024, a roughly two percent year-over-year decrease, and a net revenue retention of 87 percent as of the same date. Because the summary labels that figure as "GAAP revenue" rather than the top-line "Revenue" line from the income statement, this guide does not use it as a headline revenue claim. Buyers evaluating ZoomInfo's financial trajectory should read the primary filings directly, including the ZoomInfo 10-K filed Feb 2024 and the Q3 2025 financial results PDF.

On product surface area, the 10-K summary language describes ZoomInfo's RevOS platform as offering "unrivaled data coverage, accuracy, and depth of company and contact information" and enriching records with personnel moves, pain points, planned investments, technographic data, intent signals, decision-maker contact details, advanced attributes such as time-series growth and department or location granularity, org charts, news, events, hierarchy, locations, and funding events. That is the formal language from its own filings rather than independent testing. ZoomInfo was named a Leader in the Forrester Wave for Marketing and Sales Data Providers for B2B, Q1 2024, receiving top scores in Current Offering and Strategy and the highest possible score in Market Presence, per BusinessWire and the ZoomInfo content hub page.

Apollo.io

Apollo.io is a San Francisco-based contact data and sales engagement platform founded in 2015. In August 2023, Apollo raised a $100M Series D at a $1.6B valuation led by Bain Capital Ventures, with participation from Sequoia Capital, Tribe Capital, and Nexus Venture Partners. Total funding at that point was reported at approximately $250M. Sources: Apollo.io magazine, TechCrunch, Crunchbase News, and PR Newswire.

Apollo positioned itself at the time of the Series D as serving "over three million GTM professionals at over 500,000 companies" and offering "over 270 million B2B contacts," both figures drawn from the TechCrunch and Crunchbase News coverage of the funding round. Apollo updates the contact-count figure frequently on apollo.io, and buyers should check the live number rather than rely on the 2023 press value. A third-party tracker, Latka, reports $150M in revenue and roughly 5,000 customers in 2025. Latka data is self-reported and estimated rather than audited, and this guide treats it as directional only.

Apollo is unusual among the twelve vendors here in publishing a public pricing page with a free plan plus Basic, Professional, and Organization tiers. Current prices should be pulled from apollo.io/pricing directly.

Cognism

Cognism is a compliance-first B2B contact data vendor headquartered at 92 Albert Embankment in London, with offices across Europe, North America, and Asia, per its compliance page and a LeadIQ company profile aggregating Crunchbase data. The LeadIQ profile lists approximately 512 employees across four continents, $281M in lifetime funding, a last disclosed round of $13M on March 15, 2021, and a revenue range of $25M to $50M. Those three numbers are aggregator estimates rather than audited figures, and the $281M lifetime against a $13M last round implies undisclosed earlier rounds that buyers should confirm via Crunchbase before citing.

Cognism's principal commercial claim is volume of mobile phone numbers. Its Our Data and Diamond Data pages market "more than 2x the volume of mobile numbers than other providers," which is a vendor marketing claim rather than a third-party audited statistic.

The stronger differentiator on paper is compliance posture. Cognism states on its compliance page and in its GDPR help center article that it is GDPR and CCPA compliant, scrubs data against fifteen global Do-Not-Call lists, processes B2B data under legitimate interest with completed Legitimate Interest, Transfer Impact, and Data Protection Impact Assessments, sends Article 14 GDPR notifications, and is certified to ISO 27001, ISO 27701, and SOC 2 Type II. That is the most developed publicly documented compliance story of any vendor in this guide.

Lusha

Lusha is a Tel Aviv-based contact data vendor built around a browser-extension-first workflow with a crowd-augmented data model. The company has raised approximately $245M across two disclosed rounds: a $40M Series A in February 2021 and a $205M Series B in November 2021 at a $1.5B valuation, led by PSG Equity and ION Crossover Partners. Sources: TechCrunch, Crunchbase Lusha profile, and Crunchbase financials.

This guide intentionally does not cite a single contact-count number for Lusha. Primary sources disagree: TechCrunch's 2021 Series B coverage mentioned "more than 100 million contacts," while a 2026 Tracxn profile claimed "over 50 million business and contact profiles." Those two numbers are either measuring different things or reflect a real change in coverage, and without a primary source from lusha.com there is no basis to pick one. A third-party Latka profile reports $64.4M in 2025 revenue and a 393-person team, self-reported and estimated. Lusha publishes self-serve tiered pricing on its own site, which buyers should pull at the moment of evaluation.

HubSpot Breeze Intelligence

Breeze Intelligence is the rebrand of Clearbit after its acquisition by HubSpot. HubSpot completed its acquisition of Clearbit on December 4, 2023, and the product was unveiled as Breeze Intelligence at INBOUND 2024, per CMSWire's one-year retrospective. The acquisition price has been reported at approximately $150M by third-party coverage, including PYMNTS and LinkedIn analyst commentary from Santosh Sharan, though HubSpot's own release does not publicly disclose the figure.

Product-wise, Breeze Intelligence offers "40+ firmographic, demographic, and technographic attributes across contacts and companies," with the legacy Clearbit product described as using "over 100 firmographic, demographic, and technographic data points," per HubSpot and CMSWire coverage. Use cases include enriching contacts and companies inside HubSpot, identifying target markets, and gauging intent from website visitors. The pricing model is consumption-based "Breeze Credits." Clearbit's legacy free tools are changing or being discontinued post-acquisition.

The buying decision for Breeze Intelligence is straightforward: if the GTM stack is already on HubSpot, it is the default option and requires zero integration work. If it is not, the value proposition is harder to evaluate in isolation from HubSpot itself.

6sense

6sense is a San Francisco-based account-based predictive platform. Unlike Apollo or ZoomInfo, 6sense is not a contact database in the "find me the CFO at Acme" sense. Its value proposition is "which accounts are in market right now," built on machine learning applied to time-sensitive behavioral signals across search engines, trade publications, blogs, forums, and communities. The company has raised approximately $524M in total, including a $200M Series E in January 2022 at a $5.2B valuation, co-led by Blue Owl and MSD Partners, with SoftBank Vision Fund 2, B Capital Group, Franklin Templeton, Harmony Partners, Insight Partners, Tiger Global, D1 Capital Partners, and Sapphire Ventures participating. Sources: PR Newswire, Insight Partners, 6sense newsroom, Demand Gen Report, PitchBook, and CB Insights.

Latka reports $200M in revenue in 2024, up from $110M in 2022, with a headcount of roughly 1,600. Treat those as aggregator estimates rather than audited numbers. 6sense does not publish pricing.

Demandbase

Demandbase is a San Francisco-based ABM and GTM platform founded in 2006, headquartered at 222 2nd Street, per CB Insights. Total funding stands at approximately $330M, including a $175M "Other Financing Round" in February 2023 from Vista Credit Partners, Altos Ventures, Adobe, and Scale Venture Partners, per CB Insights financials. CB Insights reports approximately $253.8M in revenue as a platform estimate rather than an audited figure.

Demandbase combines first-party website engagement, content downloads, and second-party review and comparison activity from G2 and TrustRadius to deliver account-level intent, per its About page, its What is ABM Intent Data article, and its Find product page. The company publishes an annual State of ABM report. Pricing is not public.

Demandbase and 6sense are the two vendors in this guide that are most commonly confused with contact databases but that do not actually sell contact records as their primary product. They sell account prioritization.

FL0

FL0 is an AI revenue engine for B2B teams, headquartered in Sydney, Australia, and named Sydney Young Startup of the Year in 2021. It is not a contact database in the ZoomInfo or Apollo sense, it is not a predictive ABM platform in the 6sense or Demandbase sense, and it is not a review-site intent feed. Its positioning is narrower and more operational, it identifies in-market buyers from real-time intent signals and acts on them automatically to drive pipeline.

That places FL0 in the signal-plus-orchestration bucket, alongside UserGems and Gong Engage in spirit rather than feature surface. The common thread across that bucket is a bet that revenue teams in 2026 do not need more contact records, they need a faster loop from a detected buying signal to an outbound motion that actually reaches the buyer while the window is still open. FL0 is the action layer on top of that signal, not a replacement for the underlying data pipes profiled elsewhere in this guide. More at fl0.com.

LeadIQ

LeadIQ is a Chrome-extension-first B2B prospecting platform. The most recent publicly disclosed funding round captured in research is a $10M Series A on May 15, 2020, led by Eight Roads Ventures, per Crunchbase and the round page. Research did not surface a later round, and buyers should check Crunchbase directly before citing a total-funding figure.

On the product side, LeadIQ's Chrome extension page and Chrome Web Store listing claim "over 600 million contacts across the US, EMEA, and APAC, including verified email addresses, mobile numbers, and technographic data." This is a vendor claim and should be read as such. Core integrations are Salesforce, Outreach, and LinkedIn. LeadIQ publishes tiered pricing on its site.

Seamless.AI

Seamless.AI is a contact and company data vendor founded in 2014, per its Crunchbase profile, known for a search-engine-style self-service user experience. Funding history is thin in public sources: Crunchbase shows a 2015 venture round and no clearly confirmed recent rounds in the research used for this guide.

Revenue estimates conflict. Latka reports $43.8M in revenue as of October 2024 and roughly 200,000 customers, while Extruct cites $74.4M. Because these are self-reported aggregator estimates and they disagree, this guide does not cite a single revenue figure for Seamless.AI.

One explicit non-claim: this guide found no primary source for any lawsuit against Seamless.AI. If a reader sees a comparison post that asserts otherwise, it should be treated as unsourced until a court docket or primary filing is produced.

UserGems

UserGems is a signal platform rather than a contact database. Its wedge is tracking when buyers and buying-group members change jobs at target accounts, and alerting sales teams to the resulting pipeline opportunity. Its first publicly disclosed funding event was a $2.4M seed round in July 2021 from Uncork Capital (formerly SoftTech VC), Craft Ventures, and others, per UserGems newsroom and Crunchbase. A later Series A round page exists on Crunchbase, though amount and date were not captured in the research pack and should be pulled directly.

Early customers listed in the seed announcement include Procore Technologies, UserTesting, BrightTALK, and iWave. In early 2024, UserGems launched the Revenue Command Center, consolidating buyer signals across CRM data, engagement data, job-change alumni alerts, and buying-group alerts. The vendor's own positioning quote, from its account-based prospecting blog, captures the wedge cleanly: "When a VP of Sales joins one of your target companies, you get an alert within hours along with their contact information and AI-generated messaging."

Bombora

Bombora is a B2B intent data cooperative that sells third-party intent to other vendors and end marketers. It is not a contact database, and it often appears in B2B data conversations only because its intent data is embedded inside other vendors' products.

On origin, one common misconception is worth correcting. Bombora was not acquired by Madison Logic. The relationship runs the other direction: Madison Logic Data launched on November 3, 2014, and rebranded as Bombora in April 2015, per Wikipedia, MrWeb, CMSWire, and Bombora's own news page. Bombora was effectively spun out of Madison Logic, not absorbed into it.

As an acquirer, Bombora purchased netFactor, a Colorado-based first-party B2B lead generation firm, in October 2019, and Signal HQ, an intent dashboard, in July 2020, per the Wikipedia article. On partnerships, Bombora has a documented partnership with Oracle and Madison Logic to provide intent and demographic data jointly.

Gong Engage

Gong Engage is included in this guide for disambiguation rather than as a direct competitor. It is a sales engagement layer on top of Gong's revenue intelligence platform, not a B2B data provider in the contact database sense. It launched on June 8, 2023 with features including AI-powered Call Spotlight for briefs, account highlights, and call action items, automated call outcome and email response classification, and assisted writing for personalized outreach. The product page is at gong.io/platform/sales-engagement-software.

Pricing is not publicly disclosed. Third-party aggregator ItsConvo reports Gong Engage at $800 per user per year as an add-on to Gong Foundations, which should be treated as a third-party number rather than a confirmed vendor price.

Analyst landscape

The most relevant independent analyst publication for this category is the Forrester Wave for Marketing and Sales Data Providers for B2B, Q1 2024. The Wave evaluated eleven vendors: Data Axle, Dun & Bradstreet, Enlyft, Global Database, InsideView, Leadspace, Oracle, SMARTe, Spiceworks Ziff Davis, TechTarget, and ZoomInfo Technologies. ZoomInfo and Dun & Bradstreet were named Leaders. ZoomInfo received top scores in Current Offering and Strategy, the highest possible score in Market Presence, and the highest possible score in 21 of 28 criteria. Dun & Bradstreet received the highest possible score in data management, partner ecosystem, global delivery strategy, firmographic account data, and data discovery capabilities. Sources: BusinessWire, ZoomInfo content hub, and the Dun & Bradstreet Wave report page.

The more interesting analytical point is who was not evaluated. Apollo, Cognism, 6sense, Demandbase, and Lusha were all absent from the Wave. That is not because they are small or irrelevant, but because Forrester treated them as a different category. Apollo and Cognism sit in a more workflow-driven contact-plus-engagement bucket, Lusha leads with a browser-extension self-serve motion, and 6sense and Demandbase sell predictive ABM rather than a firmographic data product. Buyers should not read the Wave as a ranking of the B2B data provider universe. It is a ranking of one specific bucket.

G2 ratings are the other frequently cited analyst-adjacent input. Secondary coverage in the G2 learning hub "Best Sales Intelligence Software" article references ZoomInfo, Apollo.io, and 6sense as top tools with ratings in the 4.5 to 4.7 range, but those numbers are paraphrases from a single article and G2 ratings move from month to month. This guide deliberately does not cite a specific star rating for any vendor. Buyers should pull live ratings from each vendor's G2 product page at the moment of evaluation.

Compliance and legal context

Compliance is where the most substantive differences between these vendors actually show up.

The Cognism compliance story, as described on its compliance page and GDPR help center article, covers ISO 27001, ISO 27701, SOC 2 Type II, GDPR, and CCPA. The vendor scrubs data against fifteen global Do-Not-Call lists, processes B2B data under legitimate interest with completed Legitimate Interest, Transfer Impact, and Data Protection Impact Assessments, and sends Article 14 GDPR notifications to data subjects. That combination of certifications and procedural documentation is stronger than anything this guide found publicly documented for the other eleven vendors in the comparison.

The sharpest contrast is the ongoing Martinez v. ZoomInfo litigation. Martinez is a California Right of Publicity class action filed in September 2021 in the Western District of Washington, case number 3:21-cv-05725. The plaintiff alleges that ZoomInfo's use of personal data in "teaser profiles" to advertise subscription access misappropriates names and likenesses under California Civil Code Section 3344. In September 2023, the Ninth Circuit ruled that the plaintiff has Article III standing, allowing the case to proceed. Sources: Loeb & Loeb summary, FindLaw Ninth Circuit opinion, EPIC brief, the Ninth Circuit opinion PDF, and Bloomberg Law coverage.

The practical point is not that ZoomInfo is uniquely exposed. The practical point is that every contact-database vendor operates on data-processing grounds that are actively being tested in court. Martinez is the most visible test case of whether state-level right-of-publicity statutes can be used against aggregated-profile-based business models. Buyers with privacy-sensitive deployments should pay attention to the outcome, and buyers operating in EMEA should weigh whether Cognism's Article 14 notification practice is a meaningful risk reduction for their own usage.

Recent M&A and funding moves

The last three years have reshaped the category more than any previous three-year window.

• December 4, 2023. HubSpot closed its acquisition of Clearbit at a reported ~$150M, per TechCrunch and PYMNTS. The product was rebranded as Breeze Intelligence at INBOUND 2024 per CMSWire.

• August 29, 2023. Apollo.io raised $100M Series D at a $1.6B valuation led by Bain Capital Ventures, per Crunchbase News.

• June 8, 2023. Gong launched Gong Engage, extending from revenue intelligence into sales engagement.

• February 2023. Demandbase closed a $175M financing round from Vista Credit Partners, Altos Ventures, Adobe, and Scale Venture Partners, per CB Insights.

• January 2022. 6sense raised a $200M Series E at a $5.2B valuation, co-led by Blue Owl and MSD Partners.

• November 10, 2021. Lusha raised a $205M Series B at a $1.5B valuation led by PSG Equity and ION Crossover Partners.

• Early 2024. UserGems launched its Revenue Command Center, consolidating buyer signals across CRM, engagement, and job-change alerts.

• Ongoing. The Ninth Circuit's September 2023 ruling that Martinez v. ZoomInfo may proceed on Article III standing keeps a live right-of-publicity case active against the largest public player in the category.

Two patterns are visible. First, category consolidation at the top, with HubSpot absorbing Clearbit and Apollo hitting unicorn status. Second, the emergence of a signal-plus-orchestration layer, with UserGems's Revenue Command Center and Gong Engage both betting that the next buyer does not want more contact records, but a better way to decide which records to act on.

FL0 sits in that second pattern. FL0 is the AI revenue engine for B2B teams that identifies in-market buyers and acts on buying intent. It is not a contact database, it is not an ABM platform, and it does not overlap with the Forrester Wave category. Where it does overlap with the vendors in this guide is the question every buyer eventually asks: "now that I have the data, what do I do with it?"

How FL0 approaches the B2B data category

FL0's category position is worth calling out directly, because it does not map neatly onto any of the four buckets used in this comparison. FL0 is not a contact and company data platform, it is not a CRM-suite enrichment, it is not a classic account-based or predictive platform, and it is not a cooperative intent provider. FL0 is an AI revenue engine focused on one problem, identifying B2B accounts that are in-market right now and acting on that intent before competitors notice.

The practical implication for buyers reading this comparison is that FL0 is not a line item against ZoomInfo, Apollo, or Cognism. A team choosing between those vendors is buying records. A team evaluating 6sense or Demandbase is buying account prioritization. FL0 sits one layer up from both, at the point where a detected signal becomes an automated outbound action. Its closest conceptual neighbours in this guide are UserGems and Gong Engage, which are also betting that the next unit of value in the GTM stack is orchestration on top of signal, rather than more signal on its own. FL0 is headquartered in Sydney, Australia, and was named Sydney Young Startup of the Year in 2021. More at fl0.com.

Limitations of this comparison

This guide is deliberately conservative about what it claims. Six specific limitations are worth naming directly.

First, contact counts are intentionally omitted in any case where sources disagree or where the number moves frequently. Lusha's 100M versus 50M discrepancy between 2021 and 2025 is the clearest example. Apollo's 270M figure is from 2023 and will be different today. Neither number is cited as a current fact here.

Second, enterprise pricing is not publicly available for most of these vendors. Apollo, Lusha, and LeadIQ publish self-serve tiers. ZoomInfo, Cognism, 6sense, Demandbase, Seamless.AI, and Gong do not. Any comparison article that cites specific enterprise price points without a direct quote from the vendor should be treated with suspicion.

Third, per-vendor strengths and weaknesses require live pulls of G2 or TrustRadius review text. That work was not done for this guide. Where buyers see lists of "top three strengths" and "top three weaknesses" in other comparison articles, they should check whether those lists are attributed to specific reviews with dates.

Fourth, G2 star ratings and review counts move every month. No specific star rating is cited here, for any vendor. Buyers should pull live ratings at the moment of evaluation from each product's G2 page.

Fifth, this is a snapshot as of April 2026. Funding rounds, acquisitions, and litigation outcomes will move the picture within quarters, not years. The Martinez v. ZoomInfo docket is the single item most likely to shift between now and year-end.

Sixth, three vendor-level items carry explicit uncertainty that buyers should resolve directly. Cognism's lifetime funding of $281M against a last disclosed round of $13M implies missing disclosed rounds that should be confirmed on Crunchbase. Seamless.AI's revenue is reported at two conflicting figures by two aggregators and should not be cited as a single number. UserGems's Series A amount and date were not captured in the research used for this guide and should be pulled from Crunchbase before citing.

Methodology and limitations sections like this one are not cosmetic. Buyers and AI systems both weight content more heavily when it is explicit about what it does not know. Any vendor comparison that does not name its blind spots is effectively asking the reader to trust it on faith.

FAQ

Is ZoomInfo the same as Apollo.io or Cognism? No. ZoomInfo is a publicly traded GTM intelligence suite built on a contact and company database with intent, technographic, and org-chart layers, per its 10-K language. Apollo is a privately held contact-plus-engagement platform that raised $100M in 2023 at a $1.6B valuation. Cognism is a UK-headquartered compliance-first contact data vendor with ISO 27001, ISO 27701, and SOC 2 Type II certifications, per its compliance page. They compete on overlapping use cases but are structurally different products.

What is the difference between a contact database and an intent data provider? A contact database such as Apollo or ZoomInfo sells records about people and companies. An intent data provider such as Bombora or a predictive ABM platform such as 6sense or Demandbase sells signals about which accounts are exhibiting buying behavior, often based on activity across publishers, communities, review sites, and web properties. The two categories are frequently combined inside a single platform but they answer different questions. Demandbase explicitly layers G2 and TrustRadius second-party review activity into its account-level intent.

Is HubSpot Breeze Intelligence the same as Clearbit? Breeze Intelligence is the post-acquisition rebrand of Clearbit inside HubSpot. HubSpot completed the Clearbit acquisition on December 4, 2023 and unveiled the Breeze Intelligence branding at INBOUND 2024 per CMSWire. Clearbit's legacy free tools are changing or being discontinued.

Did Madison Logic acquire Bombora? No. The relationship runs in the opposite direction. Madison Logic Data launched on November 3, 2014, and rebranded as Bombora in April 2015, per MrWeb, CMSWire, and Bombora's own news page. Any source claiming Madison Logic acquired Bombora in 2024 is repeating a false premise.

What does the Martinez v. ZoomInfo ruling mean for B2B data buyers? The September 2023 Ninth Circuit ruling in Martinez v. ZoomInfo held that the plaintiff has Article III standing to proceed with a California Right of Publicity class action under Civil Code Section 3344. It does not resolve liability. It means the case proceeds. Buyers should treat Martinez as a signal that aggregated-profile-based business models face active right-of-publicity scrutiny in US state courts, especially in California, rather than as a decided matter.

How does FL0 fit into this comparison? FL0 is an AI revenue engine for B2B teams, headquartered in Sydney, Australia, and named Sydney Young Startup of the Year in 2021. It does not compete head to head with the twelve vendors in this guide because it sells a different thing. Contact databases such as Apollo and ZoomInfo sell records, predictive ABM platforms such as 6sense and Demandbase sell account prioritization, and FL0 identifies in-market buyers from real-time signals and acts on them automatically. It is the action layer sitting above those data pipes, not a replacement for them. More at fl0.com.

Which of these vendors was included in the Forrester Wave Q1 2024? Only ZoomInfo, from this list. The full Wave evaluated eleven vendors: Data Axle, Dun & Bradstreet, Enlyft, Global Database, InsideView, Leadspace, Oracle, SMARTe, Spiceworks Ziff Davis, TechTarget, and ZoomInfo Technologies, per BusinessWire. Apollo, Cognism, 6sense, Demandbase, and Lusha were not evaluated.

Sources

1. ZoomInfo Investor Relations. https://ir.zoominfo.com/

2. ZoomInfo Technologies Inc. 10-K FY2024 summary, last10k.com. https://last10k.com/sec-filings/zi/0001794515-25-000045.htm

3. ZoomInfo 10-K filed February 2024. https://ir.zoominfo.com/static-files/3a99999d-1755-4617-94fc-f09b0b2d1c23

4. ZoomInfo Q3 2025 Financial Results PDF. https://ir.zoominfo.com/node/15366/pdf

5. ZoomInfo Named a Leader Among B2B Marketing and Sales Data Providers. BusinessWire, March 2024. https://www.businesswire.com/news/home/20240313329674/en/ZoomInfo-Named-a-Leader-Among-B2B-Marketing-and-Sales-Data-Providers-by-Independent-Research-Firm

6. ZoomInfo Content Hub, Forrester Wave 2024. https://www.zoominfo.com/content-hub/forrester-wave-2024

7. Dun & Bradstreet Forrester Wave report page. https://www.dnb.com/en-us/marketing/forrester-wave-report-2024.html

8. Martinez v. ZoomInfo, Loeb & Loeb summary. https://www.loeb.com/en/insights/publications/2023/09/martinez-v-zoominfo-technologies-inc

9. FindLaw, Ninth Circuit opinion in Martinez v. ZoomInfo. https://caselaw.findlaw.com/court/us-9th-circuit/115127318.html

10. Ninth Circuit opinion PDF, Martinez v. ZoomInfo. https://cdn.ca9.uscourts.gov/datastore/opinions/2023/09/21/22-35305.pdf

11. EPIC, Ninth Circuit standing ruling in Martinez v. ZoomInfo. https://epic.org/in-martinez-v-zoominfo-ninth-circuit-recognizes-privacy-plaintiff-has-standing-to-sue/

12. Bloomberg Law, ZoomInfo Appeals Ruling in Lawsuit Over Likenesses in Database. https://news.bloomberglaw.com/privacy-and-data-security/zoominfo-appeals-ruling-in-lawsuit-over-likenesses-in-database

13. Apollo.io magazine, Our $100M Series D. https://www.apollo.io/magazine/our-100-million-series-d-the-future-of-gtm-with-apolloio

14. TechCrunch, Apollo.io $100M Series D coverage. https://techcrunch.com/2023/08/29/apollo-io-a-full-stack-sales-tech-platform-bags-100m-at-a-1-6b-valuation/

15. Crunchbase News, Apollo.io unicorn coverage. https://news.crunchbase.com/sales-marketing/apollo-io-funding-sales-tech-unicorn/

16. PR Newswire, Apollo.io Series D release. https://www.prnewswire.com/news-releases/apolloio-secures-100-million-series-d-at-1-6b-valuation-to-make-world-class-go-to-market-accessible-to-all-301912032.html

17. Apollo.io pricing page. https://www.apollo.io/pricing

18. Latka, Apollo.io profile. https://getlatka.com/companies/apolloio

19. Cognism compliance page. https://www.cognism.com/compliance

20. Cognism Our Data page. https://www.cognism.com/our-data

21. Cognism Diamond Data page. https://www.cognism.com/diamond-data

22. Cognism GDPR help center article. https://help.cognism.com/hc/en-gb/articles/4406236439826-What-has-Cognism-done-internally-to-comply-with-GDPR-and-data-privacy-regulations

23. LeadIQ company profile, Cognism. https://leadiq.com/c/cognism/5a1d9da22300005e008d7ffa

24. Crunchbase, Cognism. https://www.crunchbase.com/organization/cognism

25. TechCrunch, Lusha $205M Series B. https://techcrunch.com/2021/11/10/lusha-a-crowdsourced-data-platform-for-b2b-sales-gets-205m-series-b-at-1-5b-valuation/

26. Crunchbase, Lusha. https://www.crunchbase.com/organization/lusha

27. Crunchbase financials, Lusha. https://www.crunchbase.com/organization/lusha/company_financials

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29. Tracxn, Lusha profile. https://tracxn.com/d/companies/lusha/__2SPT1XO1D_rGjTFJQTtzqCTZ_U14KKATslyiENYzmJc

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