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B2B Lead-Gen Stack — Apollo & ZoomInfo Alternative for SDR Teams

Reading Time: 5 minutes

A complete B2B sales-intelligence stack — discovery, enrichment, contact finding, email validation, and tech-stack qualification — assembled from 5 pay-per-result actors. Total monthly cost typically $10-150 vs $1,000-15,000/seat for Apollo Pro, ZoomInfo Pro, or Clearbit Reveal.

The lead-gen tooling market consolidated into three categories: (1) massive contact databases like Apollo and ZoomInfo, where you pay per seat for access to ~250M-300M pre-scraped contacts; (2) enrichment APIs like Clearbit and Datanyze, where you pay per lookup but bundled with a SaaS platform fee; (3) scraping-as-a-service like Bright Data and Octoparse, which sell raw infrastructure but leave the workflow to you. None of these fit a small or mid-sized B2B team running 500-5,000 leads/month — too expensive at the seat tier, too generic at the scraper tier.

NexGenData’s lead-gen actors are a fourth model: composable per-result pricing. Each actor does one specific job well, billed per record returned, and outputs to JSON/CSV with overlapping keys for clean joining. Compose them into the exact pipeline your sales process needs.

The 5-actor stack

StageActorInputOutput
1. DiscoveryB2B Leads Finder + Hiring Signal DetectorICP keyword / geo / industryCompany list with domains
2. EnrichmentLead List EnricherCompany name or domainFirmographics + tech stack + size
3. Contact discoveryCompany Email Finder + Contact Info ScraperDomain + role hintsVerified exec emails + phones
4. Email validationBulk Email ValidatorEmail address listDeliverability + risk per email
5. Tech-stack qualificationTech Stack DetectorDomainTechnologies in use

Why this beats Apollo, ZoomInfo, Clearbit for SDR teams under 10 seats

FeatureNexGenData stackApollo ProZoomInfo ProClearbit / Breeze
Cost — solo SDR (500 leads/mo)$10-15$147/seat$1,500+/seat$999+/mo
Cost — 3-person team (5K leads/mo)$80-150$441/mo (3 seats)$4,500+/mo$999-2,500/mo
Contact database (pre-scraped)No (you scrape on demand)250M+ contacts300M+ contacts~120M contacts
Compose-your-own pipelineYes — actor chainingLimited (workflows)Yes (workflows)API integrations
Output formatsJSON / CSV / ExcelCSV export per queryCSV + APIAPI + webhook
API accessApify actor API (standard)Apollo API on enterprise tierAPI on Pro+Native API
GDPR / CAN-SPAM compliant outputsYes — B2B-only dataYesYesYes
Email deliverability validationYes — included in stackYes — bundledYes — bundledYes
Free tier?Yes (Apify free credits)50 credits/mo freeNoNo

The standard outbound pipeline

Most B2B outbound workflows reduce to the same 5-step pipeline. Here’s the NexGenData stack mapped to each step:

Step 1 — Discovery (find companies matching your ICP)

Input: ICP definition (industry, geography, company size). Output: company-name list with domains.

Step 2 — Enrichment (company name to firmographic profile)

Input: company name list. Output: domain + tech stack + employee count + industry + location.

Step 3 — Contact discovery (find the decision-makers)

Input: domain + role hints. Output: exec/director names + verified emails + LinkedIn URLs.

Step 4 — Email validation (filter deliverable from bounce)

Input: email-address list. Output: status (valid / invalid / unknown) + risk flags per email.

Step 5 — Qualification (filter to ICP-fit accounts)

Input: domain. Output: detected technologies, qualifying signals for your ICP.

Cost worked example: 3-person SDR team, 5,000 enriched leads/month

StepVolumeActor + rateCost
Discovery (B2B Leads Finder)5,000 companies$0.005/result$25.00
Enrichment (Lead List Enricher)5,000 records$0.005/result$25.00
Contact discovery (Email Finder)5,000 contacts$0.010/result$50.00
Email validation5,000 emails$0.001/check$5.00
Tech-stack qualification5,000 sites$0.005/site$25.00
Total monthly cost$130
Equivalent Apollo Pro stack$147/seat × 3$441
Equivalent ZoomInfo Pro$1,500+/seat × 3$4,500+

When to use this stack vs Apollo/ZoomInfo

Use NexGenData’s lead-gen stack if: you’re an early-stage company under 10 SDRs; you want full control over the schema and pipeline; you target a non-standard ICP that Apollo’s pre-built database doesn’t cover well (e.g., very-small businesses, international markets, niche industries); or you need raw JSON/CSV exports for custom ML / scoring pipelines.

Use Apollo or ZoomInfo if: you have a large outbound team (15+ SDRs); you need email sequencing + dialer + CRM in one tool; you target the U.S. tech market where Apollo’s contact coverage is densest; or your team is non-technical and doesn’t want to manage an actor-chaining pipeline.

Frequently asked questions

How does this stack compare to Apollo, ZoomInfo, or Clearbit?

Apollo charges $49-149/month per seat for unlimited contacts within their database (~250M people). ZoomInfo is $14K+/year per seat with deeper firmographics. Clearbit (acquired by HubSpot, now Breeze Intelligence) is $99-999/month for enrichment + reveal. The NexGenData lead-gen stack charges per record returned — typically $5-50/month for a small team — and gives you raw control over the input/output schema. The trade-off: you don’t get Apollo’s massive contact database out of the box, but you can build any contact dataset you want by composing the actors.

Which actor do I start with?

Depends on your input. If you have **company names**, start with the Lead List Enricher to get domains + tech stack + employee count. If you have **domains**, run the Company Enrichment Tool to get firmographics + then Company Email Finder for the exec contacts. If you have **a target market or geography**, run the Hiring Signal Detector or B2B Leads Finder to discover companies first.

Can I run all of these together as a pipeline?

Yes — the actors are designed to chain. The standard B2B outbound pipeline is: (1) Discovery (B2B Leads Finder or Hiring Signal Detector) → (2) Domain enrichment (Lead List Enricher) → (3) Contact discovery (Company Email Finder or Contact Info Scraper) → (4) Email validation (Bulk Email Validator) → (5) Tech-stack qualification (Wappalyzer Replacement). All five actors output JSON/CSV with overlapping keys for clean joins.

How fresh is the data?

Most actors run on-demand against live sources, so freshness is whatever the source publishes. Company Enrichment runs against the target’s live website + WHOIS + DNS — that’s same-day fresh. Hiring Signal Detector pulls live job postings — usually within hours of posting. Lead List Enricher uses domain fingerprinting + search APIs that refresh daily.

What’s the typical monthly cost?

A solo SDR running ~500 enriched leads/month spends ~$10-15 total across the stack. A 3-person sales team running ~5,000 leads/month spends ~$80-150 total. That replaces Apollo Pro at $147+/seat, ZoomInfo Pro at $1,500+/seat, and Clearbit Reveal at $999/month. Cost-per-paying-customer (downstream conversion math) is typically 95%+ better than enterprise platforms.

What about GDPR / CCPA compliance?

All sources scraped are publicly-available business contact information (corporate domains, professional emails, public-facing employee directories). For consumer email validation or contact-discovery on private individuals, you need explicit consent — these actors are not the right tool for that. For B2B outreach, U.S. CAN-SPAM and most EU implementations of GDPR allow legitimate-interest cold outbound provided you include opt-out + identification — same standard Apollo/Outreach/Salesloft require.

Can I bring my own contact list and just enrich it?

Yes. Lead List Enricher accepts a CSV of company names or domains and returns enriched rows. Bulk Email Validator accepts an array of email addresses and returns deliverability + risk scoring per email. Company Email Finder accepts a domain + role hints (CEO, VP Engineering, etc.) and returns matching contacts.


NexGenData publishes 260+ buyer-intent actors covering sales intelligence, SEC filings, lead generation, news + press releases, and competitive intelligence — all pay-per-result. Browse the full catalog →