A $35,000 annual invoice for a contact database is a tough sell when your sales team fits around a single lunch table. If you've been quoted that kind of number — or worse, already signed and regretted it — you're not alone.
I've spent most of my career in SaaS and automation, and one pattern keeps showing up: small and mid-sized sales teams get sold enterprise tools they don't fully use. is a good example of a tool built for a different kind of team. ZoomInfo is a good product for large organizations that need firmographic filters, intent data, org charts, and a massive North American contact database. But when you're a 1–5 person team trying to fill a pipeline, paying for a tool with features you'll never touch feels like renting a warehouse to store a bicycle.
The B2B sales intelligence market has matured — G2 now lists in the category — and there are capable, affordable alternatives that match specific workflows instead of forcing you into a one-size-fits-all platform. This guide breaks down six of them, with honest pricing, real-world accuracy expectations, and a use-case matching framework so you pick the right tool on the first try.
Why Sales Teams Are Looking for a ZoomInfo Alternative in 2026

The reasons teams look elsewhere tend to cluster around the same handful of pain points:
Cost and contract structure. ZoomInfo doesn't publish pricing, but Vendr reports that contracts are typically multi-seat annual commitments with . Third-party 2026 estimates consistently put entry-level ZoomInfo around $15K/year and more complete packages in the $25K–$40K+ range. Forum anecdotes show buyers reporting negotiated contracts anywhere from $7.5K to $60K+, depending on seats, credits, and add-ons. Even at the low end, that's a significant line item for a lean team.
Paying for features you don't use. ZoomInfo bundles intent data, Copilot modules, Chorus, org charts, and enrichment workflows. These are valuable at enterprise scale. For a five-person sales team doing outbound email and cold calls, most of those modules sit idle.
Data accuracy frustrations. G2's user sentiment summary for ZoomInfo includes common complaints about . This isn't unique to ZoomInfo — B2B data decays at roughly depending on the field — but it stings more when you're paying premium prices.
Complexity and onboarding drag. Larger platforms require admin setup, CRM hygiene rules, credit management, and sometimes procurement approval. Tools like , Hunter, or Lusha can produce useful output in an afternoon.
To be fair, ZoomInfo does well when a company needs enterprise-scale account intelligence, broad North American coverage, and deep CRM integrations. The point isn't that ZoomInfo is bad. It's that many smaller teams are buying a bigger machine than they need — and . Adding procurement friction and onboarding drag to the mix only makes that worse.
What to Look for in a ZoomInfo Alternative
Before jumping into the tools, it helps to know what criteria actually matter. I've organized the evaluation around seven dimensions — the same ones that come up most often in user forums and reviews.

Pricing Transparency
Can you see actual prices before talking to sales? Tools like Apollo, Hunter, Thunderbit, and Lusha publish at least some pricing. ZoomInfo and Cognism remain mostly "contact us." For budget-conscious teams, transparent pricing isn't just convenient — it's a trust signal.
Email and Phone Number Accuracy
No B2B data tool delivers 100% accuracy. In my experience, email accuracy across tools tends to land in the 60–80% range before verification, and phone/direct dial coverage is even more volatile — roughly 40–70% depending on the segment and provider. I'll cover why in a dedicated section below.
Data Coverage: US vs. International
Some tools are heavily US-centric. Others, like Cognism, specialize in EU/EMEA markets. If your prospects are global, this matters a lot.
CRM Integration Depth
How well does the tool connect with Salesforce, HubSpot, or whatever CRM your team already uses? A tool that doesn't plug into your existing workflow creates more manual work, not less.
Ease of Setup for Small Teams
Can a single rep get started in an afternoon, or does it require IT involvement and a two-week onboarding? For lean teams, time-to-value is everything.
Best Use Case Fit
This is the big one. Each tool excels at a specific job: cold calling, email enrichment, niche prospecting, or multi-source waterfall enrichment. Competing articles tend to treat all alternatives as interchangeable. They're not.
Which ZoomInfo Alternative Fits Your Team? A Use-Case Matching Guide
Before I walk through each tool in detail, here's a quick decision framework. If you know your primary need, you can jump straight to the right section.

| Your Primary Need | Best Pick(s) | Why |
|---|---|---|
| Direct-dial mobile numbers for cold calls | Lusha, Cognism | Highest mobile coverage per user reports |
| Bulk email enrichment for outbound sequences | Apollo.io, Hunter.io | Large email databases, CRM-native workflows |
| Multi-source data enrichment (waterfall) | Clay | Aggregates 150+ data providers in one workflow |
| Scraping contacts from niche sites/directories | Thunderbit | AI extracts structured data from any webpage |
| EU/GDPR-compliant prospecting | Cognism | GDPR-verified mobile data, EU headquarters |
| Budget under $100/mo for a small team | Apollo.io (free tier), Thunderbit (free tier) | Both offer functional free plans |
No single tool replaces ZoomInfo for every use case. The smart move is matching the tool to the job — and many teams end up using two or three together.
1. Thunderbit: The "Scrape Your Own Leads" ZoomInfo Alternative
is a fundamentally different kind of ZoomInfo alternative. Instead of paying for access to a pre-compiled contact database, you extract contacts — emails, phone numbers, company info — directly from the websites where those contacts actually live.
I say this as someone who helped build Thunderbit: the idea came from watching sales teams cobble together three or four tools just to build a prospect list from a niche directory or conference site. The data they needed was right there on the page. They just didn't have an easy way to pull it into a spreadsheet.
How It Works
The workflow is about as simple as it gets:
- Install the .
- Navigate to any website — a LinkedIn company page, an industry directory, a conference sponsor list, an event attendee page, a niche vendor site.
- Click AI Suggest Fields. Thunderbit's AI reads the page and proposes a table structure (company name, email, phone, location, etc.) so you don't have to set up columns manually.
- Click Scrape.
- Export to Google Sheets, Excel, Airtable, Notion, or your CRM — .
The real power shows up with Subpage Scraping: Thunderbit can visit each detail page linked from a directory listing and enrich your table with additional fields — bios, emails, addresses, specialties — automatically. If you're scraping a trade association directory, for example, it'll pull the member list, then visit each member's profile page to grab the deeper details.
When Scraping Beats a Database (and When It Doesn't)
The scraping approach wins when:
- Your prospects live on niche websites that generic databases miss — trade association directories, local business listings, conference speaker pages, franchise lists, app marketplaces, government registries.
- You're prospecting in non-US markets where big databases have thin coverage.
- You need always-fresh data. Because Thunderbit pulls from live webpages, the information is as current as the source itself — no waiting for a vendor's quarterly database refresh.
A database approach is better when:
- You need high-volume outbound with firmographic filters (industry, revenue, headcount).
- You rely on intent data or account scoring.
- You want to search 200M+ contacts by job title and seniority without knowing which website to visit.
Key Features for Sales Teams
- AI Suggest Fields auto-structures output — no manual column setup
- Scheduled Scraper for recurring prospecting (e.g., monitor a job board weekly for hiring signals)
- Cloud Scraping for speed (50 pages at a time) vs. Browser Scraping for login-required sites
- Free email extractor and phone number extractor for quick one-off lookups
- Export to Google Sheets, Excel, Airtable, Notion —
Thunderbit Pricing
- Free tier: , credit-based paid plans (1 credit = 1 output row)
- Paid plans start around
- No annual contract lock-in
- Check current details at
Compare that to ZoomInfo's $15K–$50K+ annual commitment.

Thunderbit Pros and Cons
| Pros | Cons |
|---|---|
| Real-time data (always as fresh as the source) | Not a pre-built database — you need to identify source websites |
| Works on any website, not just major platforms | No built-in intent data or firmographic filters |
| Easiest setup (2 clicks to start scraping) | Best suited for teams that know where their prospects live online |
| Free exports to Sheets, Excel, Airtable, Notion | |
| No maintenance or stale-data risk |
A Real-World Example
Say you're selling cybersecurity services to mid-market SaaS companies. You find a SaaS conference sponsor page with 200 companies listed. With Thunderbit, you scrape the sponsor list, then use Subpage Scraping to visit each sponsor's detail page and pull company name, website, booth/session info, and public contact emails. Total time: maybe 10 minutes. Total cost: a handful of credits. Try doing that with a $35K database subscription.
For more on how Thunderbit handles , or to see it in action, check out our .
2. Apollo.io: The Budget-Friendly Database + Engagement Platform
is the closest direct replacement for ZoomInfo in this list. It combines a large B2B database — Apollo publicly claims depending on the page — with built-in sales engagement tools like email sequences, a call dialer, and a Chrome extension for LinkedIn prospecting.
Apollo stands out for budget-conscious teams because of its free tier. While the exact credit allotment has shifted over the years (and Apollo's own 2026 pricing article now shows roughly on the free plan rather than the often-cited 10K), it's still enough to get started without spending a dime.
Key Features
- Large contact database with firmographic, technographic, and behavioral data
- Built-in email sequences and call dialer (on higher tiers)
- Chrome extension for prospecting on LinkedIn
- CRM integrations: Salesforce, HubSpot, Pipedrive, Zoho
- AI-powered lead scoring that ranks prospects against your ICP
Apollo.io Pricing
| Plan | Price (Annual Billing) | Credits/Year |
|---|---|---|
| Free | $0 | ~900 credits/year |
| Basic | $49/user/month | 30,000/year |
| Professional | $79/user/month | 48,000/year |
| Organization | $119/user/month (3-user min) | 72,000/year |
One note: Apollo's .
Apollo.io Pros and Cons
| Pros | Cons |
|---|---|
| Most functional free tier among database alternatives | Phone number accuracy is frequently described as "hit or miss" in forums |
| Good email database for outbound | UI has a learning curve for advanced features |
| Built-in engagement tools (sequences, dialer) | Credit allotments have changed over time, creating budgeting confusion |
| Transparent, published pricing | Data quality not as deep as ZoomInfo for enterprise accounts |
Best for: Budget-conscious teams that want a database and outreach tools in one platform.
3. Lusha: The Quick-Setup ZoomInfo Alternative for Direct Dials
is built for speed. If you're a sales rep who lives on LinkedIn and company websites and needs direct-dial phone numbers fast, Lusha gets you there in minutes — not days.
The Chrome extension works on LinkedIn profiles and company pages, revealing contact info with a click. Lusha's credit system charges differently depending on what you reveal: . Previously revealed contacts cost 0 credits to view again, which is a nice touch.
Key Features
- Chrome extension for instant contact lookups on LinkedIn and company sites
- Prospect list builder with email and phone data
- Six CRM integrations (Salesforce, HubSpot, Outreach, etc.)
- 7-step data verification process
- Intention-based data for identifying accounts showing buying signals
Lusha Pricing
| Plan | Price |
|---|---|
| Free | ~50 credits/month |
| Starter/Pro/Premium | ~$37–$59/user/month (varies by billing and region) |
| Scale | Custom |
from free through Scale.
Lusha Pros and Cons
| Pros | Cons |
|---|---|
| Fastest time-to-value of any tool on this list | Credit consumption rises quickly for phone-heavy prospecting |
| Strong mobile number coverage | Less robust search filters compared to ZoomInfo |
| Simple, intuitive interface | Advanced features locked behind higher tiers |
| Affordable for small teams | GDPR compliance has faced regulatory scrutiny (Italian Garante opened an investigation in 2025; probe still ongoing as of late 2025) |
Best for: Reps who need quick direct-dial lookups from LinkedIn without a heavy platform rollout.
4. Cognism: The GDPR-Compliant ZoomInfo Alternative for European Markets
is the tool to reach for when your sales motion is Europe/EMEA-heavy, phone-led, or compliance-sensitive. With 200M+ European contacts and a strong GDPR compliance posture, it fills a gap that US-centric databases often leave wide open.
The standout feature is Diamond Data® — phone-verified mobile numbers that Cognism claims can . An independent study of 1,000 mobile contacts found that Cognism-verified numbers had a . That's a meaningful difference for cold-calling teams.
Key Features
- AI-powered Sales Companion with ChatGPT-style search prompts
- DNC list checking across
- Integrations with HubSpot, Salesforce, Salesloft, Outreach
- Bombora-powered intent data
- 95% of director-level and above contacts refreshed every 30 days
Cognism Pricing
Cognism doesn't publish self-serve pricing. Third-party estimates commonly put platform access at $15K+/year, with two package tiers (Grow and Elevate). Elevate/Diamond adds phone-verified data and premium features. Treat these figures as directional — you'll need a custom quote.
Cognism Pros and Cons
| Pros | Cons |
|---|---|
| Best European data coverage among alternatives | No free tier or public self-serve pricing |
| Strongest GDPR compliance posture | Premium pricing — not ideal for very small teams |
| Phone-verified mobile numbers (Diamond Data) | More geared toward mid-market and enterprise |
| Intent data included |
Best for: Teams selling into EU/EMEA markets or running phone-led outbound where verified mobile numbers and DNC checking are non-negotiable.
5. Hunter.io: The Email-Focused ZoomInfo Alternative
is the specialist pick. If your primary need is finding and verifying business email addresses — not building a full-stack sales intelligence platform — Hunter does that one job extremely well.
Enter a company domain, and Hunter returns all associated email addresses it finds by crawling public sources. Verify emails before sending, build cold email campaigns with scheduling and tracking, or use the Google Sheets add-on for bulk verification.
Key Features
- Domain Search: Find all emails associated with a company domain
- Email Finder: Locate a specific person's business email
- Email Verifier: Reduce bounce rates before outreach
- Cold email campaign builder with scheduling and tracking
- Google Sheets add-on for bulk verification
- API for developers
Hunter.io Pricing
| Plan | Price (Annual Billing) | Credits |
|---|---|---|
| Free | $0 | 50 credits/month, 500 recipients/sequence |
| Starter | $34/month | More credits, additional features |
| Growth | $104/month | Higher volume |
| Scale | $209/month | Highest self-serve tier |
| Enterprise | Custom | Custom |
Hunter lets you — no annual lock-in required. That's a refreshing contrast to ZoomInfo's multi-year contracts.
Hunter.io Pros and Cons
| Pros | Cons |
|---|---|
| Excellent email accuracy and verification | Email-only — no phone numbers |
| Transparent, published pricing | No intent data or firmographic filters |
| Simple, focused tool that does one thing well | Limited for teams that need a full prospecting platform |
| Free tier available | Domain-based discovery can miss hidden decision-makers |
| No annual lock-in |
Best for: Teams running email-only outreach who need reliable email discovery and verification without the overhead of a full platform. Pairs well with Thunderbit (for scraping additional contact details) or Lusha/Cognism (for phone numbers).
6. Clay: The Waterfall Enrichment ZoomInfo Alternative (The Forum Favorite)
is the power pick that user forums love but competing articles almost universally ignore. It represents a fundamentally different approach to data enrichment: instead of relying on one database, Clay routes each lookup through multiple providers in sequence — a process called waterfall enrichment — until it finds the data.
Think of it like this: if Apollo doesn't have the email, Clay tries Hunter. If Hunter doesn't have it, Clay tries Clearbit. Then Lusha. Then another provider. Clay's data marketplace includes , and the waterfall logic means you maximize coverage while controlling cost.
The trade-off is complexity. Clay is more of a data workflow builder than a plug-and-play lookup tool — beloved by RevOps teams and GTM engineers, but potentially overkill for a solo rep who just wants to find a phone number.
Key Features
- Waterfall enrichment across 150+ data providers
- Salesforce and HubSpot integrations (reps can click a button and refresh contact data)
- AI-powered data enrichment and formatting (Claygent)
- Workflow builder for custom prospecting sequences
- Credit-based pricing for data lookups
Clay Pricing
Clay's pricing changed materially in 2026. The now separates Actions (workflow steps) from Data Credits (provider lookups):
| Plan | Price | Data Credits/Month | Actions/Month |
|---|---|---|---|
| Free | $0 | 100 | 500 |
| Launch | ~$185/month | 2,500 | 15,000 |
| Growth | ~$495/month | 6,000 | 40,000 |
| Enterprise | Custom | Custom | Custom |
Note: older articles may still cite Starter/Explorer/Pro at $149/$349/$800. Clay's own confirms the changes.
Clay Pros and Cons
| Pros | Cons |
|---|---|
| Highest data coverage through multi-source waterfall | Steeper learning curve than simpler tools |
| Extremely flexible workflows | Credit and action costs add up with heavy usage |
| Strong CRM connectors | Overkill for simple email lookups |
| Beloved by RevOps teams | Requires someone who owns GTM ops |
Best for: RevOps teams and GTM engineers who need maximum data coverage and are comfortable building enrichment workflows. Not the right pick for a solo rep who just wants to find an email address.
ZoomInfo Alternatives Comparison Table: All 6 Tools Side by Side
I've tried to be specific rather than vague below — real price ranges and honest accuracy expectations instead of marketing superlatives.
| Tool | Free Tier | Starting Paid Price | Email Accuracy (Realistic) | Phone Data | US vs. Intl Coverage | CRM Integrations | Best Use Case | Ease of Setup |
|---|---|---|---|---|---|---|---|---|
| Thunderbit | 6 pages (10 w/ trial) | ~$9/mo yearly | Fresh as source page | Extracts public phones from pages | Any website; strong for niche/non-US | Exports to Sheets/Excel/Airtable/Notion; API | Scrape live leads from directories/events/sites | Very easy |
| Apollo.io | ~75 credits/mo | $49/user/mo annual | 60–80% before verification | Available but mixed user reports | Broad US/global database | Salesforce, HubSpot, Pipedrive, Zoho | Budget all-in-one database + engagement | Moderate |
| Lusha | ~50 credits/mo | ~$37–$59/user/mo | Good for lookup; confidence scoring | Strong quick direct-dial lookup | US + global | Salesforce, HubSpot, Outreach, more | Fast LinkedIn/company direct-dial prospecting | Easy |
| Cognism | None | ~$15K+/year (custom) | Strong for verified/EMEA | Diamond Data phone-verified mobiles | EMEA/EU + North America | HubSpot, Salesforce, Salesloft, Outreach | GDPR-sensitive EU and phone-led teams | Moderate |
| Hunter.io | 50 credits/mo | $34/mo annual | Strong email finding/verification | Not a phone tool | Domain/public email discovery globally | Sheets, API, CRM tools | Email-only discovery + verification | Very easy |
| Clay | 100 data credits + 500 actions/mo | ~$185/mo (Launch) | Depends on providers in waterfall | Depends on providers selected | Global via provider marketplace | CRM enrichment, HTTP API, webhooks | Waterfall enrichment + custom RevOps workflows | Harder |
Budget is everything? Thunderbit and Apollo have the most functional free tiers. Phone numbers are critical? Lusha and Cognism lead. Need maximum data coverage and have someone to build workflows? Clay is hard to beat.
2026 Pricing Reality Check: What These ZoomInfo Alternatives Actually Cost

Pricing is the #1 reason teams leave ZoomInfo, so let's put real numbers on the table.
| Tool | Free Tier | Starting Paid Plan | Enterprise / Notes |
|---|---|---|---|
| ZoomInfo | None | ~$15K/year (estimated entry) | $25K–$40K+ with add-ons; multi-year contracts common |
| Thunderbit | 6 pages free (10 w/ trial) | ~$9/mo yearly (credit-based) | No annual contract lock-in |
| Apollo.io | ~75 credits/mo | $49/user/mo annual | Volume discounts at scale |
| Lusha | ~50 credits/mo | ~$37–$59/user/mo | Per-credit phone lookups |
| Cognism | No free tier | ~$15K+/year (custom) | Premium mobile data |
| Hunter.io | 50 credits/mo | $34/mo annual | Email-only, no phone |
| Clay | 100 data credits + 500 actions/mo | ~$185/mo (Launch) | Waterfall credits extra |
Some quick math: a team of three reps on Apollo Basic would pay about $1,764/year. The same team on Thunderbit's starter plan might spend under $500/year for light scraping. ZoomInfo? Even a heavily negotiated contract rarely drops below $7,500–$13,000.
Can You Negotiate ZoomInfo's Price?
Yes. that ZoomInfo commonly negotiates based on volume, multi-year terms, and timing. Forum anecdotes show buyers pushing initial quotes of $30K+ down to $9K–$15K. A few negotiation tips:
- Push back on multi-year terms — ask for a one-year contract with a renewal option.
- Negotiate seat flexibility and credit rollover.
- Ask for capped annual increases (ZoomInfo contracts often include ).
- Time your negotiation near quarter-end.
- Use quotes from Apollo, Cognism, or Clay as leverage.
Even with negotiation, though, ZoomInfo's floor is significantly higher than any alternative on this list.
Setting Honest Data Accuracy Expectations (No Tool Is Perfect)

No B2B data tool delivers 100% accuracy. Full stop.
I want to be blunt about this, because overpromising on data accuracy is one of the fastest ways to lose a buyer's trust — and I've seen too many articles do exactly that. Not ZoomInfo. Not Apollo. Not any tool on this list. People change jobs, companies reorganize, email addresses get retired, and phone numbers move. Apollo's own data-decay explainer cites a range of depending on the field, with a commonly cited monthly deterioration of about 2.1%.
Here's what realistic accuracy looks like across the category:
| Data Type | Realistic Accuracy Range | Why It Varies |
|---|---|---|
| Email addresses | 60–80% before verification | Job changes, domain changes, inbox retirement |
| Mobile/direct dials | 40–70% | Number portability, turnover, limited public sources |
| Company firmographics | Generally higher | Less volatile than individual contact data |
How Thunderbit approaches this differently: Because Thunderbit scrapes data in real time from live webpages, the information is as fresh as the source itself. If a company's "About Us" page lists current team members, that's what you get — not a database record from six months ago. The trade-off is that Thunderbit only knows what's on the page. If a contact's email isn't publicly listed, it won't appear.
How Clay approaches this differently: Clay's waterfall enrichment queries multiple providers in sequence, which can improve coverage. But it requires workflow design, and the best practice is to waterfall only qualified leads — not every scraped row — to control cost.
The bottom line: always verify emails before sending outbound sequences, regardless of which tool you use. Treat any vendor-reported accuracy claim as methodology-dependent, not a guarantee.
Which ZoomInfo Alternative Should You Pick?
Here's how I'd match each tool to a real scenario:
-
Niche prospecting on a budget: Thunderbit. Scrape contacts from the specific websites your prospects live on — directories, event pages, association sites — without a database subscription. Start with the and see what you can pull in an afternoon.
-
High-volume outbound with email sequences: Apollo.io. Biggest database at the lowest price, with built-in engagement tools. The free plan is enough to test the workflow before committing.
-
Cold calling with mobile numbers: Lusha (simple setup, fast lookups) or Cognism (verified numbers + EU coverage). If you're calling into Europe, Cognism is worth the premium.
-
Email-only outreach: Hunter.io. Focused, accurate, affordable, and no annual lock-in. Pair it with Thunderbit or Lusha if you eventually need phone numbers.
-
Maximum data coverage across sources: Clay. Waterfall enrichment for teams that need every possible data point and have someone to build the workflows.
-
EU/GDPR-sensitive markets: Cognism. Purpose-built for European compliance with DNC checking across 15 territories.
Many teams end up using two or three tools together. Thunderbit for niche scraping + Apollo for bulk outbound is a combination I've seen work well. Hunter for email verification + Lusha for phone numbers is another common pairing. The monolithic-platform era is winding down.
If you want to see what modern lead extraction looks like without a five-figure annual contract, give a spin. You might be surprised how much pipeline you can build from the websites you already visit every day.
FAQs
1. What is the cheapest alternative to ZoomInfo?
Apollo.io's free tier and Thunderbit's free tier are the most functional no-cost options. For paid plans, Hunter.io starts at $34/month with no annual commitment, and Thunderbit's starter plan runs around $9/month billed yearly.
2. Is ZoomInfo worth it for small teams?
For most teams under five reps, ZoomInfo's $15K+ annual cost is hard to justify. Alternatives like Apollo, Lusha, Hunter, or Thunderbit deliver sufficient data for pipeline building at a fraction of the price. ZoomInfo makes more sense when you need enterprise-scale firmographic filters, intent data, and deep CRM integrations.
3. Can you negotiate ZoomInfo's price?
Yes — buyers regularly report negotiating ZoomInfo contracts from list price ($30K+) down to $9K–$15K. Tactics that work: push back on multi-year terms, ask for seat flexibility and credit rollover, request capped annual increases, and use competing quotes from Apollo, Cognism, or Clay as leverage.
4. Which ZoomInfo alternative has the best phone numbers?
Cognism (Diamond Data® phone-verified numbers) and Lusha are most frequently praised for mobile number quality. Cognism's independent study showed a 45% correct-person pickup rate for verified numbers vs. 18% for standard mobile data.
5. How does web scraping compare to a contact database for lead generation?
Databases are faster for high-volume, filtered prospecting across millions of contacts. Scraping tools like Thunderbit are better for niche sources, international markets, and always-fresh data from live webpages. Many teams combine both approaches — using Thunderbit to build targeted lists from specific websites and Apollo or Hunter to enrich or verify the contacts.
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