AtData vs Prospeo: Different Tools, Different Jobs
Comparing AtData and Prospeo is like comparing a spell-checker to a search engine. Both deal with email, but they solve completely different problems. G2 lumps email verification, sales intelligence, and fraud prevention into overlapping categories, which is why you're seeing these two tools side by side. Once you understand what each one actually does, the "versus" framing falls apart pretty quickly.
30-Second Verdict
If you need to clean an existing email list, AtData is built for that - verification, fraud scoring, identity resolution. If you need to find and verify new B2B contacts, Prospeo is the tool. They don't compete. AtData maintains the emails you already have; Prospeo discovers the ones you don't.
What Is AtData?
AtData is an email intelligence platform born from the 2021 merger of TowerData (TowerData (founded 2001)) and FreshAddress. It's not a prospecting tool - it's a hygiene, fraud prevention, and identity resolution engine built for enterprise marketing and compliance teams.
The flagship product, SafeToSend, is trusted by 25% of the Fortune 500. AtData processes 100B+ monthly activity signals and appends up to six fields per record: Verification Status, Verification Code, Domain Type, Role Account, Duplicate, and Valid Email. They back this with a 100% deliverability guarantee and a 99.9% accuracy claim.
Real-world results match the promise. AAA Ohio used SafeToSend to cut undeliverable emails from 25% down to 6.5%, boost engagement by 20%, and flag 2,200 spam trap addresses for suppression. Financial services teams integrate AtData into fraud orchestration platforms for better detection rates and fewer false positives. The platform carries a 4.3/5 rating on G2 across 31 reviews, spanning E-commerce Fraud Protection, Email Verification, and Identity Resolution - three categories with nothing to do with outbound sales.
Pricing starts at $100/month, with batch validation at $0.01 per email. For larger deployments bundling identity intelligence and fraud scoring, expect typical enterprise contracts in the $5k-$50k/year range depending on volume. There's a one-time trial of 100 verifications via InstantData.
What Is Prospeo?
Prospeo is a B2B data platform designed for one job: finding and verifying new contacts so sales teams can fill pipeline. It covers 300M+ professional profiles, 143M+ verified emails, and 125M+ verified mobile numbers, all refreshed on a 7-day cycle.
The platform runs 30+ search filters including buyer intent powered by 15,000 Bombora topics, technographics, job changes, headcount growth, and funding signals. Email accuracy hits 98% through a proprietary 5-step verification process with catch-all handling, spam-trap removal, and honeypot filtering. Prospeo runs its own email-finding infrastructure with no reliance on third-party data providers. The Chrome extension has 40,000+ users pulling verified contacts from company websites and professional profiles in one click.
Those numbers translate to real outcomes. Snyk's 50-person AE team cut bounce rates from 35-40% to under 5% and grew AE-sourced pipeline 180% after switching. CRM enrichment returns 50+ data points per contact at a 92% API match rate, with native integrations into Salesforce, HubSpot, Smartlead, Instantly, Lemlist, and Clay. Pricing is self-serve and transparent - roughly $0.01 per email, free tier with 75 emails/month, no contracts, no sales calls required.
You don't need list hygiene - you need new pipeline. Prospeo gives you 300M+ profiles, 98% email accuracy, and 125M+ verified mobiles on a 7-day refresh cycle. Snyk's 50 AEs cut bounce rates to under 5% and grew pipeline 180%.
Stop cleaning old lists. Start building new pipeline at $0.01 per email.
Head-to-Head Comparison
| Feature | AtData | Prospeo |
|---|---|---|
| Primary use case | List hygiene & fraud | B2B prospecting |
| Email finding | No | 143M+ verified |
| Email verification | Yes (SafeToSend) | Yes (5-step, 98%) |
| Mobile numbers | No | 125M+ verified |
| Fraud/risk scoring | Yes | No |
| Identity resolution | Yes | No |
| Intent data | No | 15,000 Bombora topics |
| Data refresh | Not public | 7-day cycle |
| Free tier | 100 verifications (one-time) | 75 emails/month + 100 extension credits |
| Entry pricing | $100/mo | ~$39/mo |
| Enterprise pricing | $5k-$50k/yr | Self-serve, credit-based |
| G2 rating | 4.3/5 (31 reviews) | 4.5/5 |
| CRM integrations | API + partner integrations | Salesforce, HubSpot, 10+ |
Every row reinforces the same point: these tools occupy different columns on the GTM stack spreadsheet.
Key Differences That Matter
Three tiers of email tools. The market breaks into validation ("is this email real?"), intelligence ("who is this person and should I trust them?"), and prospecting ("who should I contact and how do I reach them?"). AtData sits squarely in the intelligence tier - it goes beyond basic SMTP checks to score risk, resolve identities, and flag fraud. Prospeo operates in the prospecting tier, discovering contacts and arming you with 50+ data points to act on. Confuse the tiers and you'll buy the wrong tool.
Buyer profile. AtData sells to enterprise marketing teams, fraud analysts, and compliance officers. Prospeo sells to SDRs, AEs, RevOps teams, and outbound agencies. A sales team evaluating AtData for outbound prospecting will waste weeks on a tool that was never designed for their workflow. We've seen this happen more than once.
Pricing transparency. AtData gates enterprise pricing behind sales conversations - standard for identity intelligence vendors serving Fortune 500 compliance teams. Prospeo publishes everything on its pricing page. You can sign up, run a search, and export contacts in under five minutes without talking to anyone.
Data output depth. SafeToSend returns 6 fields focused on email validity. Prospeo enrichment returns 50+ data points per contact - job title, company revenue, tech stack, intent signals, mobile number. Industry best practice targets hard bounces under 1%. Both tools help you get there, but from opposite directions.
When to Choose Each Tool
When AtData Is the Right Pick
You're cleaning a large existing email database with 100k+ records. Fraud prevention matters - think financial services, e-commerce, payments. You need identity resolution and risk scoring on inbound leads, or marketing deliverability optimization is the priority.
AtData shines when you already have the contacts and need to make sure they're safe, real, and deliverable. It's a maintenance tool, not a growth tool.
When Prospeo Is the Right Pick
You need to find new B2B contacts with verified emails and mobile numbers. You're building outbound prospect lists from scratch. CRM enrichment with 50+ data points matters, intent-based prospecting is part of your workflow, or you want self-serve access without sales calls or annual contracts.
Here's the thing: if your average deal size is under $10k and you don't have a fraud problem, you almost certainly need a prospecting tool, not an identity intelligence platform. Most teams searching this comparison fall into that bucket.
Skip AtData if...
You're an SDR team trying to build pipeline. AtData won't find you a single new contact. It's like buying a car wash when you don't own a car yet.
AtData returns 6 fields per record. Prospeo returns 50+ data points - job title, intent signals, tech stack, mobile number, company revenue - on contacts you didn't have five minutes ago. Self-serve, no contracts, no sales calls.
Find and verify new B2B contacts in under five minutes. Free tier included.
Can You Use Both Together?
Yes, and the cleanest workflow pairs them in a waterfall. Use Prospeo as the primary finder for net-new outbound - discovering contacts, verifying emails, pulling mobile numbers, enriching with intent data. Then run AtData as a hygiene layer on your existing CRM database, catching decayed emails, flagging spam traps, and maintaining deliverability over time.
If you're building this into your ops stack, it helps to treat it like data enrichment plus ongoing B2B data cleansing: one system finds net-new contacts, the other keeps your database healthy.
We've talked to teams running exactly this setup. One RevOps lead at a mid-market SaaS company described it as "Prospeo fills the top of the funnel, AtData keeps the bottom from rotting." That's a pretty accurate summary.
Neither tool replaces the other. When comparing AtData vs Prospeo, the real answer is often "both." Together they cover the full email lifecycle: find, verify, and maintain.
FAQ
Does AtData find new email addresses?
No. AtData verifies and enriches emails you already have. It doesn't discover new contacts or provide mobile numbers. For net-new B2B emails and direct dials, you need a prospecting platform that covers verified emails and mobile numbers at scale.
Is AtData free?
AtData offers a one-time trial of 100 verifications through InstantData. Paid plans start at $100/month. Typical enterprise contracts run $5k-$50k/year depending on volume and bundled modules like fraud scoring or identity resolution.
Can Prospeo verify existing email lists?
Prospeo's 5-step verification runs automatically on every contact you find or enrich. For bulk hygiene on a legacy database with hundreds of thousands of records, a dedicated verification tool like AtData or ZeroBounce handles that specific job well.
What's a good free option for B2B email finding?
Prospeo's free tier gives you 75 emails plus 100 Chrome extension credits per month - enough to test real outbound campaigns. Hunter offers 25 free searches/month but caps enrichment depth. For teams running actual pipeline, Prospeo's free plan delivers more usable data per credit.