78% Mobile Numbers. Zero Landlines. Zero Gatekeepers.

Built for outbound agencies who know the difference between activity and results.

"ZoomInfo gave us mostly landlines. Apollo was the same shit. Certo actually delivers mobile numbers that connect."

Jascha Görres
Founder, WE:MARQ

"78% mobile hit rate vs 23% with our old provider. Our reps went from frustrated to profitable in two weeks."

Philipp Angermann
Founder, FounderStack

Why your conversion rates suck: you're calling landlines instead of mobiles

❌ Other providers flood you with landlines and dead numbers
ZoomInfo, Apollo, and the rest give you mostly landlines that go straight to gatekeepers. You waste time and money calling numbers that will never convert.
✅ We give you mobile numbers that actually connect
78% mobile numbers means your reps talk to decision-makers, not their assistants. Every number is verified and active before you pay for it.
78%
Mobile Numbers Instead of Landlines
Skip gatekeepers and reach decision-makers who actually pick up their phones.
3x
Higher Pick-Up Rates
Mobile numbers connect 3x more often than landlines because you're calling the right person directly.
50%
Less Time Wasted on Dead Calls
No more "he's in a meeting" or endless voicemail. Your reps have real conversations from day one.

Workflow

How it works

Simple: we find mobile numbers, not landlines. Your reps call decision-makers directly, skip the gatekeepers, and actually have conversations.
1. Upload your list
Bring your own data from LinkedIn, CSV, CRM, or connect via API for seamless integration.
2. We enrich with verified mobiles
Submit a lead, and our system returns the verified mobile number within seconds.
3. Export and start calling
"Download your enriched list, sync directly to your workflow, or pull data via API in real-time.
"Apollo's data was 70% landlines, ZoomInfo wasn't much better. With Certo, our connection rates went from 12% to 35% because we're finally calling mobile numbers. Their API made integration seamless - no more manual uploads."
Jascha Görres
Founder of WE:MARQ

FAQs

Frequently Asked Questions

Working with superscale is changing how founders, builders and marketing experts think about scaling and viral product growth
How do you get up to 78% mobile numbers when ZoomInfo and Apollo can't?

Most data providers scrape public directories and LinkedIn, which are full of office landlines. We use a different approach - we identify decision-makers first, then find their actual mobile numbers through multiple proprietary sources. While others give you whatever number they find, we specifically hunt for mobile numbers because we know that's what converts.

What makes your mobile data different from other providers?

Simple: we don't sell you landlines and call them "phone numbers." Other providers give you a mix of landlines, dead numbers, and maybe some mobiles. We focus specifically on mobile numbers because mobile = decision-maker picks up directly. No gatekeepers, no "he's in a meeting," just real conversations with people who can actually buy.

How fresh is your mobile data?

We verify every mobile number in real-time when you request it. The moment you search for a contact, we check if their number is still active and connected. Unlike providers who sell you stale data from months ago, you get fresh verification on every single lookup because we know outbound agencies can't afford to waste calls on dead numbers.

Can I test the data quality before paying for credits?

Absolutely. Every new client gets 50 free mobile lookups to test our data quality with their own target accounts. Upload your prospect list, get their mobile numbers, and see the difference yourself. Most agencies know within the first 20 calls whether our data is better than what they're currently using.

What's your pricing compared to ZoomInfo and Apollo?

You only pay for valid mobile numbers that actually connect. Other providers charge you for landlines, dead numbers, and disconnected phones - then you waste time and money calling numbers that don't work. We only charge when we deliver a verified mobile number. Most agencies cut their data costs in half because they stop paying for numbers that never convert.

Transparent pricing

Pay Only for Mobile Numbers That Actually Connect

Stop wasting money on landlines and dead numbers. Our transparent pricing means you only pay when we deliver verified mobile numbers.

Starter

For small agencies testing mobile-first outbound

€79 / month

per month, per user
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
1250 emails
1 email found = 1 credit
or
125 phones
1 phone found = 10 credit

what’s included:

  • 500 verified mobile numbers included
  • API access included
  • CSV import & export
  • Real-time mobile verification
Get started free

Pro

For lean teams testing outbound.
Most Popular

€149 / month

per month, per user
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
3000 emails
1 email found = 1 credit
or
125 phones
1 phone found = 10 credit

what’s included:

  • 1,500 verified mobile numbers included
  • API access included
  • Priority enrichment speed
  • Dedicated support
Get started free

Enterprise

For lean teams testing outbound.

€799 / month

per month, per user
Custom credits / month
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
1250 emails
1 email found = 1 credit
or
125 phones
1 phone found = 10 credit

what’s included:

  • Unlimited verified mobile requests
  • Advanced API access
  • Dedicated account manager
  • SLA & compliance package
Talk to Sales

REVIEWS

What Outbound Agencies Say About Mobile-First Data

Real results from agencies who switched from landlines to mobile numbers and started reaching decision-makers directly.
“We cut out three other tools and run Certo as the single source of truth. It’s the first time I trust the data I’m giving my team.”
Jorge Perez Garcia
Position, Company name
“We finally have a list our reps don’t complain about. Calls connect, emails land, pipeline grows.”
Flavio Mancinone
Position, Company name
“Getting mobiles that connect changes the whole math. Calls, follow-ups, even LinkedIn works better when the data isn’t junk.”
Liza Hillermann
Position, Company name
“Certo gave us direct dials we couldn’t get anywhere else. Within a week our reps were on the phone with real decision makers instead of chasing dead leads.”
Philipp Angermann
Position, Company name
“With Certo we stopped wasting time on bounced emails and dead numbers. Our reps now open their day with dials that actually pick up.”
Safira Ramolathlan
Position, Company name
“I’ve run sales ops for years and every provider overpromised. Certo is the first one that delivered. Clean, fast, reliable.”
Nick Burrage
Position, Company name

Make Selling Easier

If we can’t find contact data,
no one else can.

Prospecting doesn’t have to be hard. We made it easy for your team.
100 credits free
No credit card
GDPR & CCPA aligned
Get 100 credits free
By focusing on verified mobile numbers, we give sales teams the one asset that truly matters: direct, reliable access to decision-makers.
Victor de Mite
Affluent digital.