Adapt.io vs DiscoverOrg: The Comparison That No Longer Makes Sense
You're comparing a product that exists to one that was discontinued in 2019. DiscoverOrg acquired ZoomInfo, took its name, and vanished as a standalone brand. The real comparison you need is Adapt.io vs ZoomInfo - and the gap between those two is wider than most people realize.
DiscoverOrg Is Gone. Here's What Happened.
DiscoverOrg acquired ZoomInfo in February 2019 and rebranded the combined company as ZoomInfo that September. At the time, the combined entity served 13,500 customers on roughly $350M in annualized recurring revenue. DiscoverOrg's human research team, org chart data, and intent signals all got folded into ZoomInfo's platform.
TrustRadius now labels DiscoverOrg as "discontinued" and redirects users to ZoomInfo. So if you're still searching for this matchup in 2026, you're really asking about Adapt.io vs ZoomInfo. Let's get into that.
30-Second Verdict
Choose Adapt.io if you're a small team spending under $200/mo who needs basic B2B contact data and can tolerate credit limits.
Choose ZoomInfo if you're enterprise with a $30K+ annual budget and need a full GTM platform - intent data, org charts, workflow automation.
Skip both if verified email accuracy matters more than platform breadth. Prospeo delivers 98% email accuracy at ~$0.01/lead with a 7-day data refresh cycle, self-serve onboarding, and no annual commitments.
Adapt.io caps your credits. ZoomInfo locks you into $15K+ contracts. Prospeo gives you 300M+ profiles with 98% email accuracy at ~$0.01/lead - no annual commitments, no credit walls, and a 7-day data refresh that's 6x faster than the industry average.
Stop paying enterprise prices for data you still have to verify.
Adapt.io vs ZoomInfo - The Real Comparison
| Feature | Adapt.io | ZoomInfo (ex-DiscoverOrg) |
|---|---|---|
| G2 Rating | 4.6/5 (2,789 reviews) | 4.5/5 (9,036 reviews) |
| Database | 250M+ contacts | 260M-320M+ contacts |
| Data Refresh | 5M+ records/day | Continuous (300+ researchers) |
| Starting Price | $0/mo (free tier) | ~$14,995/yr |
| Contract | Monthly or annual | Annual contract |
| Free Tier | Yes (25 emails/day) | No |
| Intent Data | No | Yes (add-on) |
| Chrome Extension | Yes | Yes |
| Key Integrations | Salesforce, Outlook + others | Salesforce, HubSpot, Outreach + others |
Adapt.io at a Glance
Adapt.io's strength is accessibility. A free tier with 25 email credits per day, paid plans starting at $49/mo (Starter) and $99/mo (Basic), and no annual lock-in make it one of the lowest-friction ways to start pulling B2B contact data. The 250M+ contact database covers decent ground, and 5M+ records refreshed daily keeps things reasonably current.
In our testing, the free tier runs dry within a single prospecting session. Twenty-five credits disappears fast when you're building a targeted list. The G2 rating sits at 4.6/5 across nearly 2,800 reviews, with users praising transparent pricing and easy onboarding - but credit limitations are the recurring complaint. Multiple reviewers flag incorrect email addresses and bounced contacts, and the 16-month average time to ROI (per G2) is surprisingly long for a data tool.
Here's the thing: Adapt.io is a fine starter tool, but the credit walls mean you'll outgrow it the moment outbound becomes a real channel and not a side experiment.
ZoomInfo: DiscoverOrg's Successor
ZoomInfo is the market incumbent. The database runs 260M-320M+ contacts, and the platform extends well beyond data into intent signals, workflow automation, and conversation intelligence. It absorbed DiscoverOrg's research team along with NeverBounce (email validation) and Datanyze (technographics), so you're getting a platform shaped by multiple acquisitions and a lot of consolidation.
The depth is real: strong intent data, deep integrations with every major CRM and sequencer, and solid prospecting workflows. The price tag is equally real. Professional starts around $15,000/year and climbs fast - most teams pay $30K-$75K+ annually. Additional users often run ~$1,500-$2,500 per user/year depending on tier, and credits cost $0.20-$0.60 each at volume with overages hitting $0.50-$1.50/credit.
Vendr benchmarks put the numbers in sharper focus: teams of ~200 employees typically pay $24,800-$44,200/year, while companies over 1,000 employees pay $83,200-$161,900. Auto-renewal and a ~60-day cancellation window are a common complaint theme.
And despite the massive database, G2 reviewers consistently flag outdated contacts and wrong job titles. We've seen teams verify ZoomInfo data with a second tool before launching sequences - which defeats the purpose of paying premium prices for what's supposed to be the gold standard.
What Users Actually Say
The #1 complaint about ZoomInfo on r/sales? It's gone "very upmarket." One popular thread frames it bluntly: $15K/year starting, and that's before add-ons. The consensus is that ZoomInfo's database is strong but the pricing has outpaced what most SMB and mid-market teams can justify.
Adapt.io gets praised for ease of use and quick access to contacts, but the credit walls frustrate users consistently. G2 reviews mention "limited credits" and "restricted access to emails" as top complaints. Several reviewers report incorrect email addresses that tanked their outbound deliverability.
Both tools share the same fundamental problem: users flag stale data for ZoomInfo and bad emails for Adapt.io. If your outbound depends on email accuracy, neither platform fully solves the problem without a verification layer on top.
Which Tool Should You Pick?
For small teams with tight budgets, Adapt.io makes sense as a starting point. Accept the credit limits, verify emails before sending, and plan to graduate to something bigger once outbound becomes a core motion.
For enterprise orgs that need intent data, org charts, and deep CRM integrations, ZoomInfo is the obvious pick - but negotiate hard. Discounts of 30-65% are standard, and you should never pay list price.
If verified email accuracy is your actual priority, skip both. Prospeo covers 300M+ professional profiles with 125M+ verified mobile numbers that hit a 30% pickup rate across all regions. Its proprietary email-finding infrastructure doesn't rely on third-party providers, which is why teams like Snyk saw bounce rates drop from 35-40% to under 5% after switching. At ~$0.01/lead with no contracts, it eliminates both Adapt.io's credit walls and ZoomInfo's enterprise pricing.
Both Adapt.io and ZoomInfo users flag the same problem: stale data and bounced emails. Prospeo's proprietary email infrastructure and 5-step verification eliminated that for Snyk - dropping bounce rates from 35-40% to under 5% across 50 AEs.
75 free emails/month. No credit card. See the accuracy difference yourself.
FAQ
Is DiscoverOrg still available?
No. DiscoverOrg acquired ZoomInfo in 2019 and rebranded the combined company under the ZoomInfo name. It doesn't exist as a standalone product anymore - TrustRadius lists it as discontinued. Any Adapt.io vs DiscoverOrg comparison is effectively a comparison with ZoomInfo.
What's the cheapest way to get B2B contact data?
Adapt.io offers a free tier with 25 email credits/day and paid plans from $49/mo. Prospeo's free tier gives 75 verified emails/month with real-time verification included. ZoomInfo starts around $15,000/year with no free plan. Apollo's free tier is another option worth testing alongside these.
Is Adapt.io accurate enough for cold outreach?
Adapt.io holds a 4.6/5 G2 rating, but recurring complaints mention incorrect emails and bounced contacts. If deliverability is critical, pair it with a verification tool or use a platform with built-in verification - Prospeo runs a 5-step process including catch-all handling and spam-trap removal to hit 98% accuracy, which saves you from needing a separate verification step entirely.