DiscoverOrg vs Apollo.io: What Actually Changed in 2026
DiscoverOrg doesn't exist anymore. If you're comparing DiscoverOrg vs Apollo.io in 2026, here's what you missed: DiscoverOrg acquired ZoomInfo on February 4, 2019 for $735M, and by September that year the merged brand was marketed as "ZoomInfo Powered by DiscoverOrg." TrustRadius lists DiscoverOrg as discontinued. You can't buy it.
So the real question is ZoomInfo vs Apollo.io. That's a very different comparison - and one we've spent a lot of time testing ourselves.
The Comparison That Actually Matters: ZoomInfo vs Apollo.io
The legacy DiscoverOrg database - human-verified contacts updated every 90 days by roughly 300 researchers - got folded into ZoomInfo's broader data engine. Here's where things stand now:
| Feature | ZoomInfo | Apollo.io | Winner |
|---|---|---|---|
| Contacts | 500M+ verified | 275M+ | ZoomInfo |
| Companies | 110M+ | 70M+ | ZoomInfo |
| Search filters | 300+ | 65+ | ZoomInfo |
| Intent data | Proprietary (210M IP-to-Org) | Third-party Bombora (weekly) | ZoomInfo |
| Built-in sequences | Engage (add-on) | Native, included | Apollo |
| G2 rating | 4.5/5 (9,036 reviews) | 4.7/5 (9,512 reviews) | Apollo |
| Entry price | $15k+/yr | Free | Apollo |
ZoomInfo is still the deepest US B2B database. But most teams paying $30k+ for it are using maybe 20% of the platform. If your average deal size sits below $15k, you almost certainly don't need ZoomInfo-level data - and you definitely don't need the contract headaches that come with it.
30-Second Verdict
- Enterprise teams with $15k+ budgets and intent data needs: ZoomInfo
- Startups and SMBs wanting built-in sequences on a budget: Apollo
ZoomInfo: The Enterprise Default
ZoomInfo runs 500M+ professional profiles with 174M verified emails and 70M direct dials. Its intent engine tracks 210M IP-to-Org pairings and 6T keyword-to-device pairings, giving account-based selling teams buying signals Apollo can't match.
The tradeoffs are real, though. Reddit users on r/sales call the UI "clunky," and one user put it bluntly: "way too expensive for a one-person shop." ZoomInfo markets 95%+ accuracy, but G2 reviewers regularly cite outdated contacts as a top complaint. We've seen teams pay $40k+ and still need a data enrichment layer on top.
The contract situation deserves its own warning. Annual-only billing, auto-renewals with 60-90 day cancellation windows, and renewals that typically climb 10-20%. Add extra credits at around $3,000 per 5,000, NeverBounce verification at another $3,000, and Global Data at $9,995, and teams routinely land close to $50,000/year.
ZoomInfo charges $40k+ and still needs a verification layer. Apollo hits 65% accuracy and risks your domain. Prospeo delivers 98% email accuracy on a 7-day refresh cycle - at roughly $0.01 per email. No annual contracts, no auto-renewals, no stacking tools.
Stop paying enterprise prices for data that still bounces.
Apollo.io: Best Value if You Accept the Data Risk
Apollo's built-in sequence builder is genuinely good - it's the main reason teams pick it over ZoomInfo for outbound. The 275M+ contact database with 65+ filters gets reps moving fast, and the free tier lets you validate the tool before spending anything.
Here's the thing: skip Apollo if email deliverability is critical to your operation. One practitioner test on Reddit found Apollo at roughly 65% accuracy - a third of contacts were bad. The sentiment on r/AskMarketing echoes this: "data quality has dropped recently." For a tool that also sends your emails, bad data doesn't just waste time. It torches your sender reputation.
Apollo's credits don't roll over either. They expire monthly, so you're paying whether you use them or not.
What You'll Actually Pay in 2026
| ZoomInfo | Apollo.io | |
|---|---|---|
| Entry tier | ~$15k-$18k/yr | Free ($0) |
| Mid tier | ~$22k-$28k/yr | Basic: $49-$59/mo |
| Higher tier | ~$35k-$45k+/yr | Organization: from $119/mo (min 3 seats) |
| Contract | Annual only | Monthly or annual (annual discounts available) |
| Negotiation room | 30-65% discounts common | Minimal |
Neither tool solves the total cost of ownership problem cleanly. ZoomInfo needs Engage for sequences - that's extra. Apollo includes sequences but needs a verification layer - that's extra. Either way, you're stacking tools and costs.
Data Quality: The Numbers Nobody Shares
A practitioner on r/SaaS ran a six-week test across 500 accounts and the results were telling: Apollo hit ~65% accuracy, ZoomInfo hit ~75%, and a waterfall enrichment approach hit 88%. The same test found Apollo took 6 hours to build and verify a 500-account list, ZoomInfo took 5.5 hours, and the waterfall approach took just 2.5 hours.
ZoomInfo markets under 5% bounce rates. Apollo users report bounces as high as 35%. That gap matters when your email bounce rate is on the line. In our experience testing these platforms head-to-head, the accuracy claims in both tools' marketing materials don't hold up under real outbound conditions - especially outside the US market.
Let's be honest: if you're running high-volume outbound, a 25-35% bounce rate isn't just annoying. It's a business risk. One bad campaign can land your domain on blocklists that take months to recover from. We've watched agencies burn through three sending domains before realizing the problem was upstream in their data, not in their copy or sequencing.
Prospeo takes a different approach to this problem - 98% email accuracy on a 7-day data refresh cycle, compared to the 4-6 week industry average, so contacts are current when you actually hit send. It plugs into whatever sequencer you already run (Lemlist, Instantly, Smartlead, Salesloft) without forcing you onto a new platform.
That practitioner test found it takes 5-6 hours to build and verify 500 accounts in ZoomInfo or Apollo. Prospeo's 143M+ verified emails and 30+ search filters cut list-building time in half - with 98% accuracy so you skip the verification layer entirely.
Build cleaner lists in half the time. No credit card required.
FAQ
Why doesn't the DiscoverOrg vs Apollo.io comparison apply anymore?
DiscoverOrg merged into ZoomInfo after a $735M acquisition on February 4, 2019. By September 2019, the combined entity rebranded to "ZoomInfo Powered by DiscoverOrg," and DiscoverOrg stopped being sold separately. The modern comparison is ZoomInfo vs Apollo.io - all legacy DiscoverOrg features now live inside ZoomInfo's platform.
What's the cheapest option with reliable B2B data?
Prospeo starts free with 75 verified emails per month and runs roughly $0.01 per email on paid plans. Apollo's free tier is generous but its 65% accuracy means you'll burn credits on bad contacts. ZoomInfo starts at $15k+/year - hard to justify unless you're running enterprise ABM programs.