DiscoverOrg vs SignalHire: Which B2B Data Tool Wins in 2026?
If you're comparing DiscoverOrg vs SignalHire, here's the first thing you need to know: DiscoverOrg doesn't exist anymore. It merged into ZoomInfo back in 2019. So this is really a ZoomInfo vs SignalHire comparison - two tools that couldn't be more different in scope, pricing, or who they're built for.
We've tested both extensively, and the short version is that most teams shouldn't pick either one.
30-Second Verdict
Enterprise teams with $30k+ budgets should go with ZoomInfo. You're paying for scale, intent data, and deep CRM integrations. Freelancers or recruiters doing occasional lookups will find SignalHire works fine - it's cheap, the extension is easy, and you don't need a procurement cycle. Everyone else? Skip both. Prospeo delivers 98% email accuracy at roughly $0.01/lead with no contract and no sales call required.
Side-by-Side Comparison
| Feature | ZoomInfo (DiscoverOrg) | SignalHire | Winner |
|---|---|---|---|
| Database size | 500M+ profiles | 850M claimed | SignalHire (on paper) |
| Verified emails | 174M | Not disclosed | ZoomInfo |
| Direct dials | 70M | Not disclosed | ZoomInfo |
| G2 rating | 4.5/5 (9,036 reviews) | 3.7/5 (56 reviews) | ZoomInfo |
| Pricing | ~$15k-$60k+/yr | $0-$139/mo | SignalHire |
| Contract | Annual lock-in | Self-serve monthly/annual | SignalHire |
| Intent data | Yes (1B+ signals/mo) | No | ZoomInfo |
| Free tier | No | 5 credits/mo (10 w/ extension) | SignalHire |
| CRM integrations | Salesforce, HubSpot, and others | Salesforce, HubSpot, Zoho | ZoomInfo |
| Compliance | GDPR/CCPA | GDPR/CCPA | Tie |
ZoomInfo wins on data depth and features. SignalHire wins on price and flexibility. Neither wins on value for the average sales team - ZoomInfo costs too much, and SignalHire's data isn't reliable enough.
ZoomInfo charges $15K+ per year and locks you into annual contracts. SignalHire gives you Alaska phone numbers for prospects who've never left New York. Prospeo delivers 98% verified email accuracy across 300M+ profiles at roughly $0.01 per lead - no contract, no sales call.
Stop choosing between overpriced and inaccurate. Start for free.
ZoomInfo: The Enterprise Heavyweight
ZoomInfo's database covers 500M+ professional profiles, 174M verified emails, and 70M direct dials, processing over 1B buying signals per month. The breadth is unmatched, and the intent data layer gives enterprise teams a real edge in prioritizing accounts that are actually in-market.
If you're building a full outbound motion, it also helps to understand the broader landscape of sales prospecting databases and how they fit into your stack.
The pain points are equally real, though. List pricing starts at $14,995/year for Professional+, but most teams land at $30k-$60k+ after adding seats and modules. Discounts of 30-65% are common with negotiation, but you need procurement leverage to get there. Annual contracts auto-renew with a 60-90 day cancellation window - miss it and you're locked in another year. Renewal increases of 10-20% are standard, unused credits don't roll over, and overages run $0.25-$0.50 each.
The consensus on r/sales is blunt. One recruiter reported paying "$18,000-15,000 a year for a solo user" and concluded it's accurate but "no way is it $18,000 good." That's the core tension - the data is broad, but the price-to-value math breaks down fast for smaller teams.
If you're trying to reduce waste from bad records, data enrichment services can help fill gaps and standardize fields before you push anything into your CRM.
SignalHire: Cheap but Limited
SignalHire positions itself as the affordable alternative. On paper, the numbers look impressive: 850M profiles, 95%+ claimed accuracy, and a 96% hit rate. The Chrome extension works across professional profiles, GitHub, and company websites.
If you're evaluating similar tools in this category, our breakdown of the SignalHire Email Finder goes deeper on what it gets right (and wrong).
Pricing is genuinely accessible:
| Plan | Monthly | Annual (per month) |
|---|---|---|
| Free | $0 (5 credits) | - |
| Emails | $69/mo | $57/mo |
| Phones | $69/mo | $57/mo |
| Emails + Phones | $139/mo | $110/mo |
Paid tiers support unlimited users with shared credits, plus CSV enrichment/export, a browser extension, integrations, and API access. Bulk upload handles up to 1,000 names at a time. For a recruiter doing a handful of lookups per week, it works.
But the cracks show fast at any real volume. That "unlimited" package? Capped at 2,000 credits/month under a fair usage policy - read the fine print. The G2 rating sits at 3.7/5 from just 56 reviews, with cons frequently mentioning "fraudulent information," outdated contacts, and limited credits. One recruiter on Reddit tested it and got an Alaska phone number for a prospect who'd never been to Alaska, plus "a bunch of cell and home numbers from his past."
Here's the thing: SignalHire is a $57/month tool that performs like a $57/month tool. If your outbound volume is under 50 contacts a week and you verify every result manually, it's fine. The moment you try to scale, the accuracy gap will burn your domain reputation faster than the savings are worth.
If you're worried about deliverability fallout, start with the basics: email bounce rate and how to improve sender reputation.
A Stronger Option for Most Teams
Let's be honest - if ZoomInfo's pricing is overkill and SignalHire's accuracy is a coin flip, there's a gap in the market that neither fills well. Prospeo sits right in that gap with 300M+ professional profiles, 143M+ verified emails, and 125M+ verified mobile numbers. Email accuracy hits 98% thanks to a proprietary 5-step verification process, and data refreshes every 7 days versus the 6-week industry average. That means you're not emailing someone who changed jobs two months ago.
Pricing starts with a free tier of 75 verified emails and 100 extension credits per month. Paid plans run roughly $0.01/email - no annual contracts, no sales calls, fully self-serve. In our experience, teams switching from ZoomInfo consistently get higher email accuracy at 90% lower cost. That's not a rounding error; it's a fundamentally different pricing model.
If you're building lists from scratch, you may also want a workflow for how to generate an email list and a quick reference on name to email matching.
SignalHire's data refreshes on an unknown cycle. ZoomInfo's 6-week refresh means you're emailing job changers who moved on months ago. Prospeo refreshes every 7 days with 5-step verification - so your outbound actually lands.
Fresh data, 98% accuracy, and zero procurement headaches.
FAQ
Is DiscoverOrg still available?
No. DiscoverOrg merged into ZoomInfo in 2019, and ZoomInfo is the product buyers evaluate today. All DiscoverOrg features, data, and contracts have been folded into ZoomInfo's platform.
Is SignalHire accurate enough for outbound?
SignalHire claims 95%+ accuracy, but G2 reviews frequently cite outdated contacts and wrong phone numbers. The 3.7/5 rating from 56 reviews reflects a tool that's convenient for occasional lookups but inconsistent at scale. Always verify contacts before launching sequences - a single bad batch can tank your sender reputation. Reddit threads also recommend SalesQL and SeekOut as alternatives worth testing.
How do ZoomInfo and SignalHire compare on intent data?
ZoomInfo processes over 1B buying signals per month and offers strong intent-data filtering - a major advantage for account-based strategies. SignalHire has no intent data at all. If in-market buyer signals matter to your workflow, skip SignalHire entirely and evaluate either ZoomInfo or a more cost-effective option with Bombora-powered intent tracking.