SignalHire vs WarpLeads: Volume, Accuracy, or Both?
There's no meaningful head-to-head comparison of these two tools anywhere online. That's a problem when you're choosing between a credit-based contact finder and an unlimited bulk export database - two fundamentally different approaches to the same goal. We've tested both and broken them down across the metrics that actually matter for outbound teams shipping campaigns every week.
30-Second Verdict
SignalHire charges credits only when it successfully returns contact data. Best for teams that want ready-to-use data without a post-export cleaning step.
WarpLeads gives you unlimited bulk exports at $99/month. Best if you've already got a verification workflow and need raw volume above all else.
Side-by-Side Comparison
| Feature | SignalHire | WarpLeads | Edge |
|---|---|---|---|
| Database size | 200M+ profiles | 100M+ people | SignalHire |
| Starting price | Free; paid from $49/mo | $99/mo (unlimited) | SignalHire |
| Verification | Real-time verified emails/direct dials | Post-export verification mandatory | SignalHire |
| Accuracy model | Credits charged only on success | ~70% valid after cleaning | SignalHire |
| Chrome extension | Yes | Yes | Tie |
| API access | REST API available | Starts at $299/mo (billed quarterly) | Tie |
| Technology filter | Not a core focus | Yes | WarpLeads |
| G2 rating | 3.7/5 (56 reviews) | Not widely reviewed | SignalHire |
Here's the thing: if your annual contract value is under $5k, WarpLeads' volume-first model probably wastes more time on bad data than it saves on subscription costs. Pre-verified contacts win at lower ACVs.
Data Quality - The Real Differentiator
Unlimited exports mean nothing if 30% of your list bounces.
WarpLeads' own help center is refreshingly honest about this. Third-party email verification after export is mandatory, and they say you'll "usually get around 70% valid emails after cleaning with Reoon." They also acknowledge the database refreshes every few months and that you'll find older data mixed in. That's a volume-first model - you pull big, clean aggressively, and work with what survives. To their credit, WarpLeads does offer a Technology filter and lets you export up to 10,000 records at once, which helps technical buyers narrow targeting before pulling the trigger.
SignalHire takes the opposite approach. Credits are charged only when at least one email or phone number is successfully returned, so you're paying for contact data that's meant to be usable immediately - no separate cleaning step, no wasted sends. The tradeoff is volume: on the Emails plan at $69/month, you get 1,000 credits. In our experience, pre-verified contacts consistently outperform bulk-exported lists on deliverability, but the per-contact cost climbs fast once you're past a few thousand lookups a month.
If you're trying to systematize list building at scale, it helps to treat this as a repeatable lead generation workflow rather than a one-off export.
SignalHire caps your credits. WarpLeads makes you clean 30% bad data. Prospeo's 300M+ profiles come pre-verified at 98% accuracy through a 5-step process - refreshed every 7 days, not every few months. At $0.01/email, you get SignalHire's quality at WarpLeads' economics.
Get volume and accuracy without picking a side.
Pricing Breakdown
SignalHire: Free (5 credits), $69/mo (1,000 email credits), $139/mo (900 credits on the Emails & Phones plan). G2 comparison pages list an entry-level anchor of $2,500/year. Common complaints on review sites: "expensive" and "limited credits." Fair criticism at scale.
If you're comparing tools by true cost per usable contact, it's worth mapping it against your cost to acquire customer and expected conversion rates.
WarpLeads: Free (30 contacts/month), $99/mo (unlimited exports). API access requires an active Unlimited subscription, and API Starter runs $299/month billed quarterly ($897 upfront) - so you're effectively at $398/month minimum on a monthly-equivalent basis. WarpLeads also sells additional export add-ons starting at $40/month for 5,000 exports, which introduces per-export pricing alongside the "unlimited" positioning. And because verification is mandatory, budget for an email verifier too.
If you're planning to clean lists, start with bounce prevention basics and benchmarks for email bounce rate before you scale sends.
Let's be honest - neither pricing model is straightforward. SignalHire gets expensive at volume. WarpLeads looks cheap until you factor in verification costs and the 30% data loss baked into every export.
What Real Users Say
Reddit sentiment on WarpLeads is genuinely split. One user in r/Emailmarketing called the quality "terrible - high bounce rate, old emails" even after verifying through Apollo. But a detailed 90-day A/B test across six databases told a very different story: WarpLeads hit a 9% bounce rate and $22/qualified lead, beating ZoomInfo (11% bounce, $89/qualified lead) and Apollo (22% bounce, $47/qualified lead). The takeaway from the r/coldemail consensus? WarpLeads results are highly ICP-dependent. Tight targeting plus proper verification makes the economics work; broad or niche ICPs mean more waste.
If you want a tighter targeting framework before you export anything, use an Ideal Customer Profile scoring rubric and build your filters from there.
SignalHire's Trustpilot reviews (3.8/5, 73 reviews) praise lookup speed but flag regional accuracy gaps and slow support response times.
A Third Option Worth Testing
If you want verified data out of the box - no cleaning step, no third-party verifier, no credit caps throttling your workflow - Prospeo eliminates the tradeoff that SignalHire and WarpLeads force you into.
Its 300M+ profiles run through a 5-step proprietary verification process with catch-all handling, spam-trap removal, and honeypot filtering, delivering 98% email accuracy on a 7-day refresh cycle while the industry average sits at six weeks. You also get 125M+ verified mobile numbers with a 30% pickup rate and 30+ search filters including buyer intent powered by Bombora, technographics, job changes, and headcount growth. Teams like Snyk cut bounce rates from 35-40% to under 5% after switching, while Stack Optimize built to $1M ARR maintaining 94%+ deliverability and zero domain flags across all clients.
If you're evaluating alternatives across the category, compare against other sales prospecting databases and shortlist based on your send volume and verification needs.
Paid plans start at roughly $0.01 per email with no contracts, and the free tier gives you 75 verified emails per month to test before committing a dollar.
WarpLeads' tech filters are useful, but Prospeo gives you 30+ filters - buyer intent, technographics, job changes, headcount growth, and funding - on top of 98% verified emails. Teams like Snyk dropped bounce rates from 35% to under 5% and added 200+ opportunities per month.
Replace your bulk export and your verifier with one platform.
FAQ
Is WarpLeads data accurate enough for cold email?
Their own help center says third-party verification is mandatory, with around 70% of emails surviving cleaning. Budget for a verifier like Reoon or ZeroBounce and expect to discard roughly a third of every export before sending.
Is SignalHire worth the higher per-contact cost?
At low volumes (under 1,000 lookups/month), yes - you pay only for successful lookups and skip verification entirely. Past 2,000+ contacts per month, the per-contact cost exceeds WarpLeads' flat rate even after factoring in WarpLeads' data loss.
Can one tool replace both?
For most outbound teams, yes. A platform with 300M+ profiles, 98% email accuracy, and a weekly refresh cycle covers both the quality of SignalHire and the scale of WarpLeads without the tradeoffs. We'd recommend starting with a free tier to validate against your ICP before committing to any annual plan.