Scrubby vs SignalHire: Different Tools, Different Problems
You pull 500 leads from Apollo, run them through your email verifier, and 200 come back labeled "catch-all" or "risky." Now what? You can't send to them confidently, but you also can't throw away 40% of your list - especially when 30% of B2B records go stale every year. This is exactly where the Scrubby vs SignalHire comparison falls apart, because these two tools solve completely different problems.
30-Second Verdict
Scrubby validates risky catch-all emails you already have. It's a second-pass validator, not a contact finder.
SignalHire finds contact info - emails, phones - for prospects and companies you're researching. It's a discovery tool with a browser extension workflow.
Skip both if you want discovery and catch-all verification in one platform. Prospeo handles both with 98% email accuracy and built-in catch-all handling, so there's no separate validator needed.
What Each Tool Actually Does
Scrubby sits downstream in your workflow. You've already got emails from another provider, but your SMTP verifier flagged a chunk as "catch-all." Scrubby sends actual blank test emails at scale to determine deliverability, with results taking 24-72 hours and some bounces trickling in up to two days after that. It claims 98% hard-bounce detection.
SignalHire is an upstream tool - a B2B contact discovery platform with 850M+ profiles and a browser extension for pulling emails and phone numbers while you prospect. It claims 95%+ accuracy with credits deducted only when a valid contact is returned, and it includes built-in email sequences and ATS/CRM integrations.
Don't confuse SignalHire's real-time verification with catch-all validation. SignalHire verifies emails it finds in real time. Scrubby verifies that a catch-all domain will actually deliver your message. Fundamentally different processes.
Feature Comparison
| Feature | Scrubby | SignalHire |
|---|---|---|
| Category | Catch-all validator | Contact discovery |
| Database | None (you bring data) | 850M+ profiles |
| What it does | Validates risky emails | Finds emails + phones |
| Accuracy claim | 98% bounce detection | 95%+ accuracy |
| Turnaround | 24-72 hours | Real-time lookups |
| Integrations | API | Extension, CRM, API |
| G2 rating | 4.8/5 (45 reviews) | 3.7/5 (56 reviews) |
One thing worth flagging: SignalHire's API is webhook-only with 7-10 second response times. That creates real friction if you're building any kind of real-time enrichment workflow.
Pricing Breakdown
| Plan | Scrubby | SignalHire |
|---|---|---|
| Free | 7-day trial, 100 credits | $0/mo, 5 credits (10 w/ extension) |
| Entry paid | $27/mo (1K credits) | $69/mo (emails only) |
| Mid-tier | $127/mo (5K credits) | $69/mo (phones only) |
| Full | $247/mo (10K credits) | $139/mo (emails + phones) |
| Enterprise | Custom, starts from $0.01/credit | Contact sales |
SignalHire's annual billing drops to $57/mo for emails or phones, or $110/mo for the combo plan. Scrubby offers pay-as-you-go pricing scaling from $0.037/credit at 1K volume down to $0.01/credit at 10M.
About SignalHire's "unlimited" plan: it caps at 2,000 credits per month under a fair-usage policy. That's not unlimited. It's a soft cap with aggressive marketing.
Why pay Scrubby to validate what SignalHire finds? Prospeo's 5-step verification handles catch-all domains, spam traps, and honeypots before emails ever reach your list. 300M+ profiles, 98% accuracy, $0.01/email - no second tool required.
One platform. Discovery and catch-all verification. Zero 48-hour waits.
What Users Say
Scrubby's G2 score of 4.8/5 from 45 reviews tells a clear story: it does one thing well. Users praise its catch-all accuracy and simple workflow. The main complaint is the ~48-hour wait, which is a direct trade-off of the blank-email testing method.
SignalHire's picture is messier. Its G2 rating sits at 3.7/5 from 56 reviews, with praise for the extension's ease of use but recurring complaints about credit limits and inconsistent data. One recruiter in a Reddit roundup called it "good lookup wise but a little pricy" and flagged an instance where SignalHire returned an Alaska cell number for someone who'd never been to Alaska. On Trustpilot, multiple users report continued charges after cancellation and unresponsive support. That's a red flag we wouldn't ignore.
When to Use Each Tool
Use Scrubby when you already have contacts from another source - Apollo, ZoomInfo, a purchased list - and your SMTP verifier flagged a significant chunk as catch-all or risky. You need a second-pass validator and can tolerate the 24-72 hour turnaround. Scrubby is a specialist tool for a specialist problem.
Use SignalHire when you need to find contact info for identified prospects and want a browser extension workflow for one-at-a-time lookups. Budget for credit limits, though. The "unlimited" plan caps at 2,000/month, and verify phone numbers independently before building sequences around them.
What If You Need Both?
Here's the thing: most teams duct-taping a finder and a validator together have a workflow design problem, not a tooling problem. We've seen this pattern dozens of times - someone's paying for SignalHire to find emails, then paying again for Scrubby to validate the catch-alls, and wondering why their per-lead cost keeps climbing.
If you need contact discovery and catch-all verification, one platform should handle both. Prospeo does exactly that. Its 300M+ profiles cover the discovery side, while a 5-step verification process - including catch-all handling, spam traps, and honeypots filtering - means emails arrive pre-verified. No separate validator. No 48-hour wait. A 7-day data refresh cycle keeps records current versus the six-week industry average, and at roughly $0.01 per email with a free tier of 75 emails and 100 extension credits per month, it's cheaper than running two tools side by side.
Running two tools means double the cost and a 48-hour bottleneck on every list. Prospeo delivers verified contacts in real time with a 7-day data refresh cycle - 6x faster than the industry average. Free tier includes 75 emails and 100 extension credits monthly.
Stop duct-taping your prospecting stack together.
The Verdict
Scrubby and SignalHire aren't competitors. One validates emails you already have; the other finds new ones. If you know which problem you're solving, the choice is obvious.
Most people weighing Scrubby vs SignalHire don't actually need either one specifically. They need to decide whether they have a data-finding problem, a data-quality problem, or both. Let's be honest - if it's both, paying for two separate tools is the expensive way to solve it.
FAQ
Do Scrubby and SignalHire do the same thing?
No. Scrubby validates risky and catch-all emails you already have. SignalHire finds new contact information - emails and phone numbers. They solve different problems at different stages of the prospecting workflow.
Is SignalHire's unlimited plan really unlimited?
No. SignalHire's fair-usage policy caps the "unlimited" plan at 2,000 credits per month. Once you hit that limit, you're locked out until the next billing cycle. For teams doing serious outbound volume, that ceiling hits fast.
Is there a tool that combines contact discovery and catch-all verification?
Yes. Prospeo combines contact discovery across 300M+ profiles with 5-step email verification - including catch-all handling - so you don't need a separate validation tool. Emails come back verified at 98% accuracy, with a free tier of 75 emails per month.