Mattermark vs SignalHire: Honest Comparison (2026)

Mattermark vs SignalHire: What Nobody Else Will Tell You

If you're comparing Mattermark vs SignalHire, here's the first thing to know: they're not competitors. Mattermark is a company intelligence platform that sold for under $1M in late 2017 and later relaunched. SignalHire is a contact discovery tool with a 3.7-star G2 rating and an "unlimited" plan that isn't unlimited. Meanwhile, roughly 30% of B2B contact records go stale every year, costing sales teams an estimated 546 hours annually - and neither tool has a convincing answer for that.

30-Second Verdict

Mattermark tracks company growth signals. SignalHire finds emails and phone numbers. They don't compete.

If you need company intelligence, look at established databases like Crunchbase or PitchBook. If you need contact data, SignalHire works but has accuracy issues, especially outside the US. For reliable, verified contact data, Prospeo delivers 98% email accuracy on 300M+ profiles with a 7-day refresh cycle and a free tier.

What Happened to Mattermark

Mattermark raised over $17M in venture funding, then sold to FullContact for under $1M in late 2017. Deal documents used the word "liquidation." FullContact paid less than $500K in cash - earmarked for shutdown costs - and retained just six employees. Tracxn lists the acquisition date as January 18, 2018, and showed 7 employees as of December 31, 2018.

By 2019, industry posts noted Mattermark was back as an independent company. Today, its website is live and says it has "re-launched as an independent company", claiming 4 million companies and 20 million key contacts across 80+ data fields. Hacker News users who tried it around the shutdown reported the database was "terribly outdated." We haven't been able to independently verify the current data quality, and that's a lot of question marks for a tool you'd trust with pipeline data.

If you're evaluating alternatives, start with B2B company data providers and data enrichment services that publish clearer sourcing and update practices.

What SignalHire Actually Does

SignalHire is a browser-based contact finder. Install the Chrome extension, visit web pages where a person or company is mentioned, and it pulls back emails and phone numbers. It also includes unlimited users on its plans - it doesn't price by seat - which is unusual for this category. G2 reviewers frequently mention helpful support as a plus.

Use this if you need a quick, cheap way to grab contact info one at a time, or you're a solo recruiter or SDR with modest volume needs.

Skip this if you need high-accuracy data at scale. G2 reviewers flag outdated contacts and incomplete data, and accuracy gets noticeably weaker outside the US. You'll also burn through credits fast - the free plan gives you 5 credits (10 with the extension installed), and paid plans get expensive quickly. And that "unlimited" $167/mo plan? It caps you at 5,000 credits per month under a fair-usage policy. That's roughly 160-170 lookups per day, not unlimited by any stretch.

If you're comparing tools in this category, see our breakdown of SDR tools and email ID finder tools.

Pricing and Features Compared

SignalHire's emails-only plan runs $69/mo billed monthly for 1,000 credits, or $57/mo billed annually for 12,000 credits/year. Bundling emails and phones jumps to $139/mo billed monthly for 900 credits, or $110/mo billed annually for 10,800 credits/year.

Mattermark's published pricing includes a Standard plan at $49 per user/month and a Professional plan at $500 per user/month on an annual contract, with Enterprise custom pricing above that.

Here's the thing: SignalHire claims 3-5% average bounce rates, but G2 reviews paint a mixed picture on accuracy for many users. Neither tool discloses a concrete data refresh cycle, which tells you something. If you're trying to reduce bounces, use an email bounce rate benchmark and pair it with an email deliverability guide before scaling volume.

The Real Verdict

Don't pick between these two. They solve different problems, and neither inspires full confidence in 2026.

For company intelligence and growth signals, Crunchbase and PitchBook are the established players. For contact data, SignalHire is functional but mediocre on accuracy.

Let's be honest - if you're searching "Mattermark vs SignalHire" in 2026, you're probably solving the wrong problem. What most sales teams actually need isn't company intelligence or a basic contact finder. It's verified contact data that won't torch their sender reputation. That's a different category entirely - especially if you're doing cold email marketing at any real scale.

We've seen this play out with our own users. Meritt tripled pipeline from $100K to $300K/week after switching to Prospeo, cutting bounce rates from 35% to under 4%. The difference comes down to data freshness - a 7-day refresh cycle versus the industry average of six weeks means you're not emailing people who changed jobs two months ago.

FAQ

Is Mattermark still active in 2026?

Mattermark's website is live with a "re-launched as an independent company" message, claiming 4 million companies and 20 million contacts. But the 2017 shutdown, sub-$1M liquidation sale, and limited transparency around current data quality all warrant caution before trusting it with pipeline decisions.

Is SignalHire's unlimited plan really unlimited?

No. The $167/month plan caps usage at 5,000 credits per month under a fair-usage policy - roughly 160-170 lookups per day. That's a hard ceiling, not unlimited.

What's a reliable alternative for verified contact data?

Prospeo delivers 98% email accuracy across 300M+ profiles with a 7-day data refresh cycle, 125M+ verified mobiles, and a free tier of 75 emails per month. Paid plans start at around $39/mo with no annual contracts - significantly cheaper per lead than SignalHire at scale.