Mattermark vs Apollo.io: One Tool Is Dead - Here's What to Use Instead
You found "Mattermark" in an old blog post, a dusty CRM field, or a 2016 investor deck someone forwarded you. Here's the short version: Mattermark shut down in 2018. If you're weighing Mattermark vs Apollo.io in 2026, this isn't a comparison - it's a redirect to what actually works.
30-Second Verdict
- Mattermark: Defunct. You can't buy it, trial it, or use it.
- Apollo.io: Active all-in-one sales platform with a large database and built-in sequencing, but email accuracy sits around 79% and credit limits frustrate high-volume teams.
- Dealroom / Tracxn: If you need company intelligence and funding data - Mattermark's original use case - these are the modern replacements.
What Happened to Mattermark?
Mattermark was an ML-driven company intelligence platform built for investors and BD teams. It pulled growth signals from SEC filings, news, and social data to help users discover and score private companies. For a few years in the mid-2010s, it was the go-to tool for startup discovery.
Then it collapsed fast. In December 2017, TechCrunch reported that FullContact acquired Mattermark for less than $1 million - and the acquisition proceeds were explicitly used to wind the company down. By the end of 2018, Mattermark was down to 7 employees and had ceased operating as an independent product. If you're seeing Mattermark referenced anywhere in 2026, you're working from a recommendation that's 7+ years stale.
Apollo.io in 2026
Use Apollo if you want a single platform combining contact search, email sequencing, intent data, and deal intelligence without stitching together five tools. Apollo's database covers 275M+ contacts across 73M+ companies, and it offers technographics, job change filters, and Bombora-powered intent signals. It holds a 4.7/5 rating on G2 from 9,500+ reviews and earned the #13 spot in G2's 2026 Best Sales Software rankings out of 446 products.
Skip Apollo if data accuracy is your top priority. "Inaccurate Data" is one of the most common negative tags on G2, and it shows up exactly where it hurts most: bounce reports and wasted SDR time. Apollo also had two widely cited security incidents in 2018 and 2021 tied to 130M+ exposed records, which matters if your security team has opinions about that sort of thing.
Apollo's 79% email accuracy means 1 in 5 emails bounce - burning your domain reputation and wasting SDR hours. Prospeo delivers 98% verified emails from 300M+ profiles, refreshed every 7 days, at $0.01 per email with no annual contracts.
Stop paying for bounced emails. Start sending to real inboxes.
Apollo.io Pricing Breakdown
Apollo's pricing looks simple until you hit the credit limits:
| Plan | Price/user/mo | Mobile credits/mo | Export credits/mo |
|---|---|---|---|
| Free | $0 | 5 | 10 |
| Basic | $49 | 75 | 1,000 |
| Professional | $79 | 100 | 2,000 |
| Organization | $119 (min 3 users) | 200 | 4,000 |
The "unlimited email credits" line is misleading. With a verified corporate domain, you're capped at 10,000 email credits per account per month. Without verification, it drops to 100/month. Overage credits run $0.03-$0.10 each, which adds up fast for high-volume outbound teams running real campaigns.
Why This Comparison Doesn't Work
Let's be honest: Mattermark and Apollo.io were never in the same category. Mattermark was company intelligence for investors - funding rounds, growth scores, startup discovery. Apollo is an outbound sales engagement platform with a contact database bolted on. Comparing them is like comparing Bloomberg Terminal to Outreach. The fact that you're searching this matchup in 2026 means someone pointed you to a tool that hasn't existed for years.
What to Use Instead
For Company Intelligence
If you need what Mattermark actually did - startup discovery, funding data, growth signals - look at Dealroom, Tracxn, or CB Insights. These are the modern equivalents with live databases of private company data, funding events, and market maps. Expect to pay $5,000-$30,000+/year depending on seats and data access.
For Outbound Sales Data
This is what most people searching "Mattermark vs Apollo" actually need. You don't want company intelligence. You want verified emails and phone numbers to fill your sequences.
Apollo remains a solid choice if you need built-in sequencing, intent data, and a single-platform workflow. But if data quality is the priority - and for outbound, it should be - we've found the accuracy gap between 98% and 79% email verification translates directly to fewer bounces and more replies. Prospeo's database spans 300M+ professional profiles with 143M+ verified emails and 125M+ verified mobile numbers, all refreshed every 7 days versus the industry average of 6 weeks. Pricing is transparent at roughly $0.01 per email with no contracts.
Here's the thing: most teams don't need Apollo's all-in-one platform. They need accurate data piped into the sequencer they already use. If your average deal size is under $15k, you're better off pairing a dedicated data tool with Instantly or Smartlead than paying for Apollo's built-in sequences you'll outgrow in six months. The consensus on r/sales tends to agree - stacking best-in-class point solutions usually beats a Swiss Army knife that's mediocre at everything.
Side-by-Side Comparison
| Mattermark | Apollo.io | Prospeo | |
|---|---|---|---|
| Status | Defunct (acquired 2018) | Active | Active |
| Use case | Company intelligence | All-in-one sales | B2B contact data |
| Email accuracy | N/A | ~79% | 98% |
| Mobile numbers | N/A | Available (~11% pickup) | 125M+ (30% pickup) |
| Pricing | Discontinued | $0-$119/user/mo | Free tier, ~$0.01/email |
| Data refresh | N/A | Not disclosed | 7 days |
| CRM integrations | N/A | 64+ | Salesforce, HubSpot, Smartlead, Instantly |
| Contracts | N/A | Annual terms common; seats can't be reduced mid-term | No contracts |
You don't need a dead tool or a Swiss Army knife with 79% accuracy. Prospeo gives you 143M+ verified emails and 125M+ mobile numbers with a 30% pickup rate - plug it into Instantly, Smartlead, or your CRM and start booking meetings today.
Best-in-class data, no contracts, 75 free credits to prove it.
FAQ
Is Mattermark still available?
No. FullContact acquired Mattermark in January 2018 for less than $1 million, and the proceeds were used to shut the company down. The platform isn't sold, maintained, or accessible. For company intelligence, use Dealroom or Tracxn instead.
Is Apollo.io worth it in 2026?
Apollo is strong for teams that need sequencing, intent data, and contact search in one tool - especially at the $49-$79/user tier. But its ~79% email accuracy and monthly credit caps frustrate high-volume outbound teams. We'd recommend testing a specialized data provider alongside Apollo before committing to an annual contract.
What's a good free alternative for B2B contact data?
Prospeo offers a free tier with 75 email credits and 100 Chrome extension credits per month - enough to test real outbound campaigns. Apollo's free plan gives you only 5 mobile credits and 10 exports. For small teams running actual sequences, Prospeo's free plan delivers more usable data out of the box.