Adapt.io vs Mattermark: An Honest Comparison (and a Better Option)
If you're weighing Adapt.io against Mattermark, you're probably still deciding what you actually need - contact data to fill sequences, or firmographic signals to decide which accounts to pursue. Adapt.io is a contact-finding tool for outbound teams. Mattermark is a company intelligence platform built for investors and account prioritization. That distinction matters more than any feature-by-feature breakdown.
30-Second Verdict
- Pick Adapt.io if you need contact emails for outbound prospecting on a budget and can live with daily credit caps.
- Pick Mattermark if you need company growth signals and firmographic intelligence for VC research or account scoring - but verify data freshness yourself during the trial.
- Skip both if you need verified contact data at scale without daily limits. Prospeo covers 300M+ profiles at 98% email accuracy with a free tier of 75 emails/month - 3x Adapt.io's free-plan allowance.
What Is Mattermark?
Mattermark has one of the stranger histories in B2B data. Founded as a company intelligence platform for VCs and sales teams, it was acquired by FullContact in early 2018 for less than $1M. The shareholder letter referenced "liquidation of Mattermark," and TechCrunch reported the deal would effectively shut the company down. Most people assumed it was dead.
Then it came back. Mattermark relaunched as an independent company, and the homepage today offers a 14-day free trial with no credit card required. The product lists 4M companies, 20M contacts, and 80+ fields per company, with delivery via Salesforce enrichment, REST and GraphQL APIs, spreadsheet plugins, and a Chrome extension.
Here's the thing: data freshness is a real question mark. A Hacker News thread from the shutdown era flagged the database as "terribly outdated," with broken contact info features. That was 2017, and the product has been rebuilt since - but Mattermark doesn't disclose its refresh cycle. Test thoroughly during that 14-day trial. In our experience, undisclosed refresh cycles usually mean the answer isn't flattering.
What Is Adapt.io?
Adapt.io is a straightforward contact database. It does one thing - gives you contact emails for outbound - and does it reasonably well. The platform carries a 4.6/5 rating on G2 from 2,789 reviews, with a database of 150M+ contacts across 30M companies. Adapt.io also offers a 7-day free trial with no credit card required.
Users praise ease of use (71 mentions on G2), quick access to contact information (59 mentions), responsive support (38 mentions), and decent data accuracy (30 mentions). The frustrations tell a clearer story, though. Limited credits are the #1 complaint at 34 mentions, followed by plan-level credit restrictions at 24 mentions and incorrect email addresses at 14 mentions. The free plan gives you 25 email credits, 25 enrichment credits, and 25 contacts per day. Even the $49/mo Starter plan only bumps that to 50 daily contacts with 500 email credits and 500 enrichment credits - for teams running any real volume, those caps bite within the first hour of a prospecting session.
One stat worth flagging: G2 reports Adapt.io's average time to implement at 4 months and time to ROI at 16 months. That's a long runway for a tool positioned as plug-and-play. We've found that timelines like these usually signal CRM integration complexity or data cleanup requirements that aren't obvious during the trial.
Adapt.io caps you at 25-50 contacts per day. Mattermark won't tell you when their data was last refreshed. Prospeo has 300M+ profiles with 98% email accuracy on a 7-day refresh cycle - no daily limits, no guessing if the data is current.
Get 75 free verified emails and see the difference yourself.
Head-to-Head Feature Comparison
| Feature | Adapt.io | Mattermark | Edge |
|---|---|---|---|
| Primary use | Contact data for outbound | Company intel & growth signals | Depends on need |
| Database | 150M+ contacts, 30M companies | 4M companies, 20M contacts | Adapt.io (roughly 7.5x contacts) |
| Pricing model | Credit-based plans (unlimited users) | Seat-based (per user) | Adapt.io for team access |
| Free tier | Yes (25 email credits) | 14-day trial, no CC | Adapt.io (ongoing free plan) |
| Entry price | $49/mo (500 email credits) | ~$49-99/user/mo (estimated) | Adapt.io for small teams |
| G2 rating | 4.6/5 (2,789 reviews) | Limited review data | Adapt.io |
| Delivery methods | Web app + enrichment workflows | Salesforce enrichment, API, spreadsheet plugins, Chrome | Depends on workflow |
| Data refresh | Not specified | Not disclosed | Both are opaque |
The table makes the core difference obvious. Adapt.io is built for reps who need emails. Mattermark is built for analysts and AEs who need company-level intelligence - growth signals, funding data, employee trends. If you're running cold outbound, Mattermark's 20M contacts won't get you far compared to Adapt.io's 150M+. For teams scoring accounts in an ABM motion, Adapt.io doesn't have Mattermark's 80+ firmographic fields.
On r/sales and similar communities, users comparing B2B data tools in this tier tend to focus on downstream outcomes - meetings booked, not database size. That's the right framing. A 150M-contact database with 14 G2 mentions of "incorrect email addresses" means raw volume isn't the whole story.
Pricing Breakdown
Adapt.io publishes clean pricing on its pricing page:
| Plan | Monthly | Annual | Email Credits | Daily Contacts |
|---|---|---|---|---|
| Free | $0 | $0 | 25 | 25 |
| Starter | $49 | $490/yr | 500 | 50 |
| Basic | $99 | $990/yr | 1,000 | 100 |
| Custom | Contact sales | - | Unlimited | No limit |
Annual billing saves 20%. All plans include unlimited users, which is nice for small teams. The catch: API access lives behind the Custom tier, so if you need programmatic access, you're talking to sales.
Mattermark doesn't publicly post straightforward pricing today, but it was previously priced at $49/user/month. Current pricing requires starting a trial or contacting sales. Expect $49-99/user/month based on historical pricing and comparable tools. The per-user model means costs scale with team size, unlike Adapt.io's unlimited-users structure.
Who Should Pick Which
Go with Adapt.io if you:
- Need contact emails for outbound sequences
- Run a small team where unlimited users matters
- Can work within daily credit caps or afford the Custom tier
Go with Mattermark if you:
- Need company-level growth signals for investor research or account prioritization
- Want firmographic enrichment inside Salesforce
- Are willing to verify data freshness during the trial - don't assume it's current
Let's be honest: most teams comparing these two don't actually need either. They need verified contact data without daily caps and without a 16-month ROI timeline. Both tools solve narrow problems well, but the B2B data market has moved past credit-gated databases and opaque refresh cycles.
A Better Option for Contact Data
If you landed on this comparison looking for verified contact data - not company intelligence - neither tool is the best answer in 2026. Prospeo covers 300M+ professional profiles with 143M+ verified emails at 98% accuracy. That's about 2x Adapt.io's contact database, with a verification standard neither tool matches.
Data refreshes every 7 days, compared to the industry average of 6 weeks and whatever undisclosed cycle Mattermark runs. The free tier gives you 75 emails per month - triple Adapt.io's 25 email credits. Paid plans run roughly $0.01 per email with no daily caps, no contracts, and no sales calls required. You also get 125M+ verified mobile numbers with a 30% pickup rate, 30+ search filters including buyer intent powered by Bombora, and native integrations with Salesforce, HubSpot, Instantly, and Clay. For outbound teams who've been burned by bounced emails from cheaper databases, the accuracy difference eliminates the domain reputation risk that comes with unverified data. One of our customers, Snyk, dropped their bounce rate from 35-40% to under 5% and saw AE-sourced pipeline jump 180% after switching.
A 16-month time to ROI and 14 G2 mentions of bad emails aren't problems you should inherit. Prospeo's 5-step verification eliminates bounces, and at $0.01 per email, you'll spend less scaling to real volume than either tool's starter plan.
Stop rationing credits - start booking meetings with data that connects.
FAQ
Is Mattermark still active in 2026?
Yes. Mattermark relaunched as an independent company after FullContact acquired it in early 2018. The site currently offers a 14-day free trial with no credit card required and lists a database of 4M companies and 20M contacts across 80+ fields.
Does Adapt.io have a free plan?
Adapt.io's free plan includes 25 email credits, 25 enrichment credits, and 25 contacts per day - enough for light research but not sustained outbound. The Starter plan at $49/month bumps you to 500 email credits and 50 daily contacts. All plans include unlimited users.
Can I use Mattermark for outbound prospecting?
Mattermark's strength is company intelligence - growth signals, funding rounds, and firmographic data across 80+ fields. Its 20M contact records are a fraction of what dedicated prospecting tools offer, so it works better for account scoring than filling outbound sequences.