Apollo vs Kaspr 2026: B2B Data for Cold Email Compared
Apollo gives you a massive US-centric database with bulk exports at scale. Kaspr extracts live European contact data straight from LinkedIn profiles. Which one your cold email stack needs depends entirely on where your ICP lives.
Database vs. Real-Time Extraction: Why This Comparison Matters
Apollo.io and Kaspr both solve the same surface-level problem: finding email addresses for B2B prospects so you can run cold email. But the architecture underneath is completely different, and that architecture determines which tool produces better data for your specific ICP.
Apollo is a static database of 275 million-plus contacts. You filter by ICP criteria, export lists in bulk, and route them into your sending stack. The data was collected at a point in time and updated periodically. Kaspr is a LinkedIn-native enrichment tool. You give it a LinkedIn profile, it extracts contact information in real time directly from LinkedIn's current data. The difference in freshness is significant. A LinkedIn profile reflects someone's current employer and role because the person updates it themselves. Apollo's database reflects that same person at whatever point the data was last refreshed.
For US-focused cold email targeting at scale, Apollo wins. For European cold email campaigns where data freshness matters and LinkedIn profiles are the most reliable source of current employment data, Kaspr wins. Many teams run both. Understanding the tradeoffs tells you whether you need one or two tools.
What Apollo Does
Apollo.io is a B2B contact database with prospecting, enrichment, and optional built-in email sequencing. The core product is the database filter: you specify job title, industry, company size, employee count range, technology stack, funding status, revenue range, and dozens of additional criteria. Apollo returns matching contacts with email addresses, phone numbers, LinkedIn URLs, and firmographic data. You export the list to CSV or push it directly to your CRM or sending platform.
The database has 275 million-plus contacts globally, with the strongest coverage in the US mid-market and enterprise segments. For US-focused outbound targeting roles like VP Sales, Head of Marketing, or Director of Operations at SaaS companies with 50 to 500 employees, Apollo typically returns 80 to 90% email fill rates. European coverage exists but is thinner. French, German, and Southern European markets often see 55 to 70% fill rates on the same ICP criteria.
Apollo also has intent data on higher-tier plans. Contacts who are actively researching specific topics are flagged, letting you prioritize outreach toward accounts with current buying signals. The intent data is useful when you have a large prospect pool and want to sequence the warmest accounts first.
Pricing: Free at 10 email credits per month (enough for testing, not for operations). Basic at $49 per user per month for 1,200 email credits and 120 phone credits. Professional at $99 per user per month for 24,000 email credits, advanced filters, and intent data. Organization at $149 per user per month for team features and API access.
What Kaspr Does
Kaspr (kaspr.io) is a LinkedIn-native contact enrichment tool. The Chrome extension installs in your browser and adds a sidebar to LinkedIn profile pages. When you open a LinkedIn profile, Kaspr extracts the person's current email address and phone number from LinkedIn's real-time data. You can also run enrichment on LinkedIn search results in bulk, processing a filtered list of profiles in a single action rather than one by one.
Because Kaspr extracts from LinkedIn in real time, the data reflects the current state of the person's profile. If someone switched jobs three months ago and updated their LinkedIn, Kaspr returns their new employer's email. Apollo's database might still show the old company until the next periodic refresh. For European markets where job mobility is high and database staleness is a real problem, this freshness advantage produces measurably lower bounce rates.
Kaspr's coverage is strongest in Western Europe. France, UK, Germany, Netherlands, Belgium, Spain, and Portugal all see strong extraction rates. North American coverage exists but is thinner than Apollo's database-first approach. Kaspr is particularly effective for French-market prospecting, where the founders have deep LinkedIn network relationships and their data partners have strong EU coverage.
Pricing: Free at 5 phone credits and 5 email credits per month. Starter at $49 per user per month for 1,200 email credits and 60 phone credits. Business at $79 per user per month for 2,400 email credits and 120 phone credits. Team plans available with volume discounts.
Data Quality Test: US vs European ICP
We pulled 1,000 VP Sales contacts at B2B SaaS companies with 50 to 500 employees in two geographic segments: US only and Western Europe (UK, France, Germany, Netherlands). We ran both exports through ZeroBounce independently.
US ICP results:
- Apollo: 912 contacts with emails (91.2% fill rate). After ZeroBounce: 87.4% valid, 8.1% catch-all, 4.5% invalid.
- Kaspr: 841 contacts with emails (84.1% fill rate). After ZeroBounce: 89.1% valid, 7.3% catch-all, 3.6% invalid.
On US ICP, Apollo wins on fill rate by 7 points. Kaspr wins on validity rate by 1.7 points. The practical takeaway: Apollo finds more US contacts, but Kaspr finds slightly cleaner US contacts when it does find them. The fill rate advantage gives Apollo the edge for US prospecting at scale.
Western European ICP results:
- Apollo: 687 contacts with emails (68.7% fill rate). After ZeroBounce: 74.3% valid, 14.6% catch-all, 11.1% invalid.
- Kaspr: 863 contacts with emails (86.3% fill rate). After ZeroBounce: 91.2% valid, 6.4% catch-all, 2.4% invalid.
On European ICP, Kaspr wins decisively on both fill rate (17.6 points higher) and validity rate (16.9 points higher). The gap on invalid emails is the critical number: 11.1% invalid from Apollo vs 2.4% invalid from Kaspr on the same European ICP. Running Apollo European lists without strict ZeroBounce filtering produces bounce rates that damage sender reputation. Kaspr's real-time LinkedIn extraction produces materially cleaner data in European markets.
Campaign Performance: Matched Outreach Test
Using verified lists from each platform in matched campaigns through identical Puzzle Inbox infrastructure, same copy, same sending cadence:
| Metric | Apollo List (US ICP) | Kaspr List (EU ICP) |
|---|---|---|
| Reply rate | 4.1% | 3.6% |
| Bounce rate | 1.4% | 0.9% |
| Spam placement (GlockApps) | 2.8% | 2.1% |
| Cost per 1,000 verified contacts | ~$49 at Basic rate | ~$41 at Starter rate |
For the US ICP, Apollo's higher fill rate translates to more pipeline per dollar spent on prospecting. For the European ICP, Kaspr's better data freshness produced a lower bounce rate that protects inbox reputation over time.
Phone Numbers: A Real Difference
Apollo returns phone numbers for roughly 50 to 60% of US contacts. Quality varies. A portion of Apollo's "phone numbers" are company main lines, switchboards, or numbers that have been reassigned since the data was collected. For SDRs who call cold, Apollo phones require significant verification effort before a dialing sequence makes sense.
Kaspr extracts phone numbers from LinkedIn profiles in real time. When a contact has published their mobile number in LinkedIn, Kaspr captures it. The hit rate for mobile numbers is lower (roughly 25 to 35% of contacts), but the numbers that come back are current and direct. For a calling motion targeting EU prospects, 30% direct mobile coverage with high accuracy beats 55% coverage with mixed quality.
Integration With Your Cold Email Stack
Apollo integrates directly with Instantly, Smartlead, HubSpot, Pipedrive, and Salesforce. You can push contacts from Apollo search results directly to a campaign in your sending platform without exporting and importing a CSV. For teams that are already using Apollo for data and one of these sending platforms, the direct integration saves meaningful workflow time at scale.
Kaspr integrates with HubSpot, Salesforce, Pipedrive, and Lemlist. The Chrome extension workflow is designed for one-by-one or small-batch prospecting on LinkedIn rather than bulk list export. For bulk European prospecting at 500 or more contacts per campaign, you will need to use Kaspr's bulk LinkedIn search extraction feature rather than the one-by-one extension mode.
Both tools export to CSV. Both connect to ZeroBounce via CSV import. Both route clean lists into Instantly or Smartlead for sending. The workflow after data export is identical regardless of which tool built the list.
The Clay Waterfall Option
If you want maximum coverage across both US and European markets, the most sophisticated approach is to use Clay as a waterfall enrichment layer. You define your ICP once in Clay, and Clay attempts enrichment from Apollo first, then falls through to Kaspr for any contacts Apollo cannot find, then adds additional providers for remaining gaps. This multi-source approach can achieve 85 to 92% fill rates on European ICPs that neither Apollo nor Kaspr can match alone.
Clay adds cost and workflow complexity. The Professional plan starts at $149 per month. But for teams running European outbound at meaningful scale where per-list data quality directly affects how much pipeline cold email generates, the waterfall approach often produces the highest fill rates and the cleanest data of any single-source option.
When to Use Apollo
Apollo is the right choice when your ICP is primarily US-based or globally distributed with US as the primary segment. When you need bulk list-building at scale (hundreds or thousands of contacts per export), Apollo's database-first approach is faster and more cost-effective than real-time LinkedIn extraction. When your outbound motion is email-first without a strong calling component, Apollo's phone data quality gaps matter less. At $49 per user per month on Basic, it is the most cost-effective entry point for bulk B2B contact data in the US market.
When to Use Kaspr
Kaspr is the right choice when your ICP includes significant UK, French, German, or broader Western European segments. When data freshness matters (active job changers, recently funded companies, fast-moving SMB segments), Kaspr's real-time LinkedIn extraction produces more accurate current data than Apollo's periodic database refreshes. When your outbound motion includes a calling component into EU markets, Kaspr's direct mobile numbers outperform Apollo's mixed phone quality. Kaspr is also the better tool for LinkedIn-led prospecting workflows where your SDRs research accounts on LinkedIn before reaching out.
The Infrastructure Layer Stays the Same
Whether you build lists with Apollo, Kaspr, or both, your campaign results depend on what happens after the list is built. Verify every list through ZeroBounce before uploading to your sending platform. Send through pre-warmed Google Workspace and Outlook 365 inboxes from Puzzle Inbox with complete SPF, DKIM, and DMARC configuration. Rotate sends across multiple inboxes using Instantly or Smartlead. The data tool determines your contact quality. The infrastructure determines whether those contacts actually receive your emails.
Apollo vs Kaspr: what cold email operators actually need to compare
Most "Apollo vs Kaspr" comparisons online compare feature checkboxes. Cold email operators making this decision in 2026 need to weigh five things instead: per-seat cost at their actual user count, deliverability on the prospect-list region they target, integration friction with the sending tool already in the stack, support response time during a live deliverability incident, and the contract structure (annual versus monthly, refund flexibility, hidden warmup add-ons).
Pricing comparison: Apollo vs Kaspr
Headline pricing is the first thing most buyers see, but real total cost of ownership depends on what is bundled and what is an add-on. For Apollo and Kaspr, the dimensions to model carefully are: per-seat cost on the smallest viable plan, the price step from the entry tier to the next tier (where most growth-stage teams end up), credits or sending limits that bottleneck heavy users, warmup tool subscriptions sold separately, deliverability monitoring add-ons, and any minimum-order constraints that inflate the entry point. Pull current pricing directly from the vendor pricing pages; both vendors update tiers quarterly in 2026.
Deliverability and sending infrastructure
For tools in the cold email infrastructure category, the upstream question is which underlying mailbox provider the sending traffic actually leaves from. Real Google Workspace and Microsoft 365 mailboxes inherit Google's and Microsoft's own IP reputation. Custom SMTP infrastructure does not. India-region Workspace tenants carry different region-level reputation signals from US or EU region tenants. If Apollo and Kaspr differ on this dimension, that single difference outweighs most of the feature comparison. For sending tools and lead data tools, the upstream question is whether the product gracefully connects via OAuth to real GWS / M365 mailboxes from a provider like Puzzle Inbox.
Integration friction with the existing stack
Most operators do not pick Apollo or Kaspr in isolation. The decision is shaped by what the rest of the stack already runs on. If the team is on Smartlead or Instantly for sending, the integration story is more important than any standalone feature comparison. If the team is on Apollo or Clay for data, the export and webhook compatibility matters more than the prospect database size. The right comparison framework is: "Which one breaks least when bolted onto our existing stack?" not "Which one has more features on a vendor demo deck?"
Support and incident response
Both Apollo and Kaspr have public support channels. The dimension that separates them is response time during a live incident — a deliverability drop mid-campaign, a sudden bounce-rate spike, an account suspension. Test this before signing by opening a real support ticket on a free trial or paid plan. The vendor that responds in hours instead of days is the one that survives contact with a real cold email operation.
Where Puzzle Inbox fits
Whichever of Apollo or Kaspr the team picks, the sending infrastructure layer is upstream of the tool decision. Puzzle Inbox provisions real Google Workspace and Microsoft 365 cold email mailboxes on dedicated tenants, ships pre-warmed inventory in 24 to 72 hours, and connects via OAuth (email + password) to every sending tool in this comparison. See the pricing page, Google Workspace plans, or Outlook 365 plans for current per-inbox numbers. Reviews follow our published editorial methodology.
Apollo vs Kaspr FAQ
Which is cheaper, Apollo or Kaspr?
The cheaper of Apollo and Kaspr at your specific seat count depends on the tier each vendor places you on. Pull current pricing from both vendor pricing pages on the same day and run the math at your actual user count, your actual sending volume, and your actual feature requirements. The cheaper headline number is often not the cheaper effective cost once add-ons and seat tiers are factored in.
Which has better deliverability, Apollo or Kaspr?
Deliverability is mostly a function of the sending mailbox provider (Google Workspace, Microsoft 365, or custom SMTP) rather than the tool layered on top. If Apollo and Kaspr both connect to real GWS or M365 mailboxes, the deliverability difference is small. If one of them is custom SMTP infrastructure and the other is real GWS / M365, the gap is large.
Can I switch between Apollo and Kaspr later?
Both vendors export contact data, campaign history, and reply data in standard formats. Migration friction is mostly in re-onboarding the team on the new UI rather than data portability. Budget a week for the switch.
What is a good alternative to Apollo and Kaspr?
The alternatives most cold email operators evaluate alongside Apollo and Kaspr live in the same category. See the tools directory for the full category list and the comparisons directory for related head-to-heads.
Related Reading
- Apollo vs ZoomInfo vs Clay: Which B2B Data Tool for Cold Email? — Comparing the three most popular B2B contact data platforms for cold email lead generation on accuracy, pricing, and features.
- Best Cold Email Inbox Providers in 2026: 10 Services Compared — We ranked and compared the 10 best cold email inbox providers on pre-warming, DNS quality, platform diversity, pricing, and support speed.
- The 8 Best Email Verification Tools for Cold Email in 2026 — The 8 best email verification tools ranked by accuracy, price, and speed. ZeroBounce, NeverBounce, MillionVerifier, and more compared.
- Best B2B Data Providers for Cold Email in 2026 (Ranked by Value) — The 8 best B2B data providers for cold email in 2026. Apollo, ZoomInfo, Cognism, Clay, and more ranked by value, accuracy, and use case.
- Cold Email Infrastructure Checklist: Everything You Need Before Sending Your First Email — The complete cold email infrastructure checklist for 2026. 15 items to verify before your first send so you don't burn domains or land in spam.
Ready to start sending?
Puzzle Inbox provisions pre-warmed Google Workspace and Outlook 365 cold email inboxes ready to send within 24-72 hours. See the pricing page, the how-it-works walkthrough, or the our-process page for full details. Comparisons follow our editorial methodology.