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Use cases · Email Verification APIs

Best Email Verification APIs with Data Enrichment

Verifiers that also return enrichment - name, company, or related data - alongside the deliverability verdict, so one call both validates and enriches.

Required capability: Data enrichment.

Our pick: ZeroBounce

Accurate, fast and secure email verification service

Best for: Prototypes and side projects - free to start, no sales call; Regulated or enterprise workloads - compliance attestations and an enterprise plan; AI agents and automation - an agent-ready surface (MCP / llms.txt).

ZeroBounce profile →

Best for…

Best overall
ZeroBounce - our default pick: strongest across pricing, trust and breadth
Best free pick
ZeroBounce - free tier: 100 free monthly email verifications, 10 free Email Finder queries, 1 Email Inbox Placeme…
Best for enterprise
ZeroBounce - for regulated or large teams: SOC 2 Type II, HIPAA, published SLA
Best for agents
ZeroBounce - easiest to wire up programmatically: MCP server + llms.txt
Broadest surface
Hunter - 31 documented actions; breadth isn't quality, but it's the most to build on

Ranked (3)

  • #1 ZeroBounce

    85 / 100
    • Best overall
    • Best free pick
    • Best for enterprise
    • Best for agents

    Accurate, fast and secure email verification service

    PricingUsage · from $39 2,000 emails · free tier ✓
    TrustSOC 2 Type II · HIPAA · GDPR · ISO 27001 · PCI DSS
    Does
    • Real-time / single
    • Bulk / list
    • Catch-all detection
    • Disposable detection
    • Role-account detection
    • Spam-trap detection
    • SMTP / mailbox check
    • Quality scoring
    • Data enrichment
    • Native integrations
    Used byAirbnb, Intel, LinkedIn, Samsung

    ZeroBounce profile →

  • #2 Hunter

    74 / 100
    • Broadest surface

    A free email checker to instantly spot risky or fake email addresses. Verify emails with thorough checks: format, domain information, servers response, accept-all.

    PricingHybrid · from $49 month · free tier ✓
    TrustGDPR
    Does
    • Real-time / single
    • Bulk / list
    • Catch-all detection
    • Disposable detection
    • Role-account detection
    • Quality scoring
    • Data enrichment
    • Native integrations
    Used bySemrush, Vimeo, Cisco, Canva
    The catchVerification is a secondary feature: Hunter is built for finding and prospecting emails, not bulk list hygiene.

    Hunter profile →

  • #3 Clearout

    61 / 100

    Clearout is a real-time data quality engine that helps sales, marketing, customer success, product, and operations (Go-To-Market) teams maintain their contact data in a clean, accurate, and conversion-ready state.

    PricingHybrid · from $21 3,000 credits · free tier ✗
    TrustSOC 2 Type II · GDPR · ISO 27001
    Does
    • Real-time / single
    • Bulk / list
    • Catch-all detection
    • Disposable detection
    • Role-account detection
    • Quality scoring
    • Data enrichment
    • Native integrations
    Used bySigParser, Pearl Lemon, Logic Inbound
    Avoid ifYou want to try it free before paying

    Clearout profile →

Scope: only APIs with the required capability, picked from published, cited data. The score is one input, not the verdict, and we lead with each one’s trade-off. No reviews yet, no paid placement. See the full Email Verification APIs directory.