LeadMagic Review 2026: Is This B2B Data Enrichment API Right for You?

LeadMagic does one thing fast: it delivers verified emails, mobile numbers, and company data through an API built for developers and GTM engineers. Founded in 2022 by a sales leader frustrated with expensive databases and 20%+ bounce rates, the platform has grown to serve thousands of sales teams by prioritizing accuracy and pay-per-result pricing.

To write this LeadMagic review, we analyzed it extensively. We believe it's the right choice if:

• You need an API-first data enrichment tool for custom workflows

• You prioritize pay-per-result pricing over annual contracts

• You're a developer or GTM engineer building enrichment pipelines in Clay, Cursor, or similar tools

• You want strong mobile number coverage for cold calling campaigns

• Your enrichment needs center on contact discovery and email validation

However, LeadMagic might not be the best choice if:

• You need buyer intent signals, conversation intelligence, and sales execution in one platform

• You require AI-powered account prioritization and deal intelligence

• You want a single system connecting sales, marketing, and RevOps teams

• You need enterprise-grade compliance certifications and dedicated support

• Your GTM strategy demands more than data enrichment alone

In this case, consider ZoomInfo: an AI GTM platform built on a B2B dataset spanning 500M contacts, 100M companies, 135M+ verified phone numbers, and 200M+ verified business emails. That data fuels ZoomInfo's GTM Context Graph, an intelligence layer that unifies your CRM records, conversation transcripts, and behavioral signals with the 1.5B+ data points ZoomInfo processes daily, capturing not just what happened in your deals, but why. Your team can access this intelligence through the GTM Workspace for sellers, GTM Studio for marketers and RevOps, or APIs and MCP in any front-end.

We've included a detailed look at ZoomInfo at the end of this review as the broader alternative for teams that need data enrichment connected to a full GTM execution engine. If you're ready to explore ZoomInfo, you can start with a free trial here.

What is LeadMagic?

LeadMagic is a B2B data enrichment and contact discovery API founded in 2022 by Jesse Ouellette, a sales leader with 15 years running field sales teams at companies like DataRobot and BigID. The founding story is simple: Ouellette spent years watching expensive databases promise millions of contacts while delivering bounce rates over 20%. After being fired over a disagreement about email deliverability practices, he built a data provider focused on accuracy over volume.

The platform calls itself "The B2B Data API for AI Agents & GTM Engineers", offering verified emails, mobile numbers, company data, and web scraping through REST API, CLI, and MCP (Model Context Protocol) interfaces. LeadMagic claims 97% email accuracy, 99.9% uptime, and sub-200ms response times, with a credit-based pricing model where customers pay only for valid results.

The company is bootstrapped with $0 in external funding, reaching $1.2M in annual revenue by December 2024 with a team of 8 to 50 employees (sources vary). LeadMagic integrates with Clay, Apollo, ZoomInfo, Instantly, Cursor, Claude, n8n, Zapier, Make, and Salesforce, serving as a data layer that plugs into existing GTM workflows rather than replacing them.

LeadMagic Pros & Cons

LeadMagic Review: How it Works & Key Features

Email & Contact Enrichment: LeadMagic finds and verifies business emails through a multi-source matching system with a five-layer validation pipeline.

LeadMagic's core product is its email finding and validation system. You provide a first name, last name, and company domain. The platform queries multiple data sources simultaneously to locate the right email address. Every discovered email passes through a five-layer validation pipeline: syntax checks, domain verification, MX record validation, SMTP handshake, and deliverability scoring.

The Email Finder returns results in under 500ms for single lookups and costs 1 credit per valid email found, with no charge when no match is returned. The separate Email Validation tool verifies existing addresses at 0.25 credits per email (four validations per credit) with under 200ms median response times.

Source: LeadMagic

One notable capability is Catch-All Validation. Over 40% of enterprise companies configure their mail servers to accept all incoming addresses, meaning traditional SMTP verification cannot determine whether a specific mailbox exists. LeadMagic uses proprietary algorithms to resolve individual mailboxes within these catch-all domains to valid or invalid status, including domains protected by Proofpoint, Mimecast, and Barracuda.

The platform also includes a Personal Email Finder that locates Gmail, Outlook, and Yahoo addresses from a LinkedIn profile URL (2 credits per result), and a Profile Search endpoint that converts B2B profile URLs into structured professional data for 1 credit per profile.

Mobile Finder & Company Data: LeadMagic provides direct mobile numbers and firmographic data across 50M+ companies.

LeadMagic’s Mobile Finder locates direct mobile phone numbers for B2B contacts, requiring a LinkedIn URL plus either a work or personal email as input. It charges 5 credits only when a mobile number is found, with median response times around 300ms.

Source: LeadMagic

On company intelligence, Company Search returns 100+ data points per company (industry, employee count, revenue, headquarters, social profiles) for 1 credit per lookup. Company Funding provides funding history with investor lists, round amounts, and CEO information for 4 credits. Technographics identifies a company's technology stack for 1 credit per company. The platform covers 50M+ companies globally across 100+ countries.

Intent Signals & Developer Tools: LeadMagic tracks hiring signals, ad activity, and job changes, while offering CLI and MCP access for AI-native workflows.

LeadMagic's intent signals cover three data types. Jobs Data tracks over 10 million active job postings with daily refreshes, costing 1 credit per job returned. Ads Intelligence monitors advertising presence across Google, Meta, and B2B platforms for 5 million+ companies at 0.2 credits per search. The Job Change Detector tracks employment transitions with 95% accuracy within 7 days across 100 million+ profiles for 3 credits per request.

Where LeadMagic separates itself from traditional data providers is developer tooling. The CLI (launched February 2025) installs via a single bash command and provides 19 commands for file operations, enrichment, and queries, with an AI chat interface for natural language workflow orchestration. All data stores locally in a SQL database for offline querying.

Source: LeadMagic

The MCP Server (launched February 2026) exposes 16 enrichment tools that AI assistants can call mid-conversation, supporting 13 AI clients including Cursor, Claude Desktop, VS Code, and ChatGPT. A URL to Markdown converter reduces raw HTML to clean markdown with 67% fewer tokens, targeting LLM and RAG pipeline use cases.

Source: LeadMagic

Pricing: LeadMagic uses credit-based pricing starting at $59.99/month with no annual contracts.

LeadMagic operates on a credit-based model across seven tiers:

Credits roll over on Essential plans and above, with no caps as long as the subscription stays active. The Basic plan does not include rollover. All paid plans include full API access, CLI and MCP access, all enrichment endpoints, and team features.

Different enrichment types cost different amounts: email validation costs 0.25 credits, email finding costs 1 credit, mobile finding costs 5 credits, and job change detection costs 3 credits. Credits are only deducted when enrichment succeeds.

Additional credits can be purchased through Auto Top-Up or Manual Top-Up, though top-up credits cost more than subscription credits. LeadMagic maintains a no-refund policy where all purchases are final.

Where LeadMagic Falls Short

LeadMagic's focus on API-first data enrichment produces a product that does its narrow job well. But several limitations emerge for teams whose needs extend beyond contact discovery.

Data Enrichment Without Intelligence: LeadMagic tells you who works where and how to reach them. It does not tell you which accounts are worth reaching, when they're in-market, or why a deal is moving. There's no buyer intent scoring, no account prioritization, no deal intelligence. Teams using LeadMagic still need separate tools (or manual judgment) to decide which enriched contacts to pursue.

No Sales Execution Layer: Once you've found an email or mobile number, LeadMagic's job is done. There's no outreach sequencing, no conversation intelligence, no CRM with deal tracking. You export data to separate platforms for every step after enrichment, creating handoff points where context gets lost.

Interface Needs Work: G2 reviewers note that "the interface could benefit from further improvements". The web dashboard lags behind the API and CLI in polish and usability. For teams without developers, the experience may feel incomplete.

Customer Support Gaps: Some users report "long delays in responses" from customer support. One reviewer described issues with promised free credits that never arrived. Another reported being charged for months when the product was not in use. For a platform businesses depend on for pipeline generation, inconsistent support creates real risk.

Limited Enterprise Readiness: LeadMagic mentions SSO/SAML and custom SLAs for enterprise customers, but specific security certifications like SOC 2 Type II appear in marketing without verification on the actual security page. The company has no formal analyst recognition from Gartner or Forrester, which enterprise procurement teams often require.

Accuracy Isn't Perfect: While accuracy is a strength overall, G2 users acknowledge that "like all data enrichment tools it doesn't get everything right 100% of the time". Some users report a high failure rate for contact information provided, suggesting results vary by market and segment.

These limitations reflect LeadMagic's design choices: build a focused enrichment API, keep it fast and cheap, and let customers handle everything else with other tools. For teams that want their data connected to intelligence, execution, and orchestration, that design creates gaps a broader platform can fill.

Top LeadMagic Alternative for Full GTM Execution: ZoomInfo

ZoomInfo addresses LeadMagic's gaps by providing not just data enrichment but the full go-to-market infrastructure around it. Where LeadMagic delivers contacts and company data, ZoomInfo connects that data to buyer intent, conversation intelligence, AI-powered outreach, and multi-channel campaign orchestration in one platform.

The Most Comprehensive B2B Data: ZoomInfo operates the largest verified B2B dataset in the industry.

ZoomInfo's data covers 500M contacts, 100M companies, 135M+ verified phone numbers, 120M direct-dial phone numbers, and 200M+ verified business email addresses. That scale is maintained through a multi-source verification pipeline: automated ML scanning of 28 million site domains daily, third-party partner data covering 95 million businesses, and an in-house Data Training Lab of 300+ human researchers.

The data reaches up to 95% accuracy on first-party data. In a Fortune 500 competitive RFP analyzing 25 million contacts across vendors, an independent consultant concluded that "no other competitor came even close."

Beyond contacts and companies, ZoomInfo covers dimensions LeadMagic doesn't touch at scale: buyer intent data from 210 million IP-to-Organization pairings and 6 trillion+ new keyword-to-device pairings sourced monthly, technographic profiles of 30+ million companies tracking 30,000+ technologies, and website visitor identification that resolves anonymous traffic to companies and contacts.

The GTM Context Graph: ZoomInfo's intelligence layer captures why deals move, not just what happened.

The GTM Context Graph is what separates ZoomInfo from a data provider. It processes 1.5B+ data points daily, unifying ZoomInfo's B2B data with a customer's CRM records, conversation transcripts from Chorus (ZoomInfo's conversation intelligence engine), email threads, and behavioral signals into one intelligence layer.

The practical difference: a data enrichment tool can tell you the CFO's email address. The GTM Context Graph can tell you the CFO joined the last call, asked about six-month ROI (captured by Chorus), and that this pattern of executive sponsorship at this deal stage correlates with closed-won outcomes in your segment. That reasoning flows into every downstream action, from the follow-up email addressing the CFO's specific concern to the forecast reflecting actual buying evidence rather than stage labels.

As ZoomInfo's Chief Product Officer Dominik Facher writes: "The CRM recorded the state change. It has no record of why it happened." The GTM Context Graph captures that "why" by connecting entities, signals, conversations, and outcomes into a graph where AI can reason about go-to-market decisions.

Universal Access: ZoomInfo delivers intelligence through native products, APIs, and MCP for any tool.

ZoomInfo's intelligence is available through three channels:

GTM Workspace gives sellers a single screen where prioritized accounts, AI-drafted outreach, and deal execution converge. AI agents handle account research, follow-up generation, signal monitoring, and CRM updates. Seismic's sales team boosted productivity by 54% and saved 11.5 hours per week, attributing 39% of pipeline to ZoomInfo signals.

GTM Studio gives marketers, RevOps, and GTM engineers an AI-powered canvas where audience definition, campaign orchestration, and pipeline measurement happen in natural language. Expansion plays that took 3 weeks now launch in 30 minutes, without engineering support. GTM Studio also includes waterfall enrichment from 25+ alternative data sources at no additional cost.

APIs and MCP expose the same intelligence to any custom agent, internal tool, or partner platform. The Enterprise API spans search, enrich, AI intelligence, marketing audiences, and engagement data endpoints. The ZoomInfo MCP server connects AI models to ZoomInfo's data through natural language, currently supporting Claude and ChatGPT. All three channels draw from one GTM Context Graph, so where you work never limits the intelligence available.

Enterprise-Grade Pricing and Compliance: ZoomInfo offers a free tier, custom enterprise pricing, and certified security.

ZoomInfo provides two free entry points: ZoomInfo Lite, a permanent free tier with access to the B2B database, 10 monthly export credits, Chrome extension, mobile app, and HubSpot integration; and a 7-day free trial of the full platform.

Paid plans use a custom-quoted, seat-and-credit-based subscription model across Sales, Marketing, and Operations product lines. Pricing depends on users, credit volume, features, and contract terms. ZoomInfo does not publish dollar amounts for paid tiers.

On security, ZoomInfo maintains ISO 27001, ISO 27701, SOC 2 Type II, TRUSTe GDPR, and TRUSTe CCPA certifications, all renewed annually. The company is a registered data broker in California and Vermont. For regulated industries and enterprise procurement, this certification stack is often a baseline requirement.

LeadMagic or ZoomInfo: Comparison Summary

Final Verdict

The choice between LeadMagic and ZoomInfo depends on whether you need a data enrichment tool or a GTM execution platform.

Choose LeadMagic if:

• You’re a developer or GTM engineer building custom data workflows

• You need fast, accurate contact data delivered via API

• You want to plug enrichment directly into tools like Clay or Cursor

• You manage your own sales execution, intent data, and campaign orchestration stack

• You prefer pay-per-result pricing instead of fixed subscription costs

• You want unused credits to roll over month-to-month

• You value flexibility without long-term contracts

• Your priority is reliably piping verified emails and mobile numbers into your system

Plug high-quality contact data directly into your workflows with LeadMagic.

Choose ZoomInfo if:

• Your team needs more than just contact data

• You want to identify which accounts are actively in-market

• You need visibility into why deals move forward or stall

• Your outreach is driven by behavioral signals and conversation intelligence

• You want guidance on when to engage, what to say, and how to approach buyers

• You’re looking to connect data, intelligence, and execution in one platform

• Your GTM motion spans the full sales and marketing lifecycle

• You’re building a unified operating system for your entire go-to-market strategy

Go beyond data and run your entire go-to-market strategy on ZoomInfo’s intelligence-driven platform.

LeadMagic built a sharp tool for a specific job. ZoomInfo built the workshop. Your choice depends on whether you need one tool or the whole system.