Leadsets vs ZoomInfo: which B2B data source fits your agent

The short version

Leadsets and ZoomInfo overlap in one place: both let an AI agent search and enrich B2B contacts through a remote MCP server and an API. Beyond that, they are different kinds of products. ZoomInfo is a large go-to-market intelligence company with a contact database, intent and signal data, and sales, marketing and recruiting software, now also sold self-serve as GTM.ai by ZoomInfo. Leadsets is a B2B data API and MCP server built for agents, with eight tools for people and company search, enrichment, email verification and company website scraping, sold on flat monthly plans.

If you need phone numbers, a large established database, intent data or SOC and ISO attestations today, ZoomInfo is the stronger fit. If you want predictable monthly cost for agent-driven prospecting with verified work emails, Leadsets is built for that job.

Pricing: flat plans versus quotes and credits

Leadsets publishes all of its prices. Free is 1,000 records, one time, with no card. Paid plans are Solo $29, Pro $99, Team $399 and Max $999 a month (USD), with no credits and no per-record bill. Each plan has fair-use limits per rolling five hours and per week; Solo, for example, allows 1,000 enrichments and 500 search records every five hours, and 5,000 enrichments a week. Records count only when data comes back. Website scraping is an add-on in units: $9 for 1,000, $19 for 5,000 and $49 for 20,000. Full limits are on the pricing page.

ZoomInfo has two routes. Its main platform (SalesOS, MarketingOS and others) is priced by custom quote, and ZoomInfo does not publish seat, credit or contract terms. Third-party data from Vendr, based on 1,581 purchases, puts the median at $33,500 a year, with a range of $7,267 to $156,000. Third-party sources also describe annual contracts that auto-renew unless written notice is given. The second route is GTM.ai by ZoomInfo, which is self-serve:

• Free: 1,000 data credits and 1,000 AI credits at signup, no card, expiring after 12 months.
• Pay as you go: top-ups from $20, data credits at $0.38 each at the $1,000 spend tier, AI credits at $0.05 each.
• Enterprise: annual volume pricing, not published.

More detail is in our ZoomInfo pricing explainer. The practical difference: Leadsets costs the same each month whatever the agent does inside its limits, while ZoomInfo self-serve cost scales with credits used and platform cost depends on a negotiated contract.

Data, coverage and email verification

ZoomInfo says it has 410M+ contact profiles, 300M+ verified business emails, 135M+ direct dial numbers and over 95% accuracy, across 122.9 million companies; other ZoomInfo pages give different counts. It says its sources include a contributory network that reads email signatures, machine learning over websites, filings and job posts, human researchers and partners, with continuous refresh. Intent data is a separate SKU.

Leadsets does not quote a database size. It uses licensed suppliers and public sources it is permitted to use, never data from behind a login, and re-checks every record at least monthly. Each field carries its source, last-checked date and confidence. Coverage is work emails, roles and company data, plus US personal emails on paid plans. There are no phone numbers yet.

On verification, ZoomInfo describes syntax, domain and MX, SMTP and risk checks for catch-all, disposable and role-based addresses, cites NeverBounce, and says it uses actual delivery attempts against catch-all domains. Per-email confidence scores are not published. Leadsets runs a verification waterfall: syntax, DNS and MX checks, a mailbox-level check, then a second verifier for uncertain or catch-all results. Every email is labelled verified, catch-all, unknown or invalid with a confidence score, and uncertain results are never rounded up to valid.

Agents, MCP and API

Both have an official remote MCP server. ZoomInfo's is at mcp.zoominfo.com and works with Claude, ChatGPT, Perplexity, Cursor, Codex and VS Code Copilot. It requires a ZoomInfo licence (GTM.ai self-serve or Enterprise), and ZoomInfo says data accessed via MCP may not be used for model training. ZoomInfo also offers a Data API, Context API, Agent and Copilot APIs, webhooks and a CLI; API access depends on package, and rate limits and language SDKs are not published.

Leadsets runs at https://mcp.leadsets.ai and works with Claude, ChatGPT, Cursor and any MCP client; in Claude it connects over OAuth with no key to paste (setup guide). The same eight tools are REST endpoints at https://api.leadsets.ai/v1 with TypeScript and Python SDKs, idempotency keys and Retry-After headers. A free get_usage tool lets the agent check what is left before a run, and scrape_company and scrape_jobs add website profiles and hiring signals.

On integrations ZoomInfo is broader. It lists 194, including bi-directional Salesforce, HubSpot, Salesloft and Zapier, and warehouse delivery to Snowflake, Databricks, BigQuery and S3. Leadsets connects to HubSpot, Salesforce, Pipedrive and Attio through skills and the API, and to n8n, Clay and Make over HTTP.

An example: a weekly list from Claude

Maya Chen runs revenue operations at Northwind Analytics (northwind.co). Each week she wants Claude to find 300 VP-level sales leaders at US SaaS companies with 50 to 200 people, with verified emails, and push them to her sequencer. Her team does not call prospects.

With Leadsets on Solo at $29 a month, that run fits inside the weekly limits of 2,500 search records and 5,000 enrichments, and catch-all addresses come back as their own segment so she can send to them at lower volume. If Northwind later adds a calling motion, Maya would need direct dials and mobile numbers, which Leadsets does not offer. ZoomInfo says it has 135M+ direct dials, with mobile data on GTM.ai Enterprise, so at that point ZoomInfo is the better fit for her.

When to choose Leadsets

• You want Claude, ChatGPT, Cursor or your own agent to build prospect lists with verified work emails by itself, over MCP or REST.
• You want a flat monthly price from $29 with visible limits instead of credits or an annual contract.
• You want honest email labels and a source and checked date on every field.
• You want hiring signals and company website profiles from the same API key.
• Your security review can accept that SOC 2 Type I is planned (target Q3 2027) rather than complete. See compliance.

When to choose ZoomInfo

• You need phone numbers: ZoomInfo says it has 135M+ direct dials, and Leadsets has none yet.
• You want a large, established database plus intent and signal data.
• Your procurement requires SOC and ISO attestations today.
• You rely on many native integrations or warehouse delivery to Snowflake, Databricks, BigQuery or S3.
• Your company already has a ZoomInfo licence, which covers its MCP server.

If neither fits, see our list of ZoomInfo alternatives.

Questions and answers

Is Leadsets cheaper than ZoomInfo?

Leadsets publishes flat plans from $29 a month with no credits. ZoomInfo does not publish platform prices; third-party Vendr data puts the median at $33,500 a year. ZoomInfo's self-serve GTM.ai charges per credit, with data credits at $0.38 each at the $1,000 spend tier, so cost depends on usage.

Does ZoomInfo have an MCP server?

Yes. ZoomInfo runs an official MCP server at mcp.zoominfo.com for Claude, ChatGPT, Perplexity, Cursor, Codex and VS Code Copilot. It requires a ZoomInfo licence, either GTM.ai self-serve or Enterprise.

Does Leadsets have phone numbers?

Not yet. Leadsets returns work emails, roles, company data and US personal emails on paid plans. It says it will add phone numbers only once sourcing rights and costs are clear, so teams that call prospects should look at providers such as ZoomInfo.

How much does ZoomInfo cost?

ZoomInfo prices its main platform by custom quote and does not publish list prices. Third-party Vendr data from 1,581 purchases shows a median of $33,500 a year and a range of $7,267 to $156,000. GTM.ai by ZoomInfo has a free tier and pay-as-you-go top-ups from $20.

Is there a free version of ZoomInfo?

Yes. GTM.ai by ZoomInfo Free gives 1,000 data credits and 1,000 AI credits at signup with no card, expiring after 12 months, and includes MCP, API and CLI access. ZoomInfo Lite is also free, but ZoomInfo does not publish its credit allowance.

Is Leadsets SOC 2 certified?

Not yet. Leadsets has SOC 2 Type I readiness work underway with a target of Q3 2027 and says it will post the report only once it exists. It runs a GDPR-aligned program with a DPA and standard contractual clauses.

Sources · checked 2026-11-09

• ZoomInfo pricing
• GTM.ai by ZoomInfo pricing
• ZoomInfo contact and company search
• ZoomInfo global coverage
• How ZoomInfo gets its data
• ZoomInfo email accuracy and verification
• ZoomInfo MCP docs
• ZoomInfo integrations
• ZoomInfo trust center
• Vendr ZoomInfo pricing data (third-party)

Prices and features change. If something here is out of date, email support@leadsets.ai and we'll fix it.

Go deeper

• ZoomInfo alternatives
• ZoomInfo pricing explained
• Apollo vs ZoomInfo
• B2B data APIs for AI agents
• What is an MCP server

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