Chief Revenue Buddy
Best Prospecting & data

Best prospecting and data tools

The prospecting and data tools worth building on if your stack runs on Claude, ChatGPT, or Gemini. Ranked on score and agent access.

21
Tools ranked
16
MCP-ready
12
With free plan
$19/mo
Starting from

Updated July 2026 · Independent, no sponsored rankings

How to pick a prospecting tool in 2026

Prospecting used to mean buying a list and dialing through it. Now it is a pipeline: find accounts that match a signal, enrich the right contacts, research each one, then hand a clean, current list to your outreach. The tools that win in 2026 are the ones that feed that pipeline automatically instead of making a rep copy-paste between five tabs.

Two things separate the contenders. The first is data quality where you actually sell, because a database that is 90 percent accurate for US tech can be 50 percent accurate in EMEA. The second is whether an agent can drive the tool. A provider with a clean API and an MCP server lets you ask Claude to "build a list of Series B fintech VPs hiring SDRs and enrich their emails" and get a usable result. One with a closed export model leaves you doing it by hand.

What CR Buddy weighted

Chief Revenue Buddy scored each tool on four things: data accuracy and coverage for real ICPs, fit for the modern signal-based motion, real pricing including how credits are consumed, and the depth of its API and agent support. The ranking leads with editorial score and uses AI-stack fit as the tie-breaker.

The short version

Clay is the pick if you want to build a prospecting system, not just pull a list. It chains 100-plus providers with AI research in one workflow, and nothing else is as AI-native. Apollo.io is the best value entry point, bundling a large database with sequencing in one cheap platform, as long as you verify data outside US tech. Crustdata is the developer's choice, an API-first feed of company and people signals built for agent-driven prospecting.

If you sell into Europe and live on the phone, also weigh Cognism for phone-verified EMEA data. If data sovereignty is a real constraint for your buyers, the directory of European, GDPR-compliant software maps the EU-native options worth checking before you commit to a US data vendor. Whichever you pick, run a test batch against your own ICP before you commit budget. Every data vendor looks great in the demo.

If your bottleneck is narrower, just finding and verifying a specific person's email rather than building full account lists, a dedicated finder is cheaper and faster to evaluate than a full platform. Hunter.io is the strongest of that group, the only one shipping an official MCP server on top of a mature API. Icypeas is close behind on AI-stack fit with its own vendor-hosted MCP server. Snov.io, Findymail, Anymail Finder, and Skrapp.io round out the category at lower price points, worth comparing on data coverage for your specific ICP before you commit.

Top picks at a glance

#ToolBest forFromScore
1Clay logoClayGTM engineers and ops-minded sellers building…Free9.0
2Apollo.io logoApollo.ioFounders and small teams who want data plus s…Free8.3
3Crustdata logoCrustdataGTM engineers building automatedFrom ~$99/mo8.2
4Unify logoUnifyHigh-growth SaaS teams running signal-based w…Free8.0
5ZoomInfo logoZoomInfoMid-market and enterprise GTM teams with budg…Custom7.9
6People Data Labs logoPeople Data LabsTeams building their own enrichment or agent-…Free plan7.9
7Amplemarket logoAmplemarketOutbound teams that want one AI-native platfo…From $600/mo7.9
8Cognism logoCognismOutbound teams selling into Europe who need a…Custom7.8
9Hunter.io logoHunter.ioTeams that want a trustedFree7.7
10LeadIQ logoLeadIQReps who want data capture and first-draft pe…Free7.6
11Pocus logoPocusPLG and modern GTM teams acting on product an…Custom7.6
12Lusha logoLushaIndividual reps and small teams who want quickFree7.4
13Icypeas logoIcypeasGTM teams that want a realFrom $19/mo +VAT7.4
14Aomni logoAomniAEs and ABM teams who need rich account intel…Free; Pro $300/month7.4
15Snov.io logoSnov.ioSmall teams who want prospectingFree7.3
16Ocean.io logoOcean.ioABM and demand teams refining their ideal-cus…$79/month7.2
17Findymail logoFindymailTeams that want high-confidence verified emai…From $99/mo7.2
18Anymail Finder logoAnymail FinderTeams who want to pay only for emails that co…From €26/mo7.0
19Expertise AI logoExpertise AISDR and RevOps teams who want proven GTM play…Free7.0
20Seamless.AI logoSeamless.AITeams that want high-volume contact discovery…Free plan6.9
21Skrapp.io logoSkrapp.ioIndividual reps and small teams doing LinkedI…Free6.6
Clay logo
#1

Clay

Top pick

Best for: GTM engineers and ops-minded sellers building automated prospecting systems.

9.0
87AI-stack fitOfficial MCP serverREST APIFree plan14-day trial
Clay product screenshot

A spreadsheet that runs your prospecting. The most AI-native tool in GTM.

Clay ships a first-party MCP server (clay.com/mcp, a 21-tool GTM server for Claude, ChatGPT, and Codex) on top of an Enterprise-tier REST HTTP API and webhooks, so assistants can drive Clay directly. It is also AI-native in-workflow with built-in Claude and GPT calls per row.

The verdict: If you're serious about AI-driven outbound, Clay is close to essential.

What's good

  • Chains 100+ data providers with AI in one workflow, waterfall enrichment that actually works
  • Built for the AI-native motion: prompt-based research at scale
  • Replaces a stack of point tools for list-building and enrichment

What's not

  • Credit-based pricing is hard to predict
  • Steep learning curve, this is a power tool

Pricing

Free, paid from ~$149/mo (billed annually)

Apollo.io logo

Best for: Founders and small teams who want data plus sending without buying two tools.

8.3
85AI-stack fitOfficial MCP serverREST APIFree plan
Apollo.io product screenshot

A B2B database and an engagement engine bolted together.

Apollo ships its own official MCP server (Apollo MCP) with around 45 tools and OAuth setup in Claude, ChatGPT, and Perplexity, available on all plans. A public REST API also exposes search, enrichment, and sequences, so agents can build lists and enrich records programmatically, though rate limits bite on big pulls.

The verdict: The best value entry point for outbound when budget is tight.

What's good

  • Huge contact database bundled with sequencing, so one tool covers find + reach
  • Aggressive free plan that's great for testing
  • REST API for pulling contacts into your own workflows

What's not

  • Data accuracy varies by region and seniority
  • The all-in-one breadth means no single piece is best-in-class

Pricing

Free, paid from ~$49/user/mo (billed annually)

Crustdata logo

Best for: GTM engineers building automated, signal-driven prospecting.

8.2
86AI-stack fitOfficial MCP serverREST API14-day trial
Crustdata product screenshot

Real-time company and people data via a clean API.

Crustdata ships an official hosted MCP server at mcp.crustdata.com (OAuth 2.1 with Dynamic Client Registration, 23 tools across company, people, jobs, posts, and watchers) with documented Claude and Claude Code setup. Crustdata is also built API-first on a single versioned REST surface (Bearer auth, x-api-version header) for firmographic and signal data.

The verdict: If you're coding your outbound, Crustdata is one of the best data APIs going.

What's good

  • API-first; a favorite for building AI prospecting agents
  • Fresh headcount, hiring, and signal data

What's not

  • Developer-oriented, not a point-and-click tool
  • Usage-based costs need monitoring

Pricing

From ~$99/mo (usage-based)

Unify logo

Best for: High-growth SaaS teams running signal-based warm outbound.

8.0
66AI-stack fitNo MCP server yetREST APIFree plan14-day trial
Unify product screenshot

Warm outbound on autopilot: intent signals plus AI sequencing agents.

Unify exposes an open API plus webhooks on the Business tier (Analytics, Data, and Bulk APIs) and read-write CRM sync, but it is built on OpenAI's stack with no MCP server, so agents integrate over REST rather than natively.

The verdict: One of the cleanest warm-outbound platforms, if you can model the credits.

What's good

  • Signal-triggered warm outbound and sequencing in one workflow
  • Large built-in data layer (1.1B+ people, 65M+ companies)
  • Genuinely usable free tier to start

What's not

  • Credit system makes monthly costs hard to predict
  • CRM write-back is gated to the Business tier; no MCP

Pricing

Free, paid from $20/seat/mo (billed monthly)

ZoomInfo logo

Best for: Mid-market and enterprise GTM teams with budget for premium data.

7.9
84AI-stack fitOfficial MCP serverREST API
ZoomInfo product screenshot

The enterprise B2B data platform, now with Copilot AI.

ZoomInfo ships an official MCP server (the ZI API MCP, documented at docs.zoominfo.com) so agents can query the database in natural language, backed by a REST API for search and enrichment. Both the MCP server and the API are gated behind enterprise plans, so access requires a paid contract.

The verdict: The heavyweight data platform; powerful, but priced for serious teams.

What's good

  • Deep firmographic and intent data at scale
  • Copilot surfaces accounts and writes outreach

What's not

  • Expensive, opaque annual contracts
  • Overkill for small teams

Pricing

Custom (annual contracts)

People Data Labs logo

Best for: Teams building their own enrichment or agent-driven prospecting.

7.9
80AI-stack fitCommunity MCP serverREST APIFree plan
People Data Labs product screenshot

Person and company data as a developer-first API.

People Data Labs is a pure data API with documented REST endpoints (Person Enrichment, Company Search, IP Enrichment and more) and OpenAPI specs. There is no vendor-shipped MCP server; agent access today goes through community MCP wrappers like the open-source phxdev1 server or by calling the REST API directly.

The verdict: A foundational data API for anyone constructing custom GTM tooling.

What's good

  • Massive person/company datasets via a clean API
  • Built for enrichment pipelines at scale

What's not

  • Raw data API, not an end-user app
  • Requires engineering to operationalize

Pricing

Free plan, then Pro from $98/mo (billed monthly) or $940/yr

Amplemarket logo

Best for: Outbound teams that want one AI-native platform instead of a stack.

7.9
86AI-stack fitOfficial MCP serverREST API
Amplemarket product screenshot

An AI-native sales platform: data, sending, and a copilot.

Amplemarket ships an official vendor-operated remote MCP server at mcp.amplemarket.com/mcp (OAuth 2.0) that lets Claude, ChatGPT, and Cursor connect to an account directly. It also exposes a JSON REST API with bearer-token auth covering contacts, sequences, lead lists, calls, tasks, mailboxes, and users.

The verdict: A genuinely AI-native outbound platform if you can fit the pricing.

What's good

  • Combines data, multichannel sending, and AI (Duo) in one platform
  • Strong deliverability and intent signals

What's not

  • Custom pricing, aimed at funded teams
  • All-in-one means less best-of-breed depth

Pricing

From $600/mo (billed annually)

Cognism logo

Best for: Outbound teams selling into Europe who need accurate phone data.

7.8
74AI-stack fitCommunity MCP serverREST API
Cognism product screenshot

Phone-verified B2B data with strong EU coverage.

Cognism ships an official REST API (Search, Enrich, and Redeem endpoints with Bearer-token auth) for enrichment and integrates with major CRMs. There is no vendor-built MCP server, but community connector-platform MCP servers for Cognism Prospector exist via Zapier and viaSocket, so agents can reach Cognism through those or the REST API directly.

The verdict: The data pick for EMEA-focused outbound, especially for dialing.

What's good

  • Diamond-verified mobile numbers, strong in EMEA
  • GDPR-conscious data sourcing

What's not

  • Custom pricing only
  • Credits and packaging can be confusing

Pricing

Custom (annual)

Hunter.io logo

Best for: Teams that want a trusted, well-documented email finder with a real path for AI agents.

7.7
80AI-stack fitOfficial MCP serverREST APIFree plan
Hunter.io product screenshot

The email finder standard, now with an official MCP server.

Hunter ships its own official MCP server (hunter-io/hunter-mcp on GitHub, also detailed on Hunter's blog) that lets Claude and other MCP clients search domains, verify emails, and manage leads directly. That sits on top of Hunter's well-documented REST API v2.

The verdict: The default choice for domain-based email finding, and one of the few finders with a vendor-built MCP server.

What's good

  • Free plan with 50 credits/mo and no card required
  • Official Hunter MCP server (hunter-io/hunter-mcp) for direct agent access
  • AI Assistant and Discover search layered onto a solid domain search core

What's not

  • Monthly credit pool can run out fast on Discover-heavy workflows
  • Sequencing features trail dedicated engagement platforms

Pricing

Free (50 credits/mo), paid from €34/mo (billed annually)

LeadIQ logo

Best for: Reps who want data capture and first-draft personalization together.

7.6
85AI-stack fitOfficial MCP serverGRAPHQL APIFree plan
LeadIQ product screenshot

Prospecting data plus AI-written outreach in one flow.

LeadIQ ships its own official MCP connector (the LeadIQ MCP server), so assistants like Claude and ChatGPT can drive prospecting and enrichment directly. It also exposes a public GraphQL API at api.leadiq.com/graphql with search queries and list mutations, plus deep CRM and sequencer integrations.

The verdict: A tidy bridge between finding a prospect and writing the first touch.

What's good

  • Capture contacts to CRM in a click
  • Scribe AI drafts personalized messages from signals

What's not

  • Database smaller than the big data vendors
  • AI copy still needs editing

Pricing

Free, paid from $200/mo (credit-based, up to 5 users)

Pocus logo

Best for: PLG and modern GTM teams acting on product and intent signals.

7.6
48AI-stack fitNo MCP server yet
Pocus product screenshot

Signal-based selling that turns product and intent data into pipeline.

Pocus connects through warehouse and CRM integrations but ships no documented public API and no MCP server (none in the MCP registry and no community server), so Pocus cannot be driven by an external agent.

The verdict: A leading platform for signal-based, prioritized selling.

What's good

  • Unifies product, intent, and CRM signals for prioritization
  • Built for PLG and signal-based GTM

What's not

  • Best for product-led or signal-rich motions
  • Custom pricing

Pricing

Custom (annual)

Lusha logo

Best for: Individual reps and small teams who want quick, cheap contact data.

7.4
85AI-stack fitOfficial MCP serverREST APIFree plan
Lusha product screenshot

Simple, self-serve B2B contact data with a free tier.

Lusha ships an official vendor-built MCP server, available as a local server (lusha-oss/lusha-public-api-mcp) and a managed remote endpoint at mcp.lusha.com, backed by a RESTful V3 API with Person, Company, and Prospecting endpoints. Agents can drive Lusha through MCP directly or via the documented REST API.

The verdict: An easy on-ramp to prospecting data without an enterprise contract.

What's good

  • Easy to start with a usable free plan
  • Clean Chrome extension and CRM pushes

What's not

  • Coverage thinner outside core markets
  • Credit limits on lower tiers

Pricing

Free, paid from $37.45/user/mo (billed annually)

Icypeas logo

Best for: GTM teams that want a real, vendor-built MCP path into their email-finding data.

7.4
78AI-stack fitOfficial MCP serverREST API
Icypeas product screenshot

A credit-rollover email finder with its own official MCP server.

Icypeas ships its own official, vendor-hosted MCP server at mcp.icypeas.com with 21 tools spanning email discovery, verification, bulk search, and company/people lookup, documented for both Claude and ChatGPT. That sits on top of a REST API with native Zapier, Make, and n8n integrations.

The verdict: The most agent-ready pure email finder in this set, thanks to an official MCP server instead of a bolted-on wrapper.

What's good

  • Official, vendor-built MCP server (mcp.icypeas.com), not a third-party wrapper
  • Credits never expire and roll over indefinitely
  • Cheapest per-email cost of this group at higher volumes (~$0.005/email on Hypergrowth)

What's not

  • Smaller brand with less independent review coverage than Hunter or Snov.io
  • Listed prices exclude VAT for EU customers

Pricing

From $19/mo +VAT (1,000 credits, billed monthly)

Aomni logo

Best for: AEs and ABM teams who need rich account intelligence fast.

7.4
42AI-stack fitNo MCP server yetFree plan
Aomni product screenshot

An AI research agent for account intelligence and prep.

Aomni has no MCP server and is not listed in the official MCP registry, so assistants like Claude cannot drive it directly. It also publishes no public REST or GraphQL API; only native app integrations are offered, so custom programmatic access is not available.

The verdict: A sharp research agent for teams that sell into complex accounts.

What's good

  • Deep automated account research and battlecards
  • Saves hours of pre-call prep

What's not

  • Research focus, not a full sending engine
  • Custom pricing

Pricing

Free; Pro $300/month

Snov.io logo

Best for: Small teams who want prospecting, verification, and sending in a single subscription.

7.3
60AI-stack fitCommunity MCP serverREST APIFree plan
Snov.io product screenshot

An all-in-one prospecting, verification, and outreach suite.

Snov.io has no vendor-shipped MCP server. Zapier's hosted MCP exposes email-finding and prospect actions to Claude, Cursor, and other clients, and a viaSocket wrapper does the same. The documented REST API (api.snov.io/v2, token auth) is the more direct path for custom agent work.

The verdict: The best-value all-in-one pick here if you want more than just an email finder.

What's good

  • Forever-free plan with 50 credits/mo and no card required
  • Bundles email finding, verification, warmup, campaigns, and a light CRM at one price
  • Unlimited team seats on every paid plan

What's not

  • No official MCP server; agent access relies on Zapier's hosted connector
  • Warmup and campaign features add complexity if you only need a finder

Pricing

Free (50 credits/mo), paid from $39/mo (billed monthly)

Ocean.io logo

Best for: ABM and demand teams refining their ideal-customer targeting.

7.2
74AI-stack fitCommunity MCP serverREST API14-day trial
Ocean.io product screenshot

Lookalike account discovery powered by AI.

Ocean.io ships a public REST API (token auth, company and people enrichment, lookalike search) plus native CRM integrations for pushing lists. An early-stage third-party community MCP server (Meerkats-Ai/ocean-io-mcp-server) wraps that API, but Ocean.io itself does not publish an official MCP server.

The verdict: A focused tool for finding more accounts that look like your winners.

What's good

  • Strong at building lookalike account lists from your best customers
  • Good for ABM targeting

What's not

  • Pricier than broad data vendors at the same tier
  • Narrower than full-stack data vendors

Pricing

$79/month (Premium), billed monthly

Findymail logo

Best for: Teams that want high-confidence verified emails and will pay a premium entry price for it.

7.2
62AI-stack fitCommunity MCP serverREST API
Findymail product screenshot

A verified-only email finder with a CRM-hygiene add-on.

Findymail has no first-party MCP server, but a community-built server (Meerkats-Ai/findymail-mcp-server) and a Zapier-hosted MCP both expose its Find and Verify actions to Claude and other MCP clients. The underlying REST API is documented and usable directly from Clay, n8n, or Make.

The verdict: A solid, if pricier, verified-email finder with an unusually strong CRM-hygiene product bolted on.

What's good

  • Pay only for verified results; unverified lookups don't cost credits
  • Datacare add-on keeps CRM contacts enriched and deduplicated automatically
  • 10 free credits to test with no credit card required

What's not

  • Entry plan starts at $99/mo, pricier than most finders' entry tier
  • No official MCP server, only a third-party community wrapper

Pricing

From $99/mo (5,000 finder credits, billed monthly)

Anymail Finder logo

Best for: Teams who want to pay only for emails that come back verified, not every lookup attempt.

7.0
58AI-stack fitCommunity MCP serverREST API14-day trial
Anymail Finder product screenshot

A pay-per-verified-result email finder with a delivery guarantee.

Anymail Finder has no vendor-built MCP server, but its REST API is simple enough that Zapier's hosted MCP and a Pipedream connector both expose Find and Verify actions to Claude, Cursor, and other MCP clients. The API itself works natively from Clay, n8n, and Make as an HTTP step.

The verdict: A reliable, narrowly-focused email finder that plugs cleanly into no-code and agent stacks via Zapier.

What's good

  • Only charges credits for verified, deliverable results
  • 97%+ delivery guarantee backed by a refund policy on bounces
  • Bulk search, single search, and API draw from one shared credit pool

What's not

  • No permanent free plan, just a 14-day trial with 100 credits
  • No official MCP server; agent access runs through Zapier or Pipedream wrappers

Pricing

From €26/mo (400 credits, billed monthly)

Expertise AI logo

Best for: SDR and RevOps teams who want proven GTM plays installed, not built from scratch.

7.0
44AI-stack fitNo MCP server yetFree plan
Expertise AI product screenshot

Install expert-built GTM skills and run them across your stack, no build required.

Expertise AI connects to 100+ tools (HubSpot, Salesforce, Slack, Apollo, Gong) through built-in integrations, but there is no MCP server and no documented public API below the custom Enterprise tier, so an outside agent like Claude cannot drive it directly today.

The verdict: A real skills marketplace for GTM work, held back by opaque pricing and no agent-native access yet.

What's good

  • 100+ pre-built, expert-designed skills you install rather than build
  • Broad integration list (100+ tools, including HubSpot, Salesforce, Apollo, Gong)
  • Genuinely free tier with 200 credits/day and no card required

What's not

  • Confusing multi-product pricing page (AI Agent, Booking, and Assistant are three separate priced products under one brand)
  • No MCP server and no public API outside a custom Enterprise tier

Pricing

Free, paid from $40/mo (billed annually)

Seamless.AI logo

Best for: Teams that want high-volume contact discovery on a budget.

6.9
84AI-stack fitOfficial MCP serverREST APIFree plan
Seamless.AI product screenshot

A real-time search engine for B2B contacts.

Seamless.AI ships an official MCP server at mcp.seamless.ai with 54 tools across search, enrichment, and campaigns, authenticated via OAuth 2.0 or API key. It also exposes a REST API (JSON, OAuth 2.0) plus native Salesforce, HubSpot, and Pipedrive connectors.

The verdict: Volume-friendly, but verify the data before you trust a sequence to it.

What's good

  • Large contact database with a Chrome extension
  • Real-time verification on lookups

What's not

  • Data accuracy and aggressive sales get mixed reviews
  • Opaque pricing and credit limits

Pricing

Free plan, paid tiers custom

Skrapp.io logo

Best for: Individual reps and small teams doing LinkedIn-first prospecting on a tight budget.

6.6
46AI-stack fitNo MCP server yetREST APIFree plan
Skrapp.io product screenshot

A budget, LinkedIn-first email finder with a usable free tier.

Skrapp.io publishes a documented REST API (X-Access-Key auth) for search, verification, and company lookups, but neither Skrapp itself nor the wider community has shipped an MCP server for it. Agents can only reach Skrapp by calling the API directly or scripting around it.

The verdict: A cheap, capable LinkedIn email finder, but the least agent-ready tool in this set.

What's good

  • Usable free plan (50 credits, no subscription required)
  • Deep LinkedIn and Sales Navigator enrichment, including multi-page profile pulls
  • Month-to-month billing with no lock-in contracts

What's not

  • No MCP server of any kind; the REST API is the only programmatic path
  • Daily search caps (20-150 lookups) throttle heavy prospecting

Pricing

Free (50 credits), paid from $39/mo billed monthly ($29/mo billed annually)

How CR Buddy picks

The method

Every tool here is researched across official docs, live pricing pages, and real user reviews on G2 and Capterra, then scored on four things: fit for the job, real pricing, how well it scales as your team grows, and AI-stack fit (MCP support, API depth, and how cleanly an agent can drive it).

Chief Revenue Buddy does not claim to have hands-on tested every tool; nobody honestly has. The ranking reflects deep research and a decade of selling experience, and affiliate links never move a score. More on the method →

Frequently asked questions

What is the best prospecting & data tool?

Clay tops this list with an editorial score of 9/10. If you're serious about AI-driven outbound, Clay is close to essential. That said, the right pick depends on your team size, budget, and AI stack, so read each entry before deciding.

Which prospecting & data tools work with AI agents like Claude or ChatGPT?

Chief Revenue Buddy scores every tool on AI-stack fit: whether it offers an MCP server, the depth of its API, and how cleanly an agent can read and write its data. 16 of the 21 tools here ship MCP support or a community MCP server. See the AI-stack-fit score on each entry.

Are there free prospecting & data tools?

Yes, 12 of the 21 tools on this list offer a free plan. Look for the "Free plan" tag on each entry.

How does Chief Revenue Buddy rank these tools?

Tools are ordered by editorial score, with AI-stack fit as a strong tie-breaker. The score weighs fit for the job, real pricing, and how cleanly an agent can drive the tool. Affiliate links never change a score.

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