The GTM engineering tools directory
52 tools GTM engineers build with, organised by the layer of the stack they fill: signals, contact data, enrichment, verification, AI, sending, LinkedIn and CRM. Every page shows pricing checked on a stated date, how the tool connects to Clay, and where it fits in a working system. How we research tools.
How does a GTM engineering stack fit together?
Data flows top to bottom: a signal picks the account, data and enrichment fill in the people, verification protects your domains, AI writes the context, and the sequencer and CRM do the rest. Read the full walkthrough in Clay integrations: how the GTM engineering stack fits together.
Intent and signal tools
How to choose intent and signal tools →
Bombora
B2B intent data from a publisher data co-op: Company Surge scores show which accounts are researching 25,300+ topics.
- 25,300+ intent topics
- Surge vs a 12-week baseline
- Company Surge score threshold of 60
Contact sales
Champify
Salesforce-native tracking of champion and past-customer job changes, new executive hires and relationship history.
- Champion job-change tracking
- New executive hire alerts
- Insider AI from calls and email
From $500/mo
Common Room
Buyer intelligence platform that unifies CRM, product, website and community signals and resolves them to real people and accounts.
- Website visitor de-anonymisation
- Person and account signal matching
- RoomieAI research and personalisation
$2,500/mo (annual)
Leadfeeder
EU-based, company-level website visitor identification with a free plan, CRM sync and a global contact database.
- Company-level website visitor ID
- Bot and ISP traffic filtering
- 50+ filters for custom feeds
Free plan · Free plan; paid from €79/mo (annual)
PredictLeads
Company signals API: job openings, news events, technologies, financing and connections, sourced from company websites.
- Job openings at 3M+ companies
- News events in 37 categories
- Tech detection across 99M+ companies
Free plan · Free 100 credits/mo; then $40/mo min
RB2B
Website visitor identification that names US visitors at the person level and identifies companies globally.
- US person-level visitor ID
- Global company-level identification
- ICP filters with per-filter routing
Free plan · Free plan; paid from $79/mo
TheirStack
Job postings and technographics data, from a search app, API, webhooks and MCP, for hiring and tech-stack signals.
- Job posts from 195+ countries
- Technographics from job descriptions
- Webhooks from saved searches
API from $49/mo; app from $109
Warmly
Annual-contract inbound platform combining website de-anonymisation, intent signals, AI chat and outbound orchestration agents.
- Website visitor de-anonymisation
- First-, second- and third-party signals
- AI Inbound Agent and chat
From $10,000/yr
Data providers
How to choose data providers →
Apollo.io
B2B contact database with built-in sequencing, dialler, CRM enrichment and AI research, priced per seat with pooled credits.
- Contact and account database
- Built-in email sequences
- Waterfall across 20+ data partners
Free plan · Free; paid from $49/seat/mo (annual)
BetterContact
Waterfall enrichment that checks 20+ vendors for a contact's email and mobile, verifies them, and bills only for valid results.
- Waterfall across 20 named vendors
- Bouncer verification on every plan
- Lead Finder across 7+ databases
$15/mo
ContactOut
Finder for personal emails, work emails and mobiles from professional profiles, with a Chrome extension, API and Clay actions.
- Personal emails and mobile numbers
- Chrome extension and search portal
- 20+ search attributes
Free plan · $39/mo (annual)
Dropcontact
French B2B email finder and enrichment tool that generates and verifies emails algorithmically, with no stored contact database.
- Pay-on-success email finding
- Name and job title cleaning
- French SIREN, SIRET and NAF data
From €79/mo
Findymail
Email finder and verifier with a sub-5% bounce guarantee, EU hosting, non-EU mobile lookup, signal-based prospecting plans and Clay actions.
- Verified work email finding
- Under-5% bounce guarantee
- Mobile numbers for non-EU contacts
Free plan · $99/mo
FullEnrich
Waterfall contact enrichment across 25+ data sources for verified work emails, personal emails and mobile numbers, pay per result.
- Waterfall across 25+ sources
- Email and phone verification
- Reverse email lookup
$26/mo (annual)
Hunter
Email finder, domain search and verifier built on public web sources, with a B2B database, signals and built-in cold email sequences.
- Domain Search with public sources
- Email Finder at 1 credit
- Email Verifier at 0.5 credits
Free plan · Free plan; paid from £28/mo (annual)
LeadMagic
API-first B2B data provider: work email, mobile, validation, job and company data from one credit pool, with MCP and Clay actions.
- 14 endpoints, one credit pool
- Email Finder at 1 credit
- Mobile Finder at 5 credits
$83/mo (annual)
Lusha
Self-serve B2B contact and company data with a Chrome extension, API, MCP server and buying signals, priced in credits.
- Emails 1 credit, phones 5 credits
- Credit rollover up to 2x the limit
- Company signals inside Clay
Free plan · Free plan; paid from $37.45/mo (annual)
People Data Labs
Developer-first person, company, job posting and IP data via API or bulk licence, billed per match.
- Billed per match, not per call
- Likelihood score from 1 to 10
- Person, company and job search
Free plan · Free plan; Pro from $98/mo
Prospeo
B2B contact data provider for verified work emails and mobile numbers, with people search, CSV and API enrichment and CRM sync.
- Up to 41 people and company filters
- Verified emails and mobile numbers
- No charge when no email is found
Free plan · Free plan; paid from $37/user/mo
Wiza
Contact data tool that turns LinkedIn and Sales Navigator searches into verified emails and phone numbers via Chrome extension or API.
- Bulk Sales Navigator list exports
- Real-time verified emails and phones
- 850M+ contact Prospect database
Free plan · Free plan; paid from $49/user/mo
ZoomInfo
Enterprise B2B data and intelligence platform: contacts, company records, intent topics and workflows, sold by annual contract.
- 500M+ professional profiles
- 135M+ direct dial numbers
- Buyer intent on Copilot plans
Contact sales
Enrichment and orchestration tools
How to choose enrichment and orchestration tools →
BuiltWith
Technographic data platform that detects the technologies a website uses and builds lead lists of sites running a given tool.
- Tech stack lookup for any domain
- Lists of sites using a technology
- Technology change alerts to Slack
Free plan · API from $99; plans from $295/mo
Clay
GTM data platform that combines 150+ data providers, AI research agents and workflow automation in spreadsheet-style tables.
- 150+ data providers in one place
- Multi-provider waterfalls
- Claygent AI web research
Free plan · Free; paid from $167/mo (annual)
Coresignal
Public web data provider selling company, employee and job-posting records through credit-based APIs and bulk datasets.
- Company and employee records
- Job postings at 1 credit each
- Agentic natural-language search
Free plan · $49/mo
Crunchbase
Private-company data platform for funding rounds, investors, acquisitions, growth scores and funding predictions, via web app, MCP and API.
- Funding, investor and M&A data
- Funding and acquisition predictions
- Growth and heat scores
Free plan · $49/mo (annual, first year)
Exa
AI-native web search API plus Websets, a tool that builds verified company and people lists from a natural-language description.
- Semantic web search API
- Full page contents for LLMs
- Websets ICP list building
Free plan · Free credits; Websets from $49/mo
Deliverability tools
How to choose deliverability tools →
MillionVerifier
Low-cost bulk and API email verification from Hungary, with catch-all checks included and credits that never expire.
- One-time credits that never expire
- Five result categories
- Catch-all verifier
$39 for 10,000 credits (one-time)
NeverBounce
ZoomInfo-owned email verification with five result codes, bulk and real-time checks, and Sync for automatic CRM list cleaning.
- Five verification result codes
- Pay-as-you-go from $8 per 1,000
- Scheduled CRM Sync re-verification
$8 per 1,000 credits (one-time)
ZeroBounce
Email verification with seven result statuses, AI scoring for risky addresses, EU-hosted processing and free unknowns.
- Seven validation statuses
- Vetted catch-alls marked accept_all
- AI Scoring for risky rows
Free plan · Free 100/mo; credits from $39
Automation and AI tools
How to choose automation and AI tools →
Apify
Web scraping and automation platform with 90,000+ ready-made scrapers (Actors), billed by usage or per result.
- 90,000+ ready-made Actors
- Pay-per-event Actor pricing
- Residential and SERP proxies
Free plan · Free; paid from $17/mo (annual)
Claude Code
Anthropic's agentic coding tool that reads files, runs commands and connects to tools via MCP, in the terminal, IDE, desktop and web.
- Terminal, IDE, desktop and web
- MCP servers for external tools
- CLAUDE.md, skills, hooks, subagents
$17/mo (annual) or $20/mo
Make
Hosted visual automation platform (owned by Celonis) that connects 3,500+ apps in scenarios billed by credits.
- Visual scenario builder
- 3,500+ app integrations
- Routers, filters and iterators
Free plan · Free plan; paid from $9/mo (annual)
n8n
Workflow automation platform with AI agent nodes, available as n8n Cloud or as a free self-hosted Community edition.
- Visual workflows with code steps
- 2,367 listed integrations
- AI agent workflows
Free self-hosted; Cloud €20/mo (annual)
OpenAI
Maker of the GPT models: a per-token API used inside Clay and automation tools, plus ChatGPT plans for teams.
- Per-token API pricing by model
- Batch and Flex at about 50% off
- Hosted web search tool
Pay-as-you-go API; ChatGPT Plus $20/mo
Perplexity
AI answer engine with cited web search, sold as Pro and Max plans and as a pay-as-you-go API (Sonar, Search and Agent API).
- Web answers with cited sources
- Pay-as-you-go Sonar API
- Search API from $1 per 1,000
Pay-as-you-go API; app Pro $17/mo
Zapier
No-code automation platform connecting 10,000+ apps with trigger-and-action Zaps, billed by completed tasks.
- 10,304+ app integrations
- Billed per successful action
- Webhooks by Zapier
Free plan · Free plan; paid from $19.99/mo
Cold email tools
How to choose cold email tools →
Instantly
Cold email platform with unlimited sending accounts and warm-up, plus a credit-based B2B lead database and CRM.
- Unlimited email accounts and warm-up
- Plans priced on monthly email volume
- 450M+ B2B lead database
$37.6/mo (annual)
lemlist
Multichannel outreach platform for cold email, LinkedIn and calls, with a built-in lead database and warm-up.
- Unlimited senders on Email plan
- LinkedIn, SMS and call steps
- 650M+ lead database on credits
$55/mo (annual)
Outreach
Enterprise sales engagement and AI agent platform: sequences, dialer, conversation intelligence, deals and forecasting.
- Multichannel sequences via API
- Amplify packages with AI credits
- API call limits by package
Contact sales
Reply.io
Multichannel sequencing for email, LinkedIn, calls and SMS, priced by active contacts, with an AI SDR tier and agency workspaces.
- Billed on active contacts
- Unlimited mailboxes with warm-up
- LinkedIn, calls and SMS steps
$49/mo (annual, 1,000 contacts)
Salesloft
Enterprise revenue platform: Cadence sequencing, conversation intelligence, deals and Clari Forecast, sold through sales.
- Email, call and task Cadences
- Conversation intelligence
- Clari forecasting and inspection
Contact sales
Smartlead
Cold email platform with unlimited mailboxes, warm-up, inbox rotation and agency client workspaces.
- Unlimited mailboxes on every plan
- Automatic warm-up and rotation
- Unibox shared reply inbox
$32/mo (annual)
Woodpecker
Polish cold email platform priced by contacted prospects, with unlimited mailboxes, built-in catch-all verification and EU hosting.
- Billed by contacted prospects
- Unlimited mailboxes and team members
- Built-in catch-all verification
$35/mo, or $280/yr (500 prospects)
LinkedIn automation tools
How to choose LinkedIn automation tools →
HeyReach
LinkedIn outreach automation that rotates sending across multiple LinkedIn accounts, with a unified inbox for agencies and teams.
- Sender rotation across LinkedIn accounts
- Connection requests, messages, voice notes
- Unified inbox with sentiment tags
$63/sender/mo (annual)
La Growth Machine
French multichannel sequencer that runs LinkedIn, email, voice messages and calls from one lead record, billed per sending identity.
- LinkedIn, email and call sequences
- Per-identity billing, free members
- Email waterfall across 9 providers
€50/identity/mo (annual)
PhantomBuster
Cloud automations (Phantoms) that extract and act on data from LinkedIn, Sales Navigator and 15+ other platforms, run on a time budget.
- LinkedIn and Sales Navigator exports
- Extraction from 15+ platforms
- Billed by execution hours, not seats
€56/mo (annual)
Surfe
Chrome extension and API that add LinkedIn profiles to your CRM in one click and find emails and mobiles through a multi-provider waterfall.
- One-click LinkedIn to CRM
- Two-way CRM sync
- Waterfall across 15+ providers
Free plan · Free plan; paid from €29/user/mo
Attio
Flexible, data-model-first CRM with custom objects, workflows and a native Clay integration, priced per seat.
- Custom objects and attributes
- Gmail and Outlook auto-sync
- Built-in record enrichment
Free plan · Free; paid from £27/user/mo (annual)
Close
Sales CRM with calling, SMS, email and workflows built in, plus Chloe, an AI agent that calls and qualifies leads on usage credits.
- Built-in calling, SMS and recording
- Power and predictive dialers
- Workflows and bulk email on Growth
$9/user/mo (annual)
HubSpot
CRM platform with a free tier and per-seat paid plans covering sales, marketing and service, plus a large app marketplace.
- Free CRM for up to 2 users
- Two-way Gmail and Outlook sync
- Workflows and sales sequences
Free plan · Free plan; paid from £7/seat/mo (annual)
Pipedrive
Pipeline-first sales CRM built around visual deal stages, sold per seat in four plans with a token-based API budget.
- Customisable deal pipeline stages
- Two-way email sync with tracking
- Automations and nurturing sequences
£14/seat/mo (annual)
Salesforce
Enterprise CRM (Sales Cloud) with a deep customisable data model, SOQL and APIs, sold in editions from a 2-user free suite to Max.
- Custom objects and fields
- SOQL queries for integrations
- Free Suite for up to 2 users
Free plan · Free Suite; paid from £20/user/mo
GTM engineering stacks
- AI-agent GTM stack with Claude CodeAn AI agent GTM stack: Claude Code with Clay's plugin, n8n, OpenAI, Perplexity and Exa for research, Instantly for sending and HubSpot, with costs.
- Clay-centred enrichment stackA Clay enrichment stack on Growth: Prospeo, LeadMagic and FullEnrich waterfall, ZeroBounce, OpenAI and Perplexity research, and CRM sync, with costs.
- Enterprise outbound stackAn enterprise outbound stack: ZoomInfo, Bombora, Clay, ZeroBounce, Outreach or Salesloft and Salesforce, with published costs and what is contact sales.
- Lean cold email stack for small teamsA lean cold email stack for small teams: Prospeo, MillionVerifier, Smartlead and a free CRM, with verification, warm-up and costs from about $70 a month.
- LinkedIn and email multichannel stackA LinkedIn and email outreach stack: HeyReach with Smartlead, or La Growth Machine, plus Prospeo, Surfe and HubSpot, with published costs per sender.
- Signal-based outbound stackA signal-based outbound stack: RB2B and PredictLeads signals, Clay, a Prospeo and Findymail waterfall, MillionVerifier, Smartlead and HubSpot, with costs.
Head-to-head comparisons
- Clay alternatives in 2026: what to use instead, by use caseClay alternatives for 2026 grouped by job: all-in-one data, contact finding, waterfall enrichment and build-your-own, with prices checked October 2026.
- Clay vs Apollo: pricing, data and which one you needClay vs Apollo compared on price, data, sending and CRM sync, with a worked cost for 1,000 contacts a month. Prices checked October 2026.
- Instantly vs Smartlead: pricing, limits and agency featuresInstantly vs Smartlead compared on price, contact and send limits, warm-up, API and agency workspaces, with a worked cost for 10 inboxes. October 2026.
- lemlist vs Instantly: pricing, limits and LinkedIn comparedlemlist vs Instantly compared on price, sending limits, warm-up, LinkedIn and Clay, with a worked monthly cost for three inboxes. Checked October 2026.
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