Tools We Use to Build Your GTM System
We're tool-agnostic by philosophy but opinionated by experience. These are the platforms, AI systems, and automation tools we use to build outbound engines that actually work.
Free Tools for Outbound Teams
Self-serve tools and calculators we've built for the outbound community. Free to use, no signup required for the calculators; the Domain Finder takes a quick form so we can email back the cleaned list.
Domain Finder
Free up to 100 rowsPaste in a list of company names. Get back a clean spreadsheet with verified website domains, color-coded by match confidence. Built for outbound teams who hit the wall on Apollo.io's bulk match or are tired of manual Googling. 85 to 95 percent match rate, hand-reviewed within 24 to 48 hours.
Try Domain Finder →B2B Outbound ROI Calculator
Free, instantModel email and LinkedIn pipeline with warmup ramps, working-day sends, sales cycle lag, and multi-channel metrics. See what your outbound system can realistically produce before you commit budget to it.
Open the calculator →Apollo.io Audit & Roadmap
Free reviewGet a free Apollo.io audit from GTM Works. We review your setup, campaigns, and deliverability, then send back a written roadmap with prioritized recommendations. No pitch, just the gaps.
Request an audit →Apollo.io - The Foundation of Everything We Build
Apollo.io is the central platform for virtually every outbound system we build. It handles prospecting, sequencing, email deliverability, CRM integration, workflow automation, and Buying Intent signals - all in one place.
We've built dozens of Apollo.io instances from scratch and optimized many more that were underperforming. Our depth of experience with Apollo.io is what lets us configure it to your specific ICP, sales cycle, and team structure - not just follow the default setup guide.
- Persona and saved search creation for precise targeting
- Sequence strategy, copywriting, and A/B testing setup
- Buying Intent topic selection and signal-based outreach
- CRM integration with HubSpot, Salesforce, or Pipedrive
- Workflow automation for lead routing, enrollment, and CRM sync
- Mailbox setup, warmup, and deliverability monitoring
- AI Powerups for personalization and account research at scale
Why Apollo.io Over Clay, ZoomInfo, or Outreach?
Apollo.io combines prospect data, email sequencing, CRM, and automation in one platform at a price point accessible to startups and SMBs. Clay is excellent for advanced enrichment workflows but requires more technical setup. ZoomInfo has strong data but is expensive and requires separate sequencing tools. Outreach is a sales engagement platform without the prospecting database. Apollo.io is the best single-tool starting point for most B2B outbound motions.
Read the full comparison →Apollo.io Pricing
Apollo.io pricing starts at free (limited) and scales through Basic, Professional, and Organization tiers. For most clients running active outbound we recommend Professional or above for access to full workflow automation, advanced filtering, and Buying Intent signals. We help clients choose the right plan before committing.
HeyReach - LinkedIn at Scale
HeyReach is our LinkedIn automation platform of choice for clients who want to add LinkedIn outreach as a channel alongside cold email. It handles multi-sender LinkedIn campaigns, connection request sequencing, follow-up messaging, and A/B testing across sender accounts.
We configure HeyReach campaigns end to end - from workspace setup and lead list importing to message copy, variable entry, wait step timing, and campaign launch. Our campaigns are built to run alongside Apollo.io email sequences for a coordinated multi-channel outreach motion.
- Multi-sender LinkedIn campaigns across team accounts
- Connection request sequences with A/B message variants
- Follow-up message automation with personalized variables
- Lead list import from Apollo.io CSV exports
- Timezone and scheduling setup per client
HeyReach + Apollo.io Together
The most effective outbound systems we build run email via Apollo.io and LinkedIn via HeyReach in parallel. A prospect who doesn't respond to a cold email might accept a LinkedIn connection from the same sender. Running both channels increases reply rates and helps build brand familiarity with target accounts over time.
We handle the coordination between both tools - same lead lists, same personas, complementary messaging - so the two channels feel like part of one cohesive outreach motion rather than disconnected campaigns.
LinkedIn Managed Outreach →Signal-Based Outreach Tools
RB2B
Website IntentRB2B identifies individual visitors to your website and delivers their LinkedIn profile and contact information in real time. We use RB2B data to trigger warm outreach sequences in Apollo.io for people who have already shown interest in your product or service by visiting your site.
Website visitor ID setup tutorial →Apollo.io Buying Intent
Market IntentApollo.io's Buying Intent signals surface companies actively researching topics related to your category. We set up Intent topic selection, configure intent-triggered workflows, and build dedicated sequences for high-intent accounts - so your outreach hits when buyers are actively in-market.
Signal-based outreach →Apollo.io AI Powerups
AI EnrichmentApollo.io's AI Powerups let you run custom AI prompts against account data at scale - summarizing web pages, identifying pain points from LinkedIn profiles, categorizing companies by keyword, or generating personalized first lines for email sequences. We build Powerup configurations that plug into your sequences and enrich your lead data automatically.
AI Power-Ups deep dive →Building the Intelligence Layer
Claude (Anthropic)
Claude is our primary AI model for research, writing, and custom AI agent development. We use Claude to build AI-powered lead qualification engines, personalization workflows, and custom research tools that plug into your outbound system. Our Custom AI Lead Engine (like the one built for Reputation Prime) runs on Claude.
Claude Code
Claude Code is our AI-assisted development environment for building custom automation scripts, data processing pipelines, and integration code. When a client needs something Apollo.io's native workflow builder can't handle, we build it with Claude Code - typically in Node.js or Python and deployed on Railway or a similar platform.
n8n
n8n is our no-code / low-code automation platform for connecting tools that don't have native integrations. We use n8n to build multi-step workflows between Apollo.io, HubSpot, Google Sheets, Slack, and other tools - including webhook-based triggers, conditional logic, and data transformation between systems.
Workflow examples →ZapMail
ZapMail handles email infrastructure setup and warmup for clients launching new outbound domains and mailboxes. We use ZapMail to purchase and configure sending domains, set up Google Workspace mailboxes, configure DNS (SPF, DKIM, DMARC), and run warmup sequences before connecting mailboxes to Apollo.io sequences.
Email deliverability service →Supporting Tools in the Stack
Railway
Deployment platform for custom Node.js and Python automation scripts. We use Railway to host webhook servers, scheduled reporting scripts, and custom API integrations built for clients.
Google Sheets
Used as a lightweight data layer for reporting, lead staging, and client-facing dashboards. Many of our automations write output to Google Sheets for easy review without requiring clients to log into another platform.
HubSpot
The most common CRM we integrate with Apollo.io. We configure the native Apollo.io - HubSpot connector, field mappings, deal creation, stage sync, and suppression rules so both systems stay aligned.
CRM integration services →Salesforce
For enterprise clients using Salesforce, we configure the Apollo.io - Salesforce integration including lead vs. contact routing, opportunity sync, field schema review, and activity logging.
CRM integration services →LinkedIn Sales Navigator
Used alongside Apollo.io for advanced account targeting, lead list building, and intent research for clients who need more granular LinkedIn data than Apollo.io provides natively.
TheirStack
TheirStack surfaces companies by tech stack and job posting signals. We use TheirStack data to build targeted Apollo.io contact lists for clients selling to companies using specific technologies or actively hiring for specific roles.
Our Tool Philosophy
We don't recommend tools because we're paid to. We recommend them because they work. Every tool in our stack has been tested in live client engagements and earned its place through results.
We're also not locked into any single stack. If your company already uses Outreach, Clay, or ZoomInfo, we'll work within those tools or advise on whether switching makes sense for your goals. The goal is always pipeline - not tool adoption for its own sake.