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Apollo.io vs Warmly

A detailed comparison of Apollo.io and Warmly. Find out which AI SDR solution is right for your team.

📌Key Takeaways

  • 1Apollo.io vs Warmly: Comparing 6 criteria.
  • 2Apollo.io wins 0 categories, Warmly wins 0, with 6 ties.
  • 3Apollo.io: 4.5/5 rating. Warmly: 4.3/5 rating.
  • 4Both tools are evenly matched - choose based on your specific needs.
Option A

Apollo.io

4.5

End-to-end B2B sales intelligence and engagement platform with 265M+ contacts, AI-powered research, and multi-channel outreach automation

0 wins
View full review →
Option B

Warmly

4.3

AI-powered website visitor identification and warm outbound platform that reveals buying committees and automates personalized outreach

0 wins
View full review →

0

Apollo.io wins

6

Ties

0

Warmly wins

Feature Comparison

CriteriaApollo.ioWarmlyWinner
Email Deliverability44Tie
Personalization55Tie
Automation Level55Tie
CRM Integration33Tie
Ease of Use55Tie
Multi-channel Support55Tie

Detailed Analysis

Email Deliverability

Tie

Apollo.io

Apollo.io's email deliverability capabilities

Warmly

Warmly's email deliverability capabilities

Comparing email deliverability between Apollo.io and Warmly.

Personalization

Tie

Apollo.io

Apollo.io's personalization capabilities

Warmly

Warmly's personalization capabilities

Comparing personalization between Apollo.io and Warmly.

Automation Level

Tie

Apollo.io

Apollo.io's automation level capabilities

Warmly

Warmly's automation level capabilities

Comparing automation level between Apollo.io and Warmly.

CRM Integration

Tie

Apollo.io

Apollo.io's crm integration capabilities

Warmly

Warmly's crm integration capabilities

Comparing crm integration between Apollo.io and Warmly.

Ease of Use

Tie

Apollo.io

Apollo.io's ease of use capabilities

Warmly

Warmly's ease of use capabilities

Comparing ease of use between Apollo.io and Warmly.

Multi-channel Support

Tie

Apollo.io

Apollo.io's multi-channel support capabilities

Warmly

Warmly's multi-channel support capabilities

Comparing multi-channel support between Apollo.io and Warmly.

Feature-by-Feature Breakdown

Massive AI‑enhanced contact database

Warmly

Apollo.io

Provides access to over 270 million verified contacts and 30 million companies, continuously enriched by AI algorithms that validate emails, phone numbers, and firmographic data, ensuring high‑quality prospect lists for outbound campaigns. Higher lead accuracy reduces bounce rates and improves conversion.

Higher lead accuracy reduces bounce rates and improves conversion

Warmly

Warmly's visitor identification technology operates as a sophisticated intelligence layer that transforms anonymous website traffic into actionable sales opportunities. When a prospect visits your website, the platform's proprietary de-anonymization engine cross-references IP addresses, browser fingerprints, and behavioral patterns against extensive B2B databases to reveal the visitor's identity with remarkable accuracy. The system captures comprehensive data including company name, industry, employee count, revenue range, and technology stack, along with individual-level details such as the visitor's name, job title, seniority level, LinkedIn profile, and direct contact information. Beyond basic identification, Warmly tracks the visitor's entire journey—which pages they viewed, how long they spent on each, what content they downloaded, and their engagement patterns over multiple sessions. This behavioral intelligence is crucial for understanding buying intent and timing outreach appropriately. Convert anonymous website traffic into qualified leads with immediate outreach opportunities, capturing high-intent prospects before they move to competitors.

Convert anonymous website traffic into qualified leads with immediate outreach opportunities, capturing high-intent prospects before they move to competitors

Both Apollo.io and Warmly offer Massive AI‑enhanced contact database. Apollo.io's approach focuses on provides access to over 270 million verified contacts and 30 million companies, continuously enriched by ai algorithms that validate emails, phone numbers, and firmographic data, ensuring high‑quality prospect lists for outbound campaigns., while Warmly emphasizes warmly's visitor identification technology operates as a sophisticated intelligence layer that transforms anonymous website traffic into actionable sales opportunities.. Choose based on which implementation better fits your workflow.

Multi‑channel sequence automation

Warmly

Apollo.io

Allows users to create email, phone, LinkedIn, and social media sequences with conditional triggers, A/B testing, and automated follow‑ups, all managed from a single dashboard. Saves time and ensures consistent outreach cadence.

Saves time and ensures consistent outreach cadence

Warmly

Warmly's machine learning-driven lead scoring system continuously analyzes dozens of signals to predict which prospects are most likely to convert into customers. The algorithm evaluates firmographic data including company size, industry, technology stack, and growth indicators, combining this with behavioral signals such as page views, time on site, content engagement, email opens, and response patterns. What makes Warmly's scoring particularly powerful is its adaptive learning capability—the system studies your historical conversion data to identify the specific patterns that predict success for your unique business. Scores update dynamically in real-time as prospects interact with your website, emails, and content, ensuring sales teams always have current intelligence. The platform also incorporates intent data from third-party sources, identifying companies actively researching solutions in your category across the web. Prioritize high-value prospects with surgical precision, enabling sales teams to focus their limited time on accounts with the highest conversion probability and largest deal potential.

Prioritize high-value prospects with surgical precision, enabling sales teams to focus their limited time on accounts with the highest conversion probability and largest deal potential

Both Apollo.io and Warmly offer Multi‑channel sequence automation. Apollo.io's approach focuses on allows users to create email, phone, linkedin, and social media sequences with conditional triggers, a/b testing, and automated follow‑ups, all managed from a single dashboard., while Warmly emphasizes warmly's machine learning-driven lead scoring system continuously analyzes dozens of signals to predict which prospects are most likely to convert into customers.. Choose based on which implementation better fits your workflow.

Integrated CRM and data enrichment

Warmly

Apollo.io

Bidirectional sync with Salesforce, HubSpot, Microsoft Dynamics, Pipedrive and others, plus real‑time enrichment that updates contact records with new job changes, intent signals, and company data. Eliminates duplicate data entry and keeps the sales pipeline up‑to‑date.

Eliminates duplicate data entry and keeps the sales pipeline up‑to‑date

Warmly

The automated email sequence engine represents Warmly's execution layer, transforming prospect intelligence into personalized multi-touch campaigns that run autonomously. The platform's AI generates email copy tailored to each recipient's role, company, industry, and observed behaviors—referencing specific pages they visited, content they engaged with, or actions they took. Sequences are intelligently triggered based on configurable criteria including lead score thresholds, specific website behaviors, time-based rules, or CRM field changes. The system handles sophisticated follow-up logic, automatically adjusting timing based on engagement patterns, pausing sequences when prospects respond, and escalating to human review when appropriate. Warmly optimizes send times using machine learning analysis of historical response data, ensuring emails arrive when recipients are most likely to engage. Scale personalized outreach to thousands of prospects simultaneously without sacrificing relevance, while freeing sales representatives to focus on high-value conversations rather than repetitive tasks.

Scale personalized outreach to thousands of prospects simultaneously without sacrificing relevance, while freeing sales representatives to focus on high-value conversations rather than repetitive tasks

Both Apollo.io and Warmly offer Integrated CRM and data enrichment. Apollo.io's approach focuses on bidirectional sync with salesforce, hubspot, microsoft dynamics, pipedrive and others, plus real‑time enrichment that updates contact records with new job changes, intent signals, and company data., while Warmly emphasizes automated email sequence engine represents warmly's execution layer, transforming prospect intelligence into personalized multi-touch campaigns that run autonomously.. Choose based on which implementation better fits your workflow.

AI Assistant & AI Projects

Warmly

Apollo.io

AI‑driven assistants generate personalized email copy, recommend next‑best actions, and can be prompted to build targeted prospect lists or trigger workflows, acting as a co‑pilot throughout the sales process. Accelerates content creation and improves relevance of outreach.

Accelerates content creation and improves relevance of outreach

Warmly

Warmly's ABM functionality enables revenue teams to orchestrate sophisticated multi-stakeholder campaigns targeting their most valuable potential customers. The platform allows teams to define target account lists based on ideal customer profile criteria, then tracks engagement across the entire buying committee—from initial researchers to economic decision-makers. When anyone from a target account visits your website, Warmly immediately alerts the assigned account owner and captures the engagement in a unified account timeline. The system coordinates outreach across multiple stakeholders, ensuring messaging is consistent yet role-appropriate, and preventing the embarrassment of duplicate or conflicting communications. Advanced features include buying committee mapping, which identifies additional stakeholders to engage, and account-level scoring that aggregates individual engagement into a holistic view of account readiness. Increase average deal size and accelerate complex B2B sales cycles by engaging entire buying committees with coordinated, contextual messaging that addresses each stakeholder's unique concerns.

Increase average deal size and accelerate complex B2B sales cycles by engaging entire buying committees with coordinated, contextual messaging that addresses each stakeholder's unique concerns

Both Apollo.io and Warmly offer AI Assistant & AI Projects. Apollo.io's approach focuses on ai‑driven assistants generate personalized email copy, recommend next‑best actions, and can be prompted to build targeted prospect lists or trigger workflows, acting as a co‑pilot throughout the sales process., while Warmly emphasizes warmly's abm functionality enables revenue teams to orchestrate sophisticated multi-stakeholder campaigns targeting their most valuable potential customers.. Choose based on which implementation better fits your workflow.

Advanced analytics & reporting

Warmly

Apollo.io

Tracks sequence performance, open/click/reply rates, buyer intent scores, and provides built‑in dashboards for A/B testing, pipeline forecasting, and revenue attribution. Gives sales leaders data‑driven insights to optimize strategies.

Gives sales leaders data‑driven insights to optimize strategies

Warmly

Warmly's integration architecture ensures seamless bidirectional data flow with your existing sales technology ecosystem, eliminating data silos and manual entry that plague many sales organizations. The platform offers native, deep integrations with Salesforce and HubSpot that go beyond basic field mapping—Warmly understands CRM object relationships, respects existing workflows and automation rules, and maintains data hygiene standards. All prospect data, engagement metrics, email activities, and campaign results sync automatically in real-time, creating a complete picture of every interaction within your CRM. The integration also pulls data from your CRM to inform Warmly's AI, using historical opportunity data to improve lead scoring accuracy and leveraging existing account assignments to route new visitors appropriately. Custom field mapping allows organizations to capture Warmly-specific data points like visitor behavior scores and intent signals directly in their CRM records. Maintain perfect data accuracy across systems while enabling sales teams to work entirely within their preferred CRM interface, with all Warmly intelligence surfaced exactly where they need it.

Maintain perfect data accuracy across systems while enabling sales teams to work entirely within their preferred CRM interface, with all Warmly intelligence surfaced exactly where they need it

Both Apollo.io and Warmly offer Advanced analytics & reporting. Apollo.io's approach focuses on tracks sequence performance, open/click/reply rates, buyer intent scores, and provides built‑in dashboards for a/b testing, pipeline forecasting, and revenue attribution., while Warmly emphasizes warmly's integration architecture ensures seamless bidirectional data flow with your existing sales technology ecosystem, eliminating data silos and manual entry that plague many sales organizations.. Choose based on which implementation better fits your workflow.

Strengths & Weaknesses

Apollo.io

Strengths

  • Massive B2B database with 270M+ verified contacts and 30M+ companies, continuously enriched by AI for high data accuracy and low bounce rates.
  • All-in-one platform combines prospecting, sequencing, CRM sync, and analytics - eliminates need for multiple point solutions and reduces tool sprawl.
  • AI-powered email writer and assistant generates personalized outreach at scale, recommends next-best actions, and builds targeted prospect lists from natural language prompts.
  • Bidirectional CRM integration with Salesforce, HubSpot, and others keeps data synchronized in real-time and eliminates duplicate data entry.
  • Flexible pricing with free tier and credit-based model makes enterprise-grade sales intelligence accessible to startups and SMBs.

Weaknesses

  • Credit system can be confusing - mobile numbers cost extra credits, and heavy users may find credit consumption adds up quickly.
  • Data accuracy varies by region - while US/EU contact data is strong, international markets may have less reliable information.
  • Per-user pricing on higher tiers can become expensive for large sales teams compared to flat-rate competitors.
  • Learning curve for advanced features - workflow automation and AI assistant require time to configure optimally.

Warmly

Strengths

  • Website Visitor Identification: Warmly's visitor identification technology operates as a sophisticated intelligence layer that transforms anonymous website traffic into actionable sa...
  • AI-Powered Lead Scoring: Warmly's machine learning-driven lead scoring system continuously analyzes dozens of signals to predict which prospects are most likely to convert int...
  • Automated Email Sequences: The automated email sequence engine represents Warmly's execution layer, transforming prospect intelligence into personalized multi-touch campaigns th...
  • Account-Based Marketing Capabilities: Warmly's ABM functionality enables revenue teams to orchestrate sophisticated multi-stakeholder campaigns targeting their most valuable potential cust...
  • CRM Integration & Sync: Warmly's integration architecture ensures seamless bidirectional data flow with your existing sales technology ecosystem, eliminating data silos and m...

Weaknesses

  • Learning curve for advanced automation features - optimal configuration may require experimentation and iteration.
  • Data accuracy varies by region - international markets may have less comprehensive or current contact information.
  • AI-generated content requires human review to ensure accuracy and brand voice consistency.

Industry-Specific Fit

IndustryApollo.ioWarmlyBetter Fit
All IndustriesApollo.io’s flexible data filters, AI‑driven intent detection, and customizable workflows allow any vertical—from SaaS to manufacturing—to build precise prospect lists, automate outreach, and integrate with existing CRMs, making the platform universally applicable.Not specifiedApollo.io
SaaSProvides deep technographic filters and product‑usage intent signals that help SaaS companies target accounts showing trial usage or recent funding, enabling timely outreach and faster customer acquisition.Not specifiedApollo.io
HealthcareOffers compliance‑ready GDPR and HIPAA‑compatible data handling, along with industry‑specific filters for hospital systems and medical device manufacturers, helping sales teams reach decision‑makers while maintaining regulatory standards.Not specifiedApollo.io
Financial ServicesIncludes financial‑industry SIC codes, intent data for regulatory compliance software, and secure data encryption, allowing banks and fintech firms to prospect safely and efficiently.Financial services firms including fintech companies, investment platforms, and B2B financial services providers use Warmly to identify and engage corporate prospects researching financial solutions. The platform's ability to reveal company-level intent signals helps financial services sales teams prioritize outreach to organizations with genuine buying interest, while compliance-friendly email automation ensures professional, appropriate communication.Warmly
E‑commerceLeverages buying‑intent signals such as recent cart activity or ad spend spikes to identify high‑value merchants, and integrates with e‑commerce platforms for seamless lead capture.Not specifiedApollo.io
ManufacturingProvides extensive SIC code filtering (see source 13) and equipment‑specific contact data, enabling manufacturers to target procurement officers and engineering leads.Manufacturing companies selling equipment, components, or services to other businesses use Warmly to identify procurement teams and engineers researching suppliers. The platform's visitor identification reveals which manufacturers are actively evaluating solutions, enabling timely outreach with relevant specifications and case studies. Integration with CRM systems helps manufacturing sales teams manage long, technical sales cycles effectively.Warmly
EducationOffers filters for K‑12, higher‑education, and ed‑tech organizations, plus intent data around curriculum purchases, helping vendors engage administrators and IT directors.Not specifiedApollo.io
Real EstateSupports property‑management and commercial‑real‑estate contact enrichment, allowing brokers to locate owners, investors, and leasing managers with high‑precision targeting.Not specifiedApollo.io

Our Verdict

Apollo.io and Warmly are both strong AI SDR solutions. Warmly stands out for massive ai‑enhanced contact database. Choose based on which specific features and approach best fit your workflow and requirements.

Choose Apollo.io if you:

  • You operate in All Industries
  • You prefer Apollo.io's approach to ai sdr
  • You prefer Apollo.io's approach to ai sdr
View Apollo.io

Choose Warmly if you:

  • You need massive ai‑enhanced contact database capabilities
  • You need multi‑channel sequence automation capabilities
  • You operate in B2B SaaS
View Warmly

Need Help Choosing?

Get expert guidance on selecting between Apollo.io and Warmly for your specific use case.

Find a Strategy Partner

Frequently Asked Questions

It depends on your specific needs. Apollo.io and Warmly each have strengths in different areas. Compare features, integrations, and pricing to determine which is best for your use case.
In some cases, yes. Many teams use complementary tools together. Check if both platforms offer integrations or APIs that allow them to work together.
Both platforms offer different onboarding experiences. Apollo.io and Warmly each have their own setup processes. Most users can get started with either within a few hours.
The main differences are in their approach, feature set, and target use cases. Review the comparison criteria above to see detailed breakdowns of how they differ.
For small teams, consider factors like ease of use, pricing tiers, and the specific features you need most. Both Apollo.io and Warmly can work for small teams depending on your priorities.

Sources & Evidence

  • Fully agentic end‑to‑end GTM platform with AI agents that orchestrate prospecting, engagement, and deal execution across the entire sales funnel

    Source: Apollo.io introduced the industry’s first fully agentic GTM platform in Oct 2025, enabling AI assistants to automate list building, outreach sequencing, and deal workflow without manual intervention (source 12).

  • Real-time website visitor identification with AI-powered lead scoring and automated personalized outreach

    Source: Warmly's core differentiator is its ability to identify anonymous website visitors in real-time and automatically trigger personalized email sequences based on behavioral signals and company data. While competitors like Clearbit or Hunter focus solely on data enrichment, and tools like Outreach or Salesloft concentrate on sequence automation, Warmly uniquely combines visitor identification with AI-driven SDR automation in a single integrated workflow. This creates a closed-loop system where website visits automatically generate qualified leads with full context, which then flow into personalized outreach sequences—all without manual intervention. According to customer testimonials, this integration reduces the time from website visit to first touch from days to minutes, dramatically improving conversion rates on high-intent traffic.

  • Apollo Wins “Best AI‑Powered Sales Solution” in 2025 MarTech Breakthrough Awards

    Source: Apollo News - View source

  • Apollo.io Unveils Industry’s First Fully Agentic End‑to‑End GTM Platform

    Source: Apollo News - View source

  • A complete overview of Apollo AI for 2025 - eesel AI

    Source: eesel.ai - View source

  • Sales Development Representative – Role, Skills & Success Tips

    Source: apollo.io - View source

  • Apollo.io

    Source: knowledge.apollo.io - View source

Last updated: January 30, 2026

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