Apollo.io vs Success.ai: Sales Engagement Platform vs Cold Email Platform Comparison
Compare Apollo.io (sales engagement platform) and Success.ai (cold email platform) side by side. See pricing, features, and integrations to decide which one, or both, your stack needs.
Apollo.io is a sales engagement platform built for multi-channel outreach across email, phone, and LinkedIn, with a free entry plan and a 275M+ contact database. Success.ai is a cold email platform built around unlimited sending accounts, AI reply operators, and a 700M+ contact database, starting at $49/mo. Many teams use both tools together.
Key takeaways
- Apollo.io's Free plan grants 900 credits per seat per year, while its Basic plan at $49/mo grants 30,000 credits per seat per year upfront.
- Success.ai's Lite plan costs $49/mo and includes 2,000 tokens per month for reveals, enrichment and AI, plus 5K emails per month with warm-up on 10 accounts.
- Apollo.io lists a B2B contact and company database of 275M+ contacts, while Success.ai lists a 700M+ database with unlimited look-ups.
- Success.ai's Pro plan at $199/mo includes 150K emails per month plus advanced deliverability features.
- Apollo.io includes a built-in dialer with call recording, a feature that does not appear on Success.ai's published feature list.
Reviewed and updated September 2, 2026
Apollo.io vs Success.ai: Sales Engagement Platform vs Cold Email Platform Comparison
Apollo.io is a sales engagement platform; Success.ai is a cold email platform. Whether you need one, the other, or both depends on which part of the workflow you are buying for: multi-channel sales outreach and engagement tracking on one side, cold email outreach on the other. This guide lays out what each vendor publishes.
The Quick Answer
Apollo.io is a sales engagement platform for multi-channel sales outreach and engagement tracking; Success.ai is a cold email platform for cold email outreach. By each vendor's own wording, Apollo.io lists b2b contact and company database (275m+ contacts) and multi-channel sequences (email, phone, linkedin), and Success.ai lists ai sales & reply operators and 700m+ database with unlimited look-ups.
Apollo.io offers a lower entry point at $0/mo compared to Success.ai at $49/mo.
If your priority is coordinating outreach across email, phone, and social channels, Apollo.io is the one built for it; for sending campaigns that land in the inbox and generate replies, that is Success.ai. Many teams run one of each.
Understanding the Core Difference
Apollo.io is All-in-one sales intelligence and engagement platform combining a 275M+ contact database with automated sequences, email outreach, dialer, and AI-powered workflows for prospecting at scale.
Success.ai is Cold email outreach platform with unlimited email sending accounts, unlimited warmup, a unified inbox and a 700M+ contact B2B database. AI operators write campaigns and draft replies, and a token balance meters data reveals, enrichment and AI actions.
The two platforms take different approaches to solving the same core challenge.
Pricing Comparison
Free
Lite
Apollo.io Pricing (as of September 2026)
| Plan | Price | Contacts |
|---|---|---|
| Free | Free | 900 credits per seat per year, granted monthly |
| Basic | $49/mo | 30,000 credits per seat per year, granted upfront |
| Professional | $79/mo | 48,000 credits per seat per year, granted upfront |
| Organization | $119/mo | 72,000 credits per seat per year, granted upfront |
Source: Apollo.io Pricing
Success.ai Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Lite | $49/mo | 2,000 tokens /mo for reveals, enrichment & AI; 700M+ database with unlimited look-ups | 5K emails /mo with warm-up on 10 accounts |
| Starter | $99/mo | 6,000 tokens /mo for reveals, enrichment & AI; 700M+ database with unlimited look-ups | 50K emails /mo with unlimited warm-up |
| Pro | $199/mo | 10,000 tokens /mo + advanced search filters | 150K emails /mo + advanced deliverability |
| Enterprise | Contact Sales | Custom tokens & unlimited email sending | Custom tokens & unlimited email sending |
Source: Success.ai Pricing
Pricing Analysis
Apollo.io is more affordable at the entry level ($0/mo vs $49/mo). For teams with tight budgets or those just getting started with multi-channel sales outreach and engagement tracking and cold email outreach, this price difference matters.
Apollo.io includes a free tier, letting you test the platform before committing financially.
Features Breakdown
- B2B contact and company database (275M+ contacts)
- Multi-channel sequences (email, phone, LinkedIn)
- AI-powered email writing and optimization
- Built-in dialer with call recording
- Automated workflows and engagement rules
- A/B testing for email sequences
- and 4 more listed below
- AI Sales & Reply Operators
- 700M+ database with unlimited look-ups
- Unified InboxHub
- Data enrichment & email verification built in
- unlimited warm-up
- advanced search filters
- and 3 more listed below
Apollo.io Key Features
- B2B contact and company database (275M+ contacts)
- Multi-channel sequences (email, phone, LinkedIn)
- AI-powered email writing and optimization
- Built-in dialer with call recording
- Automated workflows and engagement rules
- A/B testing for email sequences
- Buying intent signals and job change alerts
- Advanced lead scoring and filtering
- Email deliverability tools and mailbox rotation
- Conversation intelligence (Professional+)
Success.ai Key Features
- AI Sales & Reply Operators
- 700M+ database with unlimited look-ups
- Unified InboxHub
- Data enrichment & email verification built in
- unlimited warm-up
- advanced search filters
- advanced deliverability
- Website Visitor identification
- 5 deal pipelines
The two lists below are a diff of each vendor's own feature list by exact wording, so a capability both tools offer can appear on either side under a different name.
Listed only by Apollo.io
- B2B contact and company database (275M+ contacts)
- Multi-channel sequences (email, phone, LinkedIn)
- AI-powered email writing and optimization
- Built-in dialer with call recording
- Automated workflows and engagement rules
- A/B testing for email sequences
- Buying intent signals and job change alerts
- Advanced lead scoring and filtering
- Email deliverability tools and mailbox rotation
- Conversation intelligence (Professional+)
Listed only by Success.ai
- AI Sales & Reply Operators
- 700M+ database with unlimited look-ups
- Unified InboxHub
- Data enrichment & email verification built in
- unlimited warm-up
- advanced search filters
- advanced deliverability
- Website Visitor identification
- 5 deal pipelines
Integration Ecosystem
Apollo.io Integrations
Apollo.io connects with: Salesforce, HubSpot, Pipedrive, Gmail, Microsoft Outlook, LinkedIn, Zapier, Slack, Sendgrid, Outreach, Salesloft, Webhooks API.
Success.ai Integrations
Success.ai connects with: Zapier, HubSpot, Salesforce, Pipedrive, Slack.
Shared Integrations
Both tools integrate with: Salesforce, HubSpot, Pipedrive, Zapier, Slack.
Integrations listed only by Apollo.io: Gmail, Microsoft Outlook, LinkedIn, Sendgrid, Outreach, Salesloft, Webhooks API.
Use Case Recommendations
Best Fit for Apollo.io
- Budget-conscious teams looking for an affordable sales engagement platform
- Teams that need a wide feature set (10 capabilities listed)
- Organizations with complex tech stacks needing broad integration support (12 integrations)
- Teams that want to start free and scale up as needs grow
Best Fit for Success.ai
- Budget-conscious teams looking for an affordable cold email platform
- Enterprise buyers who prefer custom pricing and dedicated support
- Sales teams running high-volume outbound email campaigns
- Agencies managing multiple client outreach programs
Feature Comparison Summary
| Feature | Apollo.io | Success.ai |
|---|---|---|
| Starting Price | Free | $49/mo |
| Top Tier Price | $119/mo | Contact Sales |
| Total Features Listed | 10 | 9 |
| Integrations | 12 | 5 |
| Founded | 2015 | N/A |
Getting Started Checklist
- Define your multi-channel sales outreach and engagement tracking and cold email outreach requirements and monthly budget
- Estimate your expected sequences and engagement actions and email sending volume to find the right tier
- List the integrations your team currently relies on
- Sign up for free trials or demos of both platforms
- Run a small test with each tool before making a commitment
- Evaluate the onboarding experience and support quality
Final Thoughts
Apollo.io serves the multi-channel sales outreach and engagement tracking side of an outbound stack and Success.ai the cold email outreach side. Apollo.io offers a more accessible entry point, while Success.ai starts at $49/mo. Your decision should weigh pricing against the specific features that matter most for your workflow.
Start with a trial of each to see which platform fits your team's daily process. The best tool is the one your team actually uses consistently.
Pricing and features verified as of September 2026. Visit Apollo.io and Success.ai for current information.
Frequently asked questions.
Frequently asked questions- Which is cheaper, Apollo.io or Success.ai?
- Apollo.io is cheaper at the entry level since it offers a free plan, while Success.ai's cheapest plan, Lite, costs $49/mo. Apollo.io's paid tiers start at $49/mo for Basic, $79/mo for Professional, and $119/mo for Organization.
- What's the main difference between Apollo.io and Success.ai?
- Apollo.io is a sales engagement platform for multi-channel outreach across email, phone, and LinkedIn with a 275M+ contact database. Success.ai is a cold email platform focused on unlimited sending accounts, unlimited warmup, a unified inbox, and a 700M+ contact database with AI operators for writing campaigns and drafting replies.
- Can I use Apollo.io and Success.ai together?
- Yes, the article notes that many teams run one of each since the two platforms serve different parts of the outreach workflow. Apollo.io handles multi-channel sales engagement and tracking, while Success.ai handles cold email campaigns and deliverability.
- How much does Success.ai's Enterprise plan cost?
- Success.ai's Enterprise plan is priced as Contact Sales rather than a listed monthly fee. It includes custom tokens for reveals, enrichment and AI actions, along with unlimited email sending.
- Does Apollo.io have a free plan?
- Yes, Apollo.io offers a Free plan that grants 900 credits per seat per year, distributed monthly. Its paid plans, Basic, Professional, and Organization, grant larger credit allowances upfront starting at $49/mo.
About the author.
Tim Carden is CMO / CTO at RevenueFlow, which builds and operates outbound revenue engines for B2B companies. Studied at McGill University.
Tim Carden · CMO / CTO
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