MakeSuccessOnline.

Apollo.io

275M+ B2B contact database + sales engagement — pay once, outreach many.

4.5/5 Free + paid · free plan Lead Gen & Outbound
Visit website → Try free
Best for B2B sales teams
Pricing Free + paid
Setup time Under 30 min
Learning curve Moderate
Support Email, chat, deliverability specialists
Company Apollo.io
Launched 2015

About Apollo.io

Apollo.io is a Lead Gen & Outbound tool most teams land on when they outgrow the free alternatives. The strengths show up in two places — 275M+ contacts at 1/3 ZoomInfo's price, and email sequences + call cadences included. Where you'll spend your time: Contact + company search and Sequences. There's a free plan to explore before paying, with paid upgrades when you need them. The default B2B sales database + engagement tool for most SMB and mid-market teams.

Available on

Web appChrome extensionAPIGmail / Outlook plugins

Integrates with

SalesforceHubSpotGmailOutlookZapierSlackZoomOutreach

Who it's for

A quick filter before you spend time on Apollo.io — read both sides before committing.

Use it if…

  • B2B sales teams needing contact data + outreach
  • Startup founders doing their own outbound
  • RevOps teams building ICP lists

Skip it if…

  • Pure B2C or local businesses
  • Companies with strict data compliance (GDPR concerns)
  • Enterprise teams needing ZoomInfo's data depth

Pros and cons

Pros

  • 275M+ contacts at 1/3 ZoomInfo's price
  • Email sequences + call cadences included
  • Decent free tier
  • Hits the core lead gen & outbound workflow without forcing a hunt for second tools
  • Pricing lands in the right band for its target buyer

Cons

  • Data accuracy slightly below ZoomInfo
  • Reaches API rate limits on big enrichment runs
  • Unlimited email claims come with send caps
  • Not the cheapest option in the category — the free alternatives cover basics
  • Advanced features sit behind higher-tier plans most small teams won't need

Features

The capabilities you actually get when you sign up for Apollo.io.

  1. 01

    Contact + company search

    275M+ records with filters for role, industry, tech stack

  2. 02

    Sequences

    Multi-step email + task cadences

  3. 03

    Buyer intent

    Account-level intent data based on signals

  4. 04

    Core workspace

    The main editor or dashboard where day-to-day lead gen & outbound work happens

  5. 05

    Integrations hub

    Connects to the tools your stack already uses so data doesn't live in silos

  6. 06

    Reporting and dashboards

    Built-in reports and exportable dashboards for stakeholder reviews

Pricing

A free plan to start, then paid tiers for the full set of features.

Free

$0

  • Unlimited emails
  • 10K email credits/mo
  • Basic sequences

Basic

$49/user /mo

  • 25K emails/mo
  • 10K phone credits
  • Email automation

Professional

$79/user /mo

  • 100K emails/mo
  • A/B testing
  • LinkedIn integration

Frequently asked questions

What people usually want to know before signing up for Apollo.io.

How accurate is Apollo's data?

~75-80% accurate on emails; refreshed monthly. ZoomInfo is slightly higher.

Does the free tier really give unlimited emails?

Yes, with send caps (~250/day) and basic sequences only.

Is cold email still legal in 2026?

In the US and UK yes, with an opt-out link and physical address. In the EU, legitimate interest justifies B2B contact, but documentation matters.

How many emails per inbox per day is safe?

40–60 is the current ceiling for a warmed Google Workspace inbox. More than 100/day is a deliverability trap, not a growth lever.

Will this get my main domain blacklisted?

Only if you ignore warm-up and reply monitoring. Use a secondary domain pointed to your main site to keep risk off the primary.

Bottom line

Should you use Apollo.io?

The default B2B sales database + engagement tool for most SMB and mid-market teams. Enterprise still goes ZoomInfo.

Visit website → Try free