Apollo

What it does

Apollo is a B2B contact database with outreach tools on top. The vendor says it holds more than 240 million contacts and 30 million companies. You search by role, company and buying signals, build lists, enrich records, then run email sequences and calls from the same workspace.

It also has a Chrome extension, a parallel dialler, an AI assistant, waterfall enrichment and deliverability tools such as domain warming, inbox rotation and reputation monitoring.

Why you would need it

Outbound breaks on bad data and on tool sprawl. One tool holds the list, another checks the emails, a third sends the sequence and a fourth does the calls. Every handoff loses something, and nobody knows which list produced the replies.

Apollo puts those steps in one place. You find the person, check the email, add them to a sequence and call them, and the results sit next to the record.

Where it fits

Apollo sits at the top of the funnel and feeds your CRM. The vendor lists more than 200 integrations and a layer called Apollo Anywhere that lets you work from your CRM, Gmail, your browser, ChatGPT and Claude. I mostly work with HubSpot today, so the first thing I check with any prospecting tool is how cleanly records sync to the CRM.

It replaces a separate list provider and, for many small teams, a separate sequencing tool. It does not replace the CRM.

What stands out

• The size and refresh of the database, which is the reason most people buy it.
• Sequences and a dialler in the same tool as the data.
• Deliverability tooling that helps keep outreach out of spam folders.
• An official MCP server, so Claude, ChatGPT and other clients can search, enrich and build sequences from a conversation.
• A free plan, so you can test the data before you commit.

My take

Connecting Gmail was painless. Within an hour I had pulled a targeted list and launched a five-step cadence. Verified emails kept bounce rates low and replies arrived within days.

As campaigns grew, I exported Apollo contacts into Lemlist when I needed personalised GIFs or video thumbnails, and into a LinkedIn tool for automated connection requests. Apollo's sequencing is solid but less creative than those niche platforms. For a team focused on email and phone it is an affordable pipeline engine. Add specialist tools only when your strategy needs richer personalisation or deeper analytics.

Verdict

Pick Apollo if you run outbound with a small team and want data and sequencing together. Skip it if your market is narrow and your contacts are better found by hand, or if you need advanced personalisation more than volume.