
Apollo
Apollo.io
★ #151 in ProductivityThe sales database that grew sequences and AI: find the person, write the line, send — Clay's more all-in-one cousin for teams that will not stitch ZoomInfo plus Outreach.
Product preview

Overview
Apollo is the sales stack in one login: data, sequence, AI line. Clay is the enrichment worksheet; Instantly is the sender; this tries to be both. Data quality is the fight. Credits vanish. For a team that will not buy ZoomInfo plus Outreach, it is the default. For a data team that wants a worksheet, Clay still wins.
Pros / Cons
Pros
- Data plus sequence in one product
- AI lines without a second writer
- Chrome find-and-add
- Freemium door into B2B contacts
Cons
- Data quality is the usual fight
- Credits vanish on real volume
- Not Clay if you want a worksheet OS
Who it's for
Finding and sequencing a persona in one tab
AI first-lines on Apollo data
Skipping ZoomInfo plus Outreach
Chrome prospecting into a sequence
Bottom line
The all-in-one sales tab — buy Apollo to avoid two vendors, buy Clay if the worksheet is the product.
Key Features
Tags
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Frequently asked questions
What is Apollo?
Apollo is a Productivity tool developed by Apollo.io. The company was founded in 2015 and is headquartered in Covina, USA. The sales database that grew sequences and AI: find the person, write the line, send — Clay's more all-in-one cousin for teams that will not stitch ZoomInfo plus Outreach.
Is Apollo free?
Apollo uses a freemium model: a free tier is available, and paid plans unlock more usage and advanced features.
Is Apollo open source?
No — Apollo is proprietary software.
What are the best alternatives to Apollo?
Notable Productivity alternatives include Notion AI, Grammarly, Canva AI. Browse all 4 tools in our Productivity category for a full overview.
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Basic Info
- Pricing
- Freemium
- Rating
- ★ 4.4 (8,900 reviews) Ratings explained
- Platforms
- WebAPIChrome
- Founded
- 2015
- Headquarters
- Covina, USA
- Last verified
- 2026-09-11