What is Apollo.io?

Apollo.io is a sales engagement platform built around a large B2B contact database, with AI layered on top to research accounts, draft personalised outreach, score leads and run multi-step sequences across email and calls. Where many sales tools specialise in either "find contacts" or "send outreach," Apollo bundles both into one product, which is why it has become a default starting stack for small sales and growth teams that don't want to stitch together a data provider, a sequencer and an enrichment tool separately.

Who it is for

Apollo suits small-to-mid-size sales teams, founders doing their own outbound, and growth or RevOps teams that need a contact database plus a way to act on it without buying three separate tools. It is a reasonable fit for anyone starting outbound from zero, since the free plan includes real database access. It is a weaker fit for teams that already have a mature, best-of-breed stack (a dedicated data provider plus a dedicated sequencer plus a dedicated CRM), since Apollo's individual pieces are each good rather than best-in-class, and large teams may outgrow its data accuracy for specialised markets.

Key features

Contact and company database with search filters by role, industry, technology used, funding stage and more
AI account research that summarises a company's news, hiring and tech stack before a rep reaches out
AI-personalised email writing, generating first-draft outreach based on the prospect's profile rather than a generic template
Lead scoring to prioritise which contacts are most likely to convert
Multi-step sequences combining email, calls and tasks, with built-in dialer
Chrome extension for pulling contact data directly from LinkedIn and company sites into Apollo

Pricing

Apollo has a free plan with limited credits for smaller-scale prospecting. Paid plans on apollo.io are billed per user: Basic starts at $49/user/month (annual billing; $59 billed monthly), Professional at $79/user/month annual, and Organization at $119/user/month annual with a 3-seat minimum. Each tier includes a monthly allotment of data credits, and heavier usage requires purchasing add-on credits, so actual monthly cost depends on sending volume as well as seat count. Confirm current tiers and credit allowances on apollo.io/pricing, since sales-tool vendors adjust credit systems often.

Strengths

Data and outreach in one subscription removes the integration work of connecting a separate database tool to a separate sequencer
AI personalisation produces usable first-draft emails rather than generic mail-merge copy, saving real rep time
A genuine free plan lets a solo founder or small team start outbound without upfront cost

Weaknesses

Contact data accuracy varies by market and role seniority — expect to verify emails for high-value targets rather than trusting the database blindly
The credit system adds a layer of cost unpredictability on top of the seat price, especially once a team scales sending volume
Power users doing highly specialised or international prospecting may find dedicated data providers more accurate for their specific niche

Getting started

Sign up for the free plan at apollo.io, connect your email for sending, and use the search filters to build your first list of target contacts. The Chrome extension is worth installing early if you plan to prospect from LinkedIn directly.

Verdict

Apollo.io is a strong default choice for small teams that want data and outreach in one place rather than assembling a stack from scratch — see more options in AI Customer Support & Sales. If your priority is specifically enrichment and lead lists rather than sequencing, compare it against Clay; if support-side ticket automation is the bigger need, look at Intercom instead.