**TL;DR: [Apollo](/content/c/apollo/index.html) is evolving from a PLG sales tool into an all-in-one GTM platform with CRM against the insurgent threat of [Clay](/content/c/clay/index.html) and the incumbent juggernaut HubSpot. [Sacra estimates that Apollo.io hit $150M ARR in May 2025, with $134M ARR at year-end 2024, up 40% year-over-year](/content/research/apollo-revenue-growth-valuation/index.html). For more, check out [our full report](/content/c/apollo/index.html) and [dataset](/content/research/apollo-revenue-growth-valuation/index.html) on Apollo.**

[We last covered Apollo in January 2024 as it crossed $100M ARR, growing 100% YoY](/content/research/apollo-at-100m-arr/index.html) with its vertically integrated data & outbound sales platform.

Here’s our [Apollo](/content/c/apollo/index.html) update with key points via Sacra AI:

- [Sacra estimates that Apollo.io hit $150M ARR at the end of May 2025, growing 40% YoY in 2004 to reach $134M ARR, up from $96M ARR at the end of 2023](/content/research/apollo-revenue-growth-valuation/index.html), giving it a ~10x forward revenue multiple off its August 2023 Series D led by Bain Capital Ventures (Merritt Hummer) which valued the company at $1.6B.
- Most noticeably over the last 12 months, the contact data that [Apollo](/content/c/apollo/index.html) weaponized [to disrupt data brokers like Dun & Bradstreet (NYSE: DNB) and enterprise SaaS like Zoominfo (NASDAQ: GTM)](/content/research/apollo-at-100m-arr/index.html)—by making available via self-serve what previously required large up front payments—has itself gotten [commodified by AI-powered scraping](/content/research/matt-sornson-clearbit-future-api-platform-company/#_b35ff313-91c2-5b8f-bad3-e62f92556712/index.html), with [GTM teams shifting budget from volume-based cold outreach](/content/research/austin-hughes-unify-warm-outbound-gtm/#_d1100560-37f0-5c3a-bd0f-3dbffb1e122c/index.html) to [signal & behavior-triggered, personalized engagement](/content/research/austin-hughes-unify-warm-outbound-gtm/#_c37d3fc2-b2db-5047-84e2-b1267251c8a3/index.html) via AI sales research tools like [Clay](/content/c/clay/index.html) ( [$30M ARR in 2024, growing 500% YoY](/content/research/clay-revenue-growth-valuation/index.html)).
- [Apollo](/content/c/apollo/index.html) has responded with a wave of launches including Scores & Signals ( [Clay](/content/c/clay/index.html)), Smart Meeting Suite ( [Gong](/content/c/gong/index.html) & [Calendly](/content/c/calendly/index.html)) and Workflows ( [Zapier](/content/c/zapier/index.html)), bundling together everything that GTM teams need with a lightweight CRM that [positions Apollo as an all-in-one & system of record for SMBs](/content/research/apollo-at-100m-arr/index.html), increases stickiness & drives seat expansion and makes it competitive against HubSpot (NYSE: HUBS).

### Additional Insights
For more, check out this other research from our platform:

- [Apollo](/content/c/apollo/index.html) ( [dataset](/content/research/apollo-revenue-growth-valuation/index.html))
- [Clay](/content/c/clay/index.html) ( [dataset](/content/research/clay-revenue-growth-valuation/index.html))
- [Gong](/content/c/gong/index.html) ( [dataset](/content/research/gong-revenue-growth-valuation/index.html))
- [Calendly](/content/c/calendly/index.html) ( [dataset](/content/research/calendly-revenue-growth-valuation/index.html))
- [Zapier](/content/c/zapier/index.html) ( [dataset](/content/research/zapier-revenue-growth-valuation/index.html))
- [Outreach](/content/c/outreach/index.html) ( [dataset](/content/research/outreach-revenue-growth-valuation/index.html))
- [6sense](/content/c/6sense/index.html) ( [dataset](/content/research/6sense-revenue-growth-valuation/index.html))
- [Otter](/content/c/otter/index.html) ( [dataset](/content/research/otter-revenue-growth-valuation/index.html))
- [Matt Sornson, co-founder & ex-CEO at Clearbit, on vertically integrated data and workflow tools in sales and marketing](/content/research/matt-sornson-clearbit-future-api-platform-company/index.html)
- [Austin Hughes, CEO and co-founder of Unify, on the death of the SDR](/content/research/austin-hughes-unify-warm-outbound-gtm/index.html)
- [Nico Ferreyra, CEO of Default, on building an end-to-end inbound sales platform](/content/research/nico-ferreyra-default-lead-routing-inbound-sales/index.html)
- [Bob Moore, CEO and co-founder of Crossbeam, on ecosystem-led growth](/content/research/bob-moore-crossbeam-partnerships-ecosystem/index.html)
- [How AI is transforming B2B SaaS](/content/research/ai-b2b-saas/index.html)
- [Gongification of SaaS](/content/research/gongification-of-saas/index.html)
- [How Clearbit sold to HubSpot](/content/research/how-clearbit-sold-to-hubspot/index.html)