United StatesTechnology and telecom2025 – ongoing

Apollo

AI copywriter for outbound sales messages

Apollo's Claude-written sales messages lifted meeting bookings by 35%

WorkingVendor case studyVendor ↗

Problem

Apollo runs a sales engagement platform used by thousands of sales teams. Reps needed outbound messages that were personal to each prospect without hours of manual writing.

Approach

Apollo built Claude 3.5 Haiku into its platform in four places. It drafts outbound emails and follow-ups, combines Apollo data with outside signals such as news and hiring, matches each rep's voice and tone, and fills its template library with generated content.

Results

35%boost in meeting bookings with Claude messagingVendor case study[1]

76%preference rate for Claude-powered messages in blind testingVendor case study[1]

80%reduction in email writing time for sales reps at customer FLO EV ChargingVendor case study[1]

more than 5 millionmessaging actions per monthVendor case study[1]

Takeaway

Apollo ties the gain to message quality and to time saved by reps. The company did not say how the retention figure was measured.

Sources

Apollo accelerates outbound sales at scale with Claude
Anthropic1 Oct 2025Vendor publication

Source summaries

[1]Anthropic1 Oct 2025

Anthropic describes how Apollo uses Claude 3.5 Haiku for email drafting, signal aggregation, voice matching and template content. It reports a 35% boost in meeting bookings, a 76% preference in blind tests, an 80% cut in writing time at one customer, and more than 5 million messaging actions a month. The page carries no date; the Internet Archive first saved it on October 1, 2025.

Full details are in the original sources.

Added 4 Nov 2026 · Updated 4 Nov 2026