Apollo.io has built its reputation around being an affordable, all-in-one tool for sales intelligence and engagement.
That sounds appealing on the surface: one platform that handles data, sequencing, and outreach at a fraction of the cost of enterprise solutions.
But Apollo.io reviews highlight some of the downsides of this lower-cost solution: High bounce rates, inaccurate data, privacy concerns, deliverability problems, and even hacked accounts.
Here’s what go-to-market teams should consider when deciding how to invest in a GTM data platform.
Apollo.io Data Quality Reviews
Sales intelligence lives and dies by data quality. If the information is wrong, every email, call, and outreach motion is wasted. But Apollo reviews show that quality can be a common concern, even for some users who otherwise like the tool.
“I have been getting crazy bounces from email that they claim are verified … if the data is not accurate - it’s pretty much useless.” — Reddit
“Cons: Contact quality data, especially mobile numbers for EMEA.” — Capterra
When comparing Apollo vs ZoomInfo, it’s clear that ZoomInfo has built its business on being the most accurate B2B data provider in the market. Its proprietary identity graph continuously refreshes records across 420M+ contacts and 110M+ companies, ensuring that sales teams spend time selling, not scrubbing bad lists.
Apollo.io Privacy and Compliance Questions
Some online reviews complain about Apollo’s data-gathering and privacy-compliance practices.
“Apollo have somehow stumbled across my personal number … people are calling endlessly trying to sell me products and services.” — Reddit
“I checked, there’s never been any communication between us. They’ve scraped my info together and put it in their database.” — Reddit
In an era of GDPR, CCPA, and other tightening global data regulations, GTM teams are increasingly choosing to partner with providers that take compliance seriously.
ZoomInfo leads the industry in compliance. With GDPR and CCPA frameworks, SOC2 certification, and transparent opt-out processes, ZoomInfo ensures customers have a clean, defensible foundation for prospecting.
Apollo.io Deliverability Reviews
Apollo’s approach to data gathering and verification is also called into question by reviewers and users who say they get poor email deliverability results using the tool.
“I’ve seen zero results from email campaigns ... Even with very light email volume, emails go to spam.” — Trustpilot
Deliverability is the difference between real pipeline and wasted effort. ZoomInfo avoids this pitfall by pairing accurate data with trusted integrations and best-practice guardrails that protect sender reputation.
Apollo.io Usability and Coverage Reviews
While Apollo does garner positive reviews for its unified approach, other users lament that Apollo’s attempt to be a CRM, sequencer, and database leads to complexity and gaps.
“The platform is a bit dense, tough to figure out how to derive all the value possible.” — G2
“The phone data is unreliable, and without accurate contact information, the platform loses much of its value.” — Capterra
Apollo.io Support and Security Questions
Sales tools are mission-critical. But in Apollo.io reviews, users report that when things go wrong with Apollo, support is often lacking.
“My account got hacked & there has been no solution provided by their customer support team till now, it has been more than 3 months now.” — Capterra
“Reviewers frequently cite problems with customer service, describing it as unresponsive, unhelpful, and overly reliant on AI-driven support.” — Trustpilot
When a vendor can’t secure customer accounts or respond in a timely manner, trust erodes rapidly. ZoomInfo, by contrast, provides enterprise-grade security and responsive support trusted by the world’s largest sales and marketing teams.
Apollo.io Removed from LinkedIn
In early 2025, LinkedIn users began noticing that Apollo.io’s company page was no longer functioning. LinkedIn did not give any official reasoning, but commenters speculated that it may have been tied to terms of service violations around data collection.
A report on the situation by MarTech noted that Apollo offered a browser extension “that salespeople use to take data from LinkedIn.” Apollo’s CEO told MarTech that the removal didn’t impact the company’s core offering, but the action created intense conversation about Apollo’s tactics and trustworthiness.
“Apollo have been scraping and reselling LinkedIn data for ages, it’s rather a surprise they didn’t get in trouble before!” — Reddit
ZoomInfo, meanwhile, continues to invest in partnerships and integrations that reinforce its legitimacy and stability.
Is Apollo Worth It?
Apollo may be cheap, but users and reviewers caution that this lower price can come with hidden costs and risks that sales teams simply can’t afford.
ZoomInfo offers an Apollo alternative: accurate data, compliance-first practices, trusted deliverability, predictable pricing, and enterprise-grade support. That’s why 35,000+ companies, including the world’s fastest-growing and most respected brands, rely on ZoomInfo to fuel their go-to-market.
As many online reviews show, when pipeline, revenue, and reputation are on the line, sometimes lower cost isn’t worth the risk.