
Apollo.io
Snov.io
Lusha
ZoomInfo
Clearbit
ZeroBounce
NeverBounce
Find all the email addresses related to a domain
OpenClaw
Marchward.ai
Aditya Protocol
Entire
Claude Code
Tines
CodeMaker AI
Human-in-the-Loop infra for AI Agents

Which is more popular?
Based on our record, Hunter.io seems to be a lot more popular than HumanLayer. While we know about 155 links to Hunter.io, we've tracked only 2 mentions of HumanLayer.
Website, pricing, platforms and company facts side by side.
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HL
HumanLayer
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| Website | hunter.io | humanlayer.dev |
| Pricing | — | |
| Company | Startup from France | — |
| Listed in |
What each product offers, as listed by its team.

Possible disadvantages
An editorial look at what each product does well and who it suits.

Overall verdict
Why this product is good
Recommended for
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
GTA Hunter Review
More videos
HumanLayer (CodeLayer): The MOST PRODUCTIVE AI Coder YET!
More videos
How often each product is chosen within a category, 0–100% relative to the other.

Share your experience with using Hunter.io and HumanLayer. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.

Hunter.io is an ideal outreach tool for finding and verifying prospects’ email addresses for outbound lead-generation campaigns.
If email addresses are important to you, it could be worth considering Apollo.io competitors like Hunter. With Hunter, you can find and outreach to prospects by email.
Gathers and Confirms Contact Details – Hunter.io uses advanced artificial intelligence to help you find, verify, and enhance the contact information for your potential customers or leads. This ensures you have...
We have no reviews of HumanLayer yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.

A few things worth flagging: PDL beats Clearbit's historical rates for US and Western European companies, but drops to ~52% match rate for Japan and South Korea specifically. Apollo underperforms on raw company matching but returns... - Source: dev.to / 5 months ago
The real conclusion I'd push back on from every vendor comparison I've read: there is no single tool that solves reverse lookup at 80%+ accuracy with clean data. The waterfall is the answer. The question is whether you build it yourself... - Source: dev.to / 5 months ago
Last year I ran the same LinkedIn Sales Navigator export through three enrichment APIs. Apollo matched 61% of the emails. Hunter.io matched 54%. An OSINT-first pipeline I'd built in n8n — pulling from public sources before hitting any... - Source: dev.to / 6 months ago
Dex Horthy, CEO of HumanLayer, put a name to the pattern in his AI Engineer conference talk "No Vibes Allowed" (AI Engineer World's Fair, 2024). The Research → Plan → Implement (RPI) framework is a structured workflow for AI-assisted... - Source: dev.to / 7 months ago
I realized I needed to change my approach. While I love the iterative learning process, I needed a way to give the agent a better foundation so our pair programming sessions actually made progress. I decided to try the RPI method... - Source: dev.to / 8 months ago
When comparing Hunter.io and HumanLayer, you can also consider the following products.

Apollo’s predictive prospecting, sales engagement, and actionable analytics help the teams to reach its full revenue potential.
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The AI that actually does things. Your personal assistant on any platform.
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Snov.io is a multichannel lead generation and outreach automation platform that helps B2B teams find qualified leads, automate email and LinkedIn campaigns, and manage deals in one built-in CRM.
Compare Snov.io to Hunter.io or HumanLayer:

Marchward is runtime authority for AI agents. Route every tool call through one key, then allow, gate, or block it at runtime with a hard cost cap, human approval on irreversible actions, and a tamper-evident audit log.
Compare Marchward.ai to Hunter.io or HumanLayer:


Route important AI agent, CI/CD, script, and operator actions through named human approval before execution.
Compare Aditya Protocol to Hunter.io or HumanLayer: