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Open-source alternatives to Apollo.io

Apollo.io does 4 jobs: finding companies and prospects to sell to, finding and verifying contact emails, buying signals and lead filters, automated cold email sequences and replies. Most projects replace one or two of them, so pick the job you actually need.

Quick answer

Facts checked 29 Oct 2026

We track one open-source alternative to Apollo.io, but it doesn't have confirmed commercial use, local running and no paid services together. Harvey covers all 4 Apollo.io jobs.

Your requirements

Where will it run?
Can I use it commercially?

Checks code and model licences. Includes projects with conditions, such as share-alike or revenue limits, marked amber. Unknowns are hidden.

Paid services needed?
What hardware do you have?
Operating system

1 project

Harvey

ethanplusai/harvey Actively maintained: 22 people committing in the last 12 months, active 8 of the last 12 weeks.
★ 3.9k active today

Local sales agent that finds small businesses, spots buying signals, writes and sends cold email and answers replies, using your Claude or ChatGPT plan.

Replaces Finding companies and prospects to sell to + Finding and verifying contact emails + Buying signals and lead filters + Automated cold email sequences and replies (partly)
Use it instead of paying for Apollo.io?
Personal use
Confirmed: Yes
For a business
Confirmed: Yes
Runs locally
Confirmed: Yes
Commercial use
Confirmed: Yes · MIT
Paid services
Partial: Optional only
Hardware
Partial: CPU works
Setup
Confirmed: Medium
8 of 8 facts sourced · checked 4d ago GitHub ↗ View details

Apollo.io alternatives compared

All 1 project, best ranked first, whatever the filters above. Unknown means we found no source, never a yes. Each project page links the source for every fact.

ProjectRuns locallyCommercial usePaid servicesSetupPlatformsStars
HarveyLocal sales agent that finds small businesses, spots buying signals, writes and sends cold email and answers replies, using your Claude or ChatGPT plan. Confirmed: Yes Confirmed: Yes · MIT Partial: Optional only Confirmed: Medium Windows, macOS, Linux ★ 3.9k

Common questions about Apollo.io alternatives

Is there a free, open-source alternative to Apollo.io?

Yes. Harvey is free to download and run on your own computer without paid API keys. It covers every job we list for Apollo.io.

Can I do finding companies and prospects to sell to locally without an Apollo.io subscription?

Yes, with Harvey (MIT). Check the hardware notes and licence conditions on each page before you start.

Can I do finding and verifying contact emails locally without an Apollo.io subscription?

Yes, with Harvey (MIT). Check the hardware notes and licence conditions on each page before you start.

Can I self-host an Apollo.io alternative?

Yes. Harvey can run on your own server. It documents a Docker setup.

Which Apollo.io alternatives run on Windows, macOS or Linux?

Windows: Harvey. macOS: Harvey. Linux: Harvey. The rest are web apps or servers, or their docs don't say which systems they support.

Which Apollo.io alternatives can I use commercially?

Confirmed: Harvey. This is not legal advice; read each licence.

Does any open-source project replace all of Apollo.io?

Harvey covers every job we list for Apollo.io.

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