Compare people-data providers

You connect one people-data provider with your own API key. Every supported provider returns people and emails, but they differ in what extra data comes back (mobile numbers, LinkedIn headlines) and which filters they apply at the source versus after the fetch. This page compares all seven so you can pick the one that fits your targeting and your budget.

SignalsAPI charges no credits for people lookups — you only ever pay your own provider.

What you get

Provider	Email	Mobile phone	LinkedIn profile	Headline	Credentials to paste
Icypeas	✅ verified	—	✅	✅	API key
People Data Labs	✅ verified	—	✅	✅	API key
Prospeo	✅ verified	—	✅	✅	API key
Snov.io	✅ verified	—	partial	—	Client ID + Client Secret
Hunter	✅ verified	—	✅	—	API key
LeadMagic	✅ verified	✅	✅	—	API key
Tomba	✅ verified	—	✅	—	Key + Secret

Mobile phone is only returned by LeadMagic today, and only when Find phone numbers is enabled.
Headline is the person’s LinkedIn one-liner (e.g. “VP Engineering at Acme”). Providers that return it — Icypeas, People Data Labs, Prospeo — give you more context for AI personalization.
Every provider returns a LinkedIn profile URL for matched people (Snov.io returns it for some).

Where each filter runs

This is the part that affects your provider bill. A filter runs in one of two places:

At source — sent to the provider’s search API. People come back already filtered, so you only pay for matches.
After fetch — applied by SignalsAPI once the people are returned. Anything it removes is a person the provider already charged you to look up. In the persona form these are flagged “extra spend”.

A dash (—) means the provider doesn’t support that filter at all. SignalsAPI simply won’t offer it for that provider — it never silently drops your leads on a filter the provider can’t honor.

Provider	Title	Country	City	Skills	Department	Seniority
Icypeas	at source	after fetch	after fetch	at source	—	—
People Data Labs	at source	at source	at source	at source	—	—
Prospeo	at source	after fetch	after fetch	—	—	—
Snov.io	at source	—	—	—	—	—
Hunter	after fetch	—	—	—	at source	at source
LeadMagic	after fetch	—	after fetch	—	—	—
Tomba	after fetch	—	—	—	at source	—

Rule of thumb: the more filters a provider applies at source, the fewer credits you waste on people who get filtered out. People Data Labs filters the most at source (title, country, city, skills). Hunter and Tomba can’t filter by job title at source — they pull everyone in the chosen department and then match titles afterwards, so a broad title list costs more.

Provider details

Icypeas

People search with title and skills filtered at source; country and city matched after fetch. Returns LinkedIn profile and headline. Email verification is asynchronous (a short poll), then only verified emails are kept. One API key.

People Data Labs

The most filterable provider: title, country, city, and skills all run at source, so broad searches stay cheap. Returns LinkedIn profile and headline. One API key.

Prospeo

Title filtered at source; country and city after fetch. Returns LinkedIn profile and headline. One API key.

Snov.io

Title filtered at source. No country/city/skills filtering and no headline. Uses two secrets — a Client ID and Client Secret from your Snov.io API settings.

Hunter

Builds the people list from a company-domain search, so department and seniority are filtered at source from fixed lists, while job title is matched after fetch. Email comes back inline with each person. No country/city. One API key.

Department (pick any): executive, it, finance, management, sales, legal, support, hr, marketing, communication, education, design, health, operations
Seniority (pick any): junior, senior, executive

LeadMagic

The only provider that returns mobile phone numbers (see Find phone numbers). Email comes inline; title and city are matched after fetch. One API key.

Tomba

Domain-search based, with department filtered at source from a fixed list and job title matched after fetch. Email comes inline. Uses two secrets — a Key and a Secret.

Department (pick any): executive, it, finance, management, communication, marketing, sales, legal, hr, support, engineering

How to choose

You want mobile numbers → LeadMagic.
You filter by country or city → People Data Labs (the only one that does both at source). Icypeas, Prospeo and LeadMagic can still filter location, but after fetch (extra spend).
You target by department / seniority → Hunter (department + seniority) or Tomba (department) — filtered at source, so precise and credit-efficient.
You want LinkedIn headlines for AI-written outreach → Icypeas, People Data Labs, or Prospeo.
You already have an account somewhere → just connect it; all seven cover the core people + verified-email job.

Not sure which fits? Start a trial with one provider, run a search, and check the fetched-vs-disqualified breakdown on your leads — it shows exactly how many people were fetched and why any were dropped, so you can see result quality and credit use before committing.