Leadspace Sidekick Chrome Extension

The contact data you need. The AI that turns it into pipeline.

Enterprise B2B intelligence on LinkedIn. Free to start.

Leadspace Sidekick Chrome Extension

2.5-10

2.5-10

x

x

Less expensive than
ZoomInfo & Apollo

10-15

10-15

x

x

Faster time-per-lead vs.

manual research

AI

AI

Fit scoring, outreach drafting & buying group intelligence built in

100

100

+

+

Technology categories in the data graph

What Sidekick Does

Three things no other tool does at this price.

Explore each one. Every capability is powered by 800M+ buyer identities — the same data graph used by Microsoft, Nvidia, and Salesforce.

The Foundation — Verified contact data, revealed instantly

Emails, direct dials, firmographics, tech stack. One click.

● Verified emails & direct phone numbers

Revealed on any LinkedIn profile

● Company firmographics & org hierarchy

Size, revenue, industry, parent and subsidiaries

● Technology stack 

— 100+ categories, continuously updated

— not batch-refreshed monthly

● ICP fit score in plain language 

Know instantly if they're worth your time, and exactly why

● One-click CRM push

Salesforce, HubSpot, Microsoft Dynamics. Always free.

● ICP fit score in plain language 

Know instantly if they're worth your time, and exactly why

● One-click CRM push

Salesforce, HubSpot, Microsoft Dynamics. Always free.

The Difference — AI that works the whole sales workflow

Fit scoring, outreach drafting, buying committee mapping, job change detection.

● Fit Scoring

Instant score against your Target Audience with a plain-language explanation.

● Outreach Drafting

Cold emails, LinkedIn messages, call scripts — personalised to the contact's profile.

● Buying Committee

Map Economic Buyer, Champion, Technical Evaluator, Procurement, Exec Sponsor. Gaps flagged.

● Account Research

Company briefing, recent signals, contact summary — all on demand, in context.

● Job Change Detection

Contact changed roles? Sidekick surfaces their new details and a suggested outreach angle.

● Ask Anything

Free-form AI conversation grounded in Leadspace data. No forms. No filters.

● Account Research

Company briefing, recent signals, contact summary — all on demand, in context.

● Job Change Detection

Contact changed roles? Sidekick surfaces their new details and a suggested outreach angle.

● Ask Anything

Free-form AI conversation grounded in Leadspace data. No forms. No filters.

The Multiplier — Find more people just like your best ones

LookaLikes turns one perfect contact into a full pipeline.

● Point to any contact who fits your Target Audience perfectly

● Sidekick searches 800M+ identities for people with the same role profile, company type, and fit signals

● Scored by role, function, seniority & company fit

● Verified contact data ready to reveal — add to list or push to CRM in one click

● Scored by role, function, seniority & company fit

● Verified contact data ready to reveal — add to list or push to CRM in one click

Learn More About Sidekick
Find email address free with Sidekick. Verified emails, direct dials, and account scoring in the profiles you already work.

Sidekick

Article

How Do You Find a Prospect's Email Address for Free?

You found the right person. Their title fits. Their company fits. Now you need their email address, and you have no idea where to start.

Most reps end up in the same loop. They try a few email format guesses. They run a Google search. They open two or three tools that promise free lookups and hit a paywall after the first result. Twenty minutes gone, and you still have nothing verified.

There is a better way to find an email address free of the guesswork and the wasted time. This post breaks down what actually works, what wastes your time, and how the sharpest reps get verified contact data without paying for a seat on a legacy platform.

Most free prospecting tools are just trials in disguise. See what makes a free tier real — verified contact data and fit scoring, right in your browser.

Sidekick

Article

What free prospecting tools actually stay free?

You found a free tool. You signed up, poked around, and it worked. Then thirty days later, the feature you actually needed moved behind a paywall. Sound familiar?


Free has a reputation for being temporary. In B2B sales, that reputation is mostly earned. Most tools that call themselves free are running a trial with a timer you can't see. The prospecting category is especially guilty of this. You get a handful of credits, a stripped-down dashboard, and a persistent upgrade banner that follows you everywhere.


But not every free tier is a trick. Some tools offer real, repeatable value without demanding a credit card the moment you start doing actual work. The difference lies in what the tool is built to do, who it's built for, and whether free is a real product or just a funnel.


Here's how to think about the free tools in your prospecting stack, what to watch for, and what actually holds up when you test it against a real quota.

Sidekick

Article

6sense vs Demandbase: What Each One Solves, and What Neither Does

You already know the pitch decks. Two platforms, two intent graphs, two claims to own the account-based motion.


The real question is not which vendor wins a bake-off. The question is what each platform actually solves inside your revenue stack, and what still breaks after you deploy one.


Most teams evaluating 6sense vs Demandbase are trying to fix an execution problem with an orchestration tool. That works until the underlying data fails. Then scoring drifts, routing misfires, and your reps stop trusting the priority list.


This post breaks down where each platform is strong, where both leave gaps, and what you need underneath them to make either one perform.

Evaluating ZoomInfo alternatives? Go beyond contact volume. See the architecture, identity resolution, and buying-group criteria enterprise GTM teams need.

Sidekick

Article

ZoomInfo Alternatives for Enterprise GTM Teams: What to Evaluate Beyond Contact Volume

Your contact database is not your data strategy. Yet most enterprise renewal conversations treat them as the same thing.


When your ZoomInfo contract comes up for review, the questions usually center on seat counts, credit limits, and record volume. Those questions miss the point. The real issue sits deeper in your stack, where records get matched, scored, routed, and pushed into automation.


If you lead RevOps, marketing operations, or sales operations at an enterprise, you already know the symptoms. Duplicate accounts across regions. Leads that never connect to the right buying group. Scoring models trained on stale attributes. Territory rules that fire against the wrong hierarchy.


This guide walks through how to evaluate Zoominfo alternatives against the architecture you operate, not the demo you sit through.

How We Compare

More intelligence. At a fraction of the cost.

See how Sidekick stacks up against ZoomInfo, Apollo, and Lusha across every capability that matters.

Full

Partial

None

Sidekick

ZoomInfo

Apollo

Lusha

PRICING

$0

Freemium — no CC

Paid from $49 / user per mo

No free tier

From ~$15K / year

Limited free tier

Paid from $49 / user per mo

No free tier

Paid from $49 / user per mo

CONTACT DATA

Verified emails

Direct / mobile phone

Firmographics & tech stack

Free tier

AI INTELLIGENCE

AI fit scoring

AI outreach drafting

Buying committee mapping

LookaLikes discovery

Job change detection

CRM & WORKFLOW

CRM & sales tool push

Salesforce, HubSpot, Outreach

Works on LinkedIn

DATA FOUNDATION

Identity graph size

800M+

270M+

Compiled DB

50M+

Continuously updated

Forrester recognized

Competitor data based on publicly available information as of 2026.

Pricing

Affordable outcomes. Not just affordable software.

Verified emails, direct dials, AI fit scoring, buying committee mapping, and AI outreach — all on LinkedIn. ZoomInfo, Apollo, and Lusha charge enterprise prices for what Sidekick delivers at 2.5–10× less.

FAQ

Common Questions

What browsers does Sidekick work on?

How do credits work?

What makes Sidekick different from Apollo or ZoomInfo?'

What is LookaLikes?

Does Sidekick integrate with my CRM?

How is the buying committee map built?