Cognism | Blog | Connect

9 Best AI Chrome Extensions For Sales And Marketers in 2025

Written by Daisy Shevlin | Jul 15, 2025 3:48:24 PM

Boost productivity, personalise outreach, and speed up your workflow using these AI-powered sales and marketing Chrome extensions.

AI Chrome extensions transform the work of sales and marketing professionals by directly integrating intelligent automation or insights into your browser. 

These tools can be both powerful and convenient. In this post, we’ll look at the nine best AI Chrome extensions to help your team tackle everything from prospect data enrichment to email copy optimisation in 2025. 

1. Cognism Sales Companion

Cognism Sales Companion is a browser extension that overlays on LinkedIn, Sales Navigator, and company websites. It provides real-time contact and account insights for streamlined prospecting and data enrichment. 

This AI-powered tool is your personalised sales assistant, helping you find the right prospects and engage with ready-to-buy decision-makers.

Key AI features of Sales Companion’s platform:

  • AI Search functionality based on your ideal target list to speed up prospecting. 
  • Cortex AI-powered insights for ICP fit check and prospect data like business model, revenue drivers, and competitors. 
  • Personalised recommendations based on your target market and personas.

 

Benefits:

  • Cortex AI, surfaces company insights with no prompts needed for an ICP fit check, and a summary that shows their business model, competitors, strategy & direction.
  • Phone-verified mobile numbers with Diamond Data® that deliver unparalleled accuracy (connect with 87% of your list), reaching decision makers more often. 
  • Seamless integrations with CRM and sales engagement tools, allowing you to update missing records directly from Sales Companion. 
  • GDPR and CCPA compliance with comprehensive DNC screening across multiple countries.  

2. Lavender

Lavender is an AI sales email coach that helps sales and marketing teams write stronger email campaigns, including cold email outreach. This Chrome extension provides real-time feedback and personalisation suggestions to improve outreach campaigns.  

Key AI Features:

  • Email Coach that grades your email and gives tips to improve, using generative AI and data from millions of emails.
  • Personalisation assistant that brings prospect data directly to your inbox and suggests ways to personalise based on personality-based insights.
  • AI-powered content generation for email drafts and replies for select plans.
  • Integrates with Gmail, Outlook, and popular sales engagement platforms. 

Benefits:

  • Personalised outreach can increase open rates, engagement, booked meetings, and conversions. 
  • Real-time coaching can adapt to evolving email behaviours using generative AI.
  • SOC2-certified and GDPR-compliant data handling. 

3. Grammarly

Grammarly's AI-powered writing assistant has become indispensable for sales and marketing professionals to communicate clearly and professionally. For instance, I’ve used my Grammarly extension to edit this page!

Its advanced AI algorithms provide real-time suggestions for improving sentence structure, word choice, and readability. Its Chrome extension allows you to use Grammarly to proofread content in your email, Google Docs, and more. 

Key AI Features:

  • Real-time grammar, spelling, and punctuation corrections.
  • AI-driven tone detection and adjustment suggestions.
  • Style and clarity improvements for professional communication.
  • Brand voice consistency across all communications.

Benefits:

  • Ensures all customer-facing communications are polished and professional.
  • Reduces time spent proofreading and editing.
  • Helps maintain consistent messaging across teams.
  • Available across all writing platforms including Google, LinkedIn, and CRMs.

4. Crystal

Crystal uses AI to analyse publicly available data and provide personality insights about your prospects and customers. This Chrome extension helps sales and marketing teams tailor their communication style for maximum impact.

Key AI Features:

  • AI-powered personality analysis based on digital footprints
  • Communication style recommendations with specific do's and don'ts.
  • Real-time insights while browsing LinkedIn profiles or company websites.
  • Predictive analytics for communication preferences.
  • Integration into sales workflow tools. 

Benefits:

  • Personalise outreach based on personality types and communication preferences.
  • Improve response rates by adapting your messaging style.
  • Build stronger relationships through personality-aware communication.
  • Reduce guesswork in prospect engagement.

5. Seamless.AI

Seamless.ai describes itself as a search engine for B2B sales leads

This AI-powered tool revolutionises lead generation by providing verified contact information in real-time, and its Chrome extension can help you access prospect contact data on company websites. 

Key AI Features:

  • AI-powered lead discovery and contact verification.
  • Access cell phone numbers, emails, and direct dial information. 
  • Intent data and technographic insights.
  • Automated list building with AI-suggested prospects.
  • Works on LinkedIn, Sales Navigator, and B2B websites. 

Benefits:

  • Find contact information for decision-makers on B2B websites and use LinkedIn profiles to provide verified phone numbers and email addresses.
  • Valuable sales intelligence, including intent data, tech stack information, and pressing business needs insights.
  • One-click CRM integration with Salesforce, HubSpot, and other platforms.
  • Significant time savings in prospecting and research.

6. Fireflies

Fireflies AI transforms meeting productivity by automatically transcribing, summarising, and analysing sales calls and meetings. This Chrome extension ensures no critical information is lost during prospect interactions.

Key AI Features:

  • Real-time transcription with speaker identification.
  • AI-generated meeting summaries and action items.
  • Sentiment analysis and conversation insights.
  • Automated CRM updates with call notes and outcomes.
  • Integrations with major video conferencing platforms and CRM systems. 

Benefits:

  • Never miss important details from prospect conversations.
  • Automatically capture action items and follow-up tasks.
  • Analyse conversation patterns to improve sales techniques.
  • Share meeting insights with team members instantly.

7. Wordtune

Wordtune is an AI writer assistant that helps rephrase sentences, improve clarity, and adjust tone. The Chrome extension allows you to enhance your copy anywhere you create written content online. 

Key AI Features:

  • AI-powered sentence rephrasing and tone adjustment.
  • Context-aware writing suggestions.
  • Real-time clarity and engagement improvements.
  • Multiple writing style options for different audiences.
  • Improve web content, emails, and social media campaigns as you write it.

Benefits:

  • Enhances your writing by providing real-time suggestions, making your content more engaging and tailored to your audience.
  • Improves email response rates through better messaging.
  • Saves time in content creation and editing.
  • Ensures consistent, professional communication.

8. ChatGPT for Google

This ChatGPT Chrome extension can funnel powerful AI capabilities directly into your Google search results. It can provide instant insights and content generation while researching prospects or creating marketing materials.

As a note, ChatGPT, like all AI tools, is not infallible, and hallucinations sometimes occur. Data verification can ensure you’re working with accurate information, especially on high-value tasks or accounts. 

Key AI Features:

  • Real-time AI responses alongside Google search results.
  • Content generation and research assistance.
  • Query refinement and follow-up questions.
  • Multiple AI model access for different use cases.
  • Instant answers on multiple web browsers.

Benefits:

  • Get instant AI insights while researching prospects or markets.
  • Generate content ideas and outlines without leaving search results.
  • Improve research efficiency and depth.
  • Access powerful AI capabilities within existing workflows.
  • Speed up research processes. 

9. Apollo.io

Apollo enables users to find contact info, connect with buyers, track emails, and more. Their Chrome extension can help you find contact data while browsing online and personalise emails for improved outreach. 

Compare: Cognism vs Apollo to help make your decision.

Key AI Features:

  • AI-powered lead scoring and prioritisation.
  • Intelligent email sequence automation.
  • Predictive analytics for prospect engagement.
  • AI-driven contact and company data enrichment.
  • Email personalisation and contact data access with the Chrome extension. 

Benefits:

  • Streamline prospecting with AI-suggested contacts and companies.
  • Automate follow-up sequences with intelligent timing.
  • Improve conversion rates through better lead scoring.
  • Access a comprehensive B2B database with AI-enhanced search. 

What are AI Chrome extensions?

AI-powered Chrome extensions are browser extensions that use artificial intelligence to help you accomplish specific tasks. They enhance productivity through automation, streamline workflows, or provide access to vital information quickly. 

These extensions for sales and marketing professionals bring powerful AI capabilities to everyday tools like LinkedIn, Gmail, CRM systems, and company websites.

The key advantage of AI Chrome extensions is their ability to work seamlessly within existing workflows. Rather than switching between multiple tools, sales and marketing professionals can directly access AI-powered features where they’re already working, whether researching prospects on LinkedIn, writing emails in Gmail or updating records in their CRM.

What are the best AI Chrome extensions for sales?

The best AI Chrome extensions for sales include:

  • Cognism Sales Companion's AI finds decision makers, conducts company research, and enriches data.
  • Lavender for email optimisation.
  • Crystal for personality insights.
  • Seamless.AI for lead generation. 

These tools help sales professionals find better prospects, personalise outreach, and improve conversion rates through AI-powered insights and automation. However, the true “best” tools will depend on your exact needs and current bottlenecks. 

How can AI Chrome extensions help marketers?

AI Chrome extensions help marketers by automating content creation, optimising copy for better engagement, providing SEO insights, and streamlining research processes. 

For example, Cognism helps you create AI ABM workflows through Cortex AI research to generate personalised landing pages for your campaigns and message tests.

Tools like Grammarly ensure professional communication, and Wordtune improves messaging clarity. These extensions save time while improving the quality and effectiveness of marketing efforts.

Are there free AI Chrome extensions?

Yes, many AI Chrome extensions offer free plans or features. For example:

Grammarly’s free plan includes proofreading, tone assessment, and 100 generative AI prompts a month.

However, advanced features and unlimited usage typically require paid subscriptions. Most tools offer free trials or demos to test functionality before committing to paid plans.

Do AI Chrome extensions integrate with CRM systems?

Some AI Chrome extensions integrate seamlessly with popular CRM systems like Salesforce, HubSpot, Pipedrive, and Microsoft Dynamics. These integrations allow automatic data sync, workflow automation, and enhanced data enrichment within your existing sales and marketing stack.

However, not all extensions integrate with all or most CRM systems. Check any extensions you’re considering to see if they integrate with your tech stack. 

Close more deals with AI Chrome extensions

The sales and marketing professionals who embrace AI Chrome extensions today will have a significant competitive advantage.

Start with one or two tools that address your most pressing challenges. That may be finding better prospects, optimising email copy, or streamlining workflows.

The magic happens when you combine these extensions strategically over time. Use Cognism Sales Companion to find prospects and generate in-depth company research at the click of a button.

Click to book your Cognism demo today, 👇 someone from the team will show you our AI in action.