Data isn't slowing down, and neither is the headache of keeping it clean, current, and useful. CRM data enrichment tools exist to solve exactly that problem, and as databases keep growing, so does the list of platforms promising to fix them.

Picking the right one is where things get tricky. Choose wrong and you're left with a wasted budget and a CRM that's somehow more chaotic than before. Stick the landing, and your sales, marketing, and RevOps teams finally have data they can trust.To save you the headache, we've put together this in-depth guide to the 8 best CRM data enrichment tools available today — breaking down core features, G2 ratings, pricing, and key pros and cons.

PSST! Want to skip ahead?

Findymail CRM Datacare takes the top spot on this list for good reason. While many tools here excel in a specific niche or try to do everything at once, Findymail CRM Datacare is a focused data enrichment engine that keeps your CRM clean and ensures only verified, validated contact data makes the cut.

Curious to see it in action? Our CRM data experts are happy to walk you through the product and run a free CRM health check to surface any data issues you might not even know you have.
TL;DR — The 8 Best CRM Data Enrichment Tools

1. Findymail CRM Datacare - Best for always-on CRM enrichment with guaranteed verified data
2. Clay - Best for teams that want full control over custom enrichment workflows and multi-source data.
3. Freckle.io - Best Clay alternative for non-technical teams
4. UpLead
5. Cognism
6. Apollo.io
7. ZoomInfo
8. Lusha

What Is CRM Data Enrichment?

Data enrichment is the process of enhancing existing records in your CRM with additional, accurate, and actionable information. Rather than relying on incomplete or outdated contacts, enrichment tools automatically fill in the gaps,  and keep refreshing that data so your database doesn't quietly rot over time.

At a high level, CRM data enrichment typically covers:

  • Contact enrichment: Verified emails, direct dials, LinkedIn profiles, and up-to-date job titles.
  • Company enrichment: Firmographic and technographic data (think industry, headcount, revenue, location, and tech stack).
  • Intent and buying signals: Active research behavior, topic interest, funding events, hiring trends, and technology changes that hint at when a prospect is ready to buy.
  • Job change tracking: Alerts when contacts switch roles or companies, surfacing timely expansion and re-engagement opportunities.

And that's just scratching the surface, modern enrichment tools can pull in a surprisingly wide range of data points depending on your use case.

CRM Data Enrichment vs. Data Cleansing vs. Data Hygiene

These three terms get thrown around like they're interchangeable, they're not. Here's the quick breakdown:

  • Data Enrichment adds new, valuable information to your CRM records.
  • Data Cleansing corrects inaccurate, incomplete, or duplicate data.
  • Data Hygiene maintains data quality over time through ongoing processes.

Think of it this way: data cleansing fixes the mess, data hygiene keeps it tidy, and data enrichment makes your CRM actually powerful. You need all three, but enrichment is where the real competitive edge lives.

8 Best CRM Data Enrichment Tools

Alright, enough theory. Let's get to the part you actually came here for. We've cut through the noise and narrowed it down to the 8 best CRM data enrichment tools on the market today. Some are household names, some are hidden gems, and all of them beat a messy spreadsheet.

1. Findymail CRM Datacare — Best for Always-On CRM Enrichment with Guaranteed Verified Data

Findymail CRM Datacare — Best for Always-On CRM Enrichment with Guaranteed Verified Data
Source: Findymail CRM Datacare

Overview:

As an always-on enrichment tool, Findymail CRM Datacare connects natively to your CRM and keeps it clean, accurate, and continuously up to date. Built on Findymail's proprietary verification algorithm, it delivers verified contact data in real time with the same sub-5% bounce rate guarantee the core platform is known for.

Findymail CRM Datacare enriches records as they're created, fills gaps in existing contacts, tracks job changes, and merges duplicates automatically. The result is a CRM that stays healthy with minimal oversight.

What makes Datacare particularly practical is its built-in safety controls:

  • Preview Mode: Review all proposed changes before anything updates.
  • No Override Default: Fills empty fields only, leaving existing data untouched unless you allow otherwise.
  • Full Rollback: Undo any change at any time.
  • Segment Controls: Choose exactly which parts of your CRM to enrich.

Datacare is also SOC 2 compliant, so your data is handled to enterprise-grade security standards throughout.

Key Features

  • Auto-Enrichment: Automatically populates new and existing CRM records with accurate, up-to-date contact and company data.
  • Job Change Tracker: Get notified the moment a prospect or customer switches companies, so you can reach out while the timing is still right.
  • Verified Contact Data: Removes invalid emails and replaces them with fresh, verified contact info, backed by a bounce rate under 5%.
  • Data Cleansing & Deduplication: Continuously updates outdated records, merges duplicates, and keeps your CRM aligned in real time.
  • Native CRM Integration: Works directly inside all major CRMs with zero overlays. Datacare runs quietly in the background.
  • Built-in Safety Controls: Preview changes before they're applied, fill only empty fields by default, roll back any update at any time, and choose exactly which CRM segments to enrich. Enrichment always fits your workflows.

Ratings:

Findymail CRM Datacare Ratings
Source: Findymail CRM Datacare
  • G2: 4.9/5 (56)
  • Capterra: 4.9/5 (7)

Pros:

  • Always-on enrichment keeps your database continuously clean without lifting a finger.
  • Verified contact data with a guaranteed bounce rate of 5% or less.
  • Real-time job change tracking so you can act on warm leads the moment they move.
  • Native integrations with all major CRMs, clean data, zero manual work.

Cons:

  • Prioritizes accuracy and automation over highly custom enrichment workflows, so if you're looking to get experimental with your data, you may hit some limits.

Customer reviews:

Pricing Plans:

Findymail CRM Datacare Pricing Plans
Source Findymail CRM Datacare

Datacare is priced by database size (not per enriched record), so no hidden fees, no "out of credits" panic. Plans start at:

  • $1,188/year: Enrichment only
  • $1,782/year: Enrichment + Job Tracking
Get a Free CRM Health Check!

When you book a call or demo, we won't just show slides. We securely connect Datacare to your CRM (without enriching or modifying sensitive data) and run a live health check to pinpoint exactly what’s broken, and how Findymail CRM Datacare can fix it.

2. Clay — Best for Custom Enrichment Workflows & Multi-Source Data

Clay — Best for Custom Enrichment Workflows & Multi-Source Data
Source: Clay

Overview:

Clay is less of a CRM enrichment tool and more of a data hub with an outreach engine bolted on. Built for teams that want granular control over how, where, and from whom they pull data, Clay lets you enrich records from 150+ data sources and act on that data without ever leaving the platform.

The real differentiator is flexibility. Clay lets you build custom enrichment waterfalls, deploy AI agents to scrape the web for signals that traditional databases miss, and automate personalized outreach, all in one place. It's the tool that power users swear by and beginners quietly panic over.

Key Features:

  • Claygent (AI research assistant): An AI agent that finds unique company and contact data from across the web. It can read websites, complete forms, and surface insights traditional databases miss.
  • Data Enrichment: Pulls from 150+ data sources to fill in missing details like company size, tech stack, social data, and verified contact information.
  • Custom waterfall configuration: Build your own enrichment waterfalls by choosing which providers run first, helping balance coverage, cost, and quality.
  • CRM & workflow integrations: Syncs seamlessly with tools like HubSpot, Salesforce, and Zapier so your enriched data flows exactly where it needs to go.

Ratings:

Clay Ratings
Source: Clay
  • G2: 4.7/5 (185)
  • Capterra: N/A

Pros:

  • Findymail is one of Clay’s premium data providers, giving teams access to highly verified contact data within workflows.
  • Built for sales and growth teams, Clay makes it straightforward to build highly targeted prospect lists quickly by pulling from multiple data sources in one place.
  • Flexible enough to support custom workflows, multiple data source connections, and direct CRM pushes — without requiring heavy technical setup.

Cons:

  • Steep learning curve, especially for beginners.
  • Pricing can be high for smaller teams.
  • Credit usage adds up quickly if workflows aren’t optimized.

Customer Reviews:

Pricing:

Clay Pricing Plans
Source: Clay

Clay operates on a credit-based system where each action consumes a credit. It's worth noting that Clay charges a markup on data accessed through its provider integrations, so costs can add up depending on usage.

  • Free: $0 (100 data credits/mo + 500 actions/mo)
  • Launch: $185/mo (3,000 data credits/mo + 15,000 actions/mo)
  • Growth: $495/mo (6,000 data credits/mo + 40,000 actions/mo)
  • Enterprise: Custom pricing (custom data credits + custom actions)
💡
Insider Tip: If you're using Findymail within Clay workflows, integrating via the Findymail API directly will get you the same verified data at a lower rate than purchasing through Clay. A small change that adds up to meaningful savings as your usage scales.

3. Freckle.io – The Best Clay Alternative for Non-Technical Teams

Freckle.io – The Best Clay Alternative for Non-Technical Teams
Source: Freckle.io

Overview:

Think of Freckle as the Clay alternative for non-technical users. Freckle is built for teams who want the same powerful AI-driven enrichment without the workflow-building headache.

The standout feature is its natural language processing engine. Instead of configuring complex logic, you simply describe the data you're looking for in plain English and Freckle's AI agents go find it. Want every contact's LinkedIn activity, recent funding news, and tech stack? Just ask. No rigid firmographic filters, no scoring models that fall apart the moment your ICP gets nuanced.

It's a refreshingly approachable take on AI enrichment and a strong option for teams that want Clay's ambition without Clay's learning curve.

Key Features:

  • Natural Language Processing: Describe your ideal customer profile in plain English and Freckle's AI scores every lead against it.
  • Waterfall Enrichment: Tap into 40+ data providers with pre-built waterfalls that fill the gaps automatically.
  • Automated Account Research: Stop burning hours on manual research. Freckle's AI agents handle tedious research at scale, without the busywork.
  • Native CRM Integrations: Freckle syncs directly with your CRM to create, update, and look up records in real time.

Ratings:

Freckle.io Ratings
Source: Freckle.io
  • G2: N/A
  • Capterra: N/A

Pros:

  • Describe your ICP in plain English and let the AI handle the heavy lifting, no technical setup required.
  • A genuinely accessible alternative to Clay for non-technical teams who want powerful enrichment without the complexity.

Cons:

  • Still early days, public reviews are scarce, so you're making a bet on promise as much as proof.
  • Customization depth and integration breadth don't quite match Clay's, so power users may eventually want more room to stretch.

Customer Reviews:

  • N/A

Pricing:

Freckle.io Pricing Plans
Source: Freckle.io

Freckle.io operates on a credit-based system with unlimited seats across all plans. Simply work out how many credits your team needs and you're good to go.

  • Free: $0/mo — Full platform access with 100 starter credits to kick the tires.
  • Build: $99/mo — Enhanced enrichment, scoring, and routing functionality.
  • Scale: $599/mo — Higher speeds, priority support, and an actual human to call when things go sideways.
  • Enterprise: Custom — For large-scale use cases that need a tailored plan.

4. UpLead

UpLead
Source: UpLead

Overview:

UpLead gives you fast access to real-time verified B2B contact data, backed by 50+ search filters and solid CRM integrations. It's built for teams that want to identify and reach their target audience quickly, without a steep learning curve.

The database covers 180 million+ B2B contacts across 200+ countries, searchable by job title, company size, industry, revenue, location, and technology usage — giving you enough depth to build highly targeted lists without jumping between tools.

Key Features:

  • Prospector Tool: 50+ search filters to find qualified leads in real time, including firmographics, technographics, and intent data.
  • Email Verification: Emails are verified at the point of export, keeping your contact lists accurate and your bounce rates low.
  • Data Enrichment: Real-time data synced directly to your CRM, so your records stay current without manual updates.
  • Technographics: Tracks 16,000+ technologies across CRM, e-commerce, marketing automation, analytics, and more.
  • Intent Data: Identifies prospects actively researching solutions like yours, so your outreach is better timed.

Ratings:

  • G2: 4.7/5 (824)
  • Capterra: 4.6/5 (76)

Pros:

  • Clean, intuitive UI that makes searching for contacts, companies, and relevant information straightforward.
  • Combining technographics, firmographics, and intent data makes it easy to build precise, well-targeted lists.

Cons:

  • Cancelling certain plans requires scheduling a call, which is an unnecessary friction point for a self-serve tool.
  • Core data enrichment features are reserved for higher-tier plans, limiting the value of entry-level access.
  • Some users have raised concerns about pricing transparency, so it's worth reviewing plan details carefully before committing.

Customer Reviews:

  • "exceptional, affordable tool for any sized business looking to increase revenue via direct selling" - Glenn L., verified G2 reviewer
  • "Intuitive UI with Reliable Leads, Needs Database Expansion" - Gerard A., verified G2 reviewer

Pricing:

UpLead
Source: UpLead

UpLead operates on a tiered pricing model, with more advanced CRM enrichment features locked behind higher plans.

  • Free Trial: $0/7 days – 5 credits.
  • Essentials: $99/mo – 170 credits/mo.
  • Plus: $199/mo – 400 credits/mo.
  • Professional: Custom – Request a demo for tailored seat counts and credit volumes.

5. Cognism

Cognism
Source: Cognism

Overview:

Cognism is built for teams where compliance isn't an afterthought. Designed to meet GDPR, CCPA, and SOC 2 standards, it delivers accurate B2B contact data and intent insights without the legal grey areas that come with less rigorous providers.

Its phone number coverage stands out in particular, thanks to Diamond Data®; a verification process that goes beyond automated checks to ensure the numbers you pull actually reach real people.

Key Features:

  • Diamond Data®: Cognism's team physically verifies phone numbers to confirm they're correct and currently in use. When you pull a Diamond Data® contact, you can be confident the number connects.
  • Sales Companion: A personalised sales assistant that helps reps tailor outreach and connect with decision-makers in the accounts that matter most.
  • Data Enrichment: Cognism offers three enrichment options (Instant, Scheduled, and On-Demand CSV) to keep your CRM accurate and up to date.
  • Intent Data & Buying Signals: Signal Data layers buying context onto Diamond contacts, helping you reach the right decision-makers at the right moment.
  • AI Data Fusion Engine: Cognism's proprietary engine pulls from news reports, press releases, earnings reports, public registries, and validated third-party vendors to keep data fresh and comprehensive.

Ratings:

Cognism Ratings
Source: Cognism
  • G2: 4.5/5 (1,302)
  • Capterra: 4.7/5 (254)

Pros:

  • Strong European coverage, particularly valuable for teams operating in GDPR-regulated markets.
  • Intent signals that help with timing, not just targeting.
  • A complete sales engagement suite with powerful automation built in.
  • GDPR-first approach means fewer compliance concerns out of the box.

Cons:

  • Enterprise-grade features come with enterprise-level pricing — not the most accessible option for smaller teams.
  • The breadth of features means a more involved setup and a steeper initial learning curve.
  • Credit limits apply, though they're more generous than most comparable tools.

Customer Reviews:

Pricing:

Cognism
Source: Cognism

Cognism offers two plans, though pricing isn't publicly listed. You'll need to connect with their team for a full breakdown.

  • Grow: Request a quote — prospecting essentials to identify and engage the right accounts.
  • Elevate: Request a quote — everything in Grow, plus Market & Buying Signals and available add-ons.

6. Apollo.io

Apollo.io
Source: Apollo.io

Overview:

Apollo is best known for its vast B2B contact database, but its data health capabilities often fly under the radar. Beyond prospecting, Apollo offers a suite of enrichment tools designed to keep your CRM records fresh and accurate on an ongoing basis.

Apollo continuously cleans and enriches records with demographic, firmographic, real-time signal, and verified contact data, giving your team the confidence to reach out without second-guessing the accuracy behind it.

Like Clay, Apollo positions itself as a one-stop shop for revenue teams, combining data enrichment with the ability to act on it directly. Data quality can be inconsistent at times according to some users, but for teams that want a single platform to clean their data and run outreach from it, Apollo makes a compelling case.

Key Features:

  • Expansive B2B Database: 210M+ contacts and 65+ data points, making it a solid foundation for enrichment at scale.
  • AI-Powered Lead Scoring: Score prospects based on fit, behavior, engagement history, and conversion likelihood — with the option to define your own scoring rules.
  • Job Change & Missing Email Enrichment: Automatically updates records when contacts change roles or companies, keeping your data fresh without manual intervention.
  • Waterfall Enrichment: Pulls from Apollo's database and a cascading lineup of third-party sources to surface more complete, actionable contact data.
  • Enrichment & CRM Sync: Flexible enrichment workflows with native integrations across Salesforce, HubSpot, Zoho, and Pipedrive for real-time sync of contacts, tasks, and activity.

Ratings:

Apollo.io Ratings
Source: Apollo.io
  • G2: 4.7/5 (9,431)
  • Capterra: 4.5/5 (385)

Pros:

  • Can be integrated with Findymail to add an extra layer of email verification and protection.
  • Users consistently praise the size and depth of the contact database for prospecting at scale.
  • Clean interface and intuitive navigation make building and managing outreach campaigns relatively straightforward.

Cons:

  • Initial setup and onboarding can feel complex for new users.
  • The free plan is very limited, making it hard to use meaningfully without upgrading.

Customer Reviews:

Pricing:

Apollo.io Pricing Plans
Source: Apollo.io

Apollo offers a range of plans to suit different team sizes, solutions, and use cases.

  • Free: $0/user/mo – 75 credits.
  • Basic: $59/user/mo – 2,500 credits.
  • Professional: $99/user/mo – 4,000 credits.
  • Organisation: $59/user/mo – 6,000 credits.

7. ZoomInfo

ZoomInfo
Source: ZoomInfo

Overview:

ZoomInfo is one of the most established names in B2B contact data, and for good reason. Its database is vast, its real-time updates keep data fresh, and its advanced search filters make it easier to zero in on the right prospects. For enterprise sales and marketing teams operating at scale, it's a serious contender.

CRM integration is seamless, and the API makes it straightforward to automatically pull, qualify, and score leads without manual intervention. The depth of coverage and functionality is hard to match, though that comes with trade-offs worth considering.

Key Features:

  • Enterprise Contact Data: Extensive global coverage with real-time updates to keep your records accurate.
  • Buyer Intent & Technographics: Advanced targeting signals to identify prospects who are in-market and ready to engage.
  • Advanced Segmentation: Precise filtering capabilities for building highly targeted campaign audiences.
  • CRM Sync & Automation: Deep integrations with enterprise sales stacks for streamlined workflows and automated data management.

Ratings:

ZoomInfo Ratings
Source: ZoomInfo
  • G2: 4.5/5 (9,018)
  • Capterra: 4.1/5 (317)

Pros:

  • One of the largest B2B databases available, with comprehensive global coverage.
  • Particularly strong for sourcing leads in the U.S. market.
  • Deep integrations with enterprise sales and marketing stacks.
  • The Chrome extension is versatile and well-suited for LinkedIn prospecting and general outbound research.

Cons:

  • High pricing with significant minimum commitments, likely overkill for smaller teams or those with modest prospecting needs.
  • Coverage in EMEA markets is notably weaker than several competitors, which is worth factoring in if that's a core territory.
  • The terms and conditions are more restrictive than most: upon termination, all data sourced from ZoomInfo must be deleted from your CRM — a requirement that most other providers don't impose.
  • The updated platform UI has received mixed feedback, with some users finding it less intuitive than the previous version.

Customer Reviews:

  • "User-Friendly Customization with Powerful Tailoring Options" – Hunter H., verified G2 reviewer
  • "A Well-Organized Way to Build Targeted Prospect Lists and Maintain a Strong Pipeline" – Mason V., verified G2 reviewer

Pricing:

ZoomInfo Pricing Plans
Source: ZoomInfo

ZoomInfo's pricing is customized by use case and team size. You'll need to contact their sales team for a full breakdown.

  • Sales: Contact Sales
  • Marketing: Contact Sales
  • Talent: Contact Sales

8. Lusha

Lusha
Source: Lusha

Overview:

Lusha is a well-known B2B contact data tool, particularly recognized for its LinkedIn Chrome extension that surfaces business emails and phone numbers directly from profiles. It's a popular choice among small teams for its simplicity and ease of use.

That said, Lusha has its limitations. Credit restrictions, pricing transparency concerns, and GDPR compliance questions (particularly for European users) are recurring themes in user feedback and worth factoring into your decision.

Key Features:

  • Buyer Intelligence: Data and buyer insights designed to help you reach the right prospects at the right time.
  • LinkedIn Chrome Extension: Instant contact discovery directly from LinkedIn profiles.
  • Email & Phone Discovery: Business contact data sourced across multiple providers.
  • CRM Integrations: Native integrations with Salesforce, HubSpot, and Pipedrive.
  • API Access: Custom integration options for teams with more specific workflow needs.
  • Global B2B Database: Broad contact database access across multiple markets.

Ratings:

Lusha Ratings
Source: Lusha
  • G2: 4.3/5 (1,613)
  • Capterra: 4.0/5 (396)

Pros:

  • Reliable for pulling direct phone numbers from LinkedIn profiles quickly and with reasonable accuracy.
  • The email confidence scoring system (which grades how likely an email is to be delivered) makes it easier to prioritize outreach and focus on the most viable contacts.
  • Clean, straightforward interface that integrates smoothly with LinkedIn and CRM workflows.

Cons:

  • Credit-based pricing can become a friction point at scale. Verifying contacts consumes credits, and costs add up quickly as team size grows.
  • Data accuracy outside North America is inconsistent. Users report needing to supplement Lusha with additional tools, particularly for smaller companies or niche roles in non-U.S. markets.
  • GDPR compliance is questionable in certain European regions, which may be a dealbreaker for teams operating in regulated markets.
  • The onboarding experience leaves something to be desired — the learning curve is steeper than the interface suggests, and the available tutorials don't fully bridge the gap.

Customer Reviews:

Pricing:

Lusha Pricing Plans
Source: Lusha

Lusha's plans are flexible, but actual costs vary depending on usage and feature requirements, worth reviewing carefully before committing.

  • Free: $0 USD/mo – 40 credits/mo
  • Starter: $49.90 USD/mo – 400 credits/mo
  • Pro: $294.90 USD/mo – 1,000credits/mo
  • Premium: $399.90 USD/mo – 3,400 credits/mo
  • Scale: Contact sales – custom credits/year

Final Thoughts

Picking the right CRM enrichment tool comes down to what your team actually needs. Clay and Apollo suit teams that want to prospect, enrich, and run outreach from a single platform. Cognism is the go-to for compliance-first teams, particularly in European markets. UpLead and Lusha are solid options for smaller teams that need straightforward contact data without the complexity. And for teams that want Clay-level enrichment without the technical overhead, Freckle is worth a look.

However, if clean, verified CRM data is the foundation you’re building on…

Findymail CRM Datacare is the most focused solution in this list. Backed by a sub-5% bounce rate guarantee, native CRM integration, and enterprise-grade security, it keeps your CRM accurate and current so your team can focus on building relationships and closing deals.

Every demo also includes the option to run a free CRM health check, giving you a clear picture of any data issues, areas for improvement, and exactly how Findymail CRM Datacare can help address them.

FAQs About CRM Data Enrichment Tools

What is the best CRM data enrichment tool?

The best tool depends on your team's size, technical capabilities, and priorities. For verified contact data and automated CRM hygiene, Findymail CRM Datacare is a top choice. For all-in-one prospecting and outreach, Clay and Apollo are worth considering. For compliance-first teams, Cognism leads the pack.

How accurate is CRM enrichment data?

Accuracy varies significantly between providers. Most tools advertise high match rates, but verification standards differ. Findymail consistently delivers 98%+ verification rates with a bounce rate under 5%, making it one of the more reliable options available.

Is CRM data enrichment GDPR compliant?

Not all providers are. Compliance depends on how a tool sources, stores, and processes personal data. Cognism is purpose-built with GDPR compliance at its core, while some other providers have faced criticism in this area, particularly for European market coverage. Always review a provider's data practices and terms before committing, especially if you operate in regulated markets.

How often should CRM data be refreshed?

As a general rule, CRM data should be reviewed and refreshed at least every 90 days. Contact details, job titles, and company information change frequently — studies suggest that B2B data decays at a rate of around 30% per year. Tools like Findymail CRM Datacare solve this by running enrichment continuously in the background, so your data stays current without requiring scheduled manual reviews.

What's the difference between enrichment and sales intelligence?

Data enrichment is the process of filling in and updating existing records with accurate, current information — think verified emails, phone numbers, job titles, and firmographic data. Sales intelligence goes a step further, layering in behavioral signals, intent data, and buying triggers to help teams identify not just who to contact, but when and why. Many modern tools combine both, but they serve distinct purposes within a sales workflow.

Valentin

Valentin

Valentin Wallyn is the founder and CEO of Findymail, a SaaS platform he launched to help B2B teams discover accurate email and contact data and automate data enrichment at scale. With an IT background, Valentin combines a technical mindset with hands-on experience in outreach and growth. His work centers on improving data quality and prospecting efficiency, drawing on years of entrepreneurial experience and a deep understanding of what makes outreach campaigns succeed.