9 Apollo Alternatives & Competitors [Ranked & Reviewed]

Evaluating Apollo alternatives? This guide ranks the top sales intelligence and GTM platforms based on data verification depth, direct-dial accuracy, and buyer intelligence capabilities to help you find the right fit for your team.

Apollo built its reputation as an affordable prospecting solution for SMB sales teams, and it earns real praise for its free tier, transparent seat-based pricing, and the way it bundles data and outreach in one interface. But teams relying on high-volume outbound quickly encounter friction: G2 reviews cite bounce rates between 15-25% and phone numbers that route to switchboard lines instead of the decision-maker's cell, credits that expire before the billing cycle ends (8 credits per phone lookup versus 1 per email), and coverage gaps in EMEA compared to dedicated alternatives. When those gaps start hurting pipeline, it is time to look at what else is available.

This guide ranks nine Apollo alternatives and competitors based on data quality, platform depth, pricing transparency, and fit signals that matter most to quota-carrying reps and the RevOps teams supporting them. G2: Apollo rates 4.8 / 5 based on 7,142 reviews (G2, 2025). See how Apollo stacks up in detail: Apollo vs ZoomInfo, dive into Apollo pricing if cost structure is your primary evaluation criterion, or read our full Apollo features breakdown for a deeper look at the platform itself.

How We Evaluated These Apollo Alternatives

Every tool in this guide is scored against the same six criteria, the axes that consistently separate a tool teams outgrow from a tool teams standardize on:

• Data accuracy and verification depth. Is contact data confirmed through first-party human verification, or aggregated algorithmically from third-party sources? Direct-dial coverage versus switchboard numbers is the practical test.

• Platform breadth beyond outbound. Does the tool only deliver contacts and sequencing, or does it reason over CRM, conversation, and behavioral data to explain why an account is worth calling this week?

• Pricing transparency and predictability. Is pricing public and easy to model at your team's actual volume, or does it require a sales conversation to size?

• Regional data coverage. How deep is the database outside North America, particularly EMEA, where Apollo's coverage is thinnest?

• Enterprise governance and compliance. SSO, SOC 2 Type II, ISO 27001/27701, and GDPR/CCPA documentation, not just a checkbox on the pricing page.

• Integration and workflow depth. Native CRM sync, sales engagement connectors, and programmatic access via API or MCP for teams building custom workflows.

The rankings below apply these criteria in order of how often they come up as the reason a team starts looking for an Apollo alternative or competitor in the first place.

1. ZoomInfo

ZoomInfo is the top Apollo competitor for teams that have outgrown a contact-and-sequencing stack, because it replaces Apollo's single-surface model with three integrated layers: the most comprehensive B2B data foundation in the category, an intelligence layer that reasons over that data in real time, and universal access that puts ZoomInfo's data inside any workflow your team already uses.

The data foundation covers 500M contacts, 100M companies, 135M+ verified phone numbers including 120M direct dials, and 200M+ verified business emails. More than 300 human researchers work alongside machine learning to verify and refresh that data continuously, which is why ZoomInfo consistently outperforms in direct-dial accuracy benchmarks where Apollo's aggregation-based model shows higher bounce rates.

The intelligence layer is the GTM Context Graph, which processes 1.5B+ data points every day. It fuses ZoomInfo's B2B contact and company data with your CRM records, conversation intelligence, and behavioral signals into a unified reasoning layer. The result is not just "here is a contact" but "here is the account that matches your ICP, here are the three buying signals that fired in the last 30 days, and here is the rep action that will move them." That is the gap Apollo does not close, even on its Organization plan.

Universal access means ZoomInfo's data reaches your team in whatever tool they use. GTM Workspace delivers a seller-facing surface with AI agents. GTM Studio gives marketers and RevOps teams audience building and orchestration. APIs & MCP connects ZoomInfo data directly into any tool, CRM, or AI agent your engineering team builds.

"We're qualifying leads faster than ever. We have all the information we need up front, including fields like job titles and company size which are not included on our webforms."

Rick Collins, Senior Marketing Systems Analyst, ConnectWise

Job titles added to94%of the 455,000 contacts ZoomInfo matched across ConnectWise's CRM

Read case study

Seismic, the sales enablement platform, reported 54% productivity gains and 11.5 hours saved per rep per week after deploying ZoomInfo's GTM Workspace capabilities. That is the kind of rep-level outcome that moves pipeline metrics, not just data hygiene scores.

G2: 4.4 / 5 based on 8,700+ reviews

Best for: Mid-market and enterprise sales, marketing, and RevOps teams that need verified data at scale, AI-powered buyer intelligence, and a platform that grows with the organization

Key features:

• 500M contacts, 100M companies, 135M+ verified phones, 200M+ verified emails, 300+ human researchers

• GTM Context Graph: 1.5B+ data points processed daily, fusing CRM, conversation, and behavioral signals into a single reasoning layer

• GTM Workspace with AI agents for prospecting, meeting prep, and outreach

• GTM Studio for marketers, RevOps, and GTM engineers

• APIs and MCP server for programmatic access and AI agent workflows

• ISO 27001, ISO 27701, SOC 2 Type II, TRUSTe GDPR/CCPA compliance

Pricing: Free to start with consumption credits based on usage.

Pros:

• Largest verified B2B data foundation in the category (500M contacts, 135M+ verified phones)

• GTM Context Graph provides "why now" reasoning beyond raw contact lookup

• Universal access: APIs & MCP, GTM Workspace, GTM Studio in one platform

• 35,000+ customers including 1,921 spending $100K+ per year

• G2 Leader in Sales Intelligence

Cons:

• Higher investment than Apollo for small teams or individual reps starting from scratch

• Consumption-credit pricing model requires scoping to match team volume

• Platform breadth may exceed what pure outbound teams need in the short term

2. Amplemarket

Amplemarket is a direct Apollo competitor because it targets the exact same buyer, a stack-consolidation pitch for outbound teams, but layers an AI agent (Duo) on top of the data and sequencing instead of leaving personalization to the rep. Amplemarket's own customer wall names teams that migrated off Apollo, Outreach, and Salesloft entirely.

Duo Copilot tracks more than 100 contact-level signals (job changes, G2 review activity, Slack community posts, competitor mentions) and drafts multichannel sequences per signal for a rep to approve or edit. Searcher, the natural-language lead-generation layer, is backed by 200M+ verified contacts with a 70M+ weekly refresh and a reported sub-3% bounce rate. Where Amplemarket pulls further ahead of Apollo is deliverability: Domain Health Center, an AI warmup network, inbox placement testing, and mailbox recommendation are bundled natively, a category Apollo does not cover at all.

G2: 5-star reviews reported; named a Gartner Cool Vendor in Generative AI for Sales.

Best for: Sales teams that want an AI agent handling contact-level signal detection and multichannel personalization, plus deliverability tooling Apollo does not offer natively.

Key features:

• 200M+ verified contacts with a 70M+ weekly refresh, sub-3% average bounce rate, 96.5% phone accuracy

• Duo Copilot: AI agent tracking 100+ contact-level signal types and drafting multichannel outreach for rep approval

• Built-in deliverability suite: Domain Health Center, warmup Booster, inbox placement tests, mailbox recommendation

• Multichannel sequences across email, phone, social DMs, WhatsApp, and iMessage with conditional logic

• Bi-directional Salesforce and HubSpot sync

Pricing: Startup $300/mo/user (2-user minimum, billed annually); Growth and Elite tiers are custom, gated to a sales conversation.

Pros:

• Contact-level buying signals (job changes, G2 reviews, Slack communities) go deeper than Apollo's firmographic filters

• Deliverability tooling (domain health, warmup, inbox placement) bundled natively, a category Apollo does not cover

• Weekly database refresh with a low reported bounce rate

Cons:

• No free tier; the Startup plan requires a 2-user minimum at $300/mo/user, a higher floor than Apollo's free entry point

• Growth and Elite pricing is gated to a sales conversation, less transparent than Apollo's public seat pricing

• No GTM Context Graph-style reasoning layer or conversation intelligence product

3. Cognism

Cognism is a strong Apollo competitor for one specific reason: it has an on-demand phone verification service that confirms mobile numbers through human callbacks rather than algorithmic inference, which directly addresses the switchboard-number problem that pushes most EMEA-focused teams away from Apollo.

Combined with DNC registry screening across 15 countries, covering UK TPS/CTPS, US, Canada, Australia, and 10 EU registers, Cognism gives EU-focused revenue teams a compliance posture that Apollo, with its GDPR Processor/Controller certification alone, does not match. The platform includes AI-powered natural-language search (Cognism AI), a browser extension that surfaces data inside LinkedIn, Sales Navigator, Salesforce, HubSpot, and Outreach, and CRM integrations with Salesforce, HubSpot, Dynamics, and Pipedrive included as standard.

Cognism's compare page cites switching customers reporting a 22% vs 14% call connect rate advantage, but North American data coverage lags ZoomInfo meaningfully. If the majority of your ICP is US-based, Cognism's EMEA data does not offset ZoomInfo's data scale. See our full Apollo vs. Cognism breakdown for a feature-by-feature comparison.

G2: 4.6 / 5 based on 2,415 reviews

Best for: Revenue teams with significant EU/UK coverage requirements, SDR leaders who need phone-verified mobile numbers, and ops teams managing GDPR compliance

Key features:

• Diamond Data: human-verified mobile numbers for EU/UK contacts, confirmed by callback rather than algorithmic inference

• DNC/TPS screening across 15 countries as standard

• Cognism AI natural-language search plus a browser extension for LinkedIn, Sales Navigator, Salesforce, HubSpot, and Outreach

• CRM integrations included in pricing: Salesforce, HubSpot, Dynamics, Pipedrive

• Bombora intent data partnership for buying-signal coverage

Pricing: Quote-based (Standard and Pro tiers; CRM Enrichment and DaaS add-ons available).

Pros:

• Diamond Data program: human-verified mobile numbers for EU/UK contacts

• DNC/TPS screening across 15 countries as standard

• Integrations included in pricing (Salesforce, HubSpot, Dynamics, Pipedrive)

• Bombora intent data partnership extends buying signal coverage

Cons:

• North American data coverage gaps versus ZoomInfo's global scale

• No native sequencing or dialer bundled in the platform

• Quote-based pricing with no public dollar amounts

• No free tier or self-serve entry point

4. Lusha

Lusha competes with Apollo on speed rather than platform breadth: for individual reps and SMB teams that do most of their prospecting directly on LinkedIn, its Chrome extension is one of the fastest contact reveal tools in the category, and it ships an MCP server, one of only a handful of vendors in the B2B data category with a documented Model Context Protocol integration.

Pricing is fully public with five tiers: Free (40 credits/month), Starter ($37.45/month), Pro ($52.45/month), Premium ($299.95/month), and Scale (custom). That transparency is unusual for the category and reduces the evaluation friction Apollo's public pricing is designed to win on, but Lusha does it at a lower absolute price point for individual and small-team buyers.

G2: 4.3 / 5 based on 1,492 reviews

Best for: Individual reps, SDR teams, and small GTM teams that prospect heavily on LinkedIn and need transparent, low-friction pricing.

Key features:

• Chrome extension for fast LinkedIn contact reveal

• Lusha MCP server for AI-agent workflows

• Buying signals layer alongside contact data

• Free Manager Seat included on every tier

• Five fully public pricing tiers with no "contact sales" gating until Scale

Pricing: Free (40 credits/month); paid tiers from $37.45/month.

Pros:

• Fast, simple Chrome extension for LinkedIn contact reveal

• Fully public five-tier pricing with no "contact sales" gating until Scale

• Lusha MCP server for teams building AI-agent workflows

• Free Manager Seat included on every tier

Cons:

• Smaller database than ZoomInfo's 500M contacts

• Lower G2 review volume (1,492 vs ZoomInfo's 8,700+) limits peer validation

• Intent signal depth lighter than dedicated GTM intelligence platforms

• Enterprise workflow depth does not match ZoomInfo's GTM Workspace

5. LinkedIn Sales Navigator

Sales Navigator is less a straight Apollo replacement and more a complementary tool for teams whose primary motion is relationship-led selling: warm introductions, champion tracking through job changes, and InMail outreach to net-new contacts, where its access to the LinkedIn graph provides context and reach no contact database can replicate.

Sales Navigator's Advanced tier adds TeamLink, which surfaces warm introduction paths across your entire team's LinkedIn connections. Advanced Plus adds CRM data validation directly against LinkedIn, uniquely valuable for teams trying to keep Salesforce records current without manual verification. The honest limitation is that Sales Navigator does not deliver verified emails or direct-dial phone numbers. Most ZoomInfo enterprise customers run both platforms simultaneously: Sales Navigator for warm path identification and relationship context, ZoomInfo for verified contact delivery at scale.

G2: 4.3 / 5 based on 1,900+ reviews

Best for: Enterprise AEs, account managers, and teams where relationship intelligence and warm introductions are the primary deal-advancement motion

Key features:

• Access to the LinkedIn graph: largest verified people-and-company network globally

• TeamLink for warm introduction paths across the entire team's network

• Real-time job change alerts for champion tracking and re-engagement

• CRM data validation against LinkedIn (Advanced Plus)

Pricing: Core tier approximately $99/seat/month (exact pricing via LinkedIn sales team).

Pros:

• Access to the LinkedIn graph: largest verified people-and-company network globally

• TeamLink surfaces warm introduction paths across the entire team's network

• Real-time job change alerts for champion tracking and re-engagement

• CRM data validation against LinkedIn (Advanced Plus)

Cons:

• No verified email or direct-dial phone delivery: contact information remains behind LinkedIn's wall

• Per-seat pricing is high relative to the data delivery constraints

• Intent signals limited to LinkedIn activity only (no cross-web behavioral data)

• Best used alongside a contact-data platform rather than as a standalone Apollo replacement

6. Seamless.AI

Seamless.AI is a viable Apollo alternative because it competes on data freshness rather than data size: it positions itself as a real-time AI search engine that queries live sources at search time instead of serving cached records, and it offers a free tier that makes it one of Apollo's closest budget-first alternatives.

The platform's Data Engine covers a prospecting workflow (Prospector), buyer intent signals, job change tracking, CRM enrichment, and a pitch intelligence layer. The Engagement Hub and AI Agents add outreach automation and autonomous prospecting on top of the data foundation. The honest signal from user reviews: Seamless earns high G2 volume (4,880+ reviews) but the UX and data accuracy reviews are more mixed than the star rating suggests.

G2: 4.4 / 5 based on 4,880 reviews

Best for: Teams prioritizing real-time contact data over static database access, and individual reps who need a free entry point with room to scale.

Key features:

• Real-time search engine rather than periodic database refresh

• Buyer intent data integrated into the prospecting workflow

• AI Agents for automated prospecting workflows

• Job change tracking included

Pricing: Free tier available; Pro and Enterprise pricing quote-based.

Pros:

• Real-time search engine rather than periodic database refresh

• Buyer intent data integrated into the prospecting workflow

• Free tier with meaningful access for individual reps

• AI Agents for automated prospecting workflows

Cons:

• Pro and Enterprise pricing not public: cost comparison requires a vendor conversation

• Data accuracy reviews more mixed than headline G2 rating indicates

• UX complexity complaints appear consistently in G2 reviews

• Smaller verified dataset at enterprise scale versus ZoomInfo

7. LeadIQ

LeadIQ earns its spot as an Apollo alternative on two specific workflows rather than platform breadth: champion tracking as contacts move between companies, and one-click capture of verified contact data from LinkedIn directly into Salesforce or HubSpot.

The champion tracking use case is where LeadIQ earns consistent G2 praise from enterprise AEs: when a previous closed-won contact moves to a new account that fits your ICP, LeadIQ surfaces the job change alert with enough context to trigger timely outreach before competitors know the move happened. The AI Account Prospecting module extends that workflow to net-new account research, pulling data from LinkedIn, 10-K filings, and web sources. Sigma's sales operations team reported a 5x increase in prospecting outreach using LeadIQ's AI research capabilities.

G2: 4.2 / 5 based on 1,050 reviews

Best for: SDRs, AEs, and enterprise account managers who need champion tracking and Salesforce-native one-click prospecting.

Key features:

• Champion tracking: real-time job change alerts for re-engagement

• Salesforce-native one-click capture with real-time data verification

• AI account research across LinkedIn, 10-K, and web data

• Team-wide claim and lock to prevent duplicate outreach

Pricing: Credit-based tiers from 2,400 credits/year; Enterprise tier with custom pricing.

Pros:

• Champion tracking: real-time job change alerts for re-engagement at the right moment

• Salesforce-native one-click capture with real-time data verification on delivery

• AI account research across LinkedIn, 10-K, and web data

• Credit-based model with public pricing slider

Cons:

• Smaller contact database than ZoomInfo (no 500M-contact scale)

• Does not compete on conversation intelligence, ABM, or marketing-side products

• Lower G2 review volume limits social proof relative to Apollo alternatives with larger install bases

• Enterprise features (governance, advanced integrations) gated behind custom pricing

8. RocketReach

RocketReach stands out as an Apollo alternative for one clear reason: it pairs a 700M+ contact database with among the most transparent self-serve pricing in the B2B data category, with three tiers fully listed and no vendor conversation required to size the investment.

The practical differentiator beyond database scale is Autopilot, a feature that refreshes contact lists automatically on configurable schedules, keeping pipeline current without manual re-searches. Ninety-five percent of the S&P 500 are reported RocketReach customers, providing credible enterprise validation even though the product is primarily designed for self-serve use. The honest gap: RocketReach does not offer a GTM intelligence layer or the platform breadth of ZoomInfo's workspace and studio surfaces.

G2: 4.5 / 5 based on 760+ reviews

Best for: Individual reps, recruiters, and small teams that need a large, self-serve contact database at an accessible price point.

Key features:

• 700M+ contact database with unusually transparent public pricing

• Autopilot for automated contact list refresh

• Intent data available as an add-on (Ultimate tier)

• Healthcare NPI data for life sciences teams

Pricing: Essentials at $25/month (email only) or $299/year; Pro at $62/month or $749/year.

Pros:

• 700M+ contact database with unusually transparent public pricing

• Autopilot for automated contact list refresh

• Intent data available as an add-on (Ultimate tier and separate bundle)

• 95% of S&P 500 as reported customers

Cons:

• No GTM Context Graph or AI intelligence layer for "why now" account reasoning

• No native sales engagement, sequencing, or dialer

• Autopilot count bounded by tier (no unlimited plan at self-serve price points)

• G2 review count lower than larger-install alternatives

9. Hunter.io: Best for Domain-Based Email Discovery

Hunter.io is an Apollo alternative for a narrow but real use case: finding professional email addresses when you know the company domain but not the individual's email format. It is not a full contact database the way Apollo is, it is a fast, clean email finder and verifier for marketers, content teams, and solopreneurs who need contact discovery without enterprise prospecting overhead.

The distinguishing feature is source transparency: Hunter shows the source URL for each discovered email, which builds immediate trust in the result. Email Finder and Email Verifier are bundled in the platform, with a Campaign module for cold email sequences. The free tier provides 25 searches per month with no credit card required, the most accessible evaluation entry point of any tool in this list. The honest constraint: Hunter is email-only, with no direct-dial phone numbers, intent signals, or buyer intelligence. See the full Apollo vs. Hunter.io comparison for where each tool wins.

G2: 4.4 / 5 based on 500 reviews

Best for: Marketers, content teams, and solopreneurs who need fast, attributed email discovery without enterprise prospecting overhead

Key features:

• Source attribution per email: shows the URL where the address was found

• Email Finder and Verifier bundled in the same platform

• Free tier with no credit card required (25 searches/month)

• Domain search covers most professional email formats reliably

Pricing: Free (25 searches/month, no credit card); paid plans from $49/month.

Pros:

• Source attribution per email: shows the URL where the address was found

• Email Finder and Verifier bundled in the same platform

• Free tier with no credit card required (25 searches/month)

• Clean, fast interface with low learning curve

Cons:

• Email only: no phone numbers, no direct dials

• No intent data, buyer signals, or GTM intelligence layer

• Not suitable as a standalone Apollo replacement for high-volume outbound teams

• Database scale does not approach ZoomInfo or Apollo contact counts

Apollo Alternatives at a Glance

Ready to see how ZoomInfo stacks up against Apollo? Request a demo to explore the data quality difference firsthand.

How to Choose the Right Apollo Alternative

The right Apollo replacement depends on which of the six evaluation criteria above is the actual trigger behind your search. The most common triggers, data accuracy, credit model friction, and EMEA coverage gaps, point to different solutions.

If data accuracy is the primary driver: Look for platforms with first-party verification programs (not just algorithmic scraping) and phone verification that distinguishes direct dials from switchboard numbers. ZoomInfo's 300+ human researchers and 120M direct dials are the benchmark against which Apollo's 97% email accuracy claim looks less precise when bounce rates surface in practice.

If AI-native outbound and deliverability are the driver: Amplemarket's Duo Copilot and bundled deliverability suite (warmup, inbox placement, mailbox recommendation) address gaps Apollo's stack does not cover natively.

If budget is the primary driver: Start with the free tiers: Lusha (40 credits/month), Seamless.AI (free entry), or Hunter.io (25 searches/month, email only). For teams with volume requirements, RocketReach's $25/month Essentials tier is among the most accessible paid options in the category.

If platform breadth matters: Apollo's all-in-one story is legitimate for SMB teams that want data, sequencing, and dialer in one license. If you are outgrowing Apollo's stack, ZoomInfo's three-pillar platform (data plus GTM Context Graph plus universal access via APIs & MCP, GTM Workspace, and GTM Studio) scales with mid-market and enterprise GTM complexity without swapping platforms again.

If CRM integration depth is the driver: LinkedIn Sales Navigator (Advanced Plus) validates CRM data directly against the LinkedIn graph, uniquely useful for teams trying to maintain Salesforce accuracy. LeadIQ's one-click Salesforce capture with real-time verification is the best LinkedIn-to-CRM workflow in the group for SDR-heavy teams.

If AI and intent signals matter: Buyer intelligence moves the needle differently depending on where the signals come from. LinkedIn Sales Navigator shows LinkedIn activity. Seamless.AI and Amplemarket both offer intent and contact-level signals as part of their data engines. ZoomInfo's GTM Context Graph fuses intent, CRM, conversation, and behavioral data into a unified reasoning layer, the most comprehensive interpretation available. For teams where the question is not just "who is this buyer" but "why should we call them this week," the GTM Context Graph is the structural differentiator.

Frequently Asked Questions

Why are people looking for Apollo alternatives?

The most common reasons teams evaluate Apollo alternatives and competitors fall into three categories. Data accuracy: G2 reviews consistently cite bounce rates between 15-25% and phone numbers that connect to switchboard lines rather than direct dials, which wastes rep time and creates CRM noise. Credit model complexity: phones cost 8 credits per lookup versus 1 credit per email, credits expire each billing cycle regardless of usage, and the advanced search filters most reps actually need require the $119/seat Organization plan. International coverage: Apollo's GDPR compliance is real, but EMEA contact data quality lags Cognism significantly for teams selling into EU and UK markets.

What is the best Apollo alternative for enterprise sales teams?

ZoomInfo is the strongest Apollo alternative for enterprise and mid-market GTM teams. The data scale difference is significant: 500M contacts and 135M+ verified phones versus Apollo's 230M contacts, with first-party verification from 300+ human researchers rather than aggregation-only models. More importantly, ZoomInfo's GTM Context Graph provides an AI intelligence layer that Apollo does not match, fusing CRM data, conversation signals, intent signals, and behavioral data into real-time "why this account now" reasoning.

Is ZoomInfo better than Apollo?

It depends on team size, budget, and use case. ZoomInfo is the stronger choice for teams that need larger verified data scale, AI-powered buyer intelligence and account prioritization, enterprise compliance (ISO 27001/27701, SOC 2 Type II), and platform breadth across sales, marketing, and RevOps. Apollo is the stronger choice for individual reps or small SDR teams with limited budgets who need an all-in-one stack at a lower entry price, and for use cases where a simple prospecting-plus-sequencing workflow is sufficient. The data quality gap grows more consequential as team size and outbound volume increase.

What is the best free Apollo alternative?

Several platforms offer free tiers worth evaluating. Lusha provides 40 credits per month with access to the Chrome extension and workspace. Seamless.AI has a free entry tier with credit-based access to its real-time search engine. Hunter.io provides 25 domain searches per month with no credit card required, though it is email-only. For teams with enterprise data requirements, ZoomInfo is free to start with consumption credits based on usage.

Which Apollo alternative has the best EMEA data coverage?

ZoomInfo or Cognism are the clear leader for EU and UK-focused revenue teams. ZoomInfo offers the largest global database of any tools like Apollo, as well as 20.5M+ companies and 66M+ contacts in Europe.

If you're weighing Apollo against other tools in the category, you might also like 6sense vs. Apollo, Amplemarket vs. Apollo, and Apollo vs. Clarify. Evaluating a different vendor's ecosystem instead? See our roundups of Clay alternatives, Kaspr alternatives, and Lusha alternatives.