10 Best Seamless AI Alternatives & Competitors [Oct 2025]

Seamless AI is an AI sales prospecting tool that helps you research and validate contacts and businesses in seconds.

The platform promises to help you build your best lead list and craft personalized sales emails with its AI scoring capabilities that will indicate the reliability of information.

However, some users of the platform have not been happy with its data quality, pricing, and international coverage.

In this buyer article, I’ll go over the 10 best Seamless AI alternatives on the market, going over their features, use cases, pros & cons, and pricing structures.

TL;DR

The main reasons why some sales teams have been looking to switch from Seamless AI are its occasional outdated or duplicate records, custom pricing that can be steep, and limited international data coverage.
Warmly offers the best alternative to Seamless AI with its signal-based revenue orchestration, real-time visitor identification, and AI-powered outbound automation capabilities.
Tools like Lusha and Apollo are ideal for SDRs and SMB sales teams that need quick, affordable contact enrichment and integrated outreach tools.
On the other hand, platforms like ZoomInfo and Cognism can help you access enterprise-grade data coverage and intent insights, making them better suited for large and/or international sales teams.

Why have some sales teams been looking to make the switch from Seamless AI?

Initially, I was impressed with Seamless AI’s database of contacts for different industries and how ‘’seamless’’ it was to use it (no pun intended).

I could really find the contact info of the leads I ran it past to test it, with both firmographics and intent data.

However, as I started to use the platform more extensively, some issues started to show, and I later found that other users of the platform share the same concerns: ⤵️

#1: Occasional outdated titles, duplicate records, or contacts that require verification

The #1 issue of the tool that I saw everyone talk about and experienced firsthard has been the tool’s occasional outdated contact information.

➡️ And, to be fair to Seamless AI, it’s not easy maintaining a database with over a billion contacts.

As a result, users of the platform mention that they have to perform manual data validation before feeding the results into their larger pipelines.

‘’Data quality is good overall, but not flawless. I still see occasional outdated titles, duplicate records, or contacts that require verification, especially for some international markets.’’ – G2 Review.

#2: Custom pricing that can be steep for SMEs

Next up, users of the platform mention that the tool’s pricing, which is not publicly available, can be steep for smaller businesses.

➡️ The way Seamless AI’s pricing works is with a standard for the industry credit-based pricing model, where reveals and exports consume credits, and can get expensive real fast when you’re revealing and exporting contacts at scale.

‘’The pricing is also a bit steep and can be improved.’’ – G2 Review.

#3: Limited global coverage

Last but not least, customers of Seamless AI are not happy with its limited international coverage.

A verified mid-market user of the tool mentions that the data is not fully updated for certain regions and industries, which has made them double-check before sharing the data with their team.

‘’One small drawback is that international records sometimes need better coverage.’’ – G2 Review.

What are the best Seamless AI alternatives on the market in 2025?

The best alternatives to Seamless AI are Warmly, with its signal-based revenue orchestration platform, Lusha and ZoomInfo.

Here’s a breakdown of the 10 AI prospecting tools that I shortlisted:

Tool	Use Case	Pricing
Warmly	Uses person-level intent signals to de-anonymize visitors, enrich contacts, and automate outreach via AI agents, giving you a smarter, signal-driven list rather than just “name and email.”	Starts at $10,000/year (AI Data Agent), $16,000/year (AI Outbound Agent), $22,000/year (AI Inbound Agent).
Lusha	Ideal for SDRs and small sales teams needing quick, on-the-fly contact lookups and LinkedIn enrichment.	Free plan available with 40 credits. Paid plans from $22.45/month (Pro) and $52.45/month (Premium). Scale plan has custom pricing.
ZoomInfo	Best for large sales and marketing organizations that need account intelligence, intent insights, and deep CRM integrations.	Custom pricing based on use case and data volume, typically starting around $15,000/year.
Apollo.io	Combines a large B2B contact database with built-in sequencing, lead scoring, and CRM sync to move directly from list building to outreach.	Free plan available. Paid plans from $59/user/month (Basic), $99/user/month (Professional), $149/user/month (Organization).
Cognism	Designed for teams doing international sales that require GDPR-compliant, phone-verified data and intent insights.	Custom pricing for Platinum and Diamond plans.
Reply.io	Ideal for scaling outbound outreach with automated multichannel sequences across email, calls, and social.	AI SDR Starter from $500/month, Growth from $2500/month, Enterprise from $15,000/month.
UnifyGTM	Suited for revenue operations teams that need to unify data and orchestrate workflows across the GTM stack.	Growth plan from $700/month. Pro and Enterprise plans have custom pricing with credit-based usage.
Clay	Best for automating lead list building and enrichment using AI web scraping and waterfall data validation.	Free plan available. Paid plans from $149/month (Starter), $349/month (Explorer), $800/month (Pro), with custom Enterprise pricing.
Kaspr	Built for teams relying on LinkedIn prospecting that want rapid contact extraction and enrichment within the EU.	Free plan available. Paid plans from $65/month (Starter) and $99/month (Business or Organization).
RocketReach	Ideal for data-driven teams needing reliable API access, batch lookups, and contact data enrichment at scale.	Paid plans from $99/user/month (Essentials), $165/user/month (Pro), $300/user/month (Ultimate).

#1: Warmly

Warmly offers the best Seamless AI alternative on the market in 2025 with our signal-based revenue orchestration solution that helps you de-anonymize your website visitors and then automatically reach out to them.

Our platform uses person-level intent signals to identify and prioritize your best prospects in real-time, so you can build your best lead list from intent data.

Disclosure: Even though Warmly is our sales tool, I’ll look to provide an objective perspective on why Warmly offers the best alternative to Seamless AI in 2025.

Warmly offers a signal-based revenue orchestration platform that lets you:

Identify website visitors (~60% of companies and ~15% of contacts).
Reveal which website visitors are most likely to convert.
Get insights into prospects so that your SDRs can tailor their strategies accordingly.
Automate essential sales processes on top of buying intent signals.

Let’s look at some capabilities that make Warmly so popular among sales teams looking to switch from Seamless AI:

Feature #1: Identify your website visitors at the account and contact level

Unlike Seamless AI, Warmly lets you maximize your website’s lead generation potential by identifying the companies and individuals visiting it.

All you have to do is to add a snippet of Warmly’s code to your website, and the sales intelligence software will start revealing your visitors in minutes.

In addition to company and individual-level identification, Warmly will also enrich your visitors’:

Contact data (email address, phone number, social media profiles, etc.).
Firmographics (company location, size, funding, etc.).
Demographics (individual names, job positions, etc.).
Technographics (tools and software a company uses).

But our visitor identification software doesn’t end there.

Warmly also tracks real-time 1st, 2nd, and 3rd-party intent signals to surface the visitors that matter most, so you can instantly prioritize outreach based on actual buying behavior.

That includes:

1st-party signals like pricing page views, repeated visits, product usage, or form fills.
2nd-party signals like relevant LinkedIn activity (e.g., industry-relevant discussions, posts, comments, likes, etc.).
3rd-party signals like competitor research or intent keywords being searched.

Our tool optimizes our data through a waterfall approach.

Warmly uses multiple data providers (20+), including 2 other leading website de-anonymization providers to validate the accuracy, quality & overall match rate of our signal & contact data.

This leads to:

Higher data quantity: Multiple sources expand match rates.
Higher data quality: Proprietary cleansing and confidence scoring validate accuracy.

💡 To maintain data quality and quantity, we continuously monitor vendor performance and validate our proprietary matching algorithms.

➡️ These systems allow us to track quality and quantity metrics in real-time to make sure that both contact-level and company-level data meet the high standards our customers expect.

Warmly’s transparent data commitment means you can test our data quality with our free tier before committing to us as a data provider.

Since we aggregate data from 25+ providers and cross-check it using our proprietary waterfall technique, the software can validate and verify data on your behalf, ensuring it’s of the highest quality.

Feature #2: Find prospects that look just like your best customers

Most tools give you firmographic filters, such as industry, headcount, location, and job title, and call it a day.

However, our tool goes much deeper.

With our AI-powered ICP identification capabilities, Warmly analyzes your actual customer data to uncover what really makes a good fit.

And it’s not just surface-level attributes: it’s patterns across the company tech stack, growth signals, org structure, seniority distribution, and even past engagement behavior.

Once Warmly understands who your best customers truly are, it’ll automatically scan its database of 200M+ contacts to find lookalike prospects, that is, the people and companies that closely resemble your top performers.

The end result is a list of not just any leads, but the right leads, so your team spends less time guessing and more time engaging the people most likely to convert.

Feature #3: Turn static lead lists into automated outreach with AI SDRs

Once you have built the lead list, Warmly doesn’t just let it sit there. It gets to work for you.

With AI Orchestrator and built-in AI SDR agents, Warmly turns every high-fit lead into a warm opportunity by triggering automated, personalized outbound across email and LinkedIn, based on real-time behavior and intent signals.

Here’s how it works:

Prospects who match your ICP and show strong signals (like visiting the pricing page or researching competitors) are instantly added to outbound sequences.
Messages are personalized automatically using contact data, context, and intent.

3. Warmly checks to avoid duplicate outreach and ensures contacts aren’t already being worked.

4. You can even set rules for account multithreading, so your AI SDR reaches all the key decision-makers, not just one person.

And this isn’t just task automation. It’s real prospecting, at scale, without increasing SDR headcount.

Feature #4: Build targeted lead lists from a 200M+ contact database (Coldly)

Similar to Seamless AI, Warmly offers a built-in prospecting platform, Coldly, which gives your team access to a constantly refreshed database of over 200 million contacts and accounts, so you can build high-quality prospect lists in seconds.

The database combines powerful filters with real-time enrichment to help you find exactly who you’re looking for across every channel.

You will be able to filter by:

Job title, function, or department.
Seniority level and decision-making role.
Company size, revenue, industry, or location.
Tech stack and hiring signals.
And dozens more customizable filters.

➡️ Each prospect comes pre-enriched with verified email addresses, phone numbers, and LinkedIn profiles, so your lists are not only accurate but also immediately actionable.

Bonus: There’s also a Chrome extension that lets your reps pull contact data directly from LinkedIn or any website, making manual prospecting a whole lot faster.

Warmly’s Integrations

Warmly integrates with a wide range of CRMs and sales platforms, including:

HubSpot CRM.
OpenAI.
Slack.
Apollo.
Outreach.
Demandbase.
RB2B.
Clearbit.
People Data Labs.
And more.

💡 For example, it’s possible to combine Warmly’s visitor identification software with HubSpot to alert your sales team the moment a known prospect arrives on the site.

With the HubSpot browser cookie, you can prioritize conversations with the leads who have shown the most engagement with your HubSpot campaigns.

In addition to deep integrations with several lead intelligence platforms, Warmly provides a Warm Bundle: partner discounts for over 25 sales, marketing, and GTM tools.

This way, your team can access many relevant tools and combine them with Warmly at a fraction of their usual price.

Pricing

Warmly’s pricing is modular and component-based and comes with a free plan that lets you identify up to 500 website visitors per month.

You can choose the components that best match the needs of your business, as components are priced by output and not just by a monthly fee.

There are 3 paid product plans that you can choose from:

AI Data Agent (Starts at $10,000/yr), which includes 5,000 credits, person-level web visitor de-anonymization (RB2B + Vector data), CRM integration, and access to our Coldly Contact Database.
AI Inbound Agent (Starts at $16,000/yr), which includes all AI Data Agent features, 10,000 credits, Intent-powered pop-ups (Warm Offers), AI chatbot & live video chat, and lead routing.
AI Outbound Agent (Starts at $22,000/yr), which includes 10,000 credits, automated signal-based outbound orchestration, email automation, LinkedIn automation, and email warmup.

Monthly credits on Warmly are used to track and engage with potential leads.

For example, each interaction or engagement with a lead will use up one credit, such as when you engage with a lead through email or LinkedIn.

➡️ Warmly’s pricing is ideal for larger SMB and MM companies with a growing or mature GTM motion with SDR, sales, and marketing functions.

How do Warmly’s credits work?

💡 Warmly will provide you with a certain amount of credits every month, depending on your monthly web visits and the amount you want to de-anonymize.

Once someone visits your website, the tool captures their first and last name, job title and company they work at, LinkedIn profile and business or personal email. This information takes 1 credit.

For example, each interaction or engagement with a lead will use up one credit, such as when you engage with a lead through email or LinkedIn.

How is Warmly different from Seamless AI?

While Seamless AI specializes in prospect discovery and contact enrichment, Warmly takes a signal-driven approach to lead prospecting.

Instead of only giving you verified contacts with intent data, Warmly de-anonymizes who’s visiting your site, tracks real-time behavior, and triangulates second- and third-party signals to surface prospects who are actively in-market for a solution like yours.

On the other side, Seamless AI provides you with verified emails and firmographic data to scale your outbound efforts with another tool.

Warmly finds intent earlier, enriches anonymous visitors with person- and company-level data, and activates outreach via automated sequences, AI-driven SDRs, and live engagement.

Here’s a breakdown of the 2 solutions’ functionality:

Category	Warmly	Seamless AI
Core Functionality	A signal-based revenue orchestration platform that de-anonymizes website visitors, ties people to accounts, and prioritizes in-market prospects for real-time engagement.	A real-time B2B lead search and data platform that provides a searchable prospector for contact discovery, and a live data engine for up-to-date contact details.
Data Enrichment and Intent Signals	Person-level 1st, 2nd and 3rd party intent signals captured from website behavior and external sources, enriched and tied back to CRM accounts to reveal contacts and companies visiting your site.	Verified contact and firmographic data with on-demand enrichment, database search filters for list building, and dedicated data enrichment tools to keep CRM records up to date.
Automation and Outreach	Built-in automation for rapid follow-up, including AI-powered SDR workflows, automated outreach via email and LinkedIn, and real-time on-site chat and video “warm calls” for engaging high-intent visitors.	Focused on delivering accurate contact data for outbound prospecting; integrates with CRM and outreach platforms but lacks built-in automation or real-time engagement tools.
Best for	GTM teams that want to identify, prioritize, and engage high-intent website visitors instantly through automated, personalized interactions.	Sales teams and marketers who need a reliable, continuously updated database of verified B2B contacts for outbound prospecting and list building.

Pros & Cons

✅ Identifies companies and individuals visiting your website.

✅ Enriches each identified lead with detailed B2B intelligence and reveals intent data.

✅ Versatile sales orchestration options.

✅ Live sales engagement capabilities.

✅ Reveals who your hottest prospects are right now.

✅ Generous free plan to get started with 500 website visitors to de-anonymize.

❌ Pricing is modular.

#2: Lusha

Best for: SDRs and small sales teams needing fast, on-the-fly contact lookups.

Similar to: Apollo.

Lusha is a lightweight contact enrichment tool with a browser extension and simple lookup flows, making it a strong Seamless AI alternative for teams that want quick, no-fuss contact discovery.

The platform trades deep enterprise features for speed and ease of use, which is ideal for SDRs and smaller sales teams.