Warmly vs Lead411: Which B2B Sales Tool Is Better in 2026?
Warmly and Lead411 both help B2B sales teams find leads, but they work in fundamentally different ways. Warmly identifies anonymous website visitors in real time and uses AI chatbots and intent signals to engage them. Lead411 provides a searchable database of verified B2B contacts with emails, direct dials, and sales triggers like funding rounds and executive changes. The right choice depends on whether you want inbound visitor intelligence or outbound contact data.
Quick comparison
| Feature | Warmly | Lead411 |
|---|---|---|
| Starting price | Free ($0/mo) | ~$75/mo (annual) |
| Paid plans from | $1,250/mo ($15K/yr) | ~$75/mo (annual) |
| Free plan / trial | Yes (500 visitors/mo) | Free trial (50 credits) |
| Primary function | Website visitor de-anonymization | B2B contacts database |
| Intent data | Bombora signals included | Bombora on Pro plan only |
| Contact data | Visitor-based identification | Verified emails + direct dials |
| AI features | AI chatbot for visitor engagement | None |
| CRM integrations | HubSpot & Salesforce only | 25+ CRMs |
| Sales triggers | Website visit behavior | Funding, hiring, exec changes |
| Best for | Inbound visitor conversion | Outbound prospecting |
What is Warmly?
Warmly is a website visitor identification platform that de-anonymizes companies and individuals visiting your site. It combines real-time visitor intelligence with Bombora intent signals and an AI-powered chatbot to engage high-intent visitors the moment they land on your pages. It integrates with HubSpot and Salesforce to sync visitor data directly into your CRM.
Key strengths:
- Free plan with 500 de-anonymized visitors/month and 10 Bombora signals/week
- AI chatbot that engages visitors in real time
- Real-time visitor identification with company and person-level data
- Bombora intent signals on all plans
- Fast setup — installs as a website script
- Strong ratings: G2 4.6/5
Key weaknesses:
- Paid plans start at $15,000/year ($1,250/mo) — steep jump from free
- Accuracy drops significantly outside the US
- CRM support limited to HubSpot and Salesforce only
Read our full Warmly review and pricing breakdown.
What is Lead411?
Lead411 is a B2B contact database that provides verified email addresses and direct-dial phone numbers for sales prospecting. It includes real-time data verification, sales triggers (funding rounds, hiring surges, executive changes), and Bombora intent data on its Pro plan. Unlike Warmly, Lead411 is a proactive outbound tool — you search for contacts rather than waiting for them to visit your website.
Key strengths:
- Verified B2B contacts with email addresses and direct dial numbers
- Real-time verification to reduce bounces
- 25+ CRM integrations (far more than Warmly)
- Sales triggers: funding, hiring, executive changes
- Bombora intent data on Pro plan
- Chrome extension for prospecting on LinkedIn and company websites
- Free trial with 50 credits — no commitment required
Key weaknesses:
- Export limits can be restrictive (200/mo on Basic Plus)
- Data-only tool — no built-in outreach or engagement features
- No free plan (only a trial)
- Intent data locked behind Pro plan (custom pricing)
- Smaller database compared to ZoomInfo or Cognism
Read our full Lead411 review and pricing breakdown.
Pricing comparison
| Tier | Warmly | Lead411 |
|---|---|---|
| Free / Trial | Free: $0/mo (500 visitors, 10 Bombora signals/week) | Free trial (50 credits) |
| Entry-level | TAM: ~$1,250/mo ($15,000/yr) | Basic Plus: ~$75/mo annual (~$99/mo monthly, 200 exports/mo) |
| Mid-tier | Inbound: ~$2,500/mo ($30,000/yr) | Pro with Bombora: ~$250/mo est. (custom, 10,000 exports/yr) |
| Top tier | Full GTM: Custom pricing | Enterprise: ~$500+/mo est. (custom, unlimited exports) |
The pricing gap is enormous. Lead411 Basic Plus costs roughly what Warmly's free plan costs (nothing vs ~$75/mo), while Warmly's first paid tier ($1,250/mo) is more than 16x Lead411's entry price. That said, Warmly's free plan does offer genuine value with 500 visitor identifications per month.
Feature comparison
| Feature | Warmly | Lead411 | Winner |
|---|---|---|---|
| Free access | Free plan (500 visitors/mo) | Free trial only (50 credits) | Warmly |
| Paid plan value | From $1,250/mo | From ~$75/mo | Lead411 |
| Contact verification | Visitor-based ID | Real-time email & phone verification | Lead411 |
| Intent data | Bombora on all plans | Bombora on Pro only | Warmly |
| AI features | AI chatbot for engagement | None | Warmly |
| CRM integrations | HubSpot & Salesforce only | 25+ CRMs | Lead411 |
| Sales triggers | Website visit behavior | Funding, hiring, exec changes | Lead411 |
| Outbound prospecting | Not designed for outbound | Searchable database with exports | Lead411 |
| Inbound conversion | Real-time visitor engagement | No inbound features | Warmly |
| Global accuracy | Drops outside US | Primarily US/NA focused | Tie |
Your sales team wants to identify which companies are visiting your website and engage them with an AI chatbot before they leave. Which tool does this?
Correct! Warmly specializes in website visitor de-anonymization with real-time AI chatbot engagement. Lead411 is a contacts database for outbound prospecting — it does not identify website visitors.
Only Warmly identifies anonymous website visitors and engages them with an AI chatbot. Lead411 is a searchable B2B contacts database for outbound sales prospecting.
Who should choose Warmly?
- Teams with significant website traffic who want to convert anonymous visitors
- Companies using HubSpot or Salesforce as their CRM
- Teams that want AI chatbot engagement for inbound visitors
- Organizations willing to invest $15K+/year for full visitor intelligence
- Startups wanting free visitor de-anonymization (500/mo on the free plan)
Who should choose Lead411?
- Sales teams running outbound prospecting campaigns
- Teams that need verified email addresses and direct-dial phone numbers
- Companies using CRMs other than HubSpot or Salesforce
- Budget-conscious teams — plans start at ~$75/mo vs Warmly's $1,250/mo
- Teams that want sales triggers (funding, hiring, exec changes) for timely outreach
You need verified direct-dial phone numbers for outbound cold calling and your team uses Pipedrive CRM. Which tool fits better?
Correct! Lead411 provides verified direct-dial phone numbers and integrates with 25+ CRMs including Pipedrive. Warmly only integrates with HubSpot and Salesforce, and is designed for inbound visitor identification rather than outbound prospecting.
Lead411 is the right choice here. It provides verified direct dials for cold calling and supports 25+ CRM integrations. Warmly only works with HubSpot and Salesforce and does not provide a searchable contacts database.
A simpler alternative: MentionAgent
Both Warmly and Lead411 give you data — visitor identities or contact records — but you still need to do the outreach yourself. Warmly identifies who visited your site; you still need to email them. Lead411 gives you verified contacts; you still need to write and send the messages. MentionAgent takes a different approach: it finds relevant prospects and handles the outreach automatically.
MentionAgent identifies prospects in your niche, writes personalized emails, sends them, and follows up. You just approve emails before they go out. No data exports needed, no separate outreach tool required.
- Price: $99/mo — cheaper than both Warmly's paid plans and Lead411's Pro tier
- Setup time: Minutes, not hours
- Manual work: Approve emails. That's it.
You want to find B2B prospects and reach out to them automatically, without managing data exports or writing email templates. Which tool fits?
Correct! MentionAgent ($99/mo) handles both prospecting and outreach end-to-end. Warmly and Lead411 both provide data that you need to act on manually with separate tools.
Warmly identifies visitors and Lead411 provides contacts, but both require you to handle outreach separately. MentionAgent ($99/mo) finds prospects and sends personalized outreach automatically — you just approve emails.
Skip the data. Go straight to results.
Warmly gives you visitor data. Lead411 gives you contact data. MentionAgent gives you booked meetings — it finds prospects, writes emails, and follows up automatically. You just approve and watch replies come in.
Start Getting Mentioned For $99/moRelated
All B2B Data Providers
Category
Email Outreach
Guide
Warmly alternatives
Compare
Lead411 alternatives
Compare
Frequently asked questions
Is Warmly or Lead411 better for B2B sales prospecting?
It depends on your approach. Warmly is better for inbound — it identifies anonymous website visitors and engages them in real time with AI chatbots and intent signals. Lead411 is better for outbound — it provides a searchable database of verified emails and direct dials for proactive prospecting. If you have high website traffic, Warmly can surface warm leads. If you need to build target lists, Lead411 is the better fit.
Which is cheaper, Warmly or Lead411?
For paid plans, Lead411 is far cheaper. Basic Plus starts at ~$75/month (annual) with 200 exports/month. Warmly's first paid tier is $15,000/year (~$1,250/month). However, Warmly does offer a free plan with 500 de-anonymized visitors/month and 10 Bombora signals/week, which Lead411 does not match (only a free trial with 50 credits).
Do Warmly and Lead411 offer intent data?
Both offer intent data but differently. Warmly includes Bombora intent signals on all plans, including the free tier (10 signals/week). Lead411 only includes Bombora intent data on its Pro plan (custom pricing, estimated ~$250/month). On Lead411's Basic Plus plan, you get sales triggers (funding, hiring, exec changes) but not Bombora intent data.
Is there a simpler alternative to both Warmly and Lead411?
MentionAgent ($99/mo) takes a different approach. Instead of giving you visitor data or a contacts database to work through manually, it finds relevant prospects and handles the outreach automatically. You approve emails before they go out — no data exports, no separate outreach tool, no campaign setup required.