Lead411 vs Seamless.AI (2026): which should you pick?

Pick Lead411 if

• Fits if you want direct dials alongside emails
• Works for a team that will commit to a year for the intent data

Look elsewhere if

• Tight if you want to test it properly: 7 days and 50 exports
• Pricey if you're a team: Ignite starts at $150 a month and varies by team size
• Skip it if you want intent data month to month, as it's tied to annual plans
• Watch out: annual plans may need a call to support to cancel

Pick Seamless.AI if

• Fits if you want contact data, emailing and a dialer from one company
• Works for companies ready to agree a contract with a sales team, prospecting on LinkedIn in Chrome

Look elsewhere if

• Not for you if you want to see a price before talking to sales
• Tight if you're on Basic, with 250 credits a month per user, refreshed on the contract date
• Skip it if you want a free plan that keeps going, as the 50 credits are a one-off
• Watch out: buyer intent searches use a separate allowance of intent topics, not your credits

Lead411

• Ignite monthly is priced 'starting at' $150; the FAQ says the price varies by team size.
• Intent data and unlimited data are tied to annual subscriptions.
• Annual plans may need support contact to cancel, per the FAQ.

Seamless.AI

• No prices are published: the pricing page sends visitors to a sales inquiry form.
• The help center lists 250 credits a month per user on a Basic license and 10,000 on Pro, refreshed on the contract date.
• The free license is a one-time grant of 50 credits that does not renew.
• Buyer intent searches use a separate allowance of intent topics rather than credits.

Lead411

Verified emails and direct dials

Lead411 says emails are checked by SMTP, human review and open validation, and phones are matched to a person's locations.

Chrome extension

Find contact data while browsing LinkedIn and company websites.

Search and lead scoring

Filters cover technology stack, hiring, funding and international contacts; saved searches keep results together.

Buyer intent data

Intent data is included on annual Spark, an add-on for annual Ignite and optional on Blaze.

AI search assistant

Live AI research looks for an email that is not already in the database.

CRM sync

Syncs with Salesforce, HubSpot, Pipedrive and Outreach, per the homepage.

Seamless.AI

Contact research

Finding a contact costs 1 credit and returns the profile's titles, emails and phone numbers, including direct dials and cell phones where found.

Chrome extension

Looks up contact details for professionals on LinkedIn and other websites while browsing.

Data Enrich and Job Changes

Fill gaps in uploaded lists or CRM records for 1 credit per row, and monitor saved leads for job changes.

AI writing and campaigns

An AI assistant and AI campaigns write outreach messages at 0.2 credits per message or interaction.

Emailing and calling

Send tracked, personalized email with templates from inside the app, and call contacts from a built-in dialer.

Autopilot, API and MCP

Autopilot runs contact research in bulk, owners and admins can create API keys, and apps connect it to Claude and ChatGPT.

Lead411

• Spark (monthly)$49

  per month for 1,000 exports, billed monthly

  Emails and direct dials, Chrome extension, CRM customizations, company news and an AI search assistant.

• Ignite (monthly)$150

  per month and up, billed monthly

  Starts at 1,000+ exports a month and adds API access.

• Spark (annual)$490

  per year for 12,000 exports, billed annually

  Adds buyer intent data; unused exports roll over, per the page.

• Ignite (annual)$1500

  per year, flexible exports

  API access; buyer intent data is an add-on.

• BlazeCustom

  Unlimited exports a year, with intent data optional.

Seamless.AI

Pricing could not be confirmed. See seamless.ai.

Lead411

• Annual discount

  Annual Spark costs $490 a year

  The annual Spark plan at $490 compares with $588 for twelve months of monthly Spark at $49, and adds buyer intent data.

Seamless.AI

No public discounts listed.